Document: NUREG-0800
Document ID: a9a7e1a8-e1f6-44b0-8ded-a044be0e9e01
Document Type: srp
Title: 3
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350392.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.4.4
CFR Part: 
CFR Title: 

Content:
increase transients presented in the SAR is reviewed by RSB regarding the occurrences leading to the initiating 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 III.3.b), is accounted for. If the SAR states that a particular core flow transient is not as limiting as some other similar transient, the reviewer evaluates the justification presented 15. 4. 4-4 Rev. 1 - July 1981 by the applicant. The applicant should present a quantitative analysis In the SAR of the increase in flow transient that is determined to be most limiting. For this transient, the RSB reviewer, with the aid of the ICSB reviewer, reviews the timing of the initiation of protection, engineered safety feature, and other systems needed to limit the consequences of the core flow increase transient to acceptable levels. The RSB reviewer compares the predicted variation of system parameters with various trip setpoints. The ICSB review of Chapter 7 of the SAR confirms that the instrumentation and control system design is consistent with the requirements for safety systems actions for these events. To the extent deemed necessary, the RSB reviewer evaluates the effect of single active failures of safety systems and components which may alter the course of the transient. This phase of the review uses the system review procedures described in the SRP sections for Chapters 5, 6, 7, and 8 of the SAR. The reviewer considers and evaluates the possibility of a single failure that would permit the loop