Document: NUREG-0800
Document ID: 824740ba-eb51-4b24-bd6f-df01c35d75f3
Document Type: srp
Title: LOSS OF NONEMERGENCY AC POWER TO THE STATION AUXILIARIES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550008.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.2.6
CFR Part: 
CFR Title: 

Content:
5.2.6-6 Revision 2 - March 2007 exceeded under conditions of normal operation, including anticipated operational occurrences. GDC 26 applies because the transient analyzed in this section involves the movement of control rods in response to the loss of nonemergency ac power and because rod misalignment, including stuck rods, can produce thermal-hydraulic conditions more severe than otherwise. GDC 26 requires a thermal margin sufficient to accommodate these conditions. Under SRP Section 15.2.6 these margins are examined where applicable for whether the thermal criteria remain satisfied. GDC 26 requirements provide assurance by appropriate margin for malfunctions of the reactivity control system, including stuck rods, that specified acceptable fuel design limits are not exceeded. 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 procedures below are used for the review of design certification (DC) application review construction permit (CP), COL, and operating license (OL) applications. During the CP review the values of system parameters and setpoints in the analysis are preliminary in nature and subject to change. At the COL or OL review stage, final values should be in the analysis and the reviewer should compare these to the limiting safety system settings in the proposed technical specifications. 1. The description of the loss of ac power transient presented by the applicant in the SAR is reviewed by the organization responsible for review of transients and accidents analyses regarding the occurrences leading to the initiating event. The sequence of events from