ULNRC-06151, Special Report 2014-03: Inoperability of a Seismic Instrument for Greater than 30 Days

Special Report 2014-03: Inoperability of a Seismic Instrument for Greater than 30 Days

ML14296A010
Person / Time
Site:	Callaway
Issue date:	10/22/2014
From:	Cox B Ameren Missouri, Union Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ULNRC-06151
Download: ML14296A010 (4)

Text

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'WAmeren Callaway Plant MISSOURI October 22, 2014 ULNRC-06151 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.

FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2014-03:

INOPERABILITY OF A SEISMIC INSTRUMENT FOR GREATER THAN 30 DAYS Enclosed is a special report addressing the inoperability of a seismic monitoring instrument at Callaway Plant.

No new commitments are identified in this correspondence. N one of the material in this report is considered proprietary by Union Electric Company (Ameren Missouri).

If you have any questions or require additional information, please contact Mr. Thomas Elwood, Supervising Engineer, Regulatory Affairs and Licensing at 314-225-1905.

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Barry L. Cox Senior Director, Nuclear Operations BLC/csp Enclosure

.......................................................................................................................... PO Box 620 Fulton, MO 65251 AmerenMissouri.com .................

STARS

• Alliance

ULNRC-06151 October 22, 2014 Page2 cc: Mr. Marc L. Dapas Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Fred Lyon Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738

ULNRC-06151 October 22, 2014 Page 3 Index and send hardcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 4150 International Plaza Suite 820 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)

Electronic distribution for the following can be made via Responses and Reports ULNRC Distribution:

F. M. Diya D. W. Neterer T. E. Herrmann L. H. Graessle B.L.Cox M. A. McLachlan S. A. Maglio T. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)

Enclosure to ULNRC-06151 Special Report 2014-03 Requirement Callaway Plant's Final Safety Analysis Report (FSAR) Section 16.3 .3 .2 contains requirements for seismic instrumentation. The Limiting Condition for Operation (LCO) specified per FSAR 16.3 .3 .2 requires seismic monitoring instrumentation to be Operable at all times. With a required instrument inoperable for more than 30 days, Action A applies. It states, "With one or more of the above required seismic monitoring instruments inoperable for more than 30 days, prepare and submit a Special Report to the Commission within the next 10 days outlining the cause of the malfunction and the plans for restoring the instrument(s) to OPERABLE status."

The seismic instrument mentioned below is one of several seismic instruments located at the Callaway Plant that are used to determine the magnitude of a seismic event.

Cause of the Seismic Monitoring Instrument In operability A channel calibration for seismic instrument SGAR0005, Containment Structure Peak Recording Accelerometer, was completed on October 11, 2014. The sensor that was removed from the plant was tested to determine the "as-found" readings. The removed sensor was found to be out-of-calibration for the vertical and transverse readings. A corrective action document was initiated on October 12, 2014. Subsequent review determined that the vertical trace from the instrument had no indication of contact with the plate's magnetic tape. It is not clear when of how the vertical stylus was bent out-of-position such that it no longer contacted the plate's tape. There is potential for the out-of-tolerance condition to have existed for a significant portion of the period of time since the instrument's last calibration (April2013)

Plans for Restoring the Instrument to OPERABLE status SGAR0005 was returned to service on October 11, 2014.