ML18100A827

Special Rept 94-01:on 940106,radiation Monitoring Channels 1R45B & 1R45C Declared Inoperable & Exceeded 7-day Time Frame for Restoring Inoperable Channels to Operable Status on 940113.Monitors Returned to Svc on 940118

ML18100A827
Person / Time
Site:	Salem
Issue date:	01/20/1994
From:	Vondra C Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
94-01, 94-1, NUDOCS 9401260026
Download: ML18100A827 (3)

Text

Public Service Electric and Gas Company P.O. Box 236 Hancocks Bridge, New Jersey 08038 Salem Generating Station January 20, 1994 U. s. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Dear Sir:

SALEM GENERATING STATlON LICENSE NO. DPR-70 DOCKET NO. 50-272 UNIT NO. 1 SPECIAL REPORT 94-01 This Special Report addresses inoperability of the Radiation Monitoring System channels 1R45B and 1R45C Plant Vent medium and high range noble gas monitors for greater than seven (7) days.

This report is submitted in accordance with Technical Specification (TS) 3.3.3.1, Action 23, and pursuant to TS 6.9.2.

General Manager -

Salem Operations MJPJ:pc Distribution 2 4014~

1 9401260026 940120 ~

PDR ADOCK 05000272 ,

S PDR .

The power is i; i your hands.

95-2189 REV 7-92

SPECIAL REPORT NUMBER 9 .

PLANT IDENTIFICATION:

Salem Generating Station - Unit 1 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Radiation Monitoring Channels 1R45B and 1R45C Inoperable Greater Than Seven Days Event Date: 1/6/94 Report Date: 1/20/94 This report.was initiated by Incident Report No.94-014, ~hich identifies* failure of the 1R45B and C Radiati.on Monitoring System (RMS) channels on January 6, 1994

• These channels were not returned to service within seven days; therefore, this Special Report is required per Technical Specification (TS) 3.3.3.1.b, Table 3.3-6, Action 23, which states:

"With the number of OPERABLE channels .less than required by the Minimum Channels OPERABLE requirements, initiate the preplanned alternate method of monitoring the appropriate parameter(s),

within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and:

1. either restore the inoperable Channel(s) to OPERABLE status within 7 days of the event, or

2. prepare and submit a.Special Report to the Commission pursuant to Specification 6.9.2 within 14 days following the event outlining the action taken, the.cause of the.

inoperability and the plans and schedule for restoring the system to OPERABLE status."

CONDITIONS PRIOR TO OCCURRENCE:

Mode 4 (Hot Shutdown) Reactor Power % Unit Load -o- MWe DESCRIPTION OF OCCURRENCE:

On January 13, 1994, at 0338 hours0.00391 days <br />0.0939 hours <br />5.588624e-4 weeks <br />1.28609e-4 months <br />, the seven day time frame of TS Table 3 . 3-6 ,_ Action 2 3 , was exceeded.

CAUSE OF INOPERABILITY:

On January 6, 1994, at 0338 hours0.00391 days <br />0.0939 hours <br />5.588624e-4 weeks <br />1.28609e-4 months <br />, 1R45B and 1R45C RMS channels (medium and high range Plant Vent noble gas monitors) were declared inoperable due to loss of signal communication between the local monitor and remote indication in the Control Room. This problem was corrected the same day by cleaning circuit card edge connectors in the remote monitor CT-2B. While performing post-maintenance testing, the

UNIT 2 SPECIAL REPORT 9 . CAUSE OF INOPERABILITY: (cont'd) technician identified a concern, requiring investigation, resolution, and revision of the procedure~ This was completed on January_ll, 1994. The test procedure was satisfactorily completed for 1R45C on January 13, 1994, at 2043 hours0.0236 days <br />0.568 hours <br />0.00338 weeks <br />7.773615e-4 months <br />, a~d for 1R45B on January 17, 1994, at 1358 hours0.0157 days <br />0.377 hours <br />0.00225 weeks <br />5.16719e-4 months <br />. On January 18, 1994, at 1415 hours0.0164 days <br />0.393 hours <br />0.00234 weeks <br />5.384075e-4 months <br />, the monitors were returned to service.

PLANS AND SCHEDULE FOR RESTORATION TO OPERABLE STATUS:

As explained above, the monitors were January 18, 1994.

MJPJ:pc SORC Mtg. 94-06