Document: NUREG-0800
Document ID: 7618541a-760e-4727-b8a2-2964447ab902
Document Type: srp
Title: - 15.4.5-6
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550007.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.4.4
CFR Part: 
CFR Title: 

Content:
iate the operation of SSCs important to safety to ensure that SAFDLs are not exceeded. Meeting the requirements of GDC 20 provides assurance that SAFDLs are not exceeded during any condition of normal operation, including the effects of AOOs. 5. Compliance with GDC 26 requires that one of the reactivity control systems shall use control rods capable of reliably controlling reactivity changes to ensure that under conditions of normal operation including AOOs, and with appropriate margin for malfunctions such as stuck rods, SAFDLs are not exceeded. GDC 26 is applicable to this section because the reviewer evaluates the consequences of the events associated with startup of an inactive loop or a recirculation loop at an incorrect temperature and with a flow controller malfunction causing an increase in BWR core flow rate. This section, SRP Sections 15.4.4, 4.2 through 4.4, and 7.2 through 7.5, and Regulatory Guides 1.53 and 1.105, provide guidance for ensuring that the reactivity control system (control rods) is capable of reliably controlling reactivity changes with appropriate margin for malfunctions such as stuck rods. Meeting the requirements of GDC 26 provides assurance that SAFDLs are not exceeded during any condition of normal operation, including the effects of AOOs. 6. Compliance with GDC 28 requires that reactivity control systems be designed with appropriate limits on the potential amount and rate of reactivity increase to ensure that