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:
gn, the results of analyses which postulate the rupture of tanks are reviewed to verify that the accident releases are in accordance with safe limits. 5. The reviewer confirms that the CVCS system’s capability is sufficient with respect to the plant’s ability to withstand or cope with, as applicable, and recover from, a SBO by determining compliance with Regulatory Guide 1.155 positions C.3.2, C.3.3.4, and C.3.5. This review is coordinated with the review of the SBO event under SRP Section 8.4 (proposed). For plants/applicants that do not submit adequate test data to demonstrate the integrity of the reactor coolant pump seals during a SBO for an extended period, the reviewer verifies that there are adequate means to provide RCP seal cooling during a SBO. A diverse seal injection system, that is independent of the CVCS and associated support systems to the extent practicable, is an acceptable approach. If a diverse seal injection system is proposed by the applicant, the reviewer verifies that the system can be powered from the alternate AC power source for station blackout. 9.3.4-13 Revision 3 - March 2007 For those plant designs that use sealless reactor coolant pumps such as canned-motor pumps in the AP1000 design that have no pump seals, nor the need for seal injection or cooling from the CVCS, this review step is not needed. 6. For those PWR designs, such as Westinghouse’s AP1000, where the CVCS makeup isolation valves are designed to perform the safety functions of containment isolation and makeup isolation for termination of the RCS makeup to prevent overfilling of the pressurizer during non-LOCA transients or to prevent steam generator overfilling during a steam generator tube rupture, the reviewer should ensure that proper limiting conditions for operation and surveillance requirements for the CVCS makeup isolation valves be incorporated in the plant technical specifications. 7. For review of a DC application, the reviewer should follow the above