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Apr 19 – 22, 2022
Vienna, Austria
Europe/Vienna timezone
FR22 starts in Vienna 19 - 22 April 2022 Online Stream:

Development of the Versatile Test Reactor (VTR) Probabilistic Risk Assessment

Apr 20, 2022, 11:28 AM
Vienna, Austria

Vienna, Austria

ORAL Track 2. Fast Reactor Safety 2.2 Safety Design and Analysis


Mr Jason Andrus (Idaho National Laboratory)


The Versatile Test Reactor (VTR) is a fast spectrum test reactor currently being developed in the United States under the direction of the US Department of Energy (USDOE), Office of Nuclear Energy. The mission of the VTR is to enable accelerated testing of advanced reactor fuels and materials required for advanced reactor technologies. The conceptual design of the 300 MWth sodium-cooled metallic-fueled pool-type fast reactor has been led by US National Laboratories in collaboration with General Electric-Hitachi and Bechtel National Inc.

The VTR is utilizing a risk-informed performance-based approach for authorization by the USDOE, derived from recent efforts by the US industry led Licensing Modernization Project (LMP). As part of this methodology, the probabilistic risk assessment (PRA) is a key input into decisions regarding the identification and selection of safety basis events, the safety classification of structures, systems, and components, and the evaluation of the adequacy of defense-in-depth. This paper provides an overview of key factors in the development of the VTR PRA, including applicable USDOE and industry PRA standards, the risk metrics and criteria to be utilized for risk-informed decision-making, and the selected structure of the PRA technical elements. The work reported in this summary is the result of studies supporting a VTR conceptual design, cost, and schedule estimate for DOE-NE to make a decision on procurement. As such, it is preliminary.

Affiliation/Organization Argonne National Laboratory
Speaker's email address
Country/Int. organization United States of America
Speaker's title Mr

Primary authors

David Grabaskas (Argonne National Laboratory) Mr Jason Andrus (Idaho National Laboratory) Yunlong (Jonathan) Li (GE Hitachi Nuclear Energy) Mr Dennis Henneke (GE-Hitachi Nuclear Energy) Matthew Bucknor (Argonne National Laboratory)

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