Document: NUREG-0800
Document ID: 33d57664-26a3-4d30-807d-2ce020de062a
Document Type: srp
Title: STATION BLACKOUT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740424.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.4
CFR Part: 
CFR Title: 

Content:
esting, enabling verification of important system parameters, performance characteristics, and features and detection of degradation and/or impending failure under controlled conditions. 3. Compliance with 10 CFR 50.63 requires that each light-water-cooled NPP be able to withstand and recover from an SBO (as defined in 10 CFR 50.2 (Ref. 1)). Meeting the requirements of 10 CFR 50.63 provides assurance that the NPP will be able to withstand (cope with) and recover from an SBO and will ensure that core cooling and appropriate containment integrity are maintained. 8.4-8 Revision 1- May 2010 4. Pursuant to 10 CFR 50.65, the NPP operator should know the grid=s condition before taking a risk-significant piece of equipment out of service and should monitor the grid for as long as the equipment remains out of service. This provides assurance that grid reliability evaluations are performed before undertaking grid-risk-sensitive maintenance activities (such as surveillances, postmaintenance testing, and preventive and corrective maintenance) under existing or imminent degraded grid reliability conditions that could increase the likelihood of an SBO or impact the plant=s ability to cope with an SBO, such as out-of-service risk-significant equipment (e.g., an EDG, a battery, a steam-driven pump, an AAC power source). III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant=s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. The SBO rule (10 CFR 50.63) requires each plant to demonstrate the capability to withstand (cope with) and recover from an SBO condition lasting for a specified duration (coping duration). Specifically, all licensees and