Reliability of digital reactor protection system based on extenics

Jing Zhao; Ya-Nan He; Peng-Fei Gu; Wei-Hua Chen; Feng Gao

doi:10.1186/s40064-016-3618-y

Reliability of digital reactor protection system based on extenics

Springerplus. 2016 Nov 10;5(1):1953. doi: 10.1186/s40064-016-3618-y. eCollection 2016.

Authors

Jing Zhao¹, Ya-Nan He², Peng-Fei Gu³, Wei-Hua Chen², Feng Gao²

Affiliations

¹ Shenzhen Institute of Information Technology, Shenzhen, Guangdong China.
² State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Design CO., LTD, Shenzhen, Guangdong China.
³ Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advance-d Nuclear Energy Technology, Tsinghua University, Beijing, China.

Abstract

After the Fukushima nuclear accident, safety of nuclear power plants (NPPs) is widespread concerned. The reliability of reactor protection system (RPS) is directly related to the safety of NPPs, however, it is difficult to accurately evaluate the reliability of digital RPS. The method is based on estimating probability has some uncertainties, which can not reflect the reliability status of RPS dynamically and support the maintenance and troubleshooting. In this paper, the reliability quantitative analysis method based on extenics is proposed for the digital RPS (safety-critical), by which the relationship between the reliability and response time of RPS is constructed. The reliability of the RPS for CPR1000 NPP is modeled and analyzed by the proposed method as an example. The results show that the proposed method is capable to estimate the RPS reliability effectively and provide support to maintenance and troubleshooting of digital RPS system.

Keywords: Extenics; RPS; Reliability; Response time.