ULNRC-06309, Special Report 2016-03: Inoperability of a Seismic Instrument for Greater than 30 Days
| ML16159A305 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 06/07/2016 |
| From: | Wink R Ameren Missouri |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| ULNRC-06309 SR 2016-03 | |
| Download: ML16159A305 (4) | |
Text
wAffigren MISSOURI June 7, 2016 Callaway Plant U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:
ULNRC-06309 DOCKET NUMBER 50-483 CALLA WAY PLANT UNIT 1 UNION ELECTRIC CO.RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2016-03: 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.
None 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.Thoma Elwood, Supervising Engineer, Regulatory Affairs and Licensing at 314-225-1905.
DRB/tlw Enclosure Sincerely, r)tfrJ/oger C.Wink 1 Manager, Regulatory Affairs P.1.Box 620 Fulton, Fy10 65251 AmerenMissouri.com ULNRC-06309 June 7, 2016 Page 2 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.L.John Kios Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S.Nuclear Regulatory Commission Mail Stop O8H4 Washington, DC 20555-0001 ULNRC-063 09 June 7, 2016 Page 3 Index and send hardcopy to QA File A160.6761 Hardcopy: Certrec Corporation 6100 Western Place, Suite 1050 Fort Worth, TX 76107 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)
Electronic distribution for the fo]]owing can be made via Other Situations ULNRC Distribution:
F.M.Diya B.L.Cox R.C.Wink T.B.Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr.John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)Missouri Public Service Commission Enclosure to U LN RC-06309 Special Report 2016-03 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."Cause of the Seismic Monitoring Instrument Inoperability Seismic instrument SGAR0005, Containment Structure Peak Recording Accelerometer, was removed from service on 04/12/2016 for a routine surveillance and calibration.
SGAR0005 was found to be out of tolerance for both the Transverse and Vertical measurements.
The instrument was returned to service the same day.However, subsequent review of the amount of drift in these two scratch arms, as well as the previous maintenance history of this instrument indicates a significant likelihood that this instrument was inoperable for greater than 30 days prior to its routine surveillance and calibration, thus exceeding the 30-day threshold for submittal of a Special Report.Several additional Peak Recording Accelerometers, including SGAR0002 through 4 and SGAR0006 through 8, were available during this period of likely inoperability to provide an alternate means for monitoring during a seismic event.This instrumentation ensures that sufficient capability was available to promptly determine the magnitude of a seismic event and evaluate the response of those features important to safety (thus to determine if plant shutdown is required pursuant to Appendix A of 10 CFR Part 100).Plans for Restoring the Instrument to OPERABLE status As noted above, SGAR0005 was returned to service on 04/12/2016.
Current plans are to replace this instrument during Refuel 22, which is planned for the fall of 2017.
wAffigren MISSOURI June 7, 2016 Callaway Plant U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:
ULNRC-06309 DOCKET NUMBER 50-483 CALLA WAY PLANT UNIT 1 UNION ELECTRIC CO.RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2016-03: 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.
None 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.Thoma Elwood, Supervising Engineer, Regulatory Affairs and Licensing at 314-225-1905.
DRB/tlw Enclosure Sincerely, r)tfrJ/oger C.Wink 1 Manager, Regulatory Affairs P.1.Box 620 Fulton, Fy10 65251 AmerenMissouri.com ULNRC-06309 June 7, 2016 Page 2 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.L.John Kios Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S.Nuclear Regulatory Commission Mail Stop O8H4 Washington, DC 20555-0001 ULNRC-063 09 June 7, 2016 Page 3 Index and send hardcopy to QA File A160.6761 Hardcopy: Certrec Corporation 6100 Western Place, Suite 1050 Fort Worth, TX 76107 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)
Electronic distribution for the fo]]owing can be made via Other Situations ULNRC Distribution:
F.M.Diya B.L.Cox R.C.Wink T.B.Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr.John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)Missouri Public Service Commission Enclosure to U LN RC-06309 Special Report 2016-03 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."Cause of the Seismic Monitoring Instrument Inoperability Seismic instrument SGAR0005, Containment Structure Peak Recording Accelerometer, was removed from service on 04/12/2016 for a routine surveillance and calibration.
SGAR0005 was found to be out of tolerance for both the Transverse and Vertical measurements.
The instrument was returned to service the same day.However, subsequent review of the amount of drift in these two scratch arms, as well as the previous maintenance history of this instrument indicates a significant likelihood that this instrument was inoperable for greater than 30 days prior to its routine surveillance and calibration, thus exceeding the 30-day threshold for submittal of a Special Report.Several additional Peak Recording Accelerometers, including SGAR0002 through 4 and SGAR0006 through 8, were available during this period of likely inoperability to provide an alternate means for monitoring during a seismic event.This instrumentation ensures that sufficient capability was available to promptly determine the magnitude of a seismic event and evaluate the response of those features important to safety (thus to determine if plant shutdown is required pursuant to Appendix A of 10 CFR Part 100).Plans for Restoring the Instrument to OPERABLE status As noted above, SGAR0005 was returned to service on 04/12/2016.
Current plans are to replace this instrument during Refuel 22, which is planned for the fall of 2017.