Station Blackout and Nuclear Safety

Failure of the on-site power generators concurrent with the loss of offsite power results in lossof all alternate current power sources. This event is known as station blackout. Electrical power from batteriesis assumed to be available within the plant specific cooping period. Failure to restore alternate power withinthe station blackout cooping period results in loss of all instrumentation and control and consequential coredamage. In this paper the results of the analysis of modification of the direct current power system on the safety of theplant is analyzed and presented. The main modification analyzed in the paper is change of interconnectionswithin the battery rack, introduction of boost converters and different cell technology. Reliability of the newbattery configuration and implications on the safety of the plant are assessed with the probabilistic safety assessmentmodel of the nuclear power plant. The obtained results show that improved reliability is obtained for the new battery system. The improvementof the battery system reliability depends on the proposed modification and reliability of the components. Themain advantages of new battery technologies are discussed. Their application in nuclear power plant is recommended.

VOLKANOVSKI Andrija;  PEINADOR VEIRA Miguel; 

2016-07-14

CRC Press

JRC96228

978-1-138-02879-1,   

www.crcpress.com/Safety-and-Reliability-of-Complex-Engineered-Systems-ESREL-2015/Podofillini-Sudret-Stojadinovic-Zio-Kroger,    https://publications.jrc.ec.europa.eu/repository/handle/JRC96228,