Document: NUREG-0800
Document ID: 7aef037f-a817-4377-a41f-be2c1006a20b
Document Type: srp
Title: STATION SERVICE WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350543.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.1
CFR Part: 
CFR Title: 

Content:
requirements. Based on the review of the applicant's proposed design criteria, design bases and safety classification for the service water system regarding the requirements for continuous cooling of safety-related components necessary for a safe plant shutdown, the staff concludes that the design of the ser- vice water system is acceptable and meets the requirements of General Design Criteria 2, 4, 5, 44, 45, and 46. This conclusion is based on the following: 1. The applicant has met the requirements of General Design Criterion 2 with respect to safety-related portions of the system being capable of withstanding the effects of earthquakes. Acceptance is based on meeting Regulatory Guide 1.29 position C.1 for the safety-related portions and position C.2 for the nonsafety-related portions. 2. The applicant has met the requirements of GDC 4 with respect to the effects of missiles inside and outside of containment, effects of pipe whip, jets and environmental conditions resulting from high and mod- erate energy line breaks and dynamic effects associated with flow instabilities (i.e., water hammer'loads) with respect to impairment of the required service water systems during normal plant operations, and under upset or accident conditions. Acceptance with respect to effects of water hammer is based on the following: a. Vents shall be provided for venting of components and piping at high points in liquid filled, but normally idle piping (or systems) where voiding can occur. These vents should be designed for ease of operational testing on a periodic basis. b. Consideration will be given to voiding which can occur following pump shutdown, or during standby. If the system design is such that voiding could occur, means should be provided for a slow system fill upon pump start for avoidance of water hammer or that the system be designed to maintain functioning following an inadvertent water hammer occurrence. c. operating and maintenance procedures will be reviewed by the