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:
as follows: A. PWR designs and related operating procedures should have a means of providing at least two available or operable means of adding inventory to the RCS that are in addition to pumps that are a part of the normal decay heat removal systems. These means should include at least one high pressure injection pump from the ECCS. B. The water addition rate provided by each of the means should be at least sufficient to keep the core covered. C. Procedures should be provided for use of these systems during loss of decay heat removal events. The path of water addition must be specified to assure the flow does not bypass the reactor vessel before exiting any opening in the RCS. 30. The reviewer verifies that the applicant has reviewed their ECCS design configurations to identify any unisolable piping connected to the RCS that could be subjected to temperature distributions which would result in unacceptable thermal stresses. This review should consider the potential for thermal stratification, thermal cycling and thermal fatigue given the ECCS piping configurations. The reviewer verifies that appropriate action has been taken, where such piping is identified, to ensure that the piping will not be subjected to unacceptable thermal stresses. The review focuses on ECCS configurations; reviewing the stress analysis and ensuring the stresses are in compliance with the ASME code is performed under SRP Section 3.9.3. 31. For review of a DC application, the reviewer should follow the above procedures to verify that the design, including requirements and restrictions (e.g., interface requirements and site parameters), set forth in the final safety analysis report (FSAR) meets the acceptance criteria. DCs have referred to the FSAR as the design control document (DCD). The reviewer should also consider the appropriateness of identified COL action items. The reviewer may identify additional COL action items; however, to ensure these COL action items are addressed during a COL