The use of probabilistic safety assessment (PSA) in the assessment of risk and the improvement of safety for nuclear power plants follows clear international methodologies and has provided significant benefits in the past decades. However, there are also significant challenges in conducting PSA for reactors of singular designs.
The term “reactors of singular designs” is broad and can include: • research reactors; • demonstration reactors; • prototype reactors; • first of a kind (FOAK) reactors; • small modular reactors (SMRs); • Generation IV reactors.
The challenges in developing and assessing PSAs for reactors of singular designs were discussed at the 2020 WGRISK annual meeting, during which a proposal for a task was developed. The primary activities of the task were to hold an international symposium and to produce a summary report of the proceedings. The International Atomic Energy Agency (IAEA) requested to join the task and for a joint symposium to be held.