Document: NUREG-0800
Document ID: b085cd1c-2d74-4547-b757-d8513d0cb353
Document Type: srp
Title: OVERPRESSURE PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070419.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.2
CFR Part: 
CFR Title: 

Content:
m may be manually enabled; however, an alarm to alert the operator to enable the system at the correct plant condition during cooldown, should 52 be provided. Positive indication should be provided to indicate when the system is enabled. An alarm should be provided when the protective action is initiated. The Instrumentation & Controls Branch (HICB) assists the SRXB in reviews of the design criteria and design for the low temperature overpressure protection system controls and instrumentation as described in subsection I of SRP Section 5.2.2. 53 5. To assure operational readiness, the overpressure protection system should be testable. Technical specification surveillance requirements should include: a. A test performed to assure operability of the system (exclusive of relief valves) prior to each shutdown. b. A test for valve operability, as a minimum, be conducted as specified in the ASME Code Section XI. 6. The system must meet the requirements of Regulatory Guide 1.26, "Quality Group Classifications and Standards for Water-, Steam-, and Radioactive-Waste-Containing Components 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 availability 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 event should include additional analyses DRAFT Rev. 3 - April 1996 5.2.2-12 considering inadvertent system initiation/actuation or provide justification to show that existing analyses