PSAM 16 Conference Paper Overview
Welcome to the PSAM 16 Conference paper and speaker overview page.
Lead Author: Hayat Chatri Co-author(s): Gunnar Johanson; gunnar.johanson@afconsult.com
Jan Stiller; Jan.Stiller@grs.de
Jeffery Wood; Jeffery.Wood@nrc.gov
| Recent Insights from the International Common Cause Failure Data Exchange (ICDE) Project |
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| Abstract: CCF events can significantly impact the availability of safety systems of nuclear power plants. For this reason, the ICDE Project was initiated by several countries in 1994. Since 1997 it has been operated within the OECD NEA framework and the project has successfully operated over seven consecutive terms (the current term being 2019-2022). The ICDE Project allows multiple countries to collaborate and exchange common-cause failure (CCF) data to enhance the quality of risk analyses, which include CCF modelling. Because CCF events are typically rare, most countries do not experience enough CCF events to perform meaningful analyses. Information combined from several countries, however, have yielded sufficient data for more rigorous analyses. The ICDE project has meanwhile published eleven reports on collection and analysis of CCF events of specific component types (centrifugal pumps, emergency diesel generators, motor operated valves, safety and relief valves, check valves, circuit breakers, level measurement, control rod drive assemblies, heat exchangers) and five topical reports on a number of different topics including intersystem common cause failure events while three additional topical reports are under preparation. The ICDE project has changed the view of CCFs a great deal. Many insights would not have been possible to identify without a deep plant data collection and combining information from many sources. For instance, determination of the fact that the most common cause of complete CCFs seems to be human action as a part of operation or design, rather than manufacturing deficiencies, would not have been possible without deep plant data collection and combining of information from many sources. This paper presents recent activities and lessons learnt from the data collection and the results of topical analyses on Pre-initiator human failure events (HFEs). In addition, the objectives and scopes of the ongoing analyses are presented. References [1.] ICDE General Coding Guidelines [NEA/CSNI/R(2004)4], January 2004. [2.] Collection and analysis of common-cause failure of centrifugal pumps [NEA/CSNI/R(99)2], September 1999. Replaced with [NEA/CSNI/R(2013)2], [3.] Collection and analysis of common-cause failure of emergency diesel generators [NEA/CSNI/R(2000)20], May 2000. Replaced with [NEA/CSNI/R(2018)5], [4.] Collection and analysis of common-cause failure of motor-operated valves [NEA/CSNI/R(2001)10], February 2001. Replaced with NEA/CSNI/R(20YY)XX ICDE project: Common-Cause Failures of Motor Operated Valves [5.] Collection and analysis of common-cause failure of safety valves and relief valves [NEA/CSNI/R(2002)19]. Published October 2002. Replaced with NEA/CSNI/R(2020)17 ICDE project: Common-Cause Failures of Safety and Relief Valves [6.] Collection and analysis of common-cause failure of check valves [NEA/CSNI/R(2003)15], February 2003. [7.] Collection and analysis of common-cause failure of batteries [NEA/CSNI/R(2003)19], September 2003. [8.] Proceedings of ICDE Workshop on the qualitative and quantitative use of ICDE Data [NEA/CSNI/R(2001)8], November 2002. [9.] Collection and analysis of common-cause failure of switching devices and circuit breakers [NEA/CSNI/R(2008)01], October 2007. [10.] Collection and analysis of common-cause failure of level measurement components [NEA/CSNI/R(2008)8], July 2008. [11.] Collection and analysis of common-cause failure of centrifugal pumps [NEA/CSNI/R(2013)2], June 2013. [12.] Collection and analysis of common-cause failure of control rod drive assemblies [NEA/CSNI/R(2013)4], June 2013. [13.] Collection and analysis of common-cause failure of heat exchangers [NEA/CSNI/R(2015)11], August 2015. [14.] ICDE Workshop - Collection and Analysis of Common-Cause Failures due to External Factors [NEA/CSNI/R(2015)17], October 2015. Replaced with [NEA/CSNI/R(2020)19 Final Manuscript ICDE Topical Report: Operational Experience on Common-Cause Failures due to External Environmental Factors [15.] ICDE Workshop - Collection and Analysis of Emergency Diesel Generator Common-Cause Failures Impacting Entire Exposed Population, 2015. NEA/CSNI/R(2017)8, August 2017. [16.] Lessons Learnt from Common-Cause Failure of Emergency Diesel Generators in Nuclear Power Plants – A Report from the International Common-Cause Failure Data Exchange (ICDE) Project [NEA/CSNI/R(2018)5], September 2018. [17.] ICDE Project Report: Summary of Phase VII of the International Common-Cause Data Exchange Project NEA/CSNI/R(2019)3, June 2019. [18.] ICDE Topical report: Collection and Analysis of Common-Cause Failures due to Plant Modifications NEA/CSNI/R(2019)4 ; 2019. [19.] ICDE Topical report: Provision against Common-Cause Failures by Improving Testing NEA/CSNI/R(2019)5; 2019. [20.] ICDE Topical report: Collection and Analysis of Multi-Unit Common-Cause Failure Events NEA/CSNI/R(2019)6; 2019. [21.] NEA/CSNI/R(2020)1 Final Manuscript ICDE Topical report. ICDE Topical report: Collection and Analysis of Intersystem Common Cause Failure Events. [22.] Draft. ICDE Topical report: Collection and Analysis of Common Cause Pre Initiator Human Failure Events. |
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Author and Presentation Info
Lead Author Name: Hayat Chatri (hayat.chatri@cnsc-ccsn.gc.ca)
Bio: Hayat Chatri holds a M.Sc. in Nuclear physics from Montreal University, Canada. Hayat is a technical specialist at the Probabilistic Safety Assessment (PSA) and Reliability Division at the Canadian Nuclear Safety Commission (CNSC). Since joining the CNSC in 2008, she has been involved in several projects and activities related to the licensing and the regulatory reviews of reliability analyses and PSA of Nuclear Power Plants. She has also participated in several international activities related to PSA and she represented the CNSC in various international PSA fora (NEA, IAEA, USNRC etc). Prior to joining the CNSC, she worked for Atomic Energy Canada Limited (AECL) as PSA specialist. She began her career at a consulting firm of Hydro-Québec, where she was involved in a variety of reliability and nuclear safety analyses projects.
Country: Canada
Company: Canadian Nuclear Safety Commission
Job Title: Technical Specialist
Bio: Hayat Chatri holds a M.Sc. in Nuclear physics from Montreal University, Canada. Hayat is a technical specialist at the Probabilistic Safety Assessment (PSA) and Reliability Division at the Canadian Nuclear Safety Commission (CNSC). Since joining the CNSC in 2008, she has been involved in several projects and activities related to the licensing and the regulatory reviews of reliability analyses and PSA of Nuclear Power Plants. She has also participated in several international activities related to PSA and she represented the CNSC in various international PSA fora (NEA, IAEA, USNRC etc). Prior to joining the CNSC, she worked for Atomic Energy Canada Limited (AECL) as PSA specialist. She began her career at a consulting firm of Hydro-Québec, where she was involved in a variety of reliability and nuclear safety analyses projects.
Country: Canada
Company: Canadian Nuclear Safety Commission
Job Title: Technical Specialist