Second meeting of the VVER Regulators Forum Working Group on Regulatory Use of PSA

Second meeting of the VVER Regulators Forum Working Group on Regulatory Use of PSA took place in Helsinki, Finland from 11 to 13 February 2015. The meeting was mainly devoted to: Task 1 – Comparison of current EE PSA approaches & regulations, Task 2 – Fukushima lessons learned for PSA implementation and Task 3 – National risk-informed decision making framework. Within Task 1 PSA WG members made national presentations on national practices in the field of EE PSA. Presented information was discussed within the group and used during discussions on Task 1 questionnaire developed by AERB (India). Within Task 2 NRSC presented results of investigation of available international studies on Fukushima and allowed to come up with the list of PSA related problems associated with Fukushima. During discussions it was decided to create a questionnaire on Task 2 based on presented results. Within Task 3 STUK (Finland) prepared a questionnaire that was circulated between participants for comments. It was agreed that STUK will finalize the questionnaire based on participant’s comments and prepare final version of questionnaire with STUK answers by the next meeting. In addition, VVER Regulatory Forum observers presented topical presentations on Task 1 and 2 related issues:

• The Fault Sequence Analysis Method to Assist in Evaluation of the Impact of Extreme Events on NPPs (IAEA),
• Fukushima lessons learned from PSA. Overview of international activities (e.g. ASAMPSA_E project) (GRS).

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