ML20211B378

Special Rept 99-002:on 990730,NPV Radiation Monitoring Sys Was Declared Inoperable.Caused by Voltage Induced in Detector Output by Power Cable to Low Range Sample Pump. Separated Cables & Secured in Place to Prevent Recurrence

ML20211B378
Person / Time
Site:	Hope Creek
Issue date:	08/13/1999
From:	Bezilla M Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LR-N99374, NUDOCS 9908240292
Download: ML20211B378 (2)

Text

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OPSEG F?ublic Service Electric and Gas Company P.O. Box 236 Hancocks Bridge, New Jersey 08038-0236 Nuclear Business Unit 3E LR-N99374 i United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 SPECIAL REPORT 99-002 HOPE CREEK GENERATING STATION l ' FACILITY OPERATING LICENSE NPF-57 l

DOCKET NO. 50-354 Gentlemen:

This Special Report is being submitted pursuant to the requirements of Hope Creek Technical Specification 3.3.7.5-1, Action 81 b, due to the North Plant Vent (NPV) High l Range Noble Gas Monitor being inoperable for more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

On July 30,1999, the NPV Radiation Monitoring System (RMS) was declared inoperable due to spiking observed in the low, mid and high range noble gas monitors.

Technical Specification Action Statements 3.3.7.5, " Accident Monitoring Instrumentation", and 3.3.7.11, " Radioactive Gaseous Effluent Monitoring Instrumentation", were entered, and compensatory measures were initiated in accordance with plant Technical Specifications.

The NPV RMS inoperability was caused by a voltage induced in the detector output by the power cable to the low range sample pump. The power cable may have been moved into proximity to the detector cables during a NPV system functional test performed earlier in the week. The problem was corrected by separating the cables and ,

securing them in place to prevent recurrence. The NPV RMS was tested satisfactorily, and the system was restored to OPERABLE status on August 4,1999. The NPV I system functional test procedure is being evaluated to determine if changes to the procedure are needed.

Should you have any questions or comments on this transmittal, please contact Paul Duke at 856-339-1466. \ Q Sincerely, l

I \

M. Bezilla Vice President - Nuclear Operations 9, 9908240292 990813 PDR ADOCK 0500o354 S PDR

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95 2168 RE'V 694

Document Control Desk LR-N99374 PRD/

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