Nuclear Energy Agency Committee on the Safety of Nuclear Installations
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چکیده
A comprehensive program for the evaluation and enhancement of seismic safety of the Paks Nuclear Power Plant was started in 1993 and now is in progress. In the first two years of the program the urgent and quickly realizable fixes were performed, seismic instrumentation was installed, and a procedure was elaborated for the activities to be performed after a possible earthquake. Re-evaluation of the site seismic hazard was finished in 1996. The adequacy of the evaluation was approved by micro-seismic monitoring results in 1998. A concept has been established for the safe shutdown and cooling-down of the reactor core, which is based on reinforcement of systems and minimizing system modifications. The systems, equipment and structures relevant for seismic safety have been determined on the basis of this concept. Seismic re-qualification of the main part of the equipment and structures has been completed, now design and implementation of the reinforcements is in progress. Essential part of upgrades is already implemented. A level 1 seismic PSA has been started for the quantitative characterization of plant safety achieved after implementation of upgrading measures and for the confirmation of the safety concept and plant actions in case of earthquake. The programme has to be finished by the end of 2002. The paper gives an overview of the seismic safety evaluation and enhancement program for the Paks NPP. The specific aspects of the re-evaluation and upgrading are discussed in details.
منابع مشابه
Nuclear Energy Agency Committee on the Safety of Nuclear Installations Proceedings of the International Workshop Building the New Hra: Errors of Commission from Research to Application
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