NL-17-134, Radiation Monitor R-26 Inoperable

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Radiation Monitor R-26 Inoperable
ML17290A360
Person / Time
Site: Indian Point Entergy icon.png
Issue date: 10/11/2017
From: Vitale A
Entergy Corp
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-17-134
Download: ML17290A360 (2)


Text

  • -===*Entergy:

Indian Point Energy Center 450 Broadway, GSB P.O. Box249 Buchanan, N.Y. 10511-0249 Tel (914) 254-6700 Anthony J. Vitale Site Vice President NL-17-134 October 11, 2017 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852

Subject:

Radiation Monitor R-26 Inoperable Indian Point Unit No. 3 Docket No. 50-286 License No. DPR-64

Dear Sir or Madam:

The purpose of this letter is to submit a report pursuant to Technical Specification (TS) 5.6.7. Post Accident Monitoring Instrumentation (PAM) Report. When a report is required by LCO 3.3.3, "PAM Instrumentation," a report shall be submitted within the next 14 days. This report shall outline the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule fo~ restoring the instrumentation channels of the function to operable status.

On August 28, 2017 at 1033 hours0.012 days <br />0.287 hours <br />0.00171 weeks <br />3.930565e-4 months <br />, Operations entered TS 3.3.3. Condition A for Radiation Monitor R-26 being inoperable due to the troubleshooting for R-26 spiking into alarm. On September 28, 2017, at 1033 hours0.012 days <br />0.287 hours <br />0.00171 weeks <br />3.930565e-4 months <br />, R-26 remained in TS 3.3.3 Condition A for one or more functions of Table 3.3.3-1 with one or more required channels inoperable for an inoperable Function 10. Required Action A.1 is to restore required channel to operable in 30 days. 3TS-17-5557 was initiated on August 28, 2017 to track Allowed Outage Time (AOT).

On September 28, 2017, Condition Report (CR) CR-IP3-2017-04541 recorded that the inoperable R-26 associated with Limiting Condition of Operation (LCO) 3.3.3 exceeded the requirement to be returned to operable with 30 days as of 1033 hours0.012 days <br />0.287 hours <br />0.00171 weeks <br />3.930565e-4 months <br />. TS 3.3.3 Condition B (Required Action and associated Completion Time of Condition A not met) required action 8.1 is to initiate action in accordance with TS 5.6. 7. TS 5.6. 7 requires a report to be submitted to NRC within the next 14 days. The report is to outline the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the instrument to operable status.

NL-17-134 Docket No. 50-286 Page 2 of 2

  • Alternate method of monitoring While R-26 is inoperable, redundant Radiation Monitor R-25. is operable thereby providing the capability to perform the function. Two operable channels ensure no single failure prevent operators from getting the information necessary for them to

. determine the safety status of the unit following an accident. The containment area radiation monitors are passive in nature in that two critical automatic action is assumed to occur and there is a low probability of and event requiring this PAM instrumentation during the interval with one inoperable channel.

  • Cause The apparent cause of inoperability of R-26 due to intermittent spiking and alarms from initial troubleshooting has been determined that a faulty detector signal coming from the radiation cable connections between the detector and meter.
  • Plans and Schedule for Restoring Instrument to Operable A vendor has been hired and started .work on October 04, 2017 to repair and/or replace R-26 wiring connections. Once this has been completed, any further troubleshooting will be completed as necessary and the radiation monitor will be calibrated. Work to return R-26 to operable is scheduled to be completed by October 31, 2017.

There are no new commitments contained in this letter. Should you or your staff have any questions regarding this matter, please contact Mr. Robert Walpole, Manager, Regulatory Assurance at (914) 254-6710.

AJV/trj cc: Mr. Daniel H. Dorman, Regional Administrator, NRG Region I Mr. Richard V. Guzman, Senior Project Manager, NRG NRR DORL NRG Resident Inspectors Office, Indian Point Energy Center Mr. Timothy Rice, Bureau of Hazardous Waste & Radiation Management, NYSDEC Ms. Bridget Frymire, New York State Public Service Commission Ms. Alicia Barton, President and CEO, NYSERDA