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Webinar on Technical Safety Review (TSR): A key IAEA Peer Review mission for current nuclear power reactors and SMRs

Date and time

Wednesday 13 December 2023

14:00 Vienna time | Duration: 2 hours

Recording → 




The purpose of the webinar is to present the experiences in, and lessons learned from, the implementation of recent Technical Safety Review (TSR) peer review services for current nuclear power reactors and SMRs and the usage of this service in support of various needs of Requesting Parties. The webinar will also provide a forum for information exchange among Member States and offer guidance to potential requesting parties.



14:00 – 14:05     Opening remarks – Ana Gomez Cobo, International Atomic Energy Agency

14:05 – 14:25     Overview of TSR service by Martin Gajdos, International Atomic Energy Agency

14:25 – 15:35     Discussions from TSRs hosting and requesting parties:

  • TSR-PSA as a tool for independent review of the updated Probabilistic Safety Assessment for Kozloduy NPP Unit 5 and 6  by Emil Stefanov, Kozloduy NPP, Bulgaria
  • Experiences from the TSR-PSR of Koeberg NPP Periodic Safety Review Documentation by Bravance Mashele, ESKOM, South Africa
  • Experiences with and the usage of results from the TSR-PSA Probabilistic Safety Assessment Study for Laguna Verde NPP to enhance regulatory body’s capabilities by Ramon Lopez, CNSNS, Mexico
  • Foreseen benefits of the TSR-DS service in support of the development and licensing of the Rolls-Royce Small Modular Reactor in the UK by Mark Salisbury, Rolls-Royce SMR Ltd., United Kingdom. 

15:35 – 15:45    Main Administrative Steps of and How to Request TSR peer reviews by Jorge Luis Hernandez, International Atomic Energy Agency

15:45 – 16:00    Q&A Session


Guest speakers

Emil Stefanov, Head of PSA Section, Kozloduy NPP, Bulgaria

Emil Stefanov, has worked for more than 25 years in nuclear power plants’ operation. He is an electrical engineer and has worked at various positions at Kozloduy NPP, Bulgaria in the past including holding a position of the chief expert for electrical equipment.

Emil is currently Head of PSA Section within Kozloduy NPP’s Technical Support Division and he is also a member of WANO’s International Equipment Reliability Working Group (IERWG).

Bravance Mashele, Senior Manager Nuclear Engineering, Eskom, South Africa 

Bravance Mashele works within the Generation Division at Eskom in the Nuclear Operating Unit (NOU), focussed on long-term operation of the NPP.  Within Nuclear Engineering her role is mainly concerned with safety assessments and analyses, plant life cycle management, and maintaining of design basis documentation (such as the safety analysis report), and long-term planning for sustainable operations.  Before the current role, Bravance has been in various managerial positions within the NOU including systems engineering, work management, and plant engineering. 

Bravance has 19 years of nuclear power plant design and operations experience and is a professionally registered engineer with Engineering Council of South Africa.

Ramon Lopez Morones, Technology Director, CNSNS, Mexico

Ramón López M. has worked for over 20 years at the Mexican nuclear regulatory body. Ramon began his career as a risk analyst, contributing to the development of the Probabilistic Risk Analysis of Laguna Verde NPP of the regulatory body, for regulatory purposes and as a reviewer of the Individual Plant Examination of LVNPP. Ramon continued his responsibilities as a severe accident analyst using the MELCOR and SCDAPRELAP simulation codes. Currently, Ramon  is in charge of the Technology Direction, a sort of Technical Support Organization for the regulatory body, which consists of two sections: the first focusing on risk management and the second on neutronic, transients, and accidents.

Mark Salisbury, Head of Regulatory Affairs, Rolls-Royce SMR Ltd., United Kingdom

Mark Salisbury, FNucI, FRSC. has worked for around 20 years in new nuclear development and operational nuclear power plants. Mark is a chartered chemist and scientist with a degree in chemistry from the University of Warwick, and a fellow of the Royal Society of Chemistry, UK Nuclear Institute and the World Nuclear University.

Mark is currently Head of Regulatory Affairs for Rolls-Royce SMR in the UK and serves on the Board of the UK Nuclear Institute and is a member of the American Nuclear Society. Mark is actively involved in the IAEA Nuclear Harmonisation and Standardisation Initiative workstreams and serves as the UK representative to the IAEA Light Water Reactors. Technical Working Group.


IAEA presenters

Ana Gomez Cobo, Section Head, Safety Assessment Section, International Atomic Energy Agency

Martin Gajdos, TSR Coordinator, Safety Assessment Section, International Atomic Energy Agency

Jorge Luis Hernandez, Senior Nuclear Safety Officer (NPP Design Safety), Safety Assessment Section, International Atomic Energy Agency


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