ML19308B282
| ML19308B282 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 10/18/1979 |
| From: | Heishman R, Reyes L, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-III-79-017B, PNO-III-79-17B, NUDOCS 7912200435 | |
| Download: ML19308B282 (2) | |
Text
.
Yn uUh n PRELIMINARY NOTIFICATION Date: October 18, 1979 P?ILIMINARY NOTITICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-lII-79-17B This areliminarv notification constituten EARLY notice of events of POSSIBII saf ety or public interest significance.
The information presented is as i itially received without verification o'r evaluation and is basically all tha t is known by I$ staff on this date.
F,m,ci l i,ry : Tnledo F.dfann Company Davis Besse 1 (DN 50-346) Cak Harhur, OH g
D)
Al Subi ect :
REACTOR TRIP.WITH StrdSEQtiEh'1' T.OSS OF OFFSTTE POWEll OQ Op g"}
~
This FN supplcr.cnts PNO-III-79-17A innued on Octnher 17, 1979.s 4
The reacter enarinues to be malutained in hut stundby (Mut'e 3 - O power, average conlant temperature greater than 280o) while the plet araff and the NaC en11te inspectors cocplete their independent reviews and 6 valuations ot th a reactor trip, the subsequenL loss of offsite power und equipment probicas experienced during those events.
1 The less of of fsite power und the plant bimekout caused by the f ault of the "J" Bi.s uns ques tioned by the onsite inspectors.
As a resu1L, Lhe matter has heen evaluarad by TE and NRR, and they determined that plaut devicu meets g::ner:1 deuign Critorion 17.
TECu cauaceinent screed Lu uut allow the plant to prueved to !!udu 2 until the caana han heen determined and the corrective actions identified to prevent rueurranca of 5 equipmant prnblems experienced during the event.
3e *4RC etsite representativea vill review, evaluate and nhaarve the f.icensee's cerrective actions pe tor to plant utartup.
The five problemx are:
(1) the initic. ting cause of the reactor trip (2) the muffler fallure un the 343 KV Brenker that resulted in the "J" Bus fault, (3) the failure of the 13.8 KV 3reakers to close when initin11y attempting to restore nf fsite power (4) in-shi*.ity to stnre 3 of the RCP's on the first attempt following restoration of offai te enver and (5) the failure of the CCW2 pump and the SW3 pump to be m:Lc:=a* ica11 y sequancud during the loading of emergency diesel generator 2.
Distribution:
Transmitted H St Cnair=an Hendrie Commissioner Bradford S. J. Chilk, SECY Co:cissioner Kennedy Commissionce Ahearne C. C. Kemmerer, CA Ceuxtissioner Gilinsky ACRS (For Distribution)
Transmitted: MN3B P. Bldg IE:XOOS (IE: EQ _
L. V. Cossick, EDO H. R. Denton, NRR H. L. Ornstein, EDO R. C. DeYoung, NRR J. J. Touchard, PA R. J. Mattson, NRR Landow (6 min /pai N. M. IIaller, MPA D. Vassallo, NRR J. J. Cummings, CIA R. G. Ryan, OSP D. Eisenhut, NRR H. K. Shapar, ELD SS Bldg OiAIL) 1 W. J. Direts. NMSS R. M2nogue, SD S. Levine, RES II:XOOS 7 912200 93p PRELIMINARY NOTIFICATION
s 4
?.bIII T October 18, 1979 hT -adicte Actics Letter confir:J.n;; these actions was relecopied to Toledo Edinnn Cnepany nn October 17. 1979.
~~ae Renton intends to issue a press release today (October 18, 1979) concerning ene 1sediate Action Letter.
~his infor. nation is current. as of 9:30 a.m. on October 18, 1979.
'.4 x
Cotitact :
(."
Reye s_.
R.' bJarnick Y.
ish: nan 419/898-2775 Section Chier Branch Chief 387-9331 387-9314 i
l O]D D
v o Ju D ~9~T.~
v JU
_J l
{
1 l
,