ML19312E554
| ML19312E554 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 05/27/1980 |
| From: | Wil Madison VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Webster T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19312E555 | List: |
| References | |
| NUDOCS 8006050304 | |
| Download: ML19312E554 (1) | |
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'VIEGINTA EI2CTRIC AND PCLYR CQfPANT
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IVE2rs Safety Injection Actuatten Ma. 4 IIR/30 30- 4 /2.17-0 p
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At 471.6 cm May'23, 1980, with the unit at Hot Str.n j, actuatiaa i
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of the Emergency Core Ccoling System was initiated by a Ligh stam lica fi
[. j ficw/lo-lo Tsve signal.
Vital Eas 1-III was de-energize.s at :
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of the ECCS initiation.
The high steun if ce ficw sig:21 L a esas d L;
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the loss' of Vital &as I-III.
The la-lo Tava was caus4.J L ar..ua all
- 1. j Reacto'r Cac,lant P ;s haJ teen tris;eJ Jae to loss cf ct:ci. :.ent ccc. ling
!' E to the pasps caused by loss of Vital Bas 1-III.
The Vital Eos I-III was i
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lost shan Unit } '"A" Reactor Ceolant Puap was start 4J ar.p: sntly cau iugg frequency oscillations in the IC to AC inverter for Vic.1 1.s 1-11I n.1
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bicuing a fase is the inverter.
11.are was no releasa of. a.c,Jeti i t.f I
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' Juring the transient.
i Iha Safety Icjection Signal kan raset ast.,'.0143 a:J 5;ist./ Ia j e e.t ic a was tecnizated in accordanca with 1-EP-5 at 0151 when kaacter cualaut Systra letJ:,.s was established acJ co1J 14g injactica fie ; was see:ared.
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o An engineering realuation was initiated to revit.v the plaat r e :,p an a.-
dario; tha transient.
As a resalt of the Sa fet y Iuject i on. II.; L 4,...l i a,,
Water Storage Tank level Jce;.;,ed t.elcu tl.e 450.CCD g"211on liuit ei T.S.3.5.5; the Borca Jajectics T.sk was lef t containing 2CCu i;u Lo.nea water instead of 20 CCD nca horated water as rerraired b/ T.S.3.5.*.1; and the Eaergency C4aJassata Stora;e Tank was ds;,1;.*t44 luss t i..a 11u,cco by the au:siliary facdwater pumps ubich is contras7 to T.S.3.7.1.3.
These are all espected events follcuing an actuation of the ECCS and each systesa performed its functica as intended.
The operators refilled tha EUST and ECST and reLorated the BIT as required by the appropri:.te Technical Specification Actica statements.
Dating the Safety Iajscalcu tha follcuing a,upacted aw.:. te occurad:
Upca receiving the Safety Tajection Signal, emargency diesel generator 1H autcantically started as designad, hcvaver tri. red sbsrtlj t
thareaf t er en overspeed. This is a asec 4 occurance. The t rip w.:s reset and the. diesel was successfully restarted to verify operability.
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The unit is'. presently Su cold shutdr.va.
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