Document: NUREG-0800
Document ID: 7a841760-7020-433b-b182-63af2e6f5e72
Document Type: srp
Title: OVERPRESSURE PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340596.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.2
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Reactor Systems Branch (SRXB) Secondary - None I. AREAS OF REVIEW A. Overpressure protection for the reactor coolant pressure boundary (RCPB), during power operation of the reactor, is ensured by application of relief and safety valves and the reactor protection system. For boiling water reactors (BWRs), the area of review includes relief and safety valves on the main steam lines and piping from these valves to the suppression pool. For pressurized water reactors (PWRs), the area of review includes pres- surizer relief and safety valves and the piping from these valves to the quench tank, on the primary and steam generator relief and safety valves on the secondary. The adequacy of the proposed preoperational and initial startup test programs is examined as a part of this review. The reviewer also evaluates the proposed technical specifications to assure that they are adequate with regard to limiting conditions of operation and periodic surveillance testing. B. Overpressure protection for the RCPB, during low temperature operation of the plant (startup, shutdown), is ensured by the application-of pressure relieving systems that function during the low temperature operation. For PWRs the area of review includes relief valves with piping to the quench tank, the makeup and letdown system, and the RHR system which may be operat- ing when the primary system is water solid. For BWRs, no special area of review is required since BWRs never operate in water-solid conditions. Rev. 2 - November 1988 USNRC STANDARD REVIEW PLAN Starndard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. These documents are made available to the public as part of the Commission's policy to Inform the nuclear Industry and the general public of regulatory procedures and policies. Standard review plans are not substitutes for regulatory