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:
a result of their failure 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 containment are protected from the effects of high-energy line breaks and moderate-energy leakage cracks in the pressurizer relief system. Layout drawings are reviewed to assure that other systems are not located close to the pressurizer relief system, or that protection from the effects of failure will be provided. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and his review supports conclusions of the following type, to be included in the staff's Safety Evaluation Report: The pressurizer relief tank system includes components and piping such as the pressurizer relief and safety valve connections to the tank, the relief tank spray system piping, the nitrogen supply piping, and piping leaving the tank to the cover gas analyzer and reactor coolant drain tank. The pressurizer relief tank system is designed to nonnuclear safety and Quality Group D requirements since it is not necessary for safe shutdown, accident prevention or accident mitigation. 5.4.11-4 Rev. 2 - July 1981 The staff concludes that the design of the pressurizer relief tank system meets the requirements of General Design Criteria 2 and 4, and is accept- able. This conclusion is based on the following: 1. The applicant's design meets the requirements of General Design Cri- terion 4 as it relates to protection against the effects of earthquakes by meeting positions C.2 and C.3 of Regulatory Guide 1.29 regarding the failure of nonsafety-related systems having no adverse affects on safety-related systems and the extension of seismic Category I design requirements to the first seismic restraint beyond the defined boundaries.(i.e., the piping from the safety and relief valves to the first downstream restraint). 2. The applicant's