Document: NUREG-0800
Document ID: 12f45e44-74bc-4a6b-933a-2fd6bc43c6dd
Document Type: srp
Title: deals with the fuel oil storage and transfer system for these diesel engines up to the engine
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070569.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.4
CFR Part: 
CFR Title: 

Content:
s under which provision of an alternate ac (AAC) power source will constitute acceptable capability to withstand station blackout. Regulatory Guide 1.155 describes a method acceptable to the NRC staff for complying with 10 CFR 50.63. Plants that have emergency ac sources in excess of minimum redundancy requirements for loss-of-offsite-power conditions may use one of the existing emergency sources as an AAC power source for the purposes of coping with a station blackout. Any emergency diesel engine designated as an AAC power source is dependent on support systems such as the fuel oil storage and transfer system. Compliance with 10 CFR 50.63 and the positions of Regulatory Guide 1.155 regarding the ability to cope with a station blackout provides additional defense-in-depth against unacceptable offsite radiological consequences should both offsite and onsite emergency ac power systems fail concurrently.42 9.5.4-7 DRAFT Rev. 3 - April 1996 III. REVIEW PROCEDURES The procedures below are used during the construction permit (CP) review to determine that the design criteria and bases and the preliminary design meet the acceptance criteria given in subsection II of this SRP section. For the review of operating license (OL) applications, the procedures are used to verify that the initial design criteria and bases have been appropriately implemented in the final design. The OL review includes verification that the content and intent of the technical specifications prepared by the applicant are in agreement with requirements for system testing, minimum performance, and surveillance developed as a result of the LGBTSB43 review, as indicated in subsection I of this SRP section. Plant-to-plant variations in the design of fuel oil storage and transfer systems will occur due to the number of architect-engineering companies having design responsibility in this area. Differences may occur in the number of redundant systems, in piping interconnections between diesel engines, and in