Document: NUREG-0800
Document ID: 33a67dd5-21e3-4458-9085-803f75466a73
Document Type: srp
Title: OVERPRESSURE PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070540076.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.2
CFR Part: 
CFR Title: 

Content:
section. The procedures below are used to verify that the initial design criteria and bases have been appropriately implemented in the final design in the final SAR (FSAR). The ASME Code requires the latter report, which is the basis during the review for many of the individual review steps outlined below. The reviewer can use previously reviewed designs as a guide, but must verify that any changes are justified. A. BWRs Operating at Power i. The reviewer examines the piping and instrumentation diagrams to determine the number, type, and location of the SRVs on the BWR RCS main steamlines and on the primary side of any auxiliary or emergency system that interfaces with the RCS. The reviewer also analyzes the functions of other pressure dissipation systems, such as isolation condensers. ii. The reviewer identifies all other functions of the components, instruments, or controls used for overpressure protection and the interfaces with all other systems. This includes any blowdown or heat dissipation systems connected to the discharge side of any pressure-relieving devices such as the suppression pool. The reviewer determines the effects of these other functions or systems on the operation of the overpressure protection system. iii. The reviewer identifies the capacities, setpoints, and setpoint tolerances for all SRVs or other overpressure protection system devices. The reviewer verifies that these constraints are adequate to provide overpressure protection to the RCPB at critical values of pressure and temperature based on RCPB material parameters. The reviewer identifies allowable power levels with one or more inoperable SRVs to ensure that they are suitably conservative, as specified in RS-001, and confirms that the plant technical specifications limit power operation as appropriate. iv. The reviewer identifies all of the reactor trip signals that occur during overpressure transients, including their setpoints and setpoint tolerances. The reviewer verifies that the