ML20206H490
| ML20206H490 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 11/18/1988 |
| From: | Carns N LOUISIANA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| SR-88-009-00, SR-88-9, W3A88-0126, W3A88-126, NUDOCS 8811230209 | |
| Download: ML20206H490 (5) | |
Text
'
Ref:
LOUlSIANA P O W E R & L I G H T / WATERFOAO 3 SES
- PO. BOX B
- KILLONA, LA700664751 maamWu November 18, 1988 W3A88-0126 A4.05 QA U.S. Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, D.C.
20555
SUBJECT:
Waterford 3 3ES Decket No. 50-382 Lictase No. NPF-38 Reporting of Special Report Attached is Specitl Report Number SR-88-009-00 for Waterford Steam Electric Station Unit 3.
This Special Report is submitted per 10CFR50.36(c)(2) and Technical Specifications 4.8.1.1.3 and 6.9.2.
Very truly yours, n)(~
N.S. Carns Plant Manager - Nuclear NSC/WEMark Attachment cca R.D. Martin, NRC Resident Inspectors Office, INPO Records Center (J.T. Wheelock)
E.L. Blake, W.M. Stevenson, D.L. Wigginton GG11230209 891118
' l PDR ADOCK 05000382 y,
- 3 PDC
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I SPECIAL REPORT SR-88-009-00 j
Emergency Diesel Generator Trip Due To Incorrect Valve Lineup INTROJsCTION At 1442 hours0.0167 days <br />0.401 hours <br />0.00238 weeks <br />5.48681e-4 months <br /> on September 9, 1988, Waterford Steam Electric Station Unit 3 was operating at 93% power when Emergency Diesel Generator (EDG) 'B' was secured due to a fuel oil leak on the 4R Injector.
The leak occurred during retesting after maintenance on the EDG.
When the clearance used during maintenance was removed, two isolation valves, EGF-123B and EGF-124B, were incorrectly left close(
These valves allow excess fuel oil from the injector manifold to return back to the 'B' EDG Fuel Oil Feed Tank.
The root cause of this event is personnel error.
The valves were opened and the EDG was successfully tested and declared operable at 2131 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.108455e-4 months <br />.
The incident was dis ussed with Operations personnel.
Thc event w m identified on a Quality Notice (QN) on September 8, 1988, but was not recognized as reportable until October 25, 1988, saen Event Analysis Reporting & Response (EAR &R) personnel were performing a review of a backlog of QNs.
This was a nonvalid diesel generator failure, and this report is submitted pursuant to Technical Specifications (TSs) 4.8.1.1.3 aad 6.9.2.
Since the action requiremer.ts of TS 3.8.1.1 were satisfied, this event did not threaten the health or safety of I
the public or plant personnel.
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o NARRATIVE 1
After action requirements
'b' and
'd' of Technical Specification (TS) 3.8.1.1 were satisfied, Emergency Diesel Generator (EDG)
'B' was placed out-of-service (00S) for maintenance at 0605 hours0.007 days <br />0.168 hours <br />0.001 weeks <br />2.302025e-4 months <br /> on September 7, 1988.
Clearance 88-1167 was used to isolate the affected components.
Two maintenance items were completed while the EDG was 00S.
Routine maintenance on the
'B' Standby Fuel Oil Booster Pump motor was performed per procedure ME-7-014. "DC Motors," and fuel injector pump shims were replaced, per the vendor recommendation, to correct a slight engine imbalance problem.
After the maintenance items were completed, the clearance cas removed in order to test the EDG.
Tho EDG standby valve lineup of procedure OP-9-002, "Emergency Diesel Generator," was used to determine the position which the valves were to be placed when the clearance was removed.
An error was made while transposing the information from OP-9-002 to the clearance, and two valves, EGF-123B and EGF-124E, were mistakenly left shut instead of open as reauired by OP-9-002.
These valves allow excess fuel oil from the EDG injection manifold to return back to the EDG Fuel Oil Feed Tank.
At 1344 hours0.0156 days <br />0.373 hours <br />0.00222 weeks <br />5.11392e-4 months <br /> EDG 'B' was started to check the pressure on each individual cylinder to determine if the slight engine imbalance condition still existed.
The EDG was loaded to 4.4 megawatts (MW) at 1409 hours0.0163 days <br />0.391 hours <br />0.00233 weeks <br />5.361245e-4 months <br />.
A few minutes later, the operator noticed fuel oil spraying from injector 4R, and he reported the leak to the control room.
Control, Room Operators opened the EDG output breaker at 1428 hours0.0165 days <br />0.397 hours <br />0.00236 weeks <br />5.43354e-4 months <br /> and secured the EDG at 1442 hours0.0167 days <br />0.401 hours <br />0.00238 weeks <br />5.48681e-4 months <br />.
The shut fuel injector manifold return isolation valves caused a bachpressure in the "ifold which resulted in the oil leak from the 4R injector.
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The root cause of the event was personnel error.
In an effort to restore the EDG to service as quickly as possible, the operators mistakenly left EGF-123B and EGF-124B shut. The Assistant Operations Superintendent discussed this incident with the personnel involved, and the Operations Superintendent sent a letter to Operatione personnel discussing the event and emphasized allowing sufficient time to perform the job correctly. The 4R injector fuel pump was replaced as a precautionary measure, and the EDG was satisfactorily tested and declared operable at 2131 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.108455e-4 months <br />.
An Operations Quality Assurance (QA) inspector witnessed the earlier test of the 'B' EDG.
He issued Quality Notice QA-88-137 on September 8, 1988, to the Operations Superintendent, addressing the need for corrective action for the incorrect valve lineup. Neither Operations QA persocael nor Operations personnel involved were aware of a reporting requirement for this event, so they did not initiate a Potentially Reportable Event (PRE) when QA-88-137 was initiated.
At 1250 hours0.0145 days <br />0.347 hours <br />0.00207 weeks <br />4.75625e-4 months <br /> on October 25, 1988 Event Analysis Reporting & Response (EAR &R) personnel discovered that this event was reportable while performing a review for reportability of a backlog of quality notices.
EAR &R personr.el are developing a program to review quality notices for reportability. This will ensure a timely reportability review of events described in QNs not initially identified to be reportable. Unsuccessful starting or loading attempts definitely attributed to operating error, as in this case, are not defined as valid tests or failures in avecrdance with Regulatory Guide 1.108 C.2.e(2).
This ev at was a non-valid diesel generator failure; therefore, this report is submitted pursuant to TSs 4.G.1.1.3 and 6.9.2.
There has never been a valid failure of the
'B' EDG.
The current
'B' surveillance interval is once per 31 days.
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Since Action Requirements
'b' and
'd' of TS 3.3.1.1 were always satisfied, this event did not threaten the health or safety of the public or plant personnel.
PLANT CONTACT J.G. Hoffpauir, Assistant Operations Superintendent, 304/464-3178.
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