PSAM 16 - Paper Overview

PSAM 16 Conference Paper Overview

Welcome to the PSAM 16 Conference paper and speaker overview page.

Lead Author: Jun Qi Co-author(s): Yi Zou yi.zou@lr.org Johan Sörman Johan.Sorman@lr.org

Presenter of this paper: Johan Sorman (johan.sorman@lr.org)

CNNP Trip Monitor
Following the implementation of risk monitors at nuclear stations in China, the concept of trip monitor was developed by the CNNP and Lloyd´s Register. This paper outlines the findings in a project for developing a trip monitor to accommodate the implementation of a trip monitor at Qinshan nuclear stations, mainland China. The criteria on a trip monitor is different to that of a risk monitor where the Probabilistic Safety Assessment (PSA) using Fault Tree and Event Tree analysis constitutes the basis and can as such be readily used for the purpose. A trip monitor requires building a new Fault Tree and Event Tree model with focus on representing availability for systems required for production. In China, a lot of work in reducing the frequency of unplanned shutdown has been done. These efforts are carried out from a qualitative point of view, but there is little work to assess the risk of unplanned shutdown from a quantitative point of view. With this background, CNNP and LR developed a trip monitor for Qinshan II, the first application in China to evaluate the risk of trip for a nuclear power plant from the point of view of quantitative analysis. The work includes software development, model development and verification of the rationality of the results. • Software development o New algorithm for frequency calculation o Modification of the graphical user interface • Model development o Developed Unit 1 trip monitor model as pilot o 7 model developers, 6 senior operators and 1 operator o Lasted for 4 years, a large number of data have been consulted in the process of development. • Results verification o Is the trip risk value quantified reasonable?  According to the operation history of the target unit, compare with the average unplanned shutdown frequency from 2012 to 2018. o Are the components analyzed in the model relevant?  The shutdown events of similar units (M310 units) in China from 2002 to 2018 are compared and analyzed.  Ranking of component importance

CNNP Trip Monitor

Following the implementation of risk monitors at nuclear stations in China, the concept of trip monitor was developed by the CNNP and Lloyd´s Register. This paper outlines the findings in a project for developing a trip monitor to accommodate the implementation of a trip monitor at Qinshan nuclear stations, mainland China. The criteria on a trip monitor is different to that of a risk monitor where the Probabilistic Safety Assessment (PSA) using Fault Tree and Event Tree analysis constitutes the basis and can as such be readily used for the purpose. A trip monitor requires building a new Fault Tree and Event Tree model with focus on representing availability for systems required for production. In China, a lot of work in reducing the frequency of unplanned shutdown has been done. These efforts are carried out from a qualitative point of view, but there is little work to assess the risk of unplanned shutdown from a quantitative point of view. With this background, CNNP and LR developed a trip monitor for Qinshan II, the first application in China to evaluate the risk of trip for a nuclear power plant from the point of view of quantitative analysis. The work includes software development, model development and verification of the rationality of the results. • Software development o New algorithm for frequency calculation o Modification of the graphical user interface • Model development o Developed Unit 1 trip monitor model as pilot o 7 model developers, 6 senior operators and 1 operator o Lasted for 4 years, a large number of data have been consulted in the process of development. • Results verification o Is the trip risk value quantified reasonable?  According to the operation history of the target unit, compare with the average unplanned shutdown frequency from 2012 to 2018. o Are the components analyzed in the model relevant?  The shutdown events of similar units (M310 units) in China from 2002 to 2018 are compared and analyzed.  Ranking of component importance

Paper YI78 Preview

Author and Presentation Info

A PSAM Profile is not yet available for the lead author.
Presenter 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

PSAM 16 Conference Paper Overview

Welcome to the PSAM 16 Conference paper and speaker overview page.

Paper YI78 Preview

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