Topic: Licensing small modular reactors, should we rely on numbers?
In any Small Modular Reactor (SMR) design, even with many layers of passive safety, there is always a potential level of residual risk of a radiological release following an accident. Therefore, the consequences should be analysed and understood, irrespective of the very low predicted Core Damage Frequency (CDF). This presentation considers several British studies performed at Imperial College London, in collaboration with CRA and Public Health England (PHE). The studies investigate the potential consequences to society following an accident at an SMR using a Level 3 Probabilistic Safety Analysis (PSA).
For this presentation, Hugh Stephenson and Bernat Cirera will discuss the latest findings of the collaborative research projects using the latest Level 3 PSA software code Probabilistic Accident Consequence Evaluation (PACE), developed by PHE. The presentation will also explain the success story of how a modest research project with Imperial College skyrocketed to gain significant international interest from SMR vendors and organisations including the Organisation for Economic Co-operation and Development (OECD) and the International Atomic Energy Agency (IAEA).
Hugh Stephenson BEng (Hons) is a Principal Consultant and CRA’s Operations Manager. He is an experienced PSA engineer specialising in safety and risk consulting and is a highly skilled team leader. He has conducted safety, reliability and human factors assessments for many major clients.
A decade of extensive technical involvement in the development and maintenance of PSA models for the entire Advanced Gas-cooled Reactor (AGR) fleet, as well as UK EPR and non-civil UK nuclear facilities, has resulted in Hugh’s highly detailed knowledge of the plant, safety case and the role of the operator at each UK site.
Hugh has also developed and delivered training courses and workshops to major clients concerning PSA/HFA and use of RiskSpectrum PSA software. Currently, Hugh is involved in projects associated with risk aggregation, PSA applications, digital control and instrumentation and software reliability which includes cyber security.
Bernat Cirera graduated from the Universities of Barcelona and Paris with a European Masters in Nuclear Energy in 2016. He participated in a PSA project whilst at University and built on that experience during a 6 month internship in the PSA department of CNEN (EDF). Bernat joined CRA in January 2017 and has worked on PSA for many stations. He has presented a webinar for the Nuclear Institute regarding the factors affecting SMR risk. Bernat supervises two students at Imperial College who are researching:
The environmental risk of a water cooled SMR.
The environmental risk of a molten salt cooled SMR.
Bernat has collaborated on a paper ‘Emergency Planning Zones for SMRs’ which has been shortlisted for PSAM 2018. He presented at the IAEA’s First Research Coordination Meeting on the Development of Approaches, Methodologies and Criteria for Determining the Technical Basis for Emergency Planning Zone for Small Modular Reactor Deployment in Vienna.
Further information and booking details for the CRA Risk Forum which will be held on 26th and 27thSeptember 2018 at The Cranage Estate, Holmes Chapel Cheshire CW4 8EW UK can be found on our Risk Forum registration page.