The test program for the Bohunice A-1 Reactor is described and the test results to date are summarized, (JWR)

The reactor control and protection systems for the Bohunice A-1 reactor are described. The testing of the systems is reviewed and the systems' performance during the initial reactor startup is discussed. (JWR)

The extensive preparatory work preceding the startup of the Bohunice A-1 Reactor is described. The technical problems encountered during the reactor startup are discussed. (JWR)

Activities associated with the startup of the Bohunice A-1 Reactor are summarized. The reactor physics parameters obtained during the approach to initial crtticality are presented. (JWR)

The status of power reactor development in Czechoslovakia is surveyed. The development of the KS-150 reactor for the Bohunice station is described and current work on PWR type reactors is reviewed. Work aimed at future development of fast breeder reactors is briefly examined. (JWR)

The fuel elements of the Bohunice A-1 reactor are replaced continuously during full power operation. The design of the charging machine for the refueling operation is described, The experience gained from charging machine testing is discussed. (JWR)

Steam generators of four VVER-440 units at nuclear power plants V-1 and V-2 in Jaslovske Bohunice (Slovakia) were gradually changed by new original "Bohunice" design in period 1994-1998. Corrosion processes before and after these design and material changes in Bohunice secondary circuit were studied using M�ssbauer spectroscopy ...

The organization of nuclear activities in Czechoslovakia is surveyed, and the nuclear power program is described. A description is given of the 150- Mw(e) KS-150 D/sub 2/Omoderated gas-cooled power reactor at Bohunice. The fuel elements, pressure vessel, and construction of this reactor are discussed. Other nuclear research ...

The state of art and the development trends of the safety of power reactors in the world are briefly reviewed and the Bohunice actor safety based on the postulate of the extreme initiating events is proposed and applied, different accident conditions are analyzed in detail, and the probability of their occurrence during the ...

Radiocarbon variations in the atmospheric CO(2) with attenuating amplitudes and decreasing mean values with typical maxima in summer and minima in winter have been observed since 1967 in two localities of Slovakia, in Bratislava and Zlkovce, situated about 60 km NE from Bratislava, only 5 km from the Bohunice Nuclear Power Plant (NPP). The (14)C record in Bratislava has been ...

Many decontamination methods have been developed for the decommissioning of the NPP A-1. In the last few years, the activities have been directed mainly at trials and applications of the developed methods in dismantling tasks. Decontaminated are steel for free release, also tanks and circuits containing sludge and deposits with high contents of radionuclides. The combination of decontamination ...

An advanced, workstation based, nuclear power plant simulator has been developed for use in training the operational staff of the Bohunice Nuclear Power Plant. This training simulator uses state-of- the-art computer hardware and software and provides the capability to simultaneously include six members of the power plant operating staff in the training sessions. A detailed ...

Steam generators of four VVER-440 units at nuclear power plants V-1 and V-2 in Jaslovske Bohunice (Slovakia) were gradually changed by new original ``Bohunice'' design in the 1994-1998 period. Corrosion processes before and after these design and material changes in Bohunice secondary circuit were studied using M�ssbauer spectroscopy ...

Four types of surveillance programs were (are) realized in Slovak NPP's: 'Standard Surveillance Specimen Program' (SSSP) was finished in Jaslovske Bohunice V-2 Nuclear Power Plant (NPP) Units 3 and 4, 'Extended Surveillance Specimen Program' (ESSP), was prepared for Jaslovske Bohunice NPP V-2 with aim to ...

In the Slovak Republic the sources of radioactive waste include the operation of the Mochovce and Bohunice nuclear power plants, decommissioning activities currently carried out and/or planned at Bohunice and elsewhere, as well as the use of radioactive sources in research, industry, and medicine. Pursuant to the Slovak policy low and intermediate level ...

The first (pilot) nuclear power plant A1 in the Slovak Republic, situated on Jaslovske Bohunice site (60 km from Bratislava) with the capacity of 143 MWel, was commissioned in 1972 and was running with interruptions till 1977. A KS 150 reactor (HWGCR) with natural uranium as fuel, D2O as moderator and gaseous CO2 as coolant was installed in the A1 plant. ...

The specific problems are discussed of metrological testing of in-service measuring instruments at the Jaslovske Bohunice nuclear power plant. Care of these instruments takes place in three stages. The departments of basic operations are responsible for t...

Details are given of an intercomparison of some environmental monitoring methods applied at nuclear power plants in Czechoslovakia (Bohunice) and in Hungary (Paks). Soil and grass samples were analysed by gamma-spectrometry, flame photometry and by chemic...

The paper describes the way and results of human reliability data analysis collected as a part of the Bohunice Simulator Data Collection Project (BSDCP), which was performed by VUJE Trnava, Inc. with funding support from the U.S. DOE, National Nuclear Security Administration. The goal of the project was to create a methodology for simulator data collection and analysis to ...

... of a gas-cooled fast reactor (A-2, B-2). More recently. Brookhaven researchers (BI, L-1)(in conjunction with their designs for space reactors) have ...

The control rod drive mechanism for the RA-2 Reactor is briefly described. It consists of a motor transmitting motion across an electromagnetic couple to the rack and pinion gear. The control circuit for the rod position is given. (J.S.R.)

... shelters and in the nuclear energy industry in reactor containment ... Bauer and Calder [11] have results showing ... Dideon �--a 2 pt ln(1 + a3 v2) ...

The separate effect UPTF TRAM Test A2 consisting of six runs was designed to investigate flow regimes in the hot leg of a pressurized water reactor under two-phase natural circulation conditions. In particular, the following phenomena were investigated: -...

This Report of the IAEA Assessment of Safety Significant Events Team (ASSET) presents the results of the team's review of the status of implementation of the recommendations made by the 1988 ASSET mission to Bohunice nuclear power plant in Slovakia, and o...

Reported are radiation protection aspects of operation of nuclear power plant Bohunice. Measures adopted for protection of personnel during physical and energetic start-up of the atomic station are described. The gamma and neutron radiation fields in various areas of the plant are evaluated and surveys of personal doses, radioactive contamination of the cooling gas ...

Radiocarbon variations in the atmospheric CO(2) have been observed at two localities in Slovakia (Bratislava and Zlkovce). Zlkovce is situated about 60 km NE from Bratislava, and only 5 km from the Bohunice Nuclear Power Plant (NPP). The observed Delta(14)C levels provide a unique evidence of the long-term impact of the Bohunice NPP on the Bratislava ...

The BILKO Model was used to optimize the development of nuclear energy systems for electricity generation. The systems included both thermal and fast reactor power plants. Questions concerning the external fuel cycle are also considered. (Atomindex citati...

A2.06-9041 (SBIR 2007-1) A Multi-Physics CFD Toolkit for Reentry Flows ... X8.03 -9658 (SBIR 2007-2) Autonomous Control of Space Nuclear Reactors ...

...those acceptance criteria that the Commission found were met under § 52.97(a)(2). If the combined license is for a modular design, each reactor module may require a separate finding as construction proceeds. (h) After the Commission has...

The dissertation deals with sorption and desorption characteristics of two significant radionuclides Sr-85 and Cs-137 in selected soil samples as well as from a round of NPP Bohunice and NPP Mochovce which were examined. The dissertation consists from nex...

The radioactive waste treatment and conditioning are the most important steps in radioactive waste management. At the Slovak Electric, plc, a range of technologies are used for the processing of radioactive waste into a form suitable for disposal in near surface repository. These technologies operated by JAVYS, PLc. Nuclear and Decommissioning Company, PLc. Jaslovske Bohunice ...

Operational benefits and enlarged functionality of modern technology, but also the physical and the technological aging of conventional instrumentation and control (I and C) systems, are motivations for modernization of I and C systems in nuclear power plants (NPPs). In case of safety-relevant I and C systems, the licensing authorities require the demonstration of sufficient safety of the ...

Axions were sought at the IBR-2 pulsed reactor by means of plastic scintillation counters with a total scintillator volume of 139 liters. The upper limit obtained for the counting rate is at least a factor 1300 less than the value predicted by the theory of a standard axion in the mass range m/sub a/<2m/sub e/.

The Al-Pu alloy capsules undergoing tests in the MTR and the KER in-pile loop are discussed. The first full-size Mark 1-B, 19-rod cluster assembly has been and pressure drop tests. Irradiation of UO/sub 2/ in the MTR is discussed. The tests being performed on the Plutonium Recycle Reactor Experiment coolant system period see HW-57636 ...

Liquid crystal materials processing Equipment 1. Design of reactors for specific processes 2. Clustering of processes in integrated tools 3. Tool simplification - multi-use reactor designs 4. Equipment- and process-related defect sources 5. Ultraclean process equipment Technology Modeling - heat, momentum, chemical species 1. Tool scale modeling of process ...

This report describes computational benchmark models for nuclear criticality derived from descriptions of the Systems for Nuclear Auxiliary Power (SNAP) Critical Assembly (SCA)-4B experimental criticality program conducted by Atomics International during the early 1960's. The selected experimental configurations consist of fueled SNAP 10A/2-type ...

In this study, two pilot-scale aerobic landfill reactors with (A1) and without (A2) leachate recirculation are used to obtain detailed information on the quantity and quality of leachate in aerobic landfills. The observed parameters of leachate quality are pH, chloride (Cl?), chemical oxygen demand (COD), biological oxygen demand ...

In a long-term study of contaminated soil around Jaslovsk� Bohunice nuclear power plant (NPP), 24 species of local flora were used to show impact of serious accidents from 1976 to 1977. The 19-km-long banks of the Jaslovsk� Bohunice NPP wastewater recipient have been identified as contaminated by (137)Cs. In total, more than 67,000m(2) of riverbanks ...

The ORR operated at an average power level of 29.7 MW for 85.3% of the time during this period. The reactor was shut down on fifteen occasions, nine of which were unscheduled. Reactor downtime needed for refueling and checks was normal. The reactor remained available for operation 88.3% of the time. Special tests completed during the ...

In this study, a pilot scale anaerobic-anoxic-oxic (A2O) process with submerged membrane (MBR) in the oxic tank was coupled with thermophilic aerobic digestion (TAD) reactor and was operated for longer than 600 days to treat real domestic wastewater. Regardless of the varying conditions of the system, the A2O-MBR-TAD process removed ...

The removal rates of organics and nutrients in municipal wastewater were examined using a laboratory-scale Anaerobic/Anoxic/Oxic (A2O) process modified with fiber polypropylene media at different operational conditions. The system demonstrated excellent performance with the removal rates of chemical oxygen demand (COD), total nitrogen (TN) and total ...

Session / Plenary Session 1 1A1 T. Yano, E. Greenspan Group Photo Parallel Session 2A2: N. Takaki, J Emission Constraint Effects 16:00-16:20 #86 N. Takaki (Tokyo Tech) Potential role of CANDLE reactor

Nickel is known to be both toxic and carcinogenic, but has also been shown to be nutritionally essential for chicks and rats. The accurate determination of nickel at the trace level, however, is difficult in nutritional-, environmental-, and energy-related matrices. Since the NBS reactor (NBSR) was constructed specifically to provide a highly thermalized neutron environment, ...