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:
de 1.29 for safety-related portions and position C.2 for nonsafety-related portions. 2. General Design Criterion 4, with respect to structures housing the system and the system itself being capable of withstanding the effects of external missiles and internally generated missiles, pipe whip, and jet impingement forces associated with pipe breaks. The basis for acceptance for meeting this criterion is set forth in the SRP Section 3.5 and 3.6 series. 3. General Design Criterion 5, as related to the capability of shared sys- tems and components important to safety to perform required safety functions. 4. General Design Criterion 19, as related to the design capability of system instrumentation and controls for prompt hot shutdown of the reactor and potential capability for subsequent cold shutdown. Acceptance is based on meeting Branch Technical Position RSB 5-1 with regards to cold shutdown from the control room using only safety grade equipment. 5. General Design Criteria 34 and 44, to assure: a. The capability to transfer heat loads from the reactor system to a heat sink under both normal operating and accident conditions. b. Redundancy of components so that under accident conditions the safety function can be performed assuming a single active component failure. (This may be coincident with the loss of offsite power for certain events.) Branch Technical Position ASB 10-1 as it relates to AFW pump-drive and power supply diversity shall be used in meeting these criteria. C. The-capability to isolate components, subsystems, or piping if required so that the system safety function will be maintained. 10.4.9-4 Rev. 2- - July 1981 In meeting these criteria, the recommendations of NUREG-0611 and 0635 shall also be met. An acceptable AFWS should have an unreliability in the range of 10-4 to 10-5 per demand based on an analysis using methods and data presented in NUREG-0611 and NUREG-0635. Compensating factors such as other methods of accomplishing the safety functions of