ML20059B952

Special Rept SR-93-001-01,final Rept:On 930811,declared Condenser Vacuum Pump Wide Range Gas Monitor PRM-IRE-002 Inoperable.Monitor Returned to Svc on 930901.Inoperability of Subj Monitor Did Not Pose Safety Concern

ML20059B952
Person / Time
Site:	Waterford
Issue date:	10/26/1993
From:	Packer D ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
SR-93-001-01, SR-93-1-1, W3F1-93-0190, W3F1-93-190, NUDOCS 9310290171
Download: ML20059B952 (3)

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no sox e Operations xmo"e.t^ zoooo Td !L4-4fA-31?O D. F. Packer G.y e w u;ccou n a cwea Wdn'ycJ 3 W3F1-93-0190 A4.05 PR.

October 26, 1993 U.S. Nuclear Regulatory Commission Attn:

Document Control Desk Washington, D.C.

20555

Subject:

Waterford 3 SES Docket No. 50-382 License No. NPF-38 Reporting of Special Report Gentlemen:

Attached is Special Report Number SR-93-001-01 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.

This is a final report.

Very truly yours, tp) [b(

p v, D.F. Packer General Manager Plant Operations DFP/TWG/ssf Attachment cc:

J.L. Milhoan (NRC Region IV), G.L. Florreich, J.T. Wheelock (INPO Records Center), R.B. McGehee, N.S. Reynolds, NRC Resident Inspectors Office, Administrator - LRPD 290085 9310290171 931026 0'

PDR ADOCK 05000382 8

S PDR Q

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r SPECIAL REPORT SR-93-001-01 Inoperability of Condenser Vacuum Pump Wide Range Gas Monitor INTRODUCTION 1

At 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> on August 11, 1993, Waterford Steam Electric Station Unit 3 was operating at 100% reactor power when Operations personnel declared Condenser Vacuum Pump Wide Range Gas Monitor (WRGM), PRM-IRE-002, inoperable. After extensive troubleshooting efforts, the WRG'1 was restored to operable status on September 1,1993.

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Since the monitor was not returned to service within seven days, this Special Report is provided pursuant to the requirements of Technical l

Specifications 3.3.3.1 and 6.9.2.

NARRATIVE On August 11, 1993, Waterford Steam Electric Station Unit 3 was operating at 100% reactor power when I&C personnel, during performance of a channel functional test of the Condenser Vacuum Pump High Range Radiation Monitor loop, noted that the monitor spiked into an alarm condition. At 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> i

on August 11, 1993, 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 Emergency i

Plan Implementing Procedure EP-002-050, "Off-Site Dose Assessment j

(Manual ). " Additionally, the condenser vacuum pump discharge was diverted to the plant stack which provides a filtered and monitored flow path.

During subsequent troubleshooting efforts to restore the operability of this monitor, Instrument and Controls (l&C) technicians, with the j

assistance of a technical consultant, identified several potential problems which significantly complicated repair efforts. A number of components l

were replaced while others were checked and verified to be working l

properly. Ultimately, a failure of the low range detector was identified as the root cause of the monitor failure. However, the potential problems that were encountered effectively masked the root cause of the monitor failure and prevented restoration within the seven days specified in the j

Technical Specifications.

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b, Because Health Physics personnel employed an alternate method of monitoring Condenser Vacuum Pump discharge exhaust, the inoperability of the wide range gas monitor did not pose a safety concern.

1 PLANT CONTACT J.G. Hoffpauir, Maintenance Superintendent (504) 464-3138 l'

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