Document: NUREG-0800
Document ID: 853719df-a6ea-408b-8d43-5956155abc38
Document Type: srp
Title: and 8.3.2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740246.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
rred power system at all times. Review of the electrical schematics should determine that controls (automatic, manual, or remote) are provided to maintain these variables and systems within prescribed operating ranges. It should also be determined during the review of the electrical schematics as to what effects failures of these controls and instruments might have on the preferred power system. 9. The review of any automatic TSO action should ascertain that TSO actions (including normal and postulated failure modes of operation) will not interfere with safety actions that may be required of the reactor protection system. This system should also be reviewed to ensure that no failure mode of the TSO system will cause an incident at the generating station which would require protective action. 10. To verify that the relevant requirements of 10 CFR 50.63 are met, if an AAC source is proposed for safe shutdown in the event of an SBO, the capacity, capability, reliability, and independence of the AAC power source are reviewed in accordance with SRP Section 8.4. For evolutionary light water reactor design applications, the reviewer verifies, in accordance with SRP Section 8.4, that the AAC for SBO is of diverse design (with 8.2-24 Revision 5 - May 2010 respect to onsite sources), is consistent with guidance in RG 1.155, has adequate capacity, and has capability for powering at least one complete set of normal safe shutdown loads. 11. The Maintenance Rule Section 50.65(a)(4) requires that licensees assess and manage the increase in risk that may result from proposed maintenance activities before performing the maintenance activities. RG 1.182, used as a companion guide to RG 1.160, provides guidance for assessing and managing the increase in risk that may result from maintenance activities and for implementing the optional reduction in scope of SSC=s considered in the assessment. The review should verify that grid reliability evaluations are performed, as part of the