Document: NUREG-0800
Document ID: 39a29810-fdf5-459d-8cb0-ca10af9588d2
Document Type: srp
Title: - 15.4.5-5
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:
Revision 2 - March 2007 evaluation, or (b) unless the uncertainty has otherwise been accounted for (see SRP Section 4.4). 3. The core burnup is selected to yield the most limiting combination of moderator temperature coefficient, void coefficient, Doppler coefficient, axial power profile and radial power distribution. 4. Mitigating systems should be assumed to be actuated in the analyses at setpoints with allowance for instrument uncertainty in accordance with Regulatory Guide 1.105 as determined by the organization responsible for instrumentation and controls. The reviewer shall verify that the protection system (1) automatically initiates the operation of appropriate systems, including the reactivity control systems, to ensure that SAFDLs are not exceeded for this event, and (2) senses the plant conditions and initiates the operation of SSCs important to safety. For BWR plants where flow control is part of the reactivity control system, GDCs 26 and 28 must be satisfied for this event; otherwise, GDCs 26 and 28 are not applicable. Where applicable, GDCs 26 and 28 are satisfied if compliance with GDCs 10 and 15 is demonstrated. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. Compliance with GDC 10 requires that the reactor core and associated coolant, control and protection systems be designed with appropriate margin to ensure that SAFDLs are not exceeded during any condition of normal operation, including the effects of AOOs. GDC 10 is applicable to this SRP section because the reviewer evaluates the consequences of events associated with startup of an inactive loop or recirculation loop at an incorrect temperature and with a flow controller malfunction causing an increase in BWR core flow rate. This section, SRP Sections 4.2 through 4.4, and 7.2 through 7.5, and Regulatory Guides 1.53 and 1.105, provide guidance for ensuring