ML20151C112
| ML20151C112 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 07/15/1988 |
| From: | Carns N LOUISIANA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| SR-88-007-00, SR-88-7, W3A88-0080, W3A88-80, NUDOCS 8807210230 | |
| Download: ML20151C112 (4) | |
Text
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,e Ref:
gm;.d LOUISIANA P O W E R & L i G H T / WATERFORD 3 SES
- RO. BOX B e KILLONA, LA 70066-0751 r ui u sv a July 15, 1988 W3A88-0080 A4.05 QA U.S. Nuclear Regulatory Commission ATTENTION:
Document Control Desk Washington, D.C.
20555
SUBJECT:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 Reporting of Special Report Attached is Special Report Number SR-88-007-00 for Waterford Steam Electric Station Unit 3.
This Special Report is submitted per 10CFR50.36(c)(2) and Technical Specifications 3.3.3.4 and 6.9.2.
Very truly yours, 9)
AO4 N.S. Carns Plant Manager - Nuclear NSC/WEM:rk Attachment cc:
R.D. Martin, NRC Resident Inspectors Office, INPO Records Center (J.T. Wheelock), E.L. Blake, W.M. Stevenson, D.L. Wigginton 6S 8807210230 880715 PDR ADOCK 05000392 l g S
PDC "AN EQUAL OPPORTUNITY EMPLOYER"
SPECIAL REPORT SR-88-007-00 Primary Meteorological Tower Instruments Out-->f-Service Greater Than Seven Days Due to Lightning Strike.
INTRODUCTION At 1405 hours0.0163 days <br />0.39 hours <br />0.00232 weeks <br />5.346025e-4 months <br /> on June 28, 1988, Waterford Steam Electric Station Unit 3 was operating at 100% power when all Primary Meteorological Tower (PMT) instrumentation was declared out-of-service during corrective maintenance on a Delta Temperature Instrument (DTI) and a Wind Speed Instrument (WSI).
Both instruments were found to be out of calibration and were individually placed out-of-service earlier. Maintenance was complete on the DTI at 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br /> on July 2, 1988, and the remaining maintenance on the WSI did not affect the other PMT instrumentation. However, a failure in communications between Operations and Maintenance personnel resulted in Operations personnel conservatively maintaining the PMT out of service.
Before this could be resolved, the PMT was struck by lightning during the evening hours of July 4, 1988, causing damage to the instrumentation.
Sufficient repairs were completec by 1620 hours0.0188 days <br />0.45 hours <br />0.00268 weeks <br />6.1641e-4 months <br /> on July 7, 1988, enabling the PMT to be declared operable by 1627 hours0.0188 days <br />0.452 hours <br />0.00269 weeks <br />6.190735e-4 months <br /> on July 7, 1988.
The PMT was never functionally inoperable except during corrective maintenance on July 2, 1988, when the PMT Boom was lowered to replace temperature elements.
At other times, sufficient local and recorded indications were continuously available and periodically monitored to meet Technical Specification (TS) requirements.
Since the PMT Instrumentation was not administratively returned to service within seven days, this report is submitted pursuant to TS 3.3.3.4.a and 6.9.2.
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NARRATIVE At 1405 hours0.0163 days <br />0.39 hours <br />0.00232 weeks <br />5.346025e-4 months <br />'on June 28, :1988, Waterford Steam Electric Station was operating at 100% power when the Primary Meteorological Tower (PMT) was declared out-of-service during corrective maintenance on PMT Instrumentation.
One PMT Delta Temperature Instrument (DTI)
EM-ITE-0102, had been declared out-of-service at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> on June 20, 1988, since the DTI readings were' found to be out of tolerance on the Technical Specification (TS) Logs on June 20, 1986, and an entry in the Equipment Out-of-Service (EOS) Log was made for the PMT DTI. Only one of the three PMT DTIs are required to be operable per TS 3.3.3.4; therefore, this Limiting Condition for Operation (LCO) was still satisfied. Corrective maintenance replaced and calibrated.four Temperature Elements and a Transmuter Card which is used to convert process inputs to signals used by the Plant Monitoring Compu:er (PMC). Since it was necessary to lower the boom on which the 199 foot level PMT senscrs are installed to replace the four Temperature Elements, the PMT was declared out-of-c?rvice on June 28, 1988, and the seven-day action statement of TS 3.3.3.4 was entered. The Temperature Elements were replaced on July 2, 1988, corrective maintenance on the DTI was completed, and the DTI entry was cleared from the EOS log at 1845 hours0.0214 days <br />0.513 hours <br />0.00305 weeks <br />7.020225e-4 months <br /> on July 2, 1988.
At 0944 hours0.0109 days <br />0.262 hours <br />0.00156 weeks <br />3.59192e-4 months <br /> on June 27, 1988, the PMT 33 Foot Wind Speed Instrument (WSI) was declared out-of-service since its computer point identification output read consistently higher than actual values.
Only one of the two 33 foot WSIs are j
required to be operable per TS 3.3.3.4; therefore, this LCO.was still satisfied.
4 Maintenance personnel decided to complete WSI maintenance, which did not affect the operability of other PMI instrumentation, after the July 4 weekend in order to complete DTI maintenance to place the PMT back in service.
Corrective maintenance on the WSI recalibrated a transmuter card on July 5, 1988, and replaced and calibrated a power supply circuit card on July 6, 1988. After retests were completed, the WSI was cleared from the EOS log at 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> on July 8, 1988.
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The PMT was declared out-of-service due to maintenance on the DTI; however,.a failure in communications between Operations and Maintenance personnel resulted in Operations personnel conservatively maintaining the Dri out-of-service until the scope of other PMT maintenance could be clarified.
It was not clear to Operations persennel how troubleshooting of the PMT WSI affected the operability of other PMT instrumentation.. Prior to this clarification, however, the PMT was struck by lightning during the evening hours of July 4, 1988. This caused damage to PMT Wind and Temperature Indication.
Due to continuing inclement weather, repairs could not be effected for several days.
Sufficient repairs on the PMT instrumentation were completed, and the PMT was declared operable at 1627 hours0.0188 days <br />0.452 hours <br />0.00269 weeks <br />6.190735e-4 months <br /> on July 7, 1988.
The PMT was not functionally inoperable in this event before July 4, 1988, except during corrective maintenance on July 2, 1988, when the PMT Boom was lowered to replace the four Temperature Elements. At other times, sufficient local and recorded indications were continuously available and periodically monitored to meet TS requirements. Since the PMT had not been administrative 1y returned to service within seven days, this report is submitted pursuant to TS 3.3.3.4.a and 6.9.2.
Had the PMT not been struck by lightning, the PMT would have been returned to service prior to expiration of the seven-day limit.
Between June 28 and July 2, if circumstances had occurred requiring meteorological information, the required information was available and the instrumentation could have been promptly declared operable by consultation with the appropriate maintenance personnel.
Since the Secondary Meteorological Tower provides all required instrumentation except 199 foot wind' direction and was available during this period, there was available data for estimating potential radiation doses to the public as a result of a routine or accidental release of radiological material to the atmosphere.
No unplauned releases occurred during this period.
Thus, there was no safety significance to this event.
PLANT CONTACT D. W. Vinci, Maintenance Superintendent, 504/464-3138.
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