Document: NUREG-0800
Document ID: 4d216111-aa1a-4f5b-905a-42e4027513ca
Document Type: srp
Title: CIRCULATING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350087.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.5
CFR Part: 
CFR Title: 

Content:
f its components, may affect a safety-related compo- nent or system. Since large quantities of water flow through the CWS, a leak or break in a component or pipe or expansion joint failure could cause severe and unacceptable flooding of adjacent areas. The reviewer verifies that the design includes provisions to minimize hydraulic transients and their effect upon the functional capability and the integrity of system components. In evaluating the effects of the failure of an expansion joint, ASB assumes that the butterfly valve(s) are not available to isolate CWS flow out of the failed expansion joint unless the valve(s) have been designed to safety- grade requirements. The ASB reviews the descriptions and drawings in the SAR and determines that provisions are incorporated in the design to pre- vent unacceptable flooding of areas containing safety-related equipment or to mitigate the consequences of flooding. 2. The ASB reviews the CWS to verify that the capability to detect leaks and secure the system quickly and effectively exists. 3. Based on the information contained in the SAR, the reviewer verifies that the applicant's proposed methods for control of water chemistry and of long-term corrosion and organic fouling, and the chemical agents used for these purposes are compatible with the system materials. 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 circulating water system includes all components and equipment necessary to provide the main condenser with a continuous supply of cooling water. The system is designed to nonnuclear safety, Quality Group D requirements since it is not necessary for safe shutdown, accident prevention or accident mitigation. Based on the review of the applicant's proposed design criteria and bases for the circulat- ing water system, the staff concludes that the design of the