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:
. 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 system connected to the discharge side of any pressure-relieving devices such as a quench tank or containment atmosphere. The reviewer determines the effects of these other functions or systems on operation of the overpressure protection system. iii. The reviewer identifies the capacities, setpoints, and setpoint tolerances for all primary and secondary 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. iv. The reviewer identifies allowable power levels with one or more inoperable main steamline safety valves to ensure that they are suitably conservative. The reviewer also confirms that plant technical specifications limit power operation as appropriate per RS-001. v. 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 second reactor trip signal, under worst-case conditions during an overpressure transient, is adequate to provide overpressure protection to the RCPB in conjunction with the installed overpressure protection systems or devices. vi. The reviewer examines all transients analyzed in the accident analysis section of the SAR that result in an increase in the pressure experienced by the RCPB. The reviewer identifies predicated peak pressures and assesses the operating conditions and setpoints used in the analysis to ensure that they are suitably conservative. 5.2.2-11 Revision 3 - March 2007 vii. The reviewer ensures that nonsafety-grade, pressure-operated relief valves are not credited for the mitigation of events that result in an