Document: NUREG-0800
Document ID: eb0ea00d-43e4-45d1-8a5e-4daa4263d2cf
Document Type: srp
Title: EMERGENCY CORE COOLING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550068.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.3
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organizations responsible for the review of the BWR and PWR emergency core cooling system. Secondary - Organizations responsible for the review of other systems and technical areas related to the BWR and PWR emergency core cooling system. I. AREAS OF REVIEW The reviewer reviews the information presented in the applicant's safety analysis report (SAR) regarding the emergency core cooling system (ECCS). The major elements of the review are: The specific areas of review are as follows: 1. The design bases for the ECCS are reviewed to assure that they satisfy applicable regulations, including the general design criteria and the requirements of 10 CFR 50.46 regarding ECCS acceptance criteria. 2. The design basis for the automatic depressurization systems (ADS) are also reviewed for compliance with TMI Action Plan Items and associated guidance. This applies to BWRs and the advanced passive reactors (both PWRs and BWRs). 3. For advanced passive reactors which rely on gravitational head to provide ECCS injection to the RCS, the RCS must be designed with an ADS such that the available gravitational head is sufficient to provide adequate core cooling when depressurized. 4. For advanced reactors which rely on passive safety-related systems and equipment to automatically establish and maintain safe-shutdown conditions for the plant, these passive safety systems must be designed with sufficient capability to maintain safe- 6.3-2 Revision 3 - March 2007 shutdown conditions for 72 hours, without operator actions and without non-safety- related onsite or offsite power. 5. The design of the ECCS is reviewed to determine that it is capable of performing all of the functions required by the design bases. 6. The preoperational and initial startup test programs for the ECCS are reviewed to determine if they are sufficient to confirm the performance capability of the ECCS. The need for special design features to permit the performance of adequate test