This report describes a plant model of the advanced BWR (ABWR) plant. The model has been jointly developed by CRIEPI and General Electric Company (GE). This model is designed for combining it with the CRIEPI power system dynamics analysis program and for ...

The ABWR Design Verification Program is aimed at restoring confidence in the US licensing process by demonstrating its workability by obtaining USNRC preapproval of GE's ABWR Standard Plant. The purpose of this work is to achieve full NRC approval of the ABWR through the award of an NRC Staff final design approval (FDA) and ...

The Advanced Boiling Water Reactor-II (ABWR-II) is under development, based on the technologies and experiences of ABWR, to further improve the performance and economy. There are new systems and components developed or under development to incorporate into the primary system of ABWR-II. This ...

...by the applicant's exemptions and departures...and updates to the plant-specific DCD required...Include, in the plant-specific DCD, the...referenced in the U.S. ABWR DCD. B...document for the U.S. ABWR, dated December 1994, for plants referencing this...

This paper discusses the safety design of the Toshiba Boiling Water Reactor (TOSBWR) which was created {approx}8 years ago. The design concept is intermediate between conventional boiling water reactors (BWRs) and the advanced BWR (ABWR). It utilizes internal pumps and fine motion control rod drive, but the ...

This paper describes an effort by Tokyo Electric Power Company (TEPCO) to shorten the construction time in a drastic manner for the Advanced Boiling Water Reactors (ABWR), thereby aiming at reducing construction costs. First an outline of the actual construction records for the five BWR Units and the two ABWR Units ...

An innovative reactor core concept applying spectral shift rods (SSRs) is proposed to improve the plant economy and the operability of the 1700-MW(electric) Advanced Boiling Water Reactor II (ABWR-II). The SSR is a new type of water rod in which a water level is naturally developed during operation and changed according to the coolant ...

A new non-fertile, weapons-grade plutonium oxide fuel concept is developed and evaluated for deep burn applications in a boiling water reactor environment using the General Electric 8x8 Advanced Boiling Water Reactor (ABWR) fuel assembly dimensions and pi...

General Electric Company`s (GE`s) Advanced Boiling Water Reactor (ABWR) has been approved for operation in Japan, and the final design approval (FDA) by the U.S. Nuclear Regulatory Commission is scheduled for mid-1994. One possible utilization of the ABWR would be to operate with mixed oxide (MOX) fuel with the ...

A methodology has been developed for probability-based standards for low-pressure piping systems that are attached to the reactor coolant loops of advanced light water reactors (ALWRs) which could experience reactor coolant loop temperatures and pressures because of multiple isolation valve failures. This accident condition is called an intersystem loss-of-coolant accident ...

1000 MWe Advanced Boiling Water Reactor has only two main steam lines and six reactor internal pumps, whereas 1350 MWe ABWR has four main steam lines and ten reactor internal pumps. In order to confirm how the differences affect hydrodynamic conditions in the dome and lower plenum of the reactor pressure vessel, fluid analyses have ...

Two advanced boiling water reactors (ABWRs) whose electric output power is 1356 MW have been commercially operated since 1996 and 1997 by the Tokyo Electric Power Company (TEPCO) in Japan. Features of an ABWR are reactor internal pumps (RIPs) placed in the lower plenum and downcomer, peripherally bottom-mounted on ...

In order to investigate the stability of a nuclear reactor core with an oxide mixture of uranium and plutonium (MOX) fuel installed, channel stability and regional stability tests were conducted with the SIRIUS-F facility. The SIRIUS-F facility was designed and constructed to provide a highly accurate simulation of thermal-hydraulic (channel) instabilities and coupled thermalhydraulics-neutronics ...

The technology status of the Advanced Boiling Water (ABWR) and Simplified Boiling Water (SBWR) reactors are presented along with an analysis of the economic potential of advanced nuclear power generation systems based on BWR technology to meet the projected domestic electrical generating ...

Appendix A-5 of Draft Regulatory Guide DG-1199 'Alternative Radiological Source Term for Evaluating Design Basis Accidents at Nuclear Power Reactors' provides guidance - applicable to RADTRAD MSIV leakage models - for scaling containment aerosol concentration to the expected steam dome concentration in order to preserve the simplified use of the Accident Source Term (AST) in ...

The high-conversion boiling water reactor (HCBWR) has been studied as one of the next-generation BWRs. The HCBWR can be improved by the use of island-type fuel, which has mixed-oxide rods in the bundle interior and uranium rods only in the small region of the periphery, to have inherently negative void coefficient (i.e., negative void coefficient in infinite lattice ...

The current Army Boiling-Water Reactor program is reviewed. Plant design, core analysis, reactor theory development, and health physics studies are discussed for the Portable Low-Power Plants (PL-1 and PL-2). Plans for installing a PL-2 plant in a snow tunnel at Byrd Station in Antarctica are described. (B.O.G.)

As part of the design certification process, probabilistic safety assessments (PSAS) are performed at the design stage for each advanced nuclear power plant. Among other usages, these PSAs are important inputs in defining the Technical Specifications (TSs) for these plants. Knowledge gained from their use in improving the TSs for operating nuclear power plants is providing ...

This report provides the results of investigating the basis for including Station Design Alternatives (SDAs) in the regulatory guidance given for nuclear plant environmental reports (ERs), explains approaches or processes for evaluating SDAs at the early site permit (ESP) stage, and applies one of the processes to each of the ten systems or subsystems considered as SDAS. The key objective o this ...

Prior to the establishment of the Japan Nuclear Energy Safety Organization (JNES), the Nuclear Power Engineering Corporation (NUPEC) of Japan conducted a series of large-scale field tests for the Ministry of Economy, Trade and Industry (METI) of Japan to address various aspects of the soil-structure interaction (SSI) effect on the seismic response of nuclear power plant (NPP) structures. The ...

A new non-fertile, weapons-grade plutonium oxide fuel concept is developed and evaluated for deep burn applications in a boiling water reactor environment using the General Electric 8x8 Advanced Boiling Water Reactor (ABWR) fuel assembly dimensions and pitch. Detailed infinite lattice fuel burnup results and ...

(GE ABWR, ABB-CE SYSTEM 80+, Westinghouse AP600, Westinghouse AP1000) � 3 designs pending approval (GE in Japan & under construction in Taiwan � Westinghouse (600 & 1100 MWe Two-Loop PWR) � Advanced Passive (AP

The ACRS has been reviewing various advance plant designs for certification. The most active reviews have been for the ABWR, AP600, and System 80+. We have completed the reviews for ABWR and System 80+ and are presently concentrating on AP600. The ACRS gave essentially unqualified certification approval for the two completed reviews, ...

A series of calculations were performed to analyze the response of General Electric Company's (GE) advanced boiling water reactor (ABWR) during an anticipated transient without scram (ATWS). This work investigated the early plant response with an assumed failure or manual inhibit of the high pressure core flooder (HPCF). ...

Oak Ridge National Laboratory (ORNL) is investigating passive and inherent safety options for Advanced Light-Water Reactors (ALWRs). A major activity in 1989 includes identification and characterization of passive safety system and inherent safety feature building blocks, both existing and proposed, for ALWRs. Preliminary results of this work are reported herein. This activity ...

This paper reports on the current development status of the ABWR-II project, a next generation reactor design based on the ABWR. In the early 90's, a program to develop the next generation reactor for the 21. century was launched, at a time when the first ABWR was still under construction. At the initial stage of this project, ...

This review examines recent advances made in predicting boiling heat fluxes, including some key results from the past. The topics covered are nucleate boiling, maximum heat flux, transition boiling, and film boiling. The review focuses on pool boiling of pure liquids, but ...

dichiarato da costruttori USA (2008) per gli impianti AP1000 (Westinghouse), ABWR e ESBWR (GE-Hitachi) � dell Reactor) di Areva, AP1000 (Advanced Pressurized) di Westinghouse, ESBWR (General Electric) e IRIS del: 3000 $/kWe; GE-Hitachi ESBWR: 3000 $/kWe; GE-Hitachi ABWR: 3000 $/kWe. I costi dichiarati dalle

... Accession Number : ADD330220. Title : ADVANCED BOILING WATER REACTOR MATERIALS TECHNOLOGY,. Corporate Author : ...

Contents include: a contribution to the special issue-1100 MW nuclear power station 2 sets completed and its technical significance-construction of Fukushima Daini Nuclear Power Station, Unit No.3; construction of Kashiwazaki Kariwa, Nuclear Power Station Unit 1; experience in operation of 100% turbine bypass system for nuclear power plant; the technical achievement in the latest 1100 mw; BWR ...

Many developed countries are improving or operating the advanced I and C systems of NPPs. They are: (1) N4 of EDF in France, (2) AP 600 of Westinghouse in USA, (3) NUPLEX-80+ of ABB-CE in USA, (4) CANDU in Canada, (5) Ohi 3 and 4, APWR and ABWR in Japan, ...

OAK B188 Risk-informed assessment of regulatory and design requirements for future nuclear power plants. Annual report. The overall goal of this research project is to support innovation in new nuclear power plant designs. This project is examining the implications, for future reactors and future safety regulation, of utilizing a new risk-informed regulatory system as a replacement for the current ...

GE's latest evolution of the Boiling Water Reactor, the ESBWR, combines improvements in safety with design simplification and component standardization to produce a safer, more reliable nuclear power plant, with lower projected construction costs than plants in operation today. The ESBWR program started in the early 1990's when GE was developing the ...

This article is a review of final design approval efforts for advanced light water reactor designs. It notes that FDA has been given for the GE 1300 MWe ABWR and the ABB-Combustion Engineering 1300 MWe System 80+, and the applications for a smaller GE plant and the Westinghouse AP-600 are now being considered. The advantages of these designs are discussed, ...

This paper is focused on the preliminary analysis of results obtained on the first cores of the first phase of the BASALA (Boiling water reactor Advanced core physics Study Aimed at mox fuel Lattice) programme, aimed at studying the neutronic parameters in ABWR core in hot conditions, currently under investigation in the French EOLE ...

The program includes the operation and test evaluation of the SL-1 (ALPR) and an associated design and development program with the objective of obtaining improved, portable, and modularized BWR plants in the low power range. Volume 1 discusses SL-1 plant operational experience, outlines major maintenance and modifications performed, presents plant test activities, including a major ...

The purpose of this paper is to provide the quantitative evaluation method with regard to the Digital Protection systems (DPSs) that were newly adopted in the ABWR plants and to show the results of level-1 PSA of the ABWR plants. (authors)

... COMPOUNDS, GUANIDINES, UREA, BOILING POINT, CARBAMIC ACID, UREIDES, HALOGEN COMPOUNDS, HYDRAZINE DERIVATIVES ...

These two volumes were issued separately, but are cataloged as a unit. The PL-2 is a natural circulation, boiling water reactor plant designed to deliver 1000 kw of net electric power and plant is similar in design to the SL-1 which was operated at NRTS since 1958. Details are given concerning installation of PL-2 in a snow tunnel; however, this reactor is suitable ...

The reference design of a Portable Boiling Water Reactor Plant with a net electric output of up to 250 kw and a net space heat output of 400 kw is presented. The total reactor thernnal pewer is 3.6 Mw, and the design life of the core is 8 full power years. The principle objectives which have governed the reference design are: (1) the plant shall be air tnansportable ...

... waste heat from the motor boils the liquid ... metal and the subcooled liquid phase ... Conductances include boiling, condensation, convection across the ...

This article reviews the significant advances in the understanding of the boiling process germane to mixtures. The scope of this review is limited to miscible systems. The effects of impurities (such as lubricating oils in refrigerants), surfactants, soluble salts, and dissolved gases are excluded from consideration. Both pool and convective ...

General Electric (GE) has proposed an advanced boiling water reactor, the Simplified Boiling Water Reactor (SBWR), which will utilize passive, gravity-driven safety systems for emergency core coolant injection. The SBWR design includes no recirculation lo...

ORNL has conducted a Nuclear Power Options Viability Study for the Department of Energy. That study is primarily concerned with new technology which could be developed for initial operation in the 2000 to 2010 time frame. Such technology would have to compete not only with coal options but with incrementally improved commercial light-water-reactors. This survey reported here was undertaken to gain ...

The diffusion of turbulent buoyant jets is considered along with the boiling of multicomponent liquid mixtures, heat flow rates in saturated nucleate pool boiling, and a review of turbulent-boundary-layer heat transfer research at Stanford, 1958-1983. In connection with the boiling of mulitcomponent liquid mixtures, attention is given ...

An innovative reactor core concept applying spectral shift rods (SSRs) is proposed to improve the plant economy and the operability of the 1700 MWe ABWR-II reactor. The SSR is a new type of water rod, in which a water level is naturally developed during operation and changed according to the coolant flow rate through the channel. By taking advantage of the largeness of the ...

Standard design certification has been used over the past 20 years to develop NRC approval of Advanced Light Water Reactor (ALWR) designs. The standard design approval approach is intended to remove much of the uncertainty in the regulatory schedule prior to commitment of major funds to construction. The value of the approach has not been tested in the US but it has supported ...

This paper reviews the application of US LWRs that are loaded with all-MOX fuel to dispose of excess weapon plutonium. The information presented is based on the DOE study results summarized in the 1993 DOE report, and the detailed reports submitted by reactor designers to DOE for that report. The reactor designs are the Westinghouse (Plutonium Disposition Reactor) PDR600, the GE ...

... respectively. The low thermal resistance was achieved as a result of the subcooled liquid and thin film boiling. Note that ...

Lectures on the dynamic behavior of boiling-water reactors are presented. Topics covered include: measurements and interpretation of transfer functions and hydrodynamic instabilities in boiling loop experiments, dynamics of boiling-water reactors, and fuel-temperature dynamics. (M.C.G.)

This article details the advanced nuclear power plant construction techniques that have been perfected overseas and are likely to be integrated into the building of new nuclear plants in the U.S. The author, an engineering consultant, focuses specifically on innovations that Hitachi has made in streamlining plant construction, including prefabrication, stacking models, ...

In boiling water reactors (BWRs), traversing incore probes (TIPs) are used for the continuous measurement of the axial distribution of neutron flux in a reactor and the calibration of local power range monitors (LPRMs). One of candidates for a substitute for TIP is gamma thermometers (GTs). Some researches have been conducted so far for the verification of applying GT to BWR ...

The reference design of a Portable Boiling Water Reactor Plant with a net electric output of up to 1000 kw and a net space heat output of 400 kw is presented. The total reactor thermal power is 8.8 Mw and the design life of the core is three full power years. The principle objectives which governed the reference design are: (l) The plant should be air transportable ...

ABSTRACT: There has been increasing interest of late in nanofluid boiling and its use in heat transfer enhancement. This article covers recent advances in the last decade by researchers in both pool boiling and convective boiling applications, with nanofluids as the working fluid. The available data in the ...

There has been increasing interest of late in nanofluid boiling and its use in heat transfer enhancement. This article covers recent advances in the last decade by researchers in both pool boiling and convective boiling applications, with nanofluids as the working fluid. The available data in the literature is ...

The main goal of the project was to study analytically and experimentally the condensation heat transfer for the passive condenser system such as GE Economic Simplified Boiling Water Reactor (ESBWR). The effect of noncondensable gas in condenser tube and ...

From 4th international seminar on heat and mass transfer in liquid metals; Trojir, Yugoslavia (6 Sep 1971). See CONFExperimental measurements of incipient-boiling superheats with sodium have been conducted with EBR-II primary sodium and no inent cover gas. These tests have shown that a large incipient superheat can result in a boiling surface ...

A series of lectures was presented including topics on history and current status of boiling water reactor development. physics of boiling water reactors. BORAX and SPERT experiments. reactor transfer functions. small oscillations in boiling water reactors. hydraulic model of boiling reactor dynamics, ...

In 2005 the German Reactor Safety Commission issued specific requirements on core coolability demonstration for PWR ATWS (anticipated transients without scram). Thereupon AREVA NP performed detailed analyses for all German PWRs. For a German KONVOI plant the results of an ATWS licensing analysis are presented. The plant dynamic behavior is calculated with NLOOP, while the hot channel analysis is ...

gram are to test nuclear superheating concepts and to advance the technology of boiling-water-reactor design by performing experiments which will improve the understanding of factors limiting the stability of boiling reactors at high power densities. The reactor vessel is a cylinder with ellipsoidal heads, made of carbon steel ...

The ability to accurately predict the time required to reach a boiling transition in postulated BWR (Boiling Water Reactor) loss of coolant accidents is an important step in analyzing the system response to these transients. As part of the effort to develop an advanced BWR system analysis computer code capable of simulating these ...

This report contains an extensive evaluation of GE advanced boiling water reactor plants prepared for United State Department of Energy. The general areas covered in this report are: core and system performance; fuel cycle; infrastructure and deployment; and safety and environmental approval.

To satisfy the need for verification of the computer programs and modeling techniques that will be used to perform the final piping analyses for an advanced boiling water reactor standard design, three benchmark problems were developed. The problems are representative piping systems subjected to representative dynamic loads with solutions developed using ...

Heat transfer data from using the electronic feedback loops were obtained. ..... Effects in Cryogenic Heat Transfer, Advances in Cryogenic Heat Transfer ...

... opinion build against the US and Israel. After several months of letting world anger boil over ... advanced AMD weapon systems on the planet. ...

... ASME Code inspection requirements for boiling water reactor (BWR) pressure ... ANF) subsidiary of Siemens Nuclear Power Services has developed ...

... resistance varied between 0.83 and 0.92°C-cm²/W. Such low thermal resistance was attributed to the thin film boiling of the subcooled liquid. ...

Sep 18, 2007... depots and extraterrestrial bases, and cooling systems for observation platforms requiring large arrays of infrared and X-ray detectors. ...

The surface temperature during nucleate boiling was measured with a special thermocouple so designed as to measure the temperature of a small area and to have an extremely rapid response time. The surface temperature was found to drop occasionally 20 to 30 deg F in about 2 msec during the boiling of water. This indicates a rapid extraction of ...

The Berenson flat-plate transition-boiling experiment were recreated with a reduced thermal resistance in the heater, and an improved access to those portions of the transition-boiling regime that have a steep negative slope. Test were made in Freon-113, acetone, n-pentane, and benzene boiling on horizontal flat copper heaters that ...

Boiling is scarcely documented in heat pipe literature due to the complexity of the phenomena. Most heat pipe designers simply avoid the boiling limit and design systems that operate well below boiling. However, with recent technological advances and limited development of heat pipe technology, heat pipes are ...

A 3-D model to predict the thermal behavior of ANS (Advanced Neutron Source) fuel miniplates has been developed. Possibility of explosive boiling was considered, and it was concluded that the heating rates (existant in NSRR tests) are not large enough for this to occur. However, transient boiling effects were pronounced. Because of the ...

Materials characteristics of candidate cladding tubes made of Fe-25Cr-35Ni-Ti (UHP grade) alloy developed for 100 GWd/t(MOX) fuels planned in the advanced LWRs were compared with that of Type 304SS tubes used in atomic power ship 'Mutsu'. The mechanical strength of the candidate with ultra low carbon was maintained as same as Type 304SS by grain fining effect ...

Advanced cooling concepts that permit the design of water cooled heat exchangers for use as calorimeters and beam dumps for advanced neutral beam injection systems were evaluated. Water cooling techniques ranging from pool boiling to high pressure, high v...

This study sought to develop a high-temperature coolant for future advanced military diesel engines capable of operating at high temperatures (up to 150 C). The desirable coolant for high-temperature application must have a high boiling point, a low freez...

The Primary objective of the proposed project is to apply and extend the latest advancements in LWR fuel management optimization to the design of advanced boiling water reactor (BWR) fuel assemblies specifically for the recycling of minor actinides (MAs).

The Stationary Low Power Reactor No. 1 is a three Mw boiling water reactor designed to demonstrate the feasibility of a nuclear reactor to supply electrical power and space heat for remote sites. In addition to performance evaluation the facility provides training for military personnel. The reactor was operated for 1159 hr during the quarter for a total core burnup ...

The previous work on the predictton of void volume in transient saturated pool boiling is re-examined for the purpose of improving the established prediction. A general mathematical formulation of transient-void- volume prediction is presented. The feasibility of having a complete solution relies much on such formidable problems as the correct bubble-growth law and ...

Contents: Saturated boiling, subcooled boiling, mechanism of nucleate boiling, fluid flow with boiling, boiling terminology; nucleation and bubble dynamics, nucleation from a solid surface, homogeneous nucleation and radiation effects, bubble dynamics; nu...

Concepts used by two classes of grade eight students, one advanced and the other average, to explain the changes that occur when water is heated to boiling are presented. Little difference was found between groups in terms of the personal misconceptions used to explain boiling. The changes that take place in conceptual knowledge ...

Heat balances around Rexnord solidifier were calculated using data obtained from its operation at the Wilsonville Advanced Coal Liquefaction Facility. In addition, a HEAF fume removal system was tested on the exhaust from the solidifier hood. The materials collected in the fume sampling apparatus were analyzed for boiling point range and identifiable ...

function u contact angle Subscripts a advancing evp evaporation l liquid lim limiting r receding satNumerical study of single bubbles with dynamic contact angle during nucleate pool boiling Abhijit observed that the contact angle at the bubble base varies during the ebullition cycle. In the present

The heat transfer and fiuid fiow program which will govern the activities of the Bettis Thermal and Hydraulics Section during the period July l through December 31, l957, is outlined under three general headings, Experimental Boiling Program, Experimental Non-Boiling Program, and Theoretical Studies. (auth)

The book includes an appendix that describes advances made in two-phase flow as applicable to reactor safety code modeling. It is considered by many to be the definitive work in the field. Current theories on boiling and two-phase flow as well as supercritical heat transfer are presented. Also examined are the similarities and dissimilarities in the ...

This report documents results of a series of scoping experiments on boiling from downward-facing surfaces in support of the Sandia New Production Reactor, Vessel-Pool Boiling Heat Transfer task. Quenching experiments have been performed to examine the boiling processes from downward-facing surfaces using two 61-centimeter diameter test ...

The advanced Simplified Boiling Water Reactor (SBWR) designed by General Electric (GE) is a natural circulation system without any active pump, which along with the reduced power density has resulted in an improved performance on thermal-hydraulic stabili...

Thermal and pressure control tests were performed at sub-critical LN2 temperatures and approximately 2 atmospheres pressure. The cold side of the ZBO system ...

Progress in the Space Power Advanced Reactor (SPAR) Program includes indications that revision of the BeO reflector configuration can reduce system weight. Observed boiling limit restrictions on the performance of the annular-wick core heat pipe have acce...

Re-liquefaction for in-space refueling. " Improved efficiency for turbo- ... Re- liquefaction of LNG boil-off. " LH2 production for automotive fuel cells ...

A series of simulations were performed at Idaho National Engineering Laboratory (INEL) to continue the advancement of Boiling Water Reactor (BWR) safety research, with the TRAC-BD1 (Version 12) computer code. The principal motivation for performing these ...

In order to predict the behaviour of boiling water reactor (BWR) cores during longterm operation, reactor cycle calculations including control rods have to be used to analyze the fuel loadings with respect to their burnup behaviour and operation safety. S...

The laboratory has been active for some time in the development of improved desalination equipment to provide potable water at advanced bases. A review of the current literature on the physics of boiling disclosed a consensus that (1) nucleation is necess...

After an introduction and general explanation of nuclear power the following reactor types are described: magnox thermal reactor; advanced gas-cooled reactor (AGR); pressurised water reactor (PWR); fast reactors (sodium cooled); boiling water reactor (BWR...

For the past decade, efforts have been growing in the development of high heat flux (HHF) components for many applications, including fusion and fission reactor components, advanced electronic components, synchrotrons and optical components, and other adv...

that is most suitable for the given temperature range. High temperature system uses high boiling point refrigerants such as R-404A, R-507A, R-134A, propane, butane, and ammonia,...

The challenges of NASA's Exploration vision require advanced Cryogenic ... have been developing high heat capacity rare earth alloys for just this purpose. ... in collaboration with DoD for demonstrating Zero Boil-Off (ZBO) storage and ...

Jul 11, 2008 ... Spray Bar Zero-Gravity Vent System for On-Orbit Liquid Hydrogen Storage � Results of an Advanced Development Zero Boil-Off Cryogenic ...

Oct 23, 2008 ... Long-life, high-capacity cryocoolers are a critical need for future space systems utilizing stored cryogens. The cooling requirements for ...

Prior to the DF-4 boiling water reactor (BWR) severe fuel damage (SFD) experiment conducted at the Sandia National Laboratories in 1986, no experimental data base existed for guidance in modeling core component behavior under postulated severe accident co...

Advanced surveillance diagnostics were applied to key nuclear power plant valves to improve the availability of the power plant. Two types of valves were monitored: boiling water reactor (BWR) three-stage, pilot-operated safety/relief valves and pressuriz...

May 27, 2010 ... ISRU Propellants. Closed-Loop Life. Support. Advanced Propulsion. Cargo Aerocapture at Mars. Improved Cryogenic Boil-off. ISS at Assembly ...

Abstracts Archive 14.07-8294 (SBIR 1996-1) A Low Cost, Self-Acting, Liquid Hydrogen Boil-Off Recovery System � Afab Technologies Inc Joy W. Pelfrey ...

Research and development on advanced high heat flux cooling technology for electronic devices has been carried out as the Project of Fundamental Technology Development for Energy Conservation, promoted by the New Energy and Industrial Technology Development Organization of Japan (NEDO). Based on the microgravity experiments on boiling heat transfer, the ...

The overall operating temperature and efficiency of solar-powered Stirling engines can be improved by adding a heat transport system to more uniformly supply heat to the heater head tubes. One heat transport system with favorable characteristics is an alkali metal pool boiler. An alkali metal pool boiler heat transport system was designed for a 25-kW advanced Stirling ...

The phenomena known as density-wave instability often occurs in phase change systems, such as boiling water nuclear reactors (BWRS). Our current understanding of density-wave oscillations is in fairly good shape for linear phenomena (eg, the onset of instabilities) but is not very advanced for non-linear phenomena [Lahey and Podowski, 1989]. In particular, ...

The phenomena known as density-wave instability often occurs in phase change systems, such as boiling water nuclear reactors (BWRS). Our current understanding of density-wave oscillations is in fairly good shape for linear phenomena (eg, the onset of instabilities) but is not very advanced for non-linear phenomena [Lahey and Podowski, 1989]. In particular, ...

This paper reports the result of a study that evaluated the applicability of the seismic isolation system to nuclear power plants. The study focuses on possibilities of a standard design with improved seismic safety of building and equipment for ABWR-II. A base isolation system with laminated lead rubber bearing was applied in the study. Based on the structural design of ...

-2019 3,787 [5] Southern Plant Vogtle 2 units AP1000 2,200 2016-2017 4,745 [6] NRG South Texas 3 & 4 ABWR

To investigate the applicability of existing seismic soil-structure interaction (SSI) computer codes to deeply embedded and/or buried (DEB) structures, Brookhaven National Laboratory (BNL) performed a correlation analysis. The correlation analysis was per...

Appendix A-5 of Draft Regulatory Guide DG-1199 'Alternative Radiological Source Term for Evaluating Design Basis Accidents at Nuclear Power Reactors' provides guidance - applicable to RADTRAD MSIV leakage models - for scaling containment aerosol concentra...

The overall operating temperature and efficiency of solar-powered Stirling engines can be improved by adding an alkali metal pool boiler heat transport system to supply heat more uniformly to the heater head tubes. One issue with liquid metal pool boilers is unstable boiling. Stable boiling is obtained with an enhanced boiling surface ...

enheder) eller GE's ABWR (5 enheder), mens enkelte enheder er baseret p� General Electric's ESBWR og Areva ESBWR designet, mens Areva ventes at indsende en ans�gning om godkendelse af US EPR-enheden i de- cember angiver en konstruktionspris p� 1850 USD/kWe for ABWR enheden og 1600 USD/kWe for ESBWR. Der foreligger

A frame-based technique, including physical frame, logical frame, and cognitive frame, was adopted to perform digital I and C failure events derivation and analysis for generic ABWR. The physical frame was structured with a modified PCTran-ABWR plant simulation code, which was extended and enhanced on the feedwater system, recirculation system, and steam ...

Early in early 1992, 180 million gallons of advanced primarily treated sewage emptied into 10 meters of water from the broken Point Loma sewage pipe, San Diego. For about two months a sewage boil about the size of a football field existed at the surface and within the Point Loma kelp bed. Sampling and observations taken during the spill indicated the ...

Boiling is one of the most efficient modes of heat exchange. Yet, in applications involving boiling in micro-devices or under microgravity conditions it is extremely desirable to enhance the heat transfer rate even further to increase the efficiency of these systems. An enhancement mechanism that is particularly attractive is the one due to application of ...

The ability to apply numerical simulation to three-dimensional multiphase flows has existed now for nearly two decades. However, only in the last 2 or 3 years has this technology advanced into the realm of boiling flows. The difficulties inherent when computing solutions to these flows lie in the fact that not only do we need to accurately incorporate the ...

The direct vessel injection (DVI) mode of a safety injection system is adopted instead of a conventional cold leg injection (CLI) mode as one of the advanced design features of the APR1400 (Advanced Power Reactor 1400 MW). From the calculation results of RELAP5 with full plant, it is found out that the sudden boiling happens in the ...

This paper reviews recent advances in enhancing boiling heat transfer from electronic components immersed in dielectric liquids by use of surface microstructures. The microstructures developed include rough surfaces produced by sanding, vapor blasting hard particles, sputtering of SiO2 followed by wet etching of the surface, chemical vapor deposition of ...

It was envisioned that the superconducting lens magnets for the Advanced Hydrotest Facility (AHF), which was under study at Los Alamos National Laboratory, would be cooled with pool-boiling helium. However, a supercritical-cooling approach would relieve space and other constraints in critical areas, in addition to eliminating potential vapor-trapping in ...

The present experimental work on the extraction of the coal liquids and the different distillate fractions has demonstrated that aqueous methanol is a practical solvent for separating the nitrogen and oxygen compounds in the naphtha and middle distillate boiling ranges. The naphtha hydrocarbons are lighter than the solvent and the middle distillate hydrocarbons, particularly ...

Propellant densification has many beneficial properties when space launch systems are considered. Among these are reduced tank volumes, decreased vapor pressures, and increased enthalpy gain before boil off. Previous NASA investigations have focused on advanced methods of producing densified propellants, but not much work has been accomplished in the area ...

Heat transfer phenomena involving boiling and condensation are an important aspect of engineering in the power and process industries. This book, aimed at advanced first-degree and graduate students in mechanical and chemical engineering, deals with these phenomena in detail. The first part of the book describes gas-liquid two-phase flow, as a necessary ...

The origins and goals of the advanced fluid dynamics model (AFDM) program are described, and the models, algorithm, and coding used in the resulting AFDM computer program are summarized. A sample fuel-steel boiling pool calculation is presented and compared with a similar SIMMER-II calculation. A subjective assessment of the AFDM developments is given, and ...

#12;ix ACRONYMS ADU Ammonium Diuranate (Process) ARIES Advanced Recovery and Integrated Extraction System percent PuO2 and 95% depleted UO2, the latter converted by the ammonium diuranate (ADU) process. All ATR Advanced Test Reactor AUC Ammonium Uranyl Carbonate (Process) BOL Beginning of Life BWR Boiling

S>Advanced designs of power reactor types and possible future developments are discussed in detail. The following reactor types are treated: pressurized light water, boiling light water, graphite-moderated gas-cooled, and heavywater-moderated. Enrichment with plutonium is considered. A bibliography of 100 references is given. Drawings are ...

The major research objectives of this project included the formulation of flow and heat transfer modeling framework for the analysis of flow-induced instabilities in advanced light water nuclear reactors such as boiling water reactors. General multifield ...

The expected schedule of work for the development and construction of a British nuclear-powered merchant vessel is described briefly. Two reactor systems were selected for development: the Vulcain advanced pressurized-water reactor and the Integral Boiling Reactor. The history of nuclear power for merchant ships in Britain and other countries is ...

The objective of this collaboration between four institutions in the US and Korea is to demonstrate a technical basis for the improvement of the corrosion resistance of zirconium-based alloys in more extreme operating environments (such as those present in severe fuel duty,cycles (high burnup, boiling, aggressive chemistry) andto investigate the feasibility (from the point of ...

We examine the motion of a high-pressure aqueous solution, through a low-permeability fracture, towards a low-pressure well. As the liquid decompresses in the fractures it expands, and for sufficiently high initial temperature the liquid reaches the boiling point. A vaporization front then develops, so that vapour issues from the well. As the fluid evaporates near the well, ...

At present, the advanced light water reactors (ALWRS) in the United States are being designed to remove reactor decay heat for a period of 72 h following a postulated loss-of-coolant accident (LOCA). The water in the pools external to the containment is evaporated or boiled off to remove the decay heat. It is presumed that the water in the pools can be ...

Commercial refractories of alumina, magnesia, zirconia, and silica, as well as samples of graphite, thoria, beryllia, boron carbide, and quartz, were tested for compatibility with high-temperature and boiling sodium. Samples were exposed either to static sodium at 850/sup 0/C for five hours or to boiling sodium for about an hour. Graphite, thoria, ...

Because of its practical importance and various industrial applications, the process of subcooled flow boiling has attracted a lot of attention in the research community in the past. However, the existing models are primarily phenomenological and are based on correlating experimental data rather than on a first-principle analysis of the governing physical phenomena. Even ...