Document: NUREG-0800
Document ID: 2cd63ebf-9196-42c0-880d-a80500b202a4
Document Type: srp
Title: - 15.1.4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550005.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.1.1
CFR Part: 
CFR Title: 

Content:
esponse to the initiating event, and rod misalignment, including stuck rods, can produce more severe thermal-hydraulic conditions than would otherwise exist. GDC 26 requires that the thermal margin be sufficient to accommodate these conditions. SRP Section 15.1.1 examines these margins where applicable to ensure that the thermal criteria limits are not exceeded. Meeting the requirements of GDC 26 provides assurance that specified acceptable fuel design limits are not exceeded by ensuring that there is appropriate margin for malfunctions of the reactivity control system, including stuck rods. III. REVIEW PROCEDURES The reviewer will select and emphasize material from the procedures described below, as may be appropriate for a particular case. The procedures below are used for the design certification (DC) application review, construction permit (CP), operating license (OL), and combined license (COL) reviews. During the CP review the values of system parameters and setpoints used in the analysis will be preliminary in nature and subject to change. At the OL review stage review stage, final values are used in the analysis and the reviewer should compare these to the limiting safety system settings included in the proposed technical specifications. 1. Reactor systems reviews the applicant's description of the transients caused by excessive heat removal with specific attention to the occurrences that lead to the initiating event. The sequence of events from initiation until a stabilized condition is reached is reviewed to ascertain: A. The extent to which normally operating plant instrumentation and controls are assumed to function. B. The extent to which plant and reactor protection systems are required to function. 15.1.1-15.1.4-8 Revision 2 - March 2007 C. The credit taken for the functioning of normally operating plant systems. D. The operation of engineered safety systems that is required. E. The extent to which operator actions are required. F. That appropriate