ULNRC-06435, Submittal of Special Report 2018-01 Non-Functionality of Loose Parts Monitoring Channel for Greater than 30 Days

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Submittal of Special Report 2018-01 Non-Functionality of Loose Parts Monitoring Channel for Greater than 30 Days
ML18122A326
Person / Time
Site: Callaway Ameren icon.png
Issue date: 05/02/2018
From: Wink R
Ameren Missouri
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
ULNRC-06435
Download: ML18122A326 (4)
v • d • e


Text

Amere FvTISSOURI n Callaay Plant May 2. 2018 U LNRC-0643 5 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington. DC 20555-0001 10 CfR 50.36 Ladies and Gentlemen:

DOCKET NUMBER 50-183 CALLA WAY PLANT UNIT I UNION ELECTRIC CO.

RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2018-01 NON-FUNCTIONALITY OF LOOSE PARTS MONITORING CHANNEL FOR GREATER THAN 30 DAYS Enclosed is a special report addressing the non-functionality of a loose parts monitoring channel at Callaway Plant.

No new commitments are identified in this correspondence. and none of the material in this report is considered proprietary by Union Electric Company (Ameren Missouri).

If there are any questions, please contact Mr. Thomas Elwood. Supervising Engineer. Regulatory Affairs and Licensing at 314-225-1905.

Sincerely.

Roger Wink.

Manager, Regulatory Affairs Enclosure STARS Alliance

ULNRC-0643 5 May 2. 201$

Page 2 cc: Mr. Kriss N/I. Kennedy Regional Administrator U. S. Nuclear Renulatorv Commission Region IV 1 600 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. Cal laway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 08H4 Washington. DC 20555-0001

ULNRC-0643 5 May 2,201$

Page 3 Index and send hatdcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 6100 Western Place. Suite 1050 Fort Worth. TX 7610?

(Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)

Etectronic distribution for the following can be made via Othet Situations ULNRC Distribution:

F. M. Diya S. P. Banker B. L. Cox R. C. Wink I. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mi. Jay Silberg (PilIstury Winthrop Shaw Pittman LLP)

Missouri Public Service Commission

Enclosure ULNRC-06435 Special Report 20 18-01 Requirement Callaway Plants Final Safety Analysis Report (FSAR) Section 16.3.3.5 contains requirements for reactor coolant system (RCS) loose-part detection instrumentation. The Limiting Condition for Operation (LCO) specified per FSAR 16.3.3.5 requires the loose-part detection system to be functional in MODES I and 2. With a required channel nonfunctional for more than 30 days, Action A applies. It states. With one or more Loose-Part Detection System channels non-fttnctional 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 channel(s) to OPERABLE status.

Cause of the Loose-Part Detection Instrument Non-Functionality Channel 3 of the loosepart monitoring system (reactor vessel head) was declared inoperable and removed from service on March 29. 2018 due to excessive nuisance alarms from conservative selpoints for manual and alarm thresholds.

Plans for Restoring the Channel to Functional Status Restoration of Channel 3 of the looseparts monitoring system will require that plant data be collected and transmitted to the equipment vendor for analysis. The vendor will prepare a baseline data report documenting system sensitivity and conformance to Regulatory Guide 1 .133. This report will contain the setpoints required to restore the channel to functionality. It is expected that the system witl be restored to functionality by July 5,2018.

Amere FvTISSOURI n Callaay Plant May 2. 2018 U LNRC-0643 5 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington. DC 20555-0001 10 CfR 50.36 Ladies and Gentlemen:

DOCKET NUMBER 50-183 CALLA WAY PLANT UNIT I UNION ELECTRIC CO.

RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2018-01 NON-FUNCTIONALITY OF LOOSE PARTS MONITORING CHANNEL FOR GREATER THAN 30 DAYS Enclosed is a special report addressing the non-functionality of a loose parts monitoring channel at Callaway Plant.

No new commitments are identified in this correspondence. and none of the material in this report is considered proprietary by Union Electric Company (Ameren Missouri).

If there are any questions, please contact Mr. Thomas Elwood. Supervising Engineer. Regulatory Affairs and Licensing at 314-225-1905.

Sincerely.

Roger Wink.

Manager, Regulatory Affairs Enclosure STARS Alliance

ULNRC-0643 5 May 2. 201$

Page 2 cc: Mr. Kriss N/I. Kennedy Regional Administrator U. S. Nuclear Renulatorv Commission Region IV 1 600 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. Cal laway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 08H4 Washington. DC 20555-0001

ULNRC-0643 5 May 2,201$

Page 3 Index and send hatdcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 6100 Western Place. Suite 1050 Fort Worth. TX 7610?

(Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)

Etectronic distribution for the following can be made via Othet Situations ULNRC Distribution:

F. M. Diya S. P. Banker B. L. Cox R. C. Wink I. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mi. Jay Silberg (PilIstury Winthrop Shaw Pittman LLP)

Missouri Public Service Commission

Enclosure ULNRC-06435 Special Report 20 18-01 Requirement Callaway Plants Final Safety Analysis Report (FSAR) Section 16.3.3.5 contains requirements for reactor coolant system (RCS) loose-part detection instrumentation. The Limiting Condition for Operation (LCO) specified per FSAR 16.3.3.5 requires the loose-part detection system to be functional in MODES I and 2. With a required channel nonfunctional for more than 30 days, Action A applies. It states. With one or more Loose-Part Detection System channels non-fttnctional 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 channel(s) to OPERABLE status.

Cause of the Loose-Part Detection Instrument Non-Functionality Channel 3 of the loosepart monitoring system (reactor vessel head) was declared inoperable and removed from service on March 29. 2018 due to excessive nuisance alarms from conservative selpoints for manual and alarm thresholds.

Plans for Restoring the Channel to Functional Status Restoration of Channel 3 of the looseparts monitoring system will require that plant data be collected and transmitted to the equipment vendor for analysis. The vendor will prepare a baseline data report documenting system sensitivity and conformance to Regulatory Guide 1 .133. This report will contain the setpoints required to restore the channel to functionality. It is expected that the system witl be restored to functionality by July 5,2018.

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