Document: NUREG-0800
Document ID: 7b7303eb-a3a7-433b-8301-fcaba03194ea
Document Type: srp
Title: - 15.1.4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070676.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.1.1
CFR Part: 
CFR Title: 

Content:
ure and subject to change. At the OL 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. RSBSRXB reviews the applicant's description of the transients caused by excessive heat 41 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: 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. DRAFT Rev. 2 - April 1996 15.1.1-8 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 (per II.3. b) are accounted 42 for. If the SAR states that a particular transient initiating event involving an increase in heat removal is not as limiting as some other similar transient event, the reviewer evaluates the justification presented by the applicant. The applicant is to present a quantitative analysis in the SAR of the increase-in-heat-removal event that is determined to be most limiting. For this transient event, the RSBSRXB reviewer, with the aid of the ICSBHICB reviewer, reviews the timing of the 43 44 initiation of those protection, engineered safety, and other systems needed to limit the consequences of the transient to an acceptable level. The RSBSRXB reviewer compares the 45 predicted variation of system parameters with various trip and system initiation setpoints. The ICSBHICB review of Chapter 7 of the SAR confirms that the instrumentation and control 46 systems design is consistent with the requirements for safety systems actions for these events. To the extent deemed necessary, the