Document: NUREG-0800
Document ID: 8f36358d-8e5e-4f79-a3ea-ce1e8cf349bf
Document Type: srp
Title: PRESSURIZER RELIEF TANK
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340639.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.11
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Auxiliary Systems Branch (ASB) Secondary - None I. AREAS OF REVIEW The pressurizer relief tank is a pressure vessel provided in typical pressurized water reactor (PWR) primary systems to condense and cool the discharge from the pressurizer safety and relief valves. Discharges from small relief valves located inside the containment may also be piped to the tank. Tank capacity is based on a requirement to absorb the pressurizer discharge during a specified step load decrease. The review of the pressurizer relief tank, as described in the applicant's Safety Analysis Report (SAR), includes the tank, the piping connections from the tank to the pressurizer relief and safety valves, the tank spray system and associated piping, the nitrogen supply piping, and piping leaving the tank to the cover gas analyzer and to the reactor coolant drain tank. The pressurizer relief tank system is nonsafety related; the review is primarily directed toward assuring that its operation is consistent with transient analyses of related systems and that failure or malfunction of the system could not adversely affect essential systems or compo- nents in accordance with applicable criteria. The review covers the following specific areas: 1. The seismic design classification of the pressurizer relief tank and its supporting systems. I 2. The quality standards to which the tank and its supporting systems will be designed, fabricated, erected, and tested. 3. The measures taken in the design to prevent system performance degradation below acceptable levels as a result of failures of other nearby systems or as a result of the tank failure during an anticipated abnormal occurrence. Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of ppltions to conanct and operte nuclear power plants. These documents are made available to the public as part of