ML20064J048
| ML20064J048 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/30/1978 |
| From: | Fickeissen K JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20064J047 | List: |
| References | |
| NUDOCS 7812280236 | |
| Download: ML20064J048 (3) | |
Text
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itial Telephone Cate of port Date:
Occurrence:
l'ove-5cr 29.1978 itial Written Tire of port Cato:
t;ove-52r 30,1978 Occurrence:
14C3 OYSTER CREEK f;UCLEAR GE!;ERATIN3 STATION FORKED RIVER, NEW JERSEY 03731 Reportable Occurrence Esport T;o. 53-219/78/29-lP EA'TIFICATIG?;
Violation of the Technical Specifications, paragraph 4.5.B.1,2, CCC'C'3;;E:
sch:n results of tha Prir.2ry Ccatairmnt Integrcted : Leak Rate Test failed to reet the alle,able leakage rcquirc :r.t of cne weight percent per day as stated in the referenced Technical Specification.
This event is censidered to be a reportable occurrence as defined in the Technical Specificaticas, paragraph 6.9.2.a.3.
CITIC'.S PRIOR Steady State Pow r Routine Shutd:.m C CCUT.'.Z;.;E :
Hot Star.dby Cpiration Cold Shutdo.n Lcad Ch:cgas Caring X
Refcaling Shutdcun Routine Fo. car C.Or.ticn Rcutina Startup Cther (Specify)
Operation Reactor Ma'fc Suitch:
Shutdctm i'Od2rator Ter?arature:
approxir. tely 160*F.
R27:ctor vessel head in place.
Contain 2nt Pressure:
approxtrastely 35.6 psia 5 '.
;UI G.i t;ove-bar 20, 1978, at approxt: ately 2203 teurs, the Prir.ary C3 L.:E:
Ccitair. :nt Vossel.::s pressuriz:d to 23.9 p;ia (22.2 psig) for t; 2 p.,rpose of ccch: ting a Type A Ccatain cat Lc-ak T.cte Test.
Curing the course of car. ducting the Type A Test, it os discoverr.4 t': t the ccntair.mnt leckage rate w:s e,rc-:ter th n allc.nble.
- westigatica as to tha cause of the excessive le..hage centinued i:,til ap;;roxis ately 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> on !!:ve-Mr 23, 1978.
C. iring t'.is tire pericd, tha follcaing leaks ware idantified and isolated or repaired:
1)
Isolatica Condanser Vent Valves V-14-1 and 19 and V-14-5 ar.d 20 were isolated by closing V-1-71 (bound *.ry extension).
2)
Reactor Cuilding to Tcrus Vacuun Erecker differential pressure sensing switches, DPS-65A cr.d DPS-663 mre isolated.
l 7b.2280}%
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.ortable Occurrence Page 2
.;: ort No. 50-219/78/29-lP 3)
Drywell Vent Yalves V-27-1 and V-27-2.
V-27-2 was repaired.
The test was then restarted at 1905 hours0.022 days <br />0.529 hours <br />0.00315 weeks <br />7.248525e-4 months <br /> on November 23, 1978, and was successfully completed at 0248 on November 24, 1978.
' PARENT CAUSE X
Design Procedure OCCURRENCE:
Manufacture Unusual Service condition Installation /
Inc. Environmental
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Construction X
Component Failure Operator Other (Specify)
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w The failure of the Reactor Building to Torus Vacuum Breaker D/P sensing switches are the sub. ject of LER 50-219/78/26-lP.
The cause of failure of the Isclation Condenser Vent Valves is attr%ted to excessive leakage through the seat sealing surfaces.
(Type C Test was not performed prior to Type A Test.) The cause of failure of the Drywell Vent Valves is attr%ted to excessive leakage past the butterfly disc / boot seating surfaces for V-27-1 l
and through the disc to stem taper pin which was found to be l
loose.
(Type C Test was performed prior to Type A Test and passed.)
Vd.YSIS OF Under design basis loss of coolant accident conditions (LOCA).
ICURRENCE:
the containments (LOCA), the contairmient isolations valves function to limit the leakage out of the containment structure to less than one (1) weight percent of the containment atmos-phere per day.
Conferimance to this criteria assures that the release limits set forth in 10CFR100 will not be exceeded.
The test results indicated that the limit of one (1) weight percent per day would have been exceeded.
ORRECTIVE The necessary corrective actions required to satisfy the operation ACTION:
leak rate criteria were:
1)
Switches DPS66A, B were replaced with switches of a higher pressure rating and successfully type "C" tested at 35 psig.
No leakage was detected.
2)
The isolation condenser vent valves were repaired and successfully type "C" tested at 35 psig; the results of the test were added to the type "A" test results.
3)
Both drywell vent valves were replaced after successful l
completion of the type "A" test and were successfully type "C" tested.
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Reportable Occurrence Page 3 Report No. 50-219/78/29-1P FAILURE DATA:
To be provided later.
[
Date:
[
V4 M/68 Prepared by:
_K. O. E. Fickeissen, Jr.[
1 G
I 1
i Repairtablo Occurrenco P;ge 3 Report No. 50-219/78/29-1P FAILURE DATA:
To be provided later.
K. O. E. Fickeissen, Jr.[
n l
1
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