ML20154C830
| ML20154C830 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 05/12/1988 |
| From: | Ervin A, Labruna S Public Service Enterprise Group |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-003-00, 88-3, NUDOCS 8805180332 | |
| Download: ML20154C830 (5) | |
Text
.
O PSIEG Public Service Electnc and Gas Company P.O. Box L Hancocks Bridge, New Jersey 08038 Hope Creek Operations May 12, 1988 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
Dear Sir:
l HOPE CREEK GENERATING STATION DOCKET NO. 50-354 UNIT NO. 1 SPECIAL REPORT 88-003-00 This Special Report is being submitted pursuant to the requirements of Technical Specification 4.8.1.1.3 and Regulatory i
Guide 1.108.
Sincer ly, 1
S. LaBruna General Manager -
Hope Creek Operations AME:
Attachment SORC Mtg.88-072 C Distribution 8805180332 880512 PDR ADOCK 05000354
$.4 g
DC O The Energy People su, n.,, v n e t
s
. me o e =venan aieviavoay ca un
- .ovsoowe o sim-4 m LICENSEE EVENT REPORT (LER)
.aciun aare m occ.,.,v=....
-m Hope Creek Generating Station 0 ls l 0 t o t o 13 l514 1loFl0l4 h' Valid Energency Diesel Generator Failure To Start - Equipment r ilure a
eve =v onte iei sin n s eea is, escoat oave in or=a a eaciuta s i=vosvio..
neo=tn gav vtan vtan
- gy,86 7M woeitie oa, vgan s.swit,=.wes pocatv %vuesa ss
~
01510 t o t o l i I 0l 4 1l6 8
8 8l8 0 l0 l3 0l0 0l 5 1l 2 8l8
~
~~
0 1 8 1 0l0 io r I t t=w me.oa, e even irvio evaev4=v to two secunei.e=n oe se cea i <ca-. --
- *. w, mi "o** * '
I
= asem w assie m n.uan.i n vim a
m am.nine es n,.nii es tsi.iin,..i vs tii.i 2
(t,=,e g3.=g,;a,4ge,=e nei 11010 m as nino to m.nsi w n.ntnai m
nin.,
w n u ioi m n. nan nai 4,
w ans.ni n.i w n.ninu es n.nsu.=> e' SPEC!AL REPORT w asianin i w n.uan.c w n=nen.i n.003 uca no co=vact een emis ten no glut 7 5 4 8 8=C4 0 %wt*g g e naea ccca A. M. Ervin. Lead Engineer - Technical 6 0 l9 3l3l9l i 5l2 13 l9 comarkets one una con I CM conspong=t pa: Lust os Caleto = fure mEpoa? li3s g$0
,'";g CAVl4 tvl?tw cow *C%t%Y "f"
$E
" I,
'd Ca lt I v f'4 W C0w*040%?
w g.e;s I
I I I I I I I
i i i l 1 i l
i I I 1 I i 1
I ! !
I I I ev 6 s. =, at a i.e.,
...eti o n.
wes,. I :. i,..
,,,g,,,
i.e Se o%
t il IN rse,emees #8'ffff 0 $$ew'33'04 Ca ff'
%Q g
g g
nu, m acs w. u sn -...
n.~,.~,.r.
~.
n e, On April 16, 1988 at 2219 hours0.0257 days <br />0.616 hours <br />0.00367 weeks <br />8.443295e-4 months <br />, the Plant was in OPERATIOllAL CONDITIO!i 1 (Power Operation) at 100% power generating 1060 MWe, At that time the "B"
Emergency Diesel Generator (EDG) started but failed to start within 10 seconds during
- monthly, surveillance testing (actual starting time was 10.1 seconds).
l It was determined that one of the air receivers had failed to 1
discharge.
One of the barring device interlock pistons which is j
in the flowpath of control air to the air start valve solenoid was stuck in the closed position, preventing the passage of control air to the main air start valve.
The piston was manually repositioned and the "B" EDG was retested satisfactory, j
The requirements of Technical Specification 3.8.1.1 were i
satisfied and the action statement was cleared.
The root cause of this occurrence was the failure of the barring gear iaterlock piston to return to its normal position following the removal of the barring device due to piston burring - equipment failure.
The piston was de-burred, cleaned and tested satisfactory.
g'[e /
d l
1..'.
t.a..s. m..... ~
LICENSEE EVENT REPORT (LER) TEXT CONTINUATION
- aoveo ewe =o o w -eio.
e.o.ne s s v,,
,aceurv maast m 00Ca e r evasse n W tse emessee vea
,aet is "D'U#'
Ek'Ji Hope Creek Generating Station l
0l 2 0F ol4 0181010l01315l4 818 NI/lA rarec
-s.-
mmensewmaamm PLANT AND SYSTEM IDENTIFICATION General Electric - Boiling Water Reactor (BWR/4)
Emergency Diesel Generators (EDG) (EIIS Designator:EK)
IDENTIFICATION OF OCCURRENCE Valid Emergency Diesel Generator Failure To Start -
Equipment failure Event Date: April 16, 1988 Event Time 2219 Hours This LER was initiated by Incident Report No.88-073 CONDITIONS PRIOR TO OCCURRENCE The Plant was in OPERATIONAL CONDITION 1 (Power Operation) at 100% power generating 1060 MWe.
DESCRIPTION OF OCCURRENCE On April 16, 1988 at 2219 hours0.0257 days <br />0.616 hours <br />0.00367 weeks <br />8.443295e-4 months <br />, the "B"
Emergency Diesel Generator (EDG) started but failed to start within 10 seconds during monthly surveillance testing (actual starting time was 10.1 seconds).
It was determined that one of the air receivers had failed to discharge.
One of the barring device interlock pistons which is in the flowpath of control air to the air start valve solenoid was stuck in the closed position, preventing the passage of control air to the main air start valve.
The piston was manually repositioned and the "B"
EDG wa7 retested satisfactory.
The requirements of Technical Specification 3.8.1.1 were satisfied and the action statement was cleared APPARENT CAUSE OF OCCURRENCE The root cause of this occurrence was the failure of the barring gear interlock piston to return to its normal position following the removal of the barring device due to piston burring equipment failure ANALYSIS OF OCCURRENCE It is believed that the barring gear interlock piston did not return to its normal position following the removal of the barring device.
The barring device was last used during the 13 month surveillance of the EDG performed on March 18, 1988.
The monthly EDG start test was performed on March 18, 1988 following the 18 month surveillance testing.
Since the "B" EDG started within 10 seconds as required, the mispositioning of the piston was not detected at that time.
75i
w*.2 LICENSEE EVENT REPORT (LERI TEXT CONTINUATION
.aaovio ei,e o nio4io.
In,.g3. p gg
= = i, w.ee. m
.... i n 1.c,.,,
O'?,'.#
"t tu.
l "a
Hope Creek Generating Station l
0l3 08 0l4 Nl/lA o15lololol315l4 818 re v
. -=
=r w m.mm ANALYSIS OF OCCURRENCE (CONTINUED)
At the time of the April 16, 1988 monthly testing of the
- EDG, the mispositioned piston again prevented the discharge of one bank of the EDG starting air. Investigation has determined that a burr on the barring gear interlock piston prevented the piston's return to the withdrawn position and prevented control air from opening the main start valve for one bank of air operators.
The investigation following the failure of the EDG to start identified a burr on the barring gear interlock piston.
The piston was de-burred, cleaned and tested satisfactory.
MLEyIOUS OCCURRENCES This is the first valid failure to start of the "B"
EDG.
There have been two previous valid
- failures, one on the "A"
and another on the "D" EDG, however the root causes of these events were unrelated to the barring gear interlocks.
SAFETY ASSESSMENT Had a more severe operating condition occurred during the period between the last successful start of the "B"
EDG and this failure of the "B" EDG to start within 10 seconds, the AC power supply would have been adequate for all safety functions, since all necessary onsite AC power supply requirements of the plant safety systems can be met by three EDGs.
If, during such an operating condition, the plant suffered a single active failure of one EDG and the "B" EDG experienced a start time of 10.1 seconds (the measured value leading to this valid failure),
adequate emergency AC power would have been available. The 1%
increase over the 10 second start time permitte'd by the Technical Specifications would not have significantly impacted the "B"
EDG performance.
For this reason the health and safety of the public were not compromised by this event.
REPORTABILITY This report is being submitted pursuant to the requirements of i
l Technical Specification 4.8.1.1.3 and Regulatory Guide 1.108.
l
l i
1
- .i..
v.
.. m. wa,... -.. -
LICENSEE EVENT REPORT (LER) TEXT CONTINUATION
- aov io ows e o w ++.
In8 #El 8 h St e w.itymaestau occa e f wveses a '3' gla armee 'ee east is
....c-Hope Creek Generating Station o1510l0l0l3l5l4 8l8 l
0 l4 OF g l4 Nl / h em.
w w m.uon CORRECTIVE ACTIONS l
1.
As previously described, the barring gear interlock piston was de-burred, cleaned and tested satisfactory.
2.
The barring device interlock pistons in the other three EDGs were inspected and no deficiencies were found.
Sincerely, eh S.
LaBruna General Hanecer -
Hope Creek Operations AME:
SORC Mtg.88-072
.w