Draft In-depth Safety Assessment of Rivne NPP Unit 1 – Impact of Limited External Hazards (Fires, Floods, Earthquakes, etc.) – Part 1

Period: 1999 – 2003

Customer: Pacific Northwest National Laboratory (PNNL), USA

Beneficiary: Rivne NPP

The objective of this project was to identify the stability of Rivne NPP Unit 1 against limited extreme external hazards. The first phase of the project was targeted at collecting and handling the initial data necessary to analyze and conduct a qualitative and quantitative identification of the Unit’s vulnerability to extreme external effects. Since not all external impacts were analyzed, the scope of the project was limited.

Within the framework of the project:

• The guidelines for Phase 1 analysis of limited external hazards were developed.
• Personnel of the Rivne NPP received training in probabilistic safety analysis techniques and external hazards analysis procedures.
• Initial data were collected and processed (including the necessary data on the RNPP site, statistical data on extreme effects, etc.).
• Initial (qualitative) identification of the Unit’s vulnerability to extreme external effects was completed.
• A final qualitative and quantitative assessment of Unit’s vulnerability to natural disasters was completed. An action plan was developed and labor costs to complete the probabilistic safety analysis of natural hazards were estimated.
• A final qualitative and quantitative assessment of Unit’s vulnerability to man-made hazards was completed. An action plan was developed and labor costs to complete the probabilistic safety analysis of man-made hazards were estimated.

The project resulted in the development of Part 1 of the final report entitled ‘In-depth Safety Assessment – Impact of Limited External Hazards (Fires, Floods, Earthquakes, etc.)’. The report presents all the information necessary to conduct a probabilistic safety assessment (PSA) for extreme external effects. It includes the results of quantitative and qualitative assessments of the Unit’s vulnerability and identifies the extreme effects that pose the highest potential risk. The report presents a plan for assessing the frequency of RNPP Unit 1 core damage caused by these potentially important extreme effects.

Contact:
Director of Safety Analysis Laboratory
Oleg I. Zhabin
Tel./Fax +38 (044) 559 66 07
e-mail: sal@i.com.ua