Potential issues related to emergency core cooling system strainers performance at boiling water reactors: application to Cofrentes NPP (Spain)

Rubio, Rafael and Jiménez Varas, Gonzalo (2014). Potential issues related to emergency core cooling system strainers performance at boiling water reactors: application to Cofrentes NPP (Spain). "Nuclear Engineering and Design", v. 275 ; pp. 11-16. ISSN 0029-5493. https://doi.org/10.1016/j.nucengdes.2014.04.014.

Description

Title: Potential issues related to emergency core cooling system strainers performance at boiling water reactors: application to Cofrentes NPP (Spain)
Author/s:
  • Rubio, Rafael
  • Jiménez Varas, Gonzalo
Item Type: Article
Título de Revista/Publicación: Nuclear Engineering and Design
Date: August 2014
ISSN: 0029-5493
Volume: 275
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

From the 60s to the 90s, a great number of events related to the Emergency Core Cooling Systems Strainers have been happened in all kind of reactors all over the world. Thus, the Nuclear Regulatory Commission of the USA emitted some Bulletins to address the concerns about the adequacy of Emergency Core Cooling Systems (ECCS) strainer performance at boiling water reactors (BWR). In Spain the regulatory body (Consejo de Seguridad Nuclear, CSN) adopted the USA regulation and Cofrentes NPP installed new strainers with a considerable bigger size than the old strainers. The nuclear industry conducted significant and extensive research, guidance development, testing, reviews, and hardware and procedure changes during the 90s to resolve the issues related to debris blockage of BWR strainers. In 2001 the NRC and CSN closed the Bulletins. Thereafter, the strainers issues were moved to the PWR reactors. In 2004 the NRC issued a Generic Letter (GL). It requested the resolution of several effects which were not noted in the past. The GL regarded to be resolved by the PWR reactors but the NRC in USA and the CSN in Spain have requested that the BWR reactors investigate differences between the methodologies used by the BWRs and PWRs. The developments and improvements done for Cofrentes NPP are detailed. Studies for this plant show that the head loss due to the considered debris is at most half of the limited head loss for the ECCS strainer and the NPSH (Net Positive Suction Head) required for the ECCS pumps is at least three times lower than the NPSH available.

More information

Item ID: 35836
DC Identifier: http://oa.upm.es/35836/
OAI Identifier: oai:oa.upm.es:35836
DOI: 10.1016/j.nucengdes.2014.04.014
Official URL: http://www.sciencedirect.com/science/article/pii/S0029549314002258
Deposited by: Memoria Investigacion
Deposited on: 16 Mar 2016 08:15
Last Modified: 01 Mar 2017 16:29
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