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:
the components, instruments, or controls used for overpressure protection and the interfaces with all other systems are identified. The effects of these other functions or systems on operation of the overpressure protection system are determined. For PWRs, failure of the makeup and letdown system or the RHR system is examined to assure overpressure protection during low temperature operation of the plant. 3. The capacities, setpoints, and setpoint tolerances for all safety and relief valves are identified. 1 4. All of the reactor trip signals which occur during overpressure tran- sients, including their setpoints and setpoint tolerances, are identifed. 5. All transients analyzed in Chapter 15 of the SAR that result in an increase in the pressure experienced by the RCPB are examined. The predicted peak pressures are identified and the operating conditions and setpoints used in the analysis are reviewed to assure that they are suitably conservative. 6. The proposed plant technical specifications are reviewed to: a. Confirm the suitability of the limiting conditions of operation, including the proposed time limits and reactor operating restric- tions for periods when system equipment is inoperable due to repairs and maintenance. b. Verify that the frequency and scope of periodic surveillance testing is adequate. IV. EVALUATION FINDINGS The reviewer verifies that the SAR contains sufficient information and the review supports the following kinds of statements and conclusions, which should be included in the staff's safety evaluation report: The staff concludes that the overpressurization protection system is acceptable and meets the relevant requirements of GOC 15 and 31 and Appendix G to 10 CFR Part 50. This conclusion is based on the following: 1. BWRs The overpressure protection system prevents overpressurization of the reactor coolant pressure boundary under the most severe transients and limits the reactor pressure during normal operational transients.