Document: NUREG-0800
Document ID: f209621d-e334-4866-bbfa-78bca86bd44d
Document Type: srp
Title: PRESSURIZER RELIEF TANK
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550003.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.11
CFR Part: 
CFR Title: 

Content:
r verifies that the tank and rupture disks are designed for full vacuum to prevent tank collapse if the contents are cooled after a discharge without the addition of nitrogen. 3. The staff reviews the pressure suppression capability of the system to ensure proper system operation. The reviewer verifies the mass and energy blowdown data, including rate of energy release, to evaluate the above effects. 4. The staff reviews the piping and instrumentation diagrams to verify that alarms for high temperature and pressure and alarms for high and low liquid levels have been provided for the pressurizer relief tank. 5. The reviewer verifies that the system will function following anticipated abnormal occurrences. The reviewer evaluates the failure modes and effects analysis presented in the SAR to ensure the function of required components, traces the availability of these components on system drawings, and confirms that the SAR information includes verification that minimum system flow and heat transfer requirements are met for each degraded situation over the required time spans. For each case, the design is acceptable if minimum system requirements are met. 6. The reviewer determines that a failure of the pressurizer relief tank systems or portions of the systems located close to safety-related systems will not preclude essential operations of these safety systems. Reference to the general arrangement and layout drawings for structures and systems will be necessary. 7. The reviewer determines that other systems inside the containment are protected from the effects of high-energy line breaks and moderate-energy leakage cracks in the pressurizer relief system. The reviewer examines the layout drawings to ensure that other systems are not located close to the pressurizer relief system and that protection from the effects of failure are provided. 5.4.11-7 Revision 3 - March 2007 8. For review of a DC application, the reviewer should follow the above procedures to verify that