ML040360416
| ML040360416 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/14/2004 |
| From: | NRC Region 4 |
| To: | |
| References | |
| FOIA/PA-2003-0358 | |
| Download: ML040360416 (1) | |
Text
Phase 3 SDP Analysis Performance Deficiency ANO Unit 1 fire zone 99-M (North Electrical Switchgear Room) did not meet regulatory requirements for separation of electric cables and equipment of redundant trains of systems necessary to achieve post-fire safe shutdown, and there was lack of adequate procedures for manual actions to achieve post-fire safe shutdown following a fire in fire zone 99-M (or other identified fire zones equivalent to 99-M)
Assumptions Red train cables are not protected with one-hour rated barrier, and are not separated from the Green train cables by a minimum of 20 feet distance free of intervening combustibles No automatic fixed fire suppression system Ionization detection system provides alarm in Main Control Room w
Credit for fire brigade response and arrival at fire zone 1 00-N, which is adjacent to fire zone 99-M Heat release rates of 200-500 kW in fire modeling of duration and severity I.),- -
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