Document: NUREG-0800
Document ID: 16afcc26-09c8-4627-8906-8c56ffe8434b
Document Type: srp
Title: LOSS OF NORMAL FEEDWATER FLOW
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070683.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.2.7
CFR Part: 
CFR Title: 

Content:
r system shall be provided to permit functioning of structures, systems, and components important to safety. The safety function for each system (assuming the other system is not functioning) shall be to provide sufficient capacity and capability to ensure that specified acceptable fuel design limits and design conditions of the reactor coolant pressure boundary are not exceeded as a result of AOOs. GDC 17 is applicable to SRP Section 15.2.7 because the loss of normal feedwater flow transient is an AOO. Meeting the requirements of GDC 17 provides assurance that specified acceptable fuel design limits and design conditions of the reactor coolant pressure boundary are not exceeded as a result of a loss of normal feedwater.32 4. Compliance with GDC 26 requires that two independent reactivity control systems be provided capable of reliably controlling reactivity changes to ensure that acceptable fuel design limits are not exceeded. DRAFT Rev. 2 - April 1996 15.2.7-8 GDC 26 is applicable to SRP Section 15.2.7 because this section evaluates the consequences of the events of a loss of normal feedwater flow that result in a decrease in heat removal by the secondary system with the potential for causing changes in reactivity within the core that could cause the thermal design criteria for the fuel cladding to be exceeded. SRP 15.2.7 ensures that the thermal margin be sufficient to accommodate these conditions and ensures that the appropriate margins for malfunctions of reactivity controls such as stuck rods are accounted for. Meeting the requirements of GDC 26 provides assurance that specified acceptable fuel design limits are not exceeded by ensuring that there is appropriate margin for malfunctions of the reactivity control system.33 III. REVIEW PROCEDURES The procedures below are used during the reviews of both construction permit (CP) and operating license (OL) applications. During the CP review the values of system parameters and setpoints used in the analysis will be