|
---|
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-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-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-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-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-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-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-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-06804, Submittal of Nuclear Property Insurance Reporting2023-03-29029 March 2023 Submittal of Nuclear Property Insurance Reporting 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-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-06794, Submittal of Fitness for Duty Program Data for 20222023-01-24024 January 2023 Submittal of Fitness for Duty Program Data for 2022 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 Response to Notice of Violation
MONTHYEARULNRC-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 ML22318A1892022-11-14014 November 2022 Enclosure 1 - Ameren Missouri'S Response to Green NCV 05000483/2022010-03 ULNRC-06493, Supplemental Response to Notice of Violation, Inspection Report No. 50-483/20160022019-04-11011 April 2019 Supplemental Response to Notice of Violation, Inspection Report No. 50-483/2016002 IR 05000483/20170072017-11-0101 November 2017 Reply to Notice of Violation 05000483/2017007-01 ULNRC-06394, Reply to Notice of Violation 05000483/2017007-012017-11-0101 November 2017 Reply to Notice of Violation 05000483/2017007-01 ULNRC-06378, Supplemental Response to Notice of Violation Inspection Report No. 50-483/20160022017-06-27027 June 2017 Supplemental Response to Notice of Violation Inspection Report No. 50-483/2016002 ULNRC-06365, Updated Response to Notice of Violation Inspection Report 50-483/20160022017-04-27027 April 2017 Updated Response to Notice of Violation Inspection Report 50-483/2016002 ULNRC-06326, Reply to a Notice of Violation Inspection Report 05000-483/20160022016-09-0909 September 2016 Reply to a Notice of Violation Inspection Report 05000-483/2016002 IR 05000483/20080032008-09-0404 September 2008 Reply to Notice of Violation: EA-08-190, Inspection Report No. 50-483/2008003 ULNRC-05528, Reply to Notice of Violation: EA-08-190, Inspection Report No. 50-483/20080032008-09-0404 September 2008 Reply to Notice of Violation: EA-08-190, Inspection Report No. 50-483/2008003 ML0608304122006-03-14014 March 2006 IR 05000483-05-005, Union Electric Co., Reply to Notice of Violation IR 05000483/20050052006-03-14014 March 2006 IR 05000483-05-005, Union Electric Co., Reply to Notice of Violation ML0535702612005-12-14014 December 2005 Reply to Inspection No 50-483/05-004 IR 05000483/20050042005-12-14014 December 2005 Callaway, Reply to Inspection No 50-483/05-004 ULNRC-04867, Reply to Notice of Violation Inspection Report No. 50-483/2003-0082003-07-21021 July 2003 Reply to Notice of Violation Inspection Report No. 50-483/2003-008 ULNRC-04848, Reply to Preliminary White Finding Regarding Inspection Report No. 50-483/2003-0082003-06-10010 June 2003 Reply to Preliminary White Finding Regarding Inspection Report No. 50-483/2003-008 ULNRC-04653, Reply to Notice of Violation for Inspection Report 50-483/2002-007, Enforcement Action EA-02-0462002-05-0808 May 2002 Reply to Notice of Violation for Inspection Report 50-483/2002-007, Enforcement Action EA-02-046 ML0202903752002-01-22022 January 2002 Response to Enforcement Action (EA-01-005) from Union Electric Co 2022-11-14
[Table view] |
Text
1uo3!]noss!Ajue]eLIJ\f : LLO9 :J1 uiaip : 6c pt.?o}1 ;4uno3 ci £8
£ 3UJJ)J U UWfl3Op S1?M AON 4T 0J SUOdSJ IT JO MTAJ Tfl? s13)JN 4T pTI1E? o::uoJoJoa pOpTAOJd sii AOM B o suodsoi UOTTJM kt?p-OE s!Jnossll/ibiI
-V (I UJT id) uijj APM1?II1?3 qT JOJ pTJTUpT (AON)
UOTIOTA JO 3TON pATOJ (unossiN qp) AuiEdwo3 UOTUQ 9IO 1 1 1SnflV O (cv8LILnN ITUflN UOTSS3O siivav) LIO L OUflf pp 1OO9IO/E8t
-oc jiodoj urndsuj UOTIOAIO O3TO O OSUOdS)J puwddn$ 8L9O-aaNIn (cLvLI ILJ1N JITUflN UOJSSO3O sNvuv) LIO L I!dV pop 1009 tO1/E817
-oc iodo>.j urnpodsuj uoTT11oTAIo ooo o suods>.j popdj c9E90-aaN]n (Etov8c19 I 1TN 1tT1TflM UOTSSO33 sNvav) (loo9 I 01/80000 lJodo)J UOflOdSUJ y>jj) UOTT!?IOTAJO 3TO O SUOdSO)J U1J 1I3 AU1?dWOJ JTD1:EI uoun 1?]CKI !PEI OT EiM$fl J01kt?J )3TJ\ WOJJ 9 101 tI 1oqwodo pop (cllvEcl9vIN J1TUflM UOTSSO33 SNVGV) 9101 6 ioqwoTds pop A1oo9Ioz/Eg-oc °N JOdO)J uoTdsu UOfl1?IOTAJO 3TOj 1? O JdO)J 91E90ieTNIfl (LLcvclz9 FIN JoqfflnN uo!ss33v SNVUV) U0W[0AJ0 O3TON 1009 I01/sI000c0 lJodo)J UOflOdSUJ pOJUJ 3Jj\ TId i1WdWO3 °TIJ uoun 1?]cU W1:T O 3)JMSfl JOJiJ H 1°T°M WOJJ 9101 11 PVP °I rOO9JO1/$t-O 0M Th0J1U MOIIEXEIJSMI MOI1V1OIA JO 3EHIOM 01 1SMOJSIll IV1MflAJUIIJilS O-JJN SNUW1 DNIIV}EIJO AIflDVJ OIJWELMIH
- oJ Jffl1:m NOINft I INil IMVIJ AVAWITV Exl-oc llIflNilN 13)DOU
- uwoIuo W? SOTpW 1011 H3 01 I000-cccol u uounjstj
)1SU JOLJJUO3 UOWflOcJ TflV uossmmo3 AJoT1?Inoa J1OIOflN Sfl f&fr903TWIfl 6101 11 llJdV WOD 9coI9L9Lc J ccI6I9Lc I aiuj JJuEI Jnoss!N ua1muv up!sa1a °!A 1!S
- 4
ULNRC-06493 April 11, 2019 Page 2 of 6 In Reference 2, Ameren Missouri committed to perform an Essential Service Water (ESW) system transient analysis and identify non-conforming structural components by April 30, 2017. In addition, a supplemental response identifying actions required as a result of the transient analysis was committed to be provided by June 30, 2017.
In Reference 4, Ameren Missouri reported that, as of April 201 7, the preliminary results from the ESW system transient analysis were still being finalized. It was noted that the commitment to provide a supplemental response identifying actions required as a result of the transient analysis would still be met for the originally identified due date of June 3 0, 2017.
In Reference 5, Ameren Missouri provided a supplemental response to the subject NOV, including identification of actions required as a result of the analyses that were performed for the ESW system.
The information that was provided addressed each of the three concerns/actions that were identified as requiring further resolution in Ameren Missouris September 9, 201 6 NOV response. Of those three concerns, the first two have been resolved via cooling coil replacements for the identified heat exchangers. For the third concern, involving the completion of system transient analyses to determine what additional actions (i.e., plant design changes) are needed, it was reported that progress was being made on a conceptual design for a plant modification. It was noted that an engineering change package would be developed and that the design change(s) would be fully implemented and tested no later than completion ofRefuel 23, which is now in progress at Callaway.
In 201 8, significant progress was made on finalizing the design for the modification selected to resolve the ESW system pressure transient concern. In December 201 8, however, a previously unanalyzed failure mode for either of the UHS cooling tower bypass valves (EFHVOO65 for the A train and EFHVOO66 for the B train) was recognized. It was then determined that the additional failure mode would affect the previously completed transient analysis.
The previously unanalyzed failure mode identified for the normally open EFHVOO65/66 valves is that with either valve in an initially closed position, which is the case only during certain plant evolutions such as when using the ultimate heat sink (UHS) cooling tower to cool the UHS retention pond for temperature control, a failure of the valve(s) to open could occur following activation of the load sequencer in the event of a loss-of-coolant accident (LOCA) and/or a loss of offsite power (LOOP).
The failure ofthe valve to open may be postulated to occur during the time when, following the onset of the accident/event, load shedding has already occurred and the sequencing/re-energizing of loads is ongoing, specifically when the sequencer re-energizes the motor control center that supplies the EFHVOO65/66 valve operator motor.
ULNRC-06493 April 11, 2019 Page 3 of 6 Preliminary analysis of such a failure indicates that a pressure transient event is more severe for the affected train when the EFHVOO65/66 valve is closed (i.e., failed closed) at the time of E$W pump restart in the associated train. Since the previously completed transient analysis is no longer bounding (i.e., without the additional failure mode taken into account), the original modification planned for installation in Refuel 23 will not alone be sufficient to completely resolve the nonconforming condition (in regard to Code/design margins for structural components needed to withstand the postulated ESW pressure transient). Based on this new information, an additional plant modification(s) will likely be needed to fully resolve the issue.
It should be noted that although the need for an additional plant modification(s) is likely, sufficient analysis has been performed to assess the acceptability of the plant configuration that existed going into the current plant outage as well as the configuration that will exist following the outage (i.e.,
following implementation of the originally planned modification during the outage). In regard to the former, a Past Operability evaluation (POPE) was performed for the time period over the last three years, which includes the time periods before and after implementation of the corrective actions taken in response to initial identification of the system pressure transient issue in early 20 1 6 (as reported per Licensee Event Report 1 6-001 (and 1 6-001 -01) and as addressed by the NOV). From the analysis performed in support of the POPE, no new or previously unrecognized inoperability was identified for the period of time before the 201 6 corrective actions were taken. For the period subsequent to that, although some non-conforming conditions (i.e., reduced design margins) were identified, past Operability was confirmed to have existed for the ESW system and its loads, as well as for the UH$.
In regard to the plant configuration that will exist subsequent to the current plant outage, the originally intended modification is still being installed during the outage (as noted above), and sufficient post-modification testing will be performed during the outage to demonstrate that upon ESW actuation following a LOCA and/or LOOP, all plant components remain capable of performing their required functions, even with the EfHVOO65/66 valve(s) in the closed position upon ESW pump start.
At present, there is insufficient time to precisely analyze, design and implement a revised/additional modification to fully restore design margins prior to the completion ofRefuel 23. However, in light of the improved pressure transient mitigation capability afforded by the modification being installed during the outage, a basis exists to enable completion of an operability determination with the originally designed modification installed. The ESW system will thus be considered operable but degraded or non-conforming when the plant is returned to operation at the end of Refuel 23 The .
justification for operability will be documented in a Prompt Operability Determination in accordance with NRC-accepted guidance (IMC 0326).
ULNRC-06493 April 11, 2019 Page 4 of 6 The additional modification(s) for restoring the E$W system and/or affected components to their intended design (i.e., with all design margins fully restored) will be implemented and tested no later than completion ofRefuel 24 (Fall 2020).
None of the information in this supplemental response is proprietary. Further, this letter does not contain new commitments.
If there are any questions concerning this letter, please contact Mr. Eric Olson, Director, Engineering Design & Projects at (573) 676-8280.
Sincerel ,
7 T.E. Herrmann Site Vice President
ULNRC-06493 April 11, 2019 Page 5 of 6 cc: Mr. Scott A. Morris 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 Klos Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 09E3 Washington, DC 20555-0001
ULNRC-06493 April 11, 2019 Page 6 of 6 Index and send hardcopy to QA File A160.0761 Hardcopy:
Certrec Corporation 6100 Western Place, Suite 1050 FortWorth,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 Responses and Reports ULNRC Distribution:
F. M. Diya T. E. Herrmann B. L. Cox S.P. Banker S. L. Abel E. C. Olson R. C. Wink T. B. Elwood NSRB Secretary RRA Department File STARS Regulatory Affairs Mr. Jay Silberg (Pillsbury Winthrop Shaw Pittman LLP)
Missouri Public Service Commission