PSAM 16 Conference Paper Overview
Welcome to the PSAM 16 Conference paper and speaker overview page.
Lead Author: Johan Sorman Co-author(s): Yi Zou, Yi.Zou@lr.org
| Experience from using a tool for analysing the significance of events at nuclear power installations following the NRC Significance Determination Process |
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| The NRC's significance determination process: “The ‘Significance Determination Process’ (SDP) is an organized, planned process to evaluate the risk or safety significance of conditions, events or findings at nuclear power reactors.” The process is described in detail in the publicly available document, NRC Inspection Manual, Manual Chapter 0609. This process is not only used by the NRC, but indeed used by nuclear operators to determine the significance of events as well as providing an engineering understanding of their risk and safety significance. This paper outlines the findings developing and implementing a tool that supports the SDP. The tool provides assistance for all the steps in the SDP process. Events that are found to be of low significance are screened out but stored in the database for documentation purposes. Events that are determined to be of significance are further analysed following the SDP. All details of the events are documented in the tool and based on this information, the impact on risk is quantified using the full PSA model. The results are categorized according to the significance color coding system as outlined in the NRC Inspection Manual: Green: Very low safety significance [Delta]CDF < 1E-6 White: Low to moderate safety significance 1E-6 < [Delta]CDF < 1E-5 Yellow: Substantial safety significance 1E-5 < [Delta]CDF < 1E-4 Red: High safety significance 1E-4 < [Delta]CDF The tool has recently been implemented at a number of nuclear power stations and also licensed for use for the regulator in one of the largest nuclear countries in the world. Experiences from its use and implementation at the nuclear stations and by the regulator will be discussed in the paper. |
Paper JO179 Preview
Author and Presentation Info
Lead Author Name: Johan Sorman (johan.sorman@lr.org)
Bio: Johan Sorman holds a master degree from the Royal Institute of Technology in Stockholm, Sweden. Between 1993 and 1999 he worked as a PSA engineer for the nuclear industry in Sweden. Since 2000 he has been responsible for global sales, marketing and training for RiskSpectrum software.
Country: Sweden
Company: LR RiskSpectrum AB
Job Title: Sales Manager
Bio: Johan Sorman holds a master degree from the Royal Institute of Technology in Stockholm, Sweden. Between 1993 and 1999 he worked as a PSA engineer for the nuclear industry in Sweden. Since 2000 he has been responsible for global sales, marketing and training for RiskSpectrum software.
Country: Sweden
Company: LR RiskSpectrum AB
Job Title: Sales Manager