Document: NUREG-0800
Document ID: 0b529a75-fd6e-4e39-9791-94f199dfcf56
Document Type: srp
Title: CHEMICAL AND VOLUME CONTROL SYSTEM (PWR) (INCLUDING BORON
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070160660.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.4
CFR Part: 
CFR Title: 

Content:
eviewed to determine the maximum change in primary coolant boron concentration due to equipment or control errors as determined from failure modes and effects analyses. H. The operating procedures and controls for boron addition and primary coolant dilution are reviewed for adequacy. I. The system P&IDs are examined to determine whether all components and piping that can contain boric acid will either be heat traced or will be located within heated rooms to prevent precipitation of boric acid. J. The application is reviewed with respect to establishing a leakage control program, for those portions of the CVCS located outside containment that may contain radioactive material following an accident, consistent with item III.D.1.1 of NUREG-0737. K. The CVCS low pressure or holdup tanks that can contain primary system water are reviewed to assure adequate measures have been taken to protect against vacuum conditions that could result in tank damage (see Reference 18). With respect to the prevention of vacuum conditions in system tanks, the reviewer should consider the following: (a) tanks with a cover gas are able to admit the cover gas fast enough to keep up with the maximum rate of liquid removal; (b) vacuum relief valves are included in a surveillance program; and (c) tanks subject to freezing conditions have adequate freeze protection for the tank and the vacuum relief system. L. The reviewer verifies that the applicant has considered the following guidance regarding the design of the CVCS miniflow systems necessary to ensure safety related CVCS pump protection (References 19, 20 and 21): i. Ensure that the minimum cooling flow provided for the CVCS pumps is adequate under minimum flow operating conditions, including verification that the system configuration precludes pump-to-pump interaction during miniflow operation that could result in dead-heading one or more of the pumps. The miniflow should be sufficient to prevent damage to the pump(s) under minimum flow