Document: NUREG-0800
Document ID: 80fe9eee-2d6e-4a7e-b7dd-ec23aab2d39f
Document Type: srp
Title: STRATEGIES AND GUIDANCE TO ADDRESS LOSS OF LARGE AREAS OF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1211/ML121110138.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.4
CFR Part: 
CFR Title: 

Content:
THE PLANT DUE TO EXPLOSIONS AND FIRES REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of mitigating strategies. Secondary - Organization responsible for the review of reactor systems. I. AREA OF REVIEW On March 27, 2009, the U.S. Nuclear Regulatory Commission (NRC) amended Title 10 of the Code of Federal Regulations (10 CFR), Part 50, and 10 CFR Part 52 with new requirements (74 FR 13926; March 27, 2009) to address loss of large areas (LOLAs) of the plant due to explosions or fire. Section 50.54(hh)(2) requires power reactor licensees to develop guidance and strategies for addressing the LOLAs of the plant due to explosions or fire. Sections 50.34(i) and 52.80(d) require an applicant to submit a description and plans for implementation of the 19.4-2 Revision 0 – May 2013 guidance and strategies intended to maintain or restore core cooling, containment, and spent fuel pool cooling capabilities under the circumstances associated with the LOLAs of the plant due to explosions or fire as required by Section 50.54(hh)(2) as part of the application for an operating license under Part 50 or a combined license (COL) under Part 52. 1. Specifically, Section 50.54(hh)(2) requires licensees to develop and implement guidance and strategies intended to maintain or restore core cooling, containment, and spent fuel pool (SFP) cooling capabilities under the circumstances associated with LOLAs of the plant due to explosions or fire, to include strategies in the following areas: (i) Fire fighting; (ii) Operations to mitigate fuel damage; and (iii) Actions to minimize radiological release. The requirements in Section 50.54(hh)(2) are based on similar requirements originally found in Section B.5.b of the NRC’s Interim Compensatory Measures (ICM) Order issued February 25, 2002.1 The NRC staff issued guidance to current reactor licensees on February 25, 2005.2 Following issuance of the guidance, the NRC staff conducted inspections at operating reactor sites