Document: NUREG-0800
Document ID: b5ea3f55-f54e-45cf-b921-3944d12b4ce2
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350545.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
vention, or avoidance, such as venting and filling capability and operating procedures for avoidance of water hammer. 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 reactor auxiliary cooling water systems include pumps, heat exchangers, valves and piping, expansion tanks, makeup piping, and the points of connection or interfaces with other systems. Portions of the 9.2.2-9 Rev. 2 - April 1984 reactor auxiliary cooling water systems that are necessary for safe shutdown, accident prevention or accident mitigation are designed to seismic Category I and Quality Group C requirements. Based on the review of the applicant's proposed design criteria, design bases, and safety classification for the reactor auxiliary cooling water systems with regard to the requirements for providing adequate cooling water for the safety-related ECCS components and reactor auxiliary equipment for all conditions of plant operation, the staff concludes that the design of the reactor auxiliary cooling water systems 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 systems 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 dynamic effects associated with flow instabilities and attendant loads (i.e., water hammer) with respect to impairment of the required functions of auxiliary cooling systems during normal plant operations, and under upset or accident conditions. Acceptance will be based on the following