Document: NUREG-0800
Document ID: d7254cf8-c034-434f-b7d8-6eb96075d286
Document Type: srp
Title: PRESSURIZER RELIEF TANK
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070439.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.11
CFR Part: 
CFR Title: 

Content:
he 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 (see Regulatory Guide 1.26) requirements since 37 it is not necessary for safe shutdown, accident prevention or accident mitigation. The staff concludes that the design of the pressurizer relief tank system meets the requirements of General Design Criteria 2 and 4, and is acceptable. This conclusion is based on the following: 1. The applicant's design meets the requirements of General Design Criterion 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).1.29. Position C.2 indicates that the failure of nonsafety- related systems should have no adverse effects on safety-related systems. Position C.3 indicates that seismic Category 1 design requirements should extend to the first seismic restraint beyond the defined boundaries (i.e., the piping from the safety and relief valves to the first downstream restraint).38 5.4.11-7 DRAFT Rev. 3 - April 1996 2. The applicant's design meets the requirements of General Design Criterion 4 as it relates to protection of safety-related equipment from adverse environmental affects and from missiles generated by rupture disc failure. This criterion is met since the system is designed to prevent steam or water release to containment under any normal operating conditions or anticipated abnormal occurrences and the tank is orientated in such a manner that the rupture discs do not become a missile hazard to safety-related equipment. For design certification reviews,