ML20005G768

Special Rept SR-90-001-00:on 891229,condenser Vacuum Pump Wide Range Gas Monitor Inoperable Due to Spurious Alarms. Functional Test Per Maint Instruction (MI)-003-386 Satisfactorily Performed

ML20005G768
Person / Time
Site:	Waterford
Issue date:	01/12/1990
From:	Mcgaha J LOUISIANA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
SR-90-001-00, SR-90-1, W3A90-103, NUDOCS 9001230054
Download: ML20005G768 (3)

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10CrR50.36(c)(2) l LOUISIANA P O W E A & L i G H T! WATERFORD 3 SES + PD BOX B + KILLONA, LA 70066-0751

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W3A90-103 A4.05 i

QA January 12, 1990 U.S. Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, D.C.

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SUBJECT:

Waterford 3 SES Docket No. 50-382 License No. NPF-38 Reporting of Special Report Attached is Special Report Number SR-90-001-00 for Waterford Steam Electric Station Unit 3.

This Special Report is submitted.per 10CFR50.36(c)(2) and Technical Specifications 3.3.3.1 and 6.9.2.

Very truly yours, g

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. McCaha Plant Manager - Nuclear JRM/JEFig1p F

Attachment l'

l-cci Messrs. R.D. Martin

-J.T. Wheelock - INPO Records Center E.L. Blake W.M. Stevenson D.L. Wigginton NRC Resident Inspectors I

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SPECIAL REPORT' g_.

SR-90-001-00 Inoperability of Condenser Vacuum Pump Wide Range Gas Monitor Due to Spurious Alarms INTRODUCTION At approximately 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on December 29. 1989, Waterford Steam Electric Station Unit 3 was. operating atJ100% reactor power when Operations' personnel

- declared Condenser Vacuum Pump Wide Range Gas Nonitor L(WRGM)~,_ PRM-IRE-0002,.

. inoperable. -In accordance with Technical' Specification 3.3.3.1 Action 27, Health Physics. personnel established the preplanned: alternate method-for monitoring Condenser Vacuum Pump discharge exhaust as' defined in Emergencyr Planning procedure (EP)-002-050, "Off-Site Dose Assessment (Manual)."' The monitor was returned to service at approatmately 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />'on1 January 5,1990.

Since the monitor was not returned to service within seven days, this report is submitted pursuant to Technical Specifications 3.3.3.1 and 6.9.2.

' NARRATIVE On December 29, 1989 Waterford Steam Electric Station Unit 3 was operating at 100% reactor power when Operations _ personnel"noted three spikes on'the Condenser Vacuum Pump WRGM resulting in alarm conditions. The alarms were verified to-be-spurious by-sampling the Condenser Vacuum. Pump discharge exhaust for. activity.

At 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on December 29, 1989, Operations personnel declared the WRGM inoperable.

In accordance with Technical Specification 3.3.3.1' Action 27,-

Health Physics personnel established the preplanned alternate method for monitoring Condenser Vacuum Pump discharge exhaust as defined in procedure.

EP-002-050, "Off-Site Dose Assessment (Manual)."

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..Du' ring subsequent troubleshooting, Instrument and Control (I&C) personnel were

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unable to determine an exact cause for the WRGH alarms observed on h

December 29, 1989, although a very small' amount of water was found in the i

sample line rotometer.

This water is believed to be residual moisture left in the sample lines following a modification to the Condenser Vacuum Pump WRGM and is not suspected to have caused the spikes observed. A functional test per Maintenance Instruction' (MI)-003-386 was satisfactorily performed and the WRCM-was placed in service at 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br /> on January'5, 1990.

.)

Since the monitor was not returned to service within the seven day limit as defined in Technical Specification 3.3.3.1, thisLSpecial Report is submitted' pursuant to Specification 6.9.2.

Monitor performance will be trended for j

future recurrence of the spiking problem by Availability Engineering.

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Appropriate corrective action will be taken at that time.

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~t Because Health Physics personnel employed an alternate method of monitoring f

Condenser Vacuum Pump discharge exhaust and no measurable primary to secondary leakage presently exists, the inoperability of the wide range gas monitor did-l not pose a safety concern.

l PLANT CONTACT l

T.R. Leonard, Maintenance Superintendent, 504/464-3138.-

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