ML060690277

Sp - 10 CFR-50 Appendix R - Fire Protection of Safe Shutdown Capability

ML060690277
Person / Time
Site:	Wolf Creek, Callaway
Issue date:	05/30/2003
From:	Union Electric Co
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2006-0095
Download: ML060690277 (1)

Text

CALLAWAY - SP 10 CFR 50 Appendix R Union Electric IIL.G Fire Protection of Safe Shutdown Capability

1. Fire protection features shall be provided FSAR Appendix 9.5B provides an for structures, systems, and components area-by-area analysis of the important to safe shutdown. These SNUPPS power block that features shall be capable of limiting fire demonstrates that no single fire can damage so that: prevent safe shutdown.

a. One train of systems necessary to Redundant trains of systems achieve and maintain hot shutdown required to achieve and maintain conditions from either the control hot standby are separated by room or emergency control 3-hour-rated fire barriers, or the station(s) is free of fire damage; and equivalent provided by III.G.2, or else a diverse means of providing

b. Systems necessary to achieve and the safe shutdown capability exists maintain cold shutdown from either and is unaffected by the fire.

the control room or emergency control station(s) can be repaired For redundant trains of systems within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. required to achieve and maintain cold shutdown that could potentially

2. Except as provided for in paragraph G.3 of be affected by a single fire, repairs this section, where cables or equipment, or local operator actions can be including associated non-safety circuits performed within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

that could prevent operation or cause maloperation due to hot shorts, open As described in Appendix 9.5B and circuits, or shorts to ground, of redundant Section 7.4, an auxiliary shutdown trains of systems necessary to achieve and panel is provided as a dedicated maintain hot shutdown conditions are means of achieving and maintaining located within the same fire area outside of hot standby in the event that the primary containment, one of the following main control room is uninhabitable means of ensuring that one of the due to a fire.

redundant trains is free of fire damage shall be provided:

a. Separation of cables and equipment Refer to the Site Addendum for and associated non-safety circuits site-related structures.

of redundant trains by a fire barrier having a 3-hour rating. Structural steel forming a part of or supporting such fire barriers shall be protected to provide fire resistance equivalent to that required of the barrier; 9.5E-4 Rev. OL-13 5/03