Document: NUREG-0800
Document ID: 8c063fac-91e7-453e-80fa-050245af034a
Document Type: srp
Title: 4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350142.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.5.1
CFR Part: 
CFR Title: 

Content:
Rev. 1 - July 1981 reviewer should compare these to the limiting safety system settings included in the proposed technical specifications. The applicant's description of events leading to an increase in reactor coolant inventory is reviewed by RSB regarding the occurrences leading to the initiat- ing event. The sequence of events, from initiation until a stabilized condition is reached, is reviewed to ascertain: 1. The extent to which normally operating plant instrumentation and controls are assumed to function. 2. The extent to which plant and reactor protection systems are required to function. 3. The credit taken for the-functioning of normally operating plant systems. 4. The operation of engineered safety systems that is required. 5. The extent to which operator actions are required. 6. That appropriate margin for malfunctions, such as stuck rods (see II.3.b), are accounted for. The applicant should present a quantitative analysis in the SAR of the event leading to an'increase in reactor coolant inventory which is the most limiting. For this event, the RSB reviewer, with the aid of the ICSB reviewer, reviews the timing of the initiation of those protection, engineered safety, and other systems needed to limit the consequences of the event to acceptable levels. The RSB reviewer compares the predicted variation of system parameters with various trip and system initiation setpoints. The ICSB review of Chapter 7 of the SAR confirms that the instrumentation and control systems design is con- sistent with the requirements for safety system actions for these events. To the extent deemed necessary, the RSB reviewer evaluates the effects of single active failures of systems and components which may affect the course of the transient. In this phase of the review, the system reviews are per- formed as decribed in the SRP sections for Chapters 4, 5, 6, 7, 8, and 9 of the .SAR. The mathematical models used by the applicant to evaluate core performance and to predict system