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)

Text

.. _.

.- l f LOUISIANA Ref: 10CrR50.36(c)(2)

P O W E A & L i G H T! WATERFORD 3 SES + PD BOX B + KILLONA, LA 70066-0751 l

$NNIysNU l W3A90-103 A4.05 i QA  ;

January 12, 1990 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-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,

. McCaha g

h,J . Manager - Nuclear Plant 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

l

\

/

9001230054 900112 P

/

PDR ADOCK 05000382 S FDC L k

a.

a. . .

NP g_ . ,,/ SPECIAL REPORT' 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)."

1

W

,.,9 .

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

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. ]'

Appropriate corrective action will be taken at that time.

i

~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.- t

,i 5

?

?

2