Document: NUREG-0800
Document ID: 342f1000-4156-44cc-8e70-348bf32860b8
Document Type: srp
Title: CIRCULATING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380215.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.5
CFR Part: 
CFR Title: 

Content:
final safety analysis report (FSAR). Upon request from the primary reviewer, the interface reviewers will provide input for the areas of review stated in subsection I. The primary reviewer obtains and uses such input as required to ensure that this review procedure is complete. 1. Although the circulating water system is not safety related, a failure of this system, or any of its components, may affect a safety-related component 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, the reviewer 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 reviewer analyzes the descriptions and drawings in the SAR and determines that provisions are incorporated in the design to prevent unacceptable flooding of areas containing safety-related equipment or to mitigate the consequences of flooding. 10.4.5-5 Revision 3 - March 2007 2. The reviewer analyzes the CWS to verify the capability to detect leaks and to secure the system quickly and effectively. 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. For review of a DC application, the reviewer should follow the above procedures to verify that the design, including requirements and restrictions (e.g., interface requirements and site parameters), set forth in the final safety analysis report (FSAR)