Debris Impact on Emergency Coolant Recirculation Workshop Proceedings, Albuquerque NM, USA, 25-27 February 2004: Reassessment of Debris-Ingestion Effects on Emergency Core Cooling System Pump Performance

Author： OECD Nuclear Energy Agency  

Publisher： OECD Publishing

ISSN： 1608-0262

Source： SourceOECD Nuclear Energy, Vol.2004, Iss.15, 2004-10, pp. : 798-843

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Abstract

A study sponsored by the United States (US) Nuclear Regulatory Commission (NRC) was performed to reassess the effects of ingesting loss of coolant accident (LOCA) generated materials into emergency core cooling system (ECCS) pumps and the subsequent impact of this debris on the pumps' ability to provide long-term cooling to the reactor core.1 ECCS intake systems have been designed to screen out large post-LOCA debris materials. However, small-sized debris can penetrate these intake strainers or screens and reach critical pump components. Prior NRC-sponsored evaluations of possible debris and gas ingestion into ECCS pumps and attendant impacts on pump performance were performed in the early 1980s.2 The earlier study focused primarily on pressurised water reactor (PWR) ECCS pumps. This issue was revisited both to factor in our improved knowledge ...

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