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Determination of the safety importance of systems of the Tehran research reactor using a PSA method

Ghofrani, M. B ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. DOI: 10.1016/S0306-4549(02)00018-X
  3. Publisher: 2002
  4. Abstract:
  5. This paper presents the results of a research project performed to study the ranking of systems and components of the Tehran research reactor, important to safety, using a level 1 probabilistic safety assessment (PSA). The occurrence of an imbalance condition, i.e. a lack of equilibrium between heat generation and heat removal without reactor scram, was defined as the "Top Event". A fault tree technique was used to study all scenarios leading to the top event, the probability of which was shown to be 9.5E-5. It has been concluded that, objects falling onto the reactor core; operator error to shutdown the reactor while safety flapper open; and simultaneous opening of water outlet valves, are the most important initiating events. The results of this study led to some back-fittings in the reactor sub-systems. © 2002 Elsevier Science Ltd. All rights reserved
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  8. Source: Annals of Nuclear Energy ; Volume 29, Issue 16 , 2002 , Pages 1989-2000 ; 03064549 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S030645490200018X