ML042960327
| ML042960327 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/14/2004 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2004-0307 | |
| Download: ML042960327 (1) | |
Text
Preliminary Sequence of Events 06/14/2004 PVNGS LOOP Time (APS) Time (SRP) T+ Event 07:40:55.747 07:40:55.790 Fault inception, C phase to ground, 115"h Ave and Union Hills (Westwing - Liberty line) 07:40:55.814 4.0 cycles Westwing breaker 1126 opens 07:40:55.822 8.5 cycles Liberty breaker 1282 opens 07:40:56.115 07:40:56.118 22.1 BreakersAFX732 andAFX735 open cycles SEL-321 directionalground time overcurrent 07:40:56.136 23.3 Westiving breakers 1426 and 1522 open cycles 07:40:56.165 25.1 Deer Valley breakers 322, 722, and 962 open cycles 07:40:56.172 25.5 Westwing 1726 and 1822 open cycles 07:40:56.515 46.1 Westwing 1222 opens cycles 07:40:59.489 3.7 sec Hassayampa935 and 938 open (Arlington Valley Line)
Received direct transfer tripfrom Arlington 07:41:01.982 l Faultbecomes phase B and C to ground 07:41:02.154 Fault becomes phase C to ground 07:41:02.799 Fault becomes phase B and C to ground 07:41:07.851 12.06 sec PVNGSSwitchyard975 and 972 open (Hassayampa#2 line) trips on broken conductor detection 04:41:07.875 12.08 sec PVNGSSwitchyard982 and 985 open (Hassaymapa# 3 line) trips on broken conductor detection 07:41:07.88 12.09 sec PVNGSSwitchyard 942 and 945 open (Hassaymapa# I line) trips on broken conductor detection 07:41:08.104 Fault becomes phase A. B, C to ground 07:41:20.005 24.21 sec PVNGSSwitchyard992 opens (Devers line) 07:41:20.113 24.32 sec PVNGS Switchyard 932 and 935 open (Rudd line)
GE D60, P077 (permissive overreachingtransfer trip) 07:41:20.864 25.07 sec PVNGSSwitchyard912 and 915 open (Westving I line)
SEL-321, POT 07:41:20.895 25.10 sec PVNGS SWitchyard 922 and 925 open (Westving 2 line)
GED60, POT 07:41:23.848 28.06 sec PVNGSSivitchyard988 opens (trips Unit 3) 07:41:24.641 28.85 sec PVNGSSwitchyard918 opens (trips UnitI) 07:41:24.652 28.86 sec PVNGSSwitchyard938 opens (trips Unit 2) 07:41:34.615 38.868 sec Faultcleared
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