Document: NUREG-0800
Document ID: 5ba2907e-cf47-4a3b-b320-616735faa4cf
Document Type: srp
Title: AUXILIARY FEEDWATER SYSTEM (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350095.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.9
CFR Part: 
CFR Title: 

Content:
ual heat over the entire range of reactor operation and cool the plant to the decay heat removal system cut-in temperature. This review is performed by RSB upon request as indicated in subsection I of this SRP section. 3. The reviewer verifies that the design has feature. o teL the generic recommendations of NVREG-0611 and 0635. For additional short term recom- mendation No. 2 regarding AFW pump endurance tests, a 48 hour test is 10.4.9-7 Rev. 2- - July 1981 acceptable rather than the 72 hour test specified in the NUREGS. The ASB reviewer coordinates with the ICSB reviewer to assure that the instrumen- tation and control system aspects of these recommendations are met by the system design. 4. The reviewer verifies that an AFWS reliability evaluation has been per- formed in accordance with item II.E.1.1 of NUREG-0737. The reliability analysis is reviewed to determine the potential for AFW system failure under various loss of main feedwater transients. 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 auxiliary feedwater system includes all components and equipment from the condensate storage tank (normal operation) or the seismic Category I emergency water supply (including valves and cross connections) to the connection with the steam generators. The AFWS is designed to seismic Category I requirements since system operation is necessary to mitigate the consequences of an accident. This includes an automatic seismic Category I, tornado protected supply of water. to the ANW pump suction. Based on the review of the applicant's proposed design criteria, design bases and safety classification for the auxiliary feedwater system, and system performance requirements during normal, abnormal, and accident conditions, the staff concludes that the design of the auxiliary feed- water system and supporting systems is