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:
of the vessel is ______ kPag (______ psig), a value within the code allowable of ______ kPag (______ psig) (110 percent of vessel design pressure). 2. PWRs. The overpressure protection system prevents overpressurization of the RCPB under the most severe transients and limits the reactor pressure during normal operational transients. The safety valves provide overpressurization protection. These valves discharge to containment atmosphere or a pressurizer quench tank through a common header from the pressurizer. The SRVs or the safety valves and a large capacity pressurizer in the primary, in conjunction with the steam generator SRVs in the secondary, and the reactor protection and safeguards systems will protect the primary system against overpressure in the event of a complete loss of heat sink. The peak primary system pressure following the most severe anticipated transient is limited to the ASME Code allowable (110 percent of the design pressure) with no credit taken for nonsafety-grade relief systems. The assumption was that the ______ plant was operating at design conditions (percent of rated power) and the reactor is shut down by a scram. The calculated pressure at the bottom of the vessel is kPag (___ psig), a value within the code allowable of_kPag (___ psig) (110 percent of vessel design pressure). Overpressure protection during low-temperature operation (defined in BTP 5-2) of the plant is provided by________ . In addition, the applicant has incorporated into the design the recommendations of Task Action Plan Items II.D.1 and II.D.3, as described in NUREG-0737, and has met the related requirements of 10 CFR 50.34(f)(2)(x), 10 CFR 50.34(f)(2)(xi), or 10 CFR 52.47(a)(8), as applicable. For DC and COL reviews, the findings will also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items relevant to this SRP section. 5.2.2-14 Revision 3 - March 2007 In addition, to the extent