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 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)

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 ...

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 ...

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 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 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 ...

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 ...

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 ...

Organic compounds formation (organic acids, aldehydes and glycols) in the primary circuit of the KS-150 reactor (NPP A-1, Czechoslovakia) is discussed. On the base of the analysis of physical-chemical performances of the moderator and coolant it is establ...

transition in GaAlAs layers with 18% and 36% A1 respectively. The relapive values for the compositions

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 ...

... so that the EVC build-up can be removed from reactor walls. ... average molecular weight > 1000 that would limit penetration through cell membranes. ...

Decommissioning of the NPP A-1 in Jaslovske Bohunice is encountered with great variation of the problems connected primarily with the high radiation fields and the high activity of the contaminated materials. Decontamination of the contaminated objects and the thorough radiological protection of decontamination workers are therefore ...

Declassified 26 Nov 1973. The reactor kinetics parameters of the Tory IIA-1 reactor determined in the high power performance test are discussed. The observed characteristics are compared with values predicted by neutronic calculations. (JWR)

For assessments of hard-to-detect radionuclides (HD-RN) contents in various type of radwastes at the NPP-A1, available empirical data referenced to 137Cs (actinides, 90Sr, 99Tc, 63Ni, 14C) and the theoretical assessment for the remaining HD-RN using calculated RN inventory and a simple model with effective relative (137Cs) spent fuel release fractions was applied. The analytical data of extended ...

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 ...

Problems encountered in getting underway and installation of a non- Government system for physical start-up and physics experiments are discussed. Work and experiments on the KS-150 reactor of the First Czechoslovakian Nuclear Power Station A-1 and on reactor TR-0 for the A-1 are described. Possible ...

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 ...

Mark 16 U-A1 alloy production fuel tubes and six special U(sub 3)O(sub 8)-A1 powder metallurgy (PM) test assemblies were successfully irradiated in P-7 reactor charge beginning December 1976. A year after irradiation, the outer surfaces were inspected und...

At the beginning of the first quarter of 1981, the Shippingport Atomic Power Station was operating with the 1A, 1B, 1C, and 1D reactor coolant loops and the 1AC and 1BD purification loops in service. The 1A, 1B, and 1C 991 psig self-actuated steam relief ...

Also, due to the high velocity of. 1 a@. 1 v2 2- ' where R , = infinite medium mean life time of neuti>on = il n - $ 2 where T = reactor period = - - - . ...

... Photochemical Reactor at 350 nm. The chlorinated polymer was ... minutes, and 1.08 mL (1 mmol) of C2 H5 A1CI2 in hexanes was added. ...

... introduce a new semiconducting material for evaluation. ... temperature AlGaN source materials was separated ... A1GaN layers in an GSMBE reactor? ...

No oxidation tests were run. Rather, a catalytic oxidation reactor design was formulated by SRC to process the output .... METAL GASKET A. 1-7/8 in ...... Water is removed by condensation, followed by carbon dioxide removal. ...

This artist's concept from 1963 shows a proposed NERVA (Nuclear Engine for Rocket Vehicle Application) incorporating the NRX-A1, the first NERVA-type cold ...

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 ...

It has recently been reports that Table A.1 of Attachment 1 of DOE STD-1027-92 is being improperly used to determine the Category 3 inventory threshold values for non-reactor nuclear facilities. The concern of this paper is that Safety Analysts and Facility Managers at the Lawrence Livermore National Laboratory (LLNL), as well as at ...

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 ...

The pressure vessel of the Czechoslovakia A1 power reactor is supported by a skirt designed in the shape of a diverging cone. The area where the skirt is welded to the pressure vessel head is subjected to strong temperature stresses during startup and shutdown. Three separate institutions performed calculations to determine the ...

T;c Reaction rate kg NH3 kg cat.sec. , Dispersion coe cient due to nite heat transfer 1 sec. The heat exchanger for the reactor is then gs = CsI , A,1B. The model was analyzed using MATLAB. 2.3 Simulations of limit cycle marked with 'X' on the gure. As k is increased towards in nity corresponding to increased heat transfer

The MELCOR computer code is being used as the point of departure to develop an integrated severe accident analysis computer code for the heavy-water moderated U-Al fuel reactors. The resulting computer code (MELCOR/SR) provides a practical and comprehensive analytical tool for evaluating severe accident behavior in the Savannah River Site (SRS) production ...

The methods used to measure the irradiation levels and the radiation exposure of personnel of the RA-1 reactor are described. The criteria used to evaluate the risks from this exposure are reported. Typical graphs are shown of the radiation levels measured in the control room. (J.S.R.)

The most important research carried out at the Nuclear Research Institute in connection with construction and testing of the first Czechoslovakian A-1 nuclear power station is described. Attention is given to the physical tests on the KS-150 reactor and cooperation in studies on the radiation stability of the fuel elements. ...

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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 ...

There are no dnta on large-scale nuclear war. Nuclear weapons have been fired and most of our solid information about fallout is associated with such firings. Information a1so exists concernlng gaseous or particulate release from atomic energy plants in normal operations. Information has been developed on the behavior of ...

Water hammer in nuclear power plants is an unresolved safety issue under study at the NRC (USI A-1). One of the identified safety concerns is steam generator water hammer (SGWH) in pressurized-water reactor (PWR) plants. This report presents a summary of:...

equations in the fields of reactor physics, hydrodynamics, magnetohydrodynamics, control processes, etc. ...... Laurent Schwartz has developed a theory of such ...... to identify A1 with L = - c a - + b, and v(u) and +(u) should ...... satisfying I [St I Il 2 M. Let XE.X and define I I I [ , by ...

Synthesis of nanocrystalline powders of SiC, A1N, Si Si3N4, TiN, TiC, TiO2 have been achieved by a non thermal microwave plasma reactor from vapor phase precursors. In the case of TiO2 the phase can be a metastable high pressure plasma (Beta-TiO2). Nanopa...

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

At the beginning of the third quarter of 1982, the Shippingport Atomic Power Station was operating with the 1A, 1B, 1C, and 1D reactor coolant loops and the 1AC and 1BD purification loops in service. On October 1, 1982, the Shippingport Atomic Power Stati...

At the beginning of the second quarter of 1982, the Shippingport Atomic Power Station was operating for Duquesne Light Company system grid at maximum base load with the 1A, 1B, 1C, and 1D reactor coolant loops and the 1AC and 1BD purification loops in ser...