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| | case reference number = ULNRC-06441 | | | case reference number = ULNRC-06441 |
| | document report number = SR 2018-02-00 | | | document report number = SR 2018-02-00 |
| | document type = Letter, Licensee 30-Day Written Event Report | | | document type = Letter type:ULNRC, Licensee 30-Day Written Event Report |
| | page count = 4 | | | page count = 4 |
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| {{#Wiki_filter:}} | | {{#Wiki_filter:Am MISSOURI eren Callaav Plant June 5.2018 U LNRC-0644 1 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen: |
| | DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT I UNION ELECTRIC CO. |
| | RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2018-02: |
| | NON-FUNCTIONALITY OF AN ACCIDENT MONITORING INSTRUMENT FOR GREATER THAN 30 DAYS Enclosed is a special report addressing the non-fttnctionality of an accident monitoring instrument at the Caflaway plant. |
| | No new commitments are identified in this correspondence. and none of the material in the 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. |
| | Sincerely, Wink Manager, Regulatory Affairs Enclosure P.O. Box 620 fulton, MO 6525 AmerenMissouri.com |
| | |
| | ULNRC-0 6441 June 05, 201$ |
| | Page 2 of3 cc: Mr. Kriss M. Kennedy 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 |
| | $201 NRC Road Steedman, MO 65077 Mr. L. John Kios Project Manager, Call away Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop O9E3 Washington, DC 20555-0001 |
| | |
| | ULNRC-0644 I June 05. 2018 Page3 of3 Index and send hardcopy to QA File A160.0761 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 following can be made via Other Situations ULNRC Distribution: |
| | F. M. Diya T. E. Henmann B. L. Cox S. P. Banker R. C. Wink T. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. Jay Silberg (Pillsbciry Winthrop Shaw Pittman LLP) |
| | Missouri Public Service Commission |
| | |
| | Enclosure to ULNRC-06441 Page lof 1 Special Report 2018-02 Requirement Callaway Plants Final Safety Analysis Report (FSAR) Section 16.3.3.4 contains requirements for accident monitoring instrumentation. Specifically, the accident monitoring instrumentation channels shown in Table 16.3-7 are required to be FUNCTIONAL in MODES 1, 2, and 3. Action A of FSAR section 16.3.3.4 states, With the number of FUNCTIONAL accident monitoring instrumentation channels less than the Total Number of Channels shown in Table 16.3-7, restore the nonfunctional channel(s) to FUNCTIONAL status within 30 days or prepare and submit a Special Report to the Commission within the following 14 days, outlining the preplanned alternate method of monitoring, the cause of the non-functionality, and the plans and schedule for restoring the channels to FUNCTIONAL status. |
| | |
| | ===Background=== |
| | During the performance of routine calibration testing on 04/23/18 to perform a zero and span check on GSAIOO1O, Containment Hydrogen Concentration Train B Analysis Indicator, the analyzer response was not as expected. The output of the unit was slow to respond following the application of span gas, and subsequent investigations determined that the unit continued to experience operational concerns. |
| | Alternate Monitoring Plans Alternate train indicator GSAIOO19, Containment Hydrogen Concentration Train A Analysis Indicator, is being monitored, and it is currently providing (or capable of providing) reliable indication of containment hydrogen concentration. |
| | Cause of the NON-FUNCTIONALITY of the B hydrogen analyzer Troubleshooting is currently ongoing per job 18001773, Investigate GSAIOO1O not Responding Properly During Zero and Span Check. At this time, however, the cause of the NON-FUNCTIONALITY of the B hydrogen analyzer has not been determined. |
| | Plans and Schedule for Restoring the Instrument to FUNCTIONAL status Plans for restoring the Instrument to FUNCTIONAL status are to continue troubleshooting activities and then repair the instrument after the cause of failure is known. Investigation is continuing, and repair is planned under sub-tasks to job 18001773. At this time, Callaway Plant expects the Containment Hydrogen Concentration Train B Analysis Indicator to be returned to FUNCTIONAL status by July 31, 2018 contingent on determination of the cause of failure.}} |
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Category:Letter type:ULNRC
MONTHYEARULNRC-06891, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00052024-06-26026 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0005 ULNRC-06892, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC00062024-06-26026 June 2024 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC0006 ULNRC-06884, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00022024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0002 ULNRC-06885, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00032024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0003 ULNRC-06886, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00042024-06-12012 June 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0004 ULNRC-06882, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC00122024-05-16016 May 2024 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Canister HGMPC0012 ULNRC-06877, Final Safety Analysis Report Revision OL-27 and Technical Specification Bases Revision 252024-05-0606 May 2024 Final Safety Analysis Report Revision OL-27 and Technical Specification Bases Revision 25 ULNRC-06856, CFR 50.59 and 10 CFR 72.48 Summary Report2024-05-0101 May 2024 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06869, Submittal of Callaway, Unit 1, 2023 Annual Radiological Environmental Operating Report2024-04-30030 April 2024 Submittal of Callaway, Unit 1, 2023 Annual Radiological Environmental Operating Report ULNRC-06876, Registration of Dry Spent Fuel Storage Canister HGMPC00102024-04-25025 April 2024 Registration of Dry Spent Fuel Storage Canister HGMPC0010 ULNRC-06866, Submittal of Cycle 26 Commitment Change Summary Report2024-04-17017 April 2024 Submittal of Cycle 26 Commitment Change Summary Report ULNRC-06871, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00072024-04-17017 April 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0007 ULNRC-06872, Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC00082024-04-17017 April 2024 Independent Spent Fuel Storage Installation, Registration of Dry Spent Fuel Storage Canister HGMPC0008 ULNRC-06863, Submittal of Annual Exposure Report for 20232024-03-20020 March 2024 Submittal of Annual Exposure Report for 2023 ULNRC-06852, Owners Activity Reports (OAR-1 Forms) for Cycle/Refuel 262024-03-0505 March 2024 Owners Activity Reports (OAR-1 Forms) for Cycle/Refuel 26 ULNRC-06858, Completion of License Renewal Activities Prior to Entering the Period of Extended Operation2024-02-21021 February 2024 Completion of License Renewal Activities Prior to Entering the Period of Extended Operation ULNRC-06853, Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.7172024-01-29029 January 2024 Submittal of 2023 Fitness for Duty Performance Data Per Per 10 CFR 26.717 ULNRC-06847, Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01)2023-12-21021 December 2023 Supplement to Relief Request from Requirements of ASME BPV Code, Section XI, Subsection Iwl Regarding Examination and Testing of the Unbonded Post-Tensioning System (Relief Request C3R-01) ULNRC-06849, License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds2023-12-20020 December 2023 License Renewal Resolution for Commitments 34 and 35 Perform Evaluation of Crack Initiation and Propagation in Steam Generator Divider Plate and Tube-To-Tubesheet Welds ULNRC-06844, Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification2023-12-0707 December 2023 Request for Exemption from Specific Requirements in 2023 Security Rule, Enhanced Weapons, Firearms Background Checks, and Security Event Notification ULNRC-06827, Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2023-11-20020 November 2023 Supplement to License Amendment Request Regarding Support System Requirements for Residual Heat Removal and Control Room Air Conditioning Systems Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06824, Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A2023-08-17017 August 2023 Response to Request for Additional Information Regarding Operating Quality Assurance Manual (Oqam) Revision 36A ULNRC-06830, Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak2023-08-15015 August 2023 Transmittal of Updated Technical Specification Markup and Clean Pages for License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak ULNRC-06223, Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004)2023-07-25025 July 2023 Minor Correction to License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Test Frequencies (LDCN 2020-0004) ULNRC-06799, Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications2023-07-13013 July 2023 Submittal of Licensee Event Report 2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications ULNRC-06821, Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301)2023-06-21021 June 2023 Post-Audit Follow-Up Information in Support of Callaway'S License Amendment Request and Proposed Exemption to Allow Use of Framatome Gaia Fuel (LDCN 22-0002) (EPID L-2022-LLA-0150 and EPID L-2022-LLE-00301) ULNRC-06822, Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a2023-06-14014 June 2023 Additional Information Regarding Request for NRC Approval of Operating Quality Assurance Manual (Oqam) Revision 36a ULNRC-06818, Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate .2023-06-0505 June 2023 Response to Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate . ULNRC-06815, Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a2023-06-0505 June 2023 Request for NRC Approval of Operating Quality Assurance Manual, Revision 36a ULNRC-06816, Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015)2023-05-0909 May 2023 Withdrawal of Previously Submitted Enclosures Regarding License Amendment Request for Adoption of Alternative Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06812, Submittal of 2022 Annual Radiological Environmental Operating Report2023-04-27027 April 2023 Submittal of 2022 Annual Radiological Environmental Operating Report ULNRC-06806, Submittal of Radiological Emergency Response Plan, Revision 552023-04-12012 April 2023 Submittal of Radiological Emergency Response Plan, Revision 55 ULNRC-06807, Submittal of Single Positive Test Forms2023-04-0303 April 2023 Submittal of Single Positive Test Forms ULNRC-06798, Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan2023-03-30030 March 2023 Submittal of Status of Plant Decommissioning Funding and ISFSI Decommissioning Funding Plan ULNRC-06801, CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions2023-03-30030 March 2023 CFR 50.46 Annual Report Regarding ECCS Evaluation Model Revisions ULNRC-06804, Submittal of Nuclear Property Insurance Reporting2023-03-29029 March 2023 Submittal of Nuclear Property Insurance Reporting ULNRC-06751, Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control2023-03-29029 March 2023 Application to Revise Technical Specifications to Adopt TSTF-501-A, Rev. 1, Relocate Stored Oil & Lube Oil Volume Values to Licensee Control ULNRC-06803, Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection2023-03-29029 March 2023 Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection ULNRC-06805, Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days2023-03-21021 March 2023 Transmittal of Special Report 2023-02 Non-Functionality of Containment Hydrogen Analyzer Channel for Greater than 30 Days ULNRC-06802, Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument2023-03-0909 March 2023 Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument ULNRC-06794, Submittal of Fitness for Duty Program Data for 20222023-01-24024 January 2023 Submittal of Fitness for Duty Program Data for 2022 ULNRC-06795, Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms2023-01-24024 January 2023 Submittal of Fitness for Duty Reports for 2022, Including Single Positive Test Forms ULNRC-06787, Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015)2022-12-0808 December 2022 Response to Request for Additional Information Regarding License Amendment Request for Adoption of Alternate Source Term and Revision of Technical Specifications (LDCN 21-0015) ULNRC-06781, License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029)2022-12-0101 December 2022 License Amendment Request to Clarify Support System Requirements for the Residual Heat Removal System and Control Room Air Conditioning System Under Technical Specifications 3.4.8, 3.7.11, and 3.9.6 (LDCN 22-0029) ULNRC-06780, Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-0072022-11-30030 November 2022 Additional Supplement to License Amendment Request to Adopt TSTF-439 and TSTF-505, LDCN 20-007 ULNRC-06772, 10 CFR 50.59 and 10 CFR 72.48 Summary Report2022-11-23023 November 2022 10 CFR 50.59 and 10 CFR 72.48 Summary Report ULNRC-06777, Operating Quality Assurance Manual (Oqam) Revision 362022-11-16016 November 2022 Operating Quality Assurance Manual (Oqam) Revision 36 ULNRC-06779, ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves2022-11-14014 November 2022 ULNRC-06779: Contesting of Green NCV 05000483/2022010-03, Failure to Perform Required Inservice Testing of Residual Heat Removal Heat Exchanger Pneumatically (Air) Operated Outlet and Bypass Valves ULNRC-06765, License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004)2022-11-0303 November 2022 License Amendment Request to Revise Technical Specification 5.5.16, Containment Leakage Rate Testing Program, for Permanent Extension of Type a and Type C Leak Rate Testing Frequencies (LDCN 2020-0004) ULNRC-06773, Results of Steam Generator Tube In-Service Inspection2022-11-0101 November 2022 Results of Steam Generator Tube In-Service Inspection 2024-06-26
[Table view] Category:Licensee 30-Day Written Event Report
MONTHYEARULNRC-06502, Special Report 2019-02: Inoperability of a Seismic Instrument for Greater than 30 Days2019-05-0202 May 2019 Special Report 2019-02: Inoperability of a Seismic Instrument for Greater than 30 Days ULNRC-06441, SR 2018-02-00 for Callaway Plant, Unit 1, Non-Functionality of an Accident Monitoring Instrument for Greater than 30 Days2018-06-0505 June 2018 SR 2018-02-00 for Callaway Plant, Unit 1, Non-Functionality of an Accident Monitoring Instrument for Greater than 30 Days ULNRC-06435, Submittal of Special Report 2018-01 Non-Functionality of Loose Parts Monitoring Channel for Greater than 30 Days2018-05-0202 May 2018 Submittal of Special Report 2018-01 Non-Functionality of Loose Parts Monitoring Channel for Greater than 30 Days ULNRC-06406, Special Report 2017-03 for Callaway Plant, Unit 1 Regarding Inoperability of a Post Accident Monitoring (PAM) Instrument2017-12-28028 December 2017 Special Report 2017-03 for Callaway Plant, Unit 1 Regarding Inoperability of a Post Accident Monitoring (PAM) Instrument ULNRC-06368, Supplement to Special Report 2017-01 (PAM Report): Inoperability of Post-Accident Monitoring (PAM) Instruments2017-04-27027 April 2017 Supplement to Special Report 2017-01 (PAM Report): Inoperability of Post-Accident Monitoring (PAM) Instruments ULNRC-06309, Special Report 2016-03: Inoperability of a Seismic Instrument for Greater than 30 Days2016-06-0707 June 2016 Special Report 2016-03: Inoperability of a Seismic Instrument for Greater than 30 Days ULNRC-06306, Special Report 2016-02, Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Days2016-05-18018 May 2016 Special Report 2016-02, Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Days ULNRC-06304, Special Report 2016-01: Inoperability of a Seismic Instrument for Greater than 30 Days2016-05-0909 May 2016 Special Report 2016-01: Inoperability of a Seismic Instrument for Greater than 30 Days ULNRC-06162, Special Report 2014-05 Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Day2014-12-11011 December 2014 Special Report 2014-05 Inoperability of Loose Parts Monitoring Instrument for Greater than 30 Day ULNRC-06098, 10 CFR 50.46 Annual and Thirty Day Report, ECCS Evaluation Model Revisions2014-03-25025 March 2014 10 CFR 50.46 Annual and Thirty Day Report, ECCS Evaluation Model Revisions ULNRC-06002, Special Report 2013-02: Inoperability of a Seismic Instrument for Greater than 30 Days2013-05-31031 May 2013 Special Report 2013-02: Inoperability of a Seismic Instrument for Greater than 30 Days ULNRC-05895, Special Report 2012-01 - Inoperability of Post Accident Monitoring (PAM) Instrument for Greater than 30 Days2012-08-0808 August 2012 Special Report 2012-01 - Inoperability of Post Accident Monitoring (PAM) Instrument for Greater than 30 Days ULNRC-05323, 30-Day Response to Plant - NRC Special Inspection Report 05000483/2006011, Dated July 14, 20062006-08-10010 August 2006 30-Day Response to Plant - NRC Special Inspection Report 05000483/2006011, Dated July 14, 2006 ULNRC-05187, Inoperable Channel 3 of the Loose Parts Detection System (Lpds)2005-08-11011 August 2005 Inoperable Channel 3 of the Loose Parts Detection System (Lpds) ML0516702022005-06-0909 June 2005 Special Report Meteorological Tower 10-60M Air Temperature Delta-T Inoperable ULNRC-05089, Special Report on the Inoperability of Unit Vent High Range Radiation Monitor2004-11-10010 November 2004 Special Report on the Inoperability of Unit Vent High Range Radiation Monitor ML0426104292004-09-0303 September 2004 Special Report: Meteorological Tower 10M - 60M T Indication Inoperable ML0421702912004-07-28028 July 2004 Special Report, Meteorological Tower 10M - 60M at Wind Direction Indication Inoperable ML0407105792004-03-0404 March 2004 Special Report Regarding Inoperable Channel 12 of the Loose Parts Detection System (Lpds) ULNRC-04834, Facility Operating License NPF-30 10 CFR 50.46 Thirty Day Report ECCS Evaluation Model Revisons2003-04-0808 April 2003 Facility Operating License NPF-30 10 CFR 50.46 Thirty Day Report ECCS Evaluation Model Revisons ML0208506032002-03-15015 March 2002 Special Report 2002-01 GT-RT-21B Radiation Monitor Inoperable 2019-05-02
[Table view] |
Text
Am MISSOURI eren Callaav Plant June 5.2018 U LNRC-0644 1 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:
DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT I UNION ELECTRIC CO.
RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2018-02:
NON-FUNCTIONALITY OF AN ACCIDENT MONITORING INSTRUMENT FOR GREATER THAN 30 DAYS Enclosed is a special report addressing the non-fttnctionality of an accident monitoring instrument at the Caflaway plant.
No new commitments are identified in this correspondence. and none of the material in the 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.
Sincerely, Wink Manager, Regulatory Affairs Enclosure P.O. Box 620 fulton, MO 6525 AmerenMissouri.com
ULNRC-0 6441 June 05, 201$
Page 2 of3 cc: Mr. Kriss M. Kennedy 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
$201 NRC Road Steedman, MO 65077 Mr. L. John Kios Project Manager, Call away Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop O9E3 Washington, DC 20555-0001
ULNRC-0644 I June 05. 2018 Page3 of3 Index and send hardcopy to QA File A160.0761 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 following can be made via Other Situations ULNRC Distribution:
F. M. Diya T. E. Henmann B. L. Cox S. P. Banker R. C. Wink T. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. Jay Silberg (Pillsbciry Winthrop Shaw Pittman LLP)
Missouri Public Service Commission
Enclosure to ULNRC-06441 Page lof 1 Special Report 2018-02 Requirement Callaway Plants Final Safety Analysis Report (FSAR) Section 16.3.3.4 contains requirements for accident monitoring instrumentation. Specifically, the accident monitoring instrumentation channels shown in Table 16.3-7 are required to be FUNCTIONAL in MODES 1, 2, and 3. Action A of FSAR section 16.3.3.4 states, With the number of FUNCTIONAL accident monitoring instrumentation channels less than the Total Number of Channels shown in Table 16.3-7, restore the nonfunctional channel(s) to FUNCTIONAL status within 30 days or prepare and submit a Special Report to the Commission within the following 14 days, outlining the preplanned alternate method of monitoring, the cause of the non-functionality, and the plans and schedule for restoring the channels to FUNCTIONAL status.
Background
During the performance of routine calibration testing on 04/23/18 to perform a zero and span check on GSAIOO1O, Containment Hydrogen Concentration Train B Analysis Indicator, the analyzer response was not as expected. The output of the unit was slow to respond following the application of span gas, and subsequent investigations determined that the unit continued to experience operational concerns.
Alternate Monitoring Plans Alternate train indicator GSAIOO19, Containment Hydrogen Concentration Train A Analysis Indicator, is being monitored, and it is currently providing (or capable of providing) reliable indication of containment hydrogen concentration.
Cause of the NON-FUNCTIONALITY of the B hydrogen analyzer Troubleshooting is currently ongoing per job 18001773, Investigate GSAIOO1O not Responding Properly During Zero and Span Check. At this time, however, the cause of the NON-FUNCTIONALITY of the B hydrogen analyzer has not been determined.
Plans and Schedule for Restoring the Instrument to FUNCTIONAL status Plans for restoring the Instrument to FUNCTIONAL status are to continue troubleshooting activities and then repair the instrument after the cause of failure is known. Investigation is continuing, and repair is planned under sub-tasks to job 18001773. At this time, Callaway Plant expects the Containment Hydrogen Concentration Train B Analysis Indicator to be returned to FUNCTIONAL status by July 31, 2018 contingent on determination of the cause of failure.