Document: NUREG-0800
Document ID: e75b7685-2a36-4e9b-a431-02d166dcf372
Document Type: srp
Title: LOSS OF NONEMERGENCY AC POWER TO THE STATION AUXILIARIES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070681.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.2.6
CFR Part: 
CFR Title: 

Content:
al occurrences. GDC 15 is applicable to this section because the reviewer evaluates the consequences of the loss of nonemergency ac power to the station auxiliaries. This is an anticipated operational occurrence, and the reactor coolant pressure needs to be analyzed to ensure that the pressure acceptance criterion is satisfied. DRAFT Rev. 2 - April 1996 15.2.6-6 Meeting the requirements of GDC 15 provides assurance that the design conditions of the reactor coolant pressure boundary are not exceeded for the loss of nonemergency ac power to the station auxiliaries.43 (c) Compliance with GDC 26 requires that one of the reactivity control systems consist of control rods capable of reliably controlling reactivity changes to ensure that – under conditions of normal operation, including anticipated operational occurrences, and with appropriate margin for malfunctions such as stuck rods – specified acceptable fuel design limits are not exceeded. GDC 26 is applicable because the transient analyzed in this section will involve the movement of control rods in response to the transient, and because rod misalignment, including stuck rods, can produce more severe thermal-hydraulic conditions than would otherwise exist. GDC 26 requires that the thermal margin be sufficient to accommodate these conditions. SRP Section 15.2.6 examines these margins, where applicable, to ensure that the thermal criteria remain satisfied. 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, including stuck rods.44 III. REVIEW PROCEDURES The procedures below are used during the review of both construction permit (CP), combined license (COL), and operating license (OL) applications. During the CP review the values of 45 system parameters and setpoints used in the analysis will be preliminary in nature and subject to change. At the COL or OL