5.2
(3) There are two alternative methods of undertaking safety analyses
for nuclear power plant, namely the Design Basis Accident (DBA) approach and the Probability/Consequence approach (Event or Fault Tree Analysis Method). These two methods are in no way contradictory or incompatible but can supplement each other. The Event or Fault Tree Analysis method as applied to nuclear power plant has been developed during the 1970's and while it is still being refined, it is receiving increased attention in many countries. Most countries operating nuclear power stations still, however, rely mainly on the DBA approach for licensing though are making increasing use of the Event or Fault Tree Analysis method.
the
The method of safety analysis that will be used for Guangdong Nuclear Power Station will draw on the experience existing in other countries at the time licensing is undertaken is Guangdong. At the present time it is envisaged that the method adopted will mainly be based on the DBA approach, with use of the Event or Fault Tree Analysis me thod to give additional verification that there will be no unacceptable risks to the environment.
(4) The joint utility will take responsibility for the safety of the nuclear power station under the guidance and inspection of the relevant authorities of the People's Republic of China.
1
In order to ensure correct implementation of safety requirements, the Guangdong Nuclear Power Station Company must submit safety reports. It is proposed that, separate safety analysis reports corresponding to the various phases of the construction programme be prepared and submitted to the relevant Chinese authorities for approval. Approval of the preliminary safety analysis report (PSAR) must precede the start of work on the foundations for the reactor building, approval of an Intermediate Safety Analysis Report (ISAR) must must precede initial fuelling of the reactor and a final safety analysis report (FSAR) must be approved by the authorities prior to commercial loading.
Conclusions
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Since the Guangdong nuclear power station will be a PWR, it is appropriate to refer mainly to the Safety Standards concerning design, construction and operation of those countries who have built and operated PWR power stations. In addition, because of the participation of CLP and GPC in the project, it is important to give sufficient consideration to the concerns about nuclear power plant safety that may be expressed in Hong Kong and Guangdong and reference will be made to the useful experience which is currently being gained within the United Kingdom on the assessment of the safety of PWR plant. Particular attention will also be paid to IAEA and ICRP recommendations.
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