PNP 2014-038, Special Report for Inoperability of High Range Noble Gas Monitor

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Special Report for Inoperability of High Range Noble Gas Monitor
ML14104A600
Person / Time
Site: Palisades Entergy icon.png
Issue date: 04/14/2014
From: Dotson B
Entergy Nuclear Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
PNP 2014-038
Download: ML14104A600 (2)


Text

  • Entergy Nuclear Operations, Entergy Nuclear Operations, Inc.

Inc.

Palisades Nuclear Plant Palisades Nuclear Plant fl ergji 27780 27780 Blue Covert, Ml Tel 269 Memorial Highway Star Memorial Blue Star MI 49043-9530 269 764 49043-9530 764 2000 2000 Highway Barbara Barbara E. Dotson Dotson Regulatory Assurance Manager PNP 2014-038 April 14, 2014 14,2014 U. S. Nuclear Regulatory Commission Contro.1Desk ATTN: Document Controi Washington, DC 20555-0001

SUBJECT:

Special Report for Inoperability of High Range Noble Gas Monitor

- Palisades Nuclear Plant Docket 50-255 License No. DPR-20

REFERENCES:

Offsite Dose Calculation Manual Palisades Oftsite

Dear Sir or Madam:

Offsite Dose Calculation Manual, Appendix A, Table A-i, The Palisades Oftsite A-1, Action 4, requires that a special report be submitted to the Nuclear Regulatory Commission within 30 days for the inoperability of RIA-2327, High Range Noble Gas Monitor, when the instrument is not restored to operable status within 7 days. The enclosed report summarizes the immediate action taken, the cause of the inoperability, and the current status of the instrument.

This letter contains no new commitments and no revisions to existing commitments.

Sincerely, bed/tad

Attachment:

Special Report for Inoperable RIA-2327, High Range Noble Gas Monitor CC Ill, USNRC Administrator, Region III, Project Manager, Palisades, USNRC USN RC Resident Inspector, Palisades, USNRC

ATTACHMENT SPECIAL REPORT FOR INOPERABLE RIA-2327, HIGH RANGE NOBLE GAS MONITOR BACKGROUND RIA-2327, High Range Noble Gas Monitor, was declared inoperable on March 24, 2014, after monitors fail light was illuminated and annunciation of its associated control room alarm. The monitor's E0007.

the digital display indicated HE0007."

IMMEDIATE ACTION TAKEN Palisades Offsite Dose Calculation Manual, the preplanned alternate method As required per Palisades' of monitoring was placed in-service as a compensatory measure.

CAUSE OF INSTRUMENT INOPERABILITY The cause for the inoperability of RIA-2327 was a failed detector preamplifier.

PLANS AND SCHEDULE FOR RESTORING INSTRUMENT OPERABILITY On April 2, 2014, following replacement of the failed detector preamplifier and satisfactory functional testing, RIA-2327 was returned to operable status.

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