Probabilistic Safety Assessment (PSA) Benchmark for Multi-Unit/Multi-Reactor Sites

Closed for proposals

Project Type

Coordinated Research Project

Project Code

I31031

CRP

2147

Approved Date

13 July 2017

Status

3 - Active - Ongoing

Start Date

14 February 2018

Expected End Date

15 February 2022

Participating Countries

Argentina
Canada
China
Finland
Ghana
Hungary
India
Pakistan
Republic of Korea
Romania
Russian Federation
Tunisia
Ukraine
United Arab Emirates

Description

Many nuclear power plants (NPPs), either of the same or of different types, designs, or age, are co-located on a single site. While operators and regulators recognize the potential for multiunit accidents, clearly demonstrated during the Fukushima-Daiichi accident in March 2011, past probabilistic safety assessments (PSA) of NPPs have only estimated the risk arising from damage to one single NPP at a time. This CRP will bring together experts from the Member States with water cooled reactor technologies to utilize, test and further develop their current (or planned) PSA methods and assumptions by conducting, and comparing results of, a meaningful benchmark exercise. The exercise will involve development of Multi-Unit/Multi-Reactor-Type PSA (from here on referred to as MUPSA), based on single-unit PSA available in Member States. The insights gained from the exercise may identify technology solutions to reduce those risk contributors that are specific to multi-unit effects.

Objectives

Promote international collaboration among IAEA Member States through the sharing of expertise and participation in the common benchmark calculations.

Specific objectives

Develop best practice guidance for conducting Level 1&2 multi-unit PSAs.

Identify main risk contributors that delineate multi-unit risks from single-unit risks.

Successfully complete the benchmark exercises and document lessons learned.

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