Document: NUREG-0800
Document ID: f2baaea2-da38-493b-87bb-aefa0599d669
Document Type: srp
Title: 15.3.2.-7
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550010.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.3.1
CFR Part: 
CFR Title: 

Content:
Revision 2 - March 2007 appropriate margin; thus, when the reactor protection system senses an accident condition, it initiates the operation of safety-related SSCs so SAFDLs are not exceeded. GDC 20 requirements assure that SAFDLs are not exceeded during any AOO of loss of forced reactor coolant flow, including pump motor trips or flow controller malfunctions. 6. GDC 26 requires that one of the reactivity control systems at nuclear power plants include control rods that can control reactivity changes so SAFDLs are not exceeded under conditions of normal operation, including AOOs. The design for this system must have an appropriate margin to accommodate malfunctions like stuck rods. GDC 26 applies to this SRP section because the reviewer analyzes AOOs involving loss of forced reactor coolant flow. The transients analyzed in this section may involve the movement of control rods in response to the transient. Rod misalignment, including stuck rods, can aggravate thermal-hydraulic conditions. GDC 26 requires a thermal margin sufficient to accommodate these conditions. Review under this SRP section examines this margin for whether SAFDLs are exceeded. GDC 26 requirements assure inclusion of appropriate margins to accommodate malfunctions (e.g., stuck rods) of the reactivity control system, assurance that SAFDLs 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 during the construction permit (CP), COL, and operating license (OL) reviews. During the CP review, the values of system parameters and setpoints in the analysis are