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:
criteria to reviewing the loss of nonemergency ac power to the station auxiliaries is discussed in the following paragraphs:41 (a) Compliance with GDC 10 requires that the reactor core and associated coolant, control, and protection systems be designed with appropriate margin to ensure that specified acceptable fuel design limits are not exceeded during any condition of normal operation, including the effects of anticipated operational occurrences. GDC 10 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 that creates a potential for specified acceptable fuel design limits to be exceeded. Within seconds after the loss of power, the turbine and the reactor both trip, and the pressure and temperature of the reactor coolant increase. Regulatory Guide 1.53 provides guidance with respect to the application of the single failure criterion to the design and analysis of nuclear power plant protection systems. Regulatory Guide 1.105 describes a method acceptable to the staff for ensuring that instrument setpoints are initially within and remain within the technical specification limits. Meeting the requirements of GDC 10 provides assurance that specified acceptable fuel design limits will not be exceeded and that fuel cladding integrity is maintained for the loss of nonemergency ac power to the station auxiliaries.42 (b) Compliance with GDC 15 requires that the reactor coolant system and associated auxiliary, control, and protection systems be designed with sufficient margin to ensure that the design conditions of the reactor coolant pressure boundary are not exceeded during any condition of normal operation, including anticipated operational 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