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:
ponents of Nuclear Power Plants,"' and Section III of the ASME Code. 7. The overpressure protection system should be designed to function during an Operating Basis Earthquake. It should not compromise the design criteria of any other safety-grade system with which it would interface, such that the requirements of Regulatory Guide 1.29, "Seismic Design Classification," are met. 8. The overpressure protection system should not depend on the avail- ability of offsite power to perform its function. The system should be operable from battery-backed power sources, not necessarily Class 1E buses. 9. Overpressure protection systems which take credit for an active component(s) to mitigate the consequences of an overpressurization 5.2.2-8 Rev. 1 - November 1988 event should include additional analyses considering inadvertent system initiation/actuation or provide justification to show that existing analyses bound such an event. 10. If pressure relief is from a low pressure system, not normally connected to the primary system, the overpressure protection function should not be defeated by interlocks which would isolate the low pressure system from the primary coolant system. (See BTP ICSB3) D. REFERENCES 1. NUREG-0138, Staff Discussion of Fifteen Technical Issues Listed in Attachment to November 3, 1976 Memorandum from Director, NRR, to NRR Staff. 5.2.2-9 Rev. 1 - November 1988