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Knowledge and Experience Sharing Workshops

PSA Level 1 and Applications

Read disclaimer

Probabilistic Safety Assessment (PSA) is an effective tool to enhance plant safety, and to operate nuclear facilities in the most efficient manner. However, a PSA that is to be used as a day to day tool for decision making at NPPs has to reflect the actual design and operational features of the plant as accurately as possible, it must be of high quality and has to be subject to strict QA processes. Since the early 80s the IAEA has made a considerable effort to support the development of technical capabilities for PSA in Member States, to write technical procedures for carrying out PSA, and to assist the Member States in reviewing PSA though its IPSART Service (International PSA Review Team). Additionally, current efforts are being devoted to support and promote the appropriate use of PSA methods and results in decision making at the nuclear power plants.

The purpose of this workshop is to provide the participants with basic training on key issues in PSA level 1. The second part of this workshop is dedicated to presentations on low power level PSA and some PSA applications in the design and operational areas.


 PSA and PSA Applications Workshop Manual (88KB)

 Introduction to PSA (34KB)

 The role of PSA in safety management. Risk approach in NS (1846KB)

 IAEA Guidelines for PSA (3565KB)

 QA Programme for PSA (3846KB)

 Documents generated in a PSA project (2407KB)

 Regulatory review of Level 1 PSA (7020KB)

 Initiating Event Analysis (5291KB)

 Accident Sequence modelling (5290KB)

 Key elements of the documentation for the IE definition, success criteria determination and event sequence modelling (2844KB)

 Boolean Algebra and PSA quantification (3717KB)

 System Analysis in a PSA part 1 (4430KB)

 System Analysis in a PSA part 2 (7494KB)

 System Analysis (6461KB)

 Reliability data analysis – use of generic and/or
plant-specific data

 Reliability data analysis, specific aspects (5444KB)

 Human Reliability Analysis (9870KB)

 Dependent failure analysis (3135KB)

 PSA quantification (4715KB)

 Low power and shutdown PSA (4691KB)

 Living Probabilistic Safety Assessment (LPSA) (2998KB)

 Risk/Safety monitors (2988KB)

 Use of PSA to support design and design modifications (2419KB)

 PSA-based evaluation and rating of operational events (5851KB)

 Development and Use of Probabilistic Safety Criteria (2188KB)

 Safety Reports Series No. 25 Review of PSA by
Regulatory Bodies

 IAEA-TECDOC-1101: A framework for a quality assurance
programme for PSA

 IAEA-TECDOC-1106: Living probabilistic safety
assessment (LPSA)

 IAEA-TECDOC-1144: Probabilistic safety assessments for
low power and shutdown modes

 IAEA-TECDOC-1200: Applications of probabilistic safety
assessment (PSA) for NPPs

 IAEA-TECDOC-1267: Procedures for conducting PSA for
non-reactor nuclear facilities

Target group: Staff of utilities, nuclear power plants, regulatory authorities, and support organizations with little or no experience in PSA development, however some of the PSA application subjects might be interesting even for those that have already basic PSA knowledge.
Media: PDF Files


The information contained in these video lectures cannot be changed or modified in any way and should serve only the purpose of promoting exchange of experience, knowledge dissemination and training in nuclear safety. The information presented does not necessarily reflect the views of the IAEA or the governments of IAEA Member States and as such is not an official record. The IAEA makes no warranties, either express or implied, concerning the accuracy, completeness, reliability, or suitability of the information. Neither does it warrant that use of the information is free of any claims of copyright infringement. The use of particular designations of countries or territories does not imply any judgment by the IAEA as to the legal status of such countries or territories, of their authorities and institutions or of the delimitation of their boundaries. The mention of names of specific companies or products (whether or not indicated as registered) does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA

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| Last update: Thursday, 25 August, 2016.