Document: NUREG-0800
Document ID: b1bccb14-17b6-422b-93ee-6d4f00b6512b
Document Type: srp
Title: CHILLED WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1510/ML15103A559.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.7
CFR Part: 
CFR Title: 

Content:
med. Recognized codes and standards shall be identified and evaluated to determine their applicability, adequacy, and sufficiency and shall be supplemented or modified as necessary to assure a quality product. Appropriate records of the design, fabrication, erection, and testing of SSCs important to safety shall be maintained by or under the control of the nuclear power unit licensee throughout the life of the unit. 2. The applicant meets GDC 2 requirements for system safety-related portions capable of withstanding the effects of natural phenomena such as earthquake, tornado, hurricane flood, tsunami, and seiche without loss of capability to perform intended safety function. For earthquakes, acceptance is based on RG 1.29, Regulatory Position C.1 for the safety-related portions and Regulatory Position C.2 for the nonsafety-related portions. 3. The applicant meets GDC 4 requirements for the effects of missiles inside and outside of containment, effects of pipe whipping and jets, and environmental conditions caused by high- and moderate-energy line breaks and dynamic effects of flow instabilities and attendant loads (i.e., water hammer) as to impairment of the required functions of 9.2.7-25 Revision 0 – September 2015 auxiliary cooling systems during normal plant operations and under upset or accident conditions (e.g., containment isolation). Acceptance as to effects of water hammer is based on the following: A. Vents for venting components and piping at high points in liquid filled systems, which are normally idle and in which voids could occur, are provided. These vents should be located for ease of operation and periodic testing. B. If in the system design voiding could occur after pump shutdown or during standby, there should be means for a slow system fill upon pump start to avoid water hammer, or the system should be designed to maintain function following an inadvertent water hammer occurrence. C. The applicant shall review operation and maintenance