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Category:Letter
MONTHYEARML24270A0332024-09-20020 September 2024 Independent Spent Fuel Storage Installation Annual Radioactive Effluent Release Report IR 05000237/20244022024-09-19019 September 2024 – Security Baseline Inspection Report 05000237/2024402 and 05000249/2024402 - (Public) ML24240A1692024-09-18018 September 2024 Cy 2023 Summary of Decommissioning Trust Fund Status ML24260A2152024-09-16016 September 2024 Confirmation of Initial License Examination ML24255A8642024-09-0606 September 2024 Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification ML24249A1362024-09-0404 September 2024 EN 57304 - Westinghouse Electric Company, LLC, Final Report - No Embedded Files. Notification of the Potential Existence of Defects Pursuant to 10 CFR Part 21 IR 05000237/20230052024-08-28028 August 2024 Updated Inspection Plan and Assessment Follow-Up Letter for Dresden Nuclear Power Station, Units 2 and 3 (Report 05000237/2023005; 05000249/2024005) ML24239A3972024-08-23023 August 2024 Rssc Wire & Cable LLC Dba Marmon - Part 21 Final Notification - 57243-EN 57243 IR 05000237/20240022024-08-14014 August 2024 Integrated Inspection Report 05000237/2024002 and 05000249/2024002 ML24215A2912024-08-14014 August 2024 Request for Withholding Information from Public Disclosure Alternative Schedule to Complete Decommissioning Beyond 60-Years of Permanent Cessation of Operations IR 05000237/20240102024-08-0909 August 2024 NRC Age-Related Degradation Inspection Report 05000237/2024010 and 05000249/2024010 IR 05000237/20230112024-08-0707 August 2024 Reissue - Dresden Nuclear Power Station, Units 2 and 3 Comprehensive Engineering Team Inspection Report 05000237/2023011 and 05000249/2023011 IR 05000237/20200012024-08-0606 August 2024 Reissue - Dresden Nuclear Power Station, Units 2 and 3 - Integrated Inspection Report 05000237/2020001 and 05000249/2020001 ML24184A1712024-08-0202 August 2024 SLRA Schedule Letter RS-24-073, Alternative Schedule to Complete Decommissioning Beyond 60 Years of Permanent Cessation of Operations – Additional Information Supporting Request to Withhold Security-Related Information2024-07-31031 July 2024 Alternative Schedule to Complete Decommissioning Beyond 60 Years of Permanent Cessation of Operations – Additional Information Supporting Request to Withhold Security-Related Information ML24136A1322024-07-30030 July 2024 Transmittal Letter for Renewed License ML24208A0962024-07-25025 July 2024 57243-EN 57243 - Rssc Wire & Cable LLC, Dba Marmon - Part 21 Notification ML24193A0882024-07-24024 July 2024 Request for Withholding Information from Public Disclosure for Dresden Nuclear Power Station, Unit 1 Alternative Schedule to Complete Decommissioning Beyond 60-Years of Permanent Cessation of Operations (Docket 50-10) ML24204A1862024-07-24024 July 2024 – Regulatory Audit in Support of License Amendment Requests to Adopt TSTF 505, Revision 2; TSTF-591, Revision 0; and 10 CFR 50.69 IR 05000237/20243012024-06-27027 June 2024 NRC Initial License Examination Report 05000237/2024301; 05000249/2024301 ML24138A0572024-06-26026 June 2024 – Issuance of Amendment Nos. 285 and 278 Application to Adopt TSTF-564, Safety Limit MCPR ML24138A1812024-06-18018 June 2024 Aging Management Audit Plan Regarding the Subsequent License Renewal Application Review RS-24-061, Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations2024-06-14014 June 2024 Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations RS-24-063, Response to Request for Additional Information for 10 CFR 50.55a Request No. I5R-222024-06-14014 June 2024 Response to Request for Additional Information for 10 CFR 50.55a Request No. I5R-22 ML24128A2742024-06-14014 June 2024 Notice of Acceptance and Opportunity for Hearing - Letter ML24156A2332024-06-11011 June 2024 Letter Supplemental Information for Alternative Schedule to Complete Decommissioning Beyond 60-Years of Permanent Cessation of Operations ML24151A6482024-06-0303 June 2024 Changes in Reactor Decommissioning Branch Project Management Assignments for Some Decommissioning Facilities SVPLTR 24-0020, Registration of Use of Casks to Store Spent Fuel2024-05-30030 May 2024 Registration of Use of Casks to Store Spent Fuel ML24183A2752024-05-30030 May 2024 Registration of Use of Casks to Store Spent Fuel RS-24-056, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors2024-05-28028 May 2024 Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors ML24145A0432024-05-23023 May 2024 Registration of Use of Casks to Store Spent Fuel 10 CFR 72.212 SVPLTR 24-0019, Registration of Use of Casks to Store Spent Fuel2024-05-23023 May 2024 Registration of Use of Casks to Store Spent Fuel ML24079A0762024-05-23023 May 2024 Issuance of Amendments to Adopt TSTF 264 ML24158A0012024-05-22022 May 2024 License Amendment Request to Adopt TSTF-564 (EPID L-2023-LLA-0120) Illinois State Concurrence ML24142A3352024-05-21021 May 2024 Quad Cities—Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes RS-24-055, 2023 Corporate Regulatory Commitment Change Summary Report2024-05-17017 May 2024 2023 Corporate Regulatory Commitment Change Summary Report ML24135A0722024-05-10010 May 2024 Submittal of 2023 Annual Radiological Environmental Operating Report ML24134A1132024-05-0808 May 2024 Retraction: LER 2303-001-00 for Dresden Nuclear Power Station, Unit 2, HPCI Inoperable Due to Air Void Accumulation ML24129A1352024-05-0808 May 2024 License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b, and TSTF-59 ML24128A1212024-05-0707 May 2024 Response to Braidwood and Dresden FOF Dates Change Request (2025) ML24092A3412024-05-0101 May 2024 SLRA - Receipt and Availability - Letter IR 05000237/20240012024-05-0101 May 2024 Integrated Inspection Report 05000237/2024001 & 05000249/2024001 RS-24-041, Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests2024-04-30030 April 2024 Alternative Request to Utilize Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests ML24127A0982024-04-30030 April 2024 Radioactive Effluent Release Report ML24120A2032024-04-29029 April 2024 Operator Licensing Exam Approval - Dresden Nuclear Power Station, May 2024 IR 05000237/20244012024-04-18018 April 2024 – Security Baseline Inspection Report 05000237/2024401 and 05000249/2024401 ML24108A0082024-04-17017 April 2024 Application for Renewed Operating License RS-24-021, Response to Request for Additional Information for 10 CFR 50.55a Request No. I5R-222024-04-0202 April 2024 Response to Request for Additional Information for 10 CFR 50.55a Request No. I5R-22 RS-24-002, Constellation Energy Generation, LLC - Annual Property Insurance Status Report2024-04-0101 April 2024 Constellation Energy Generation, LLC - Annual Property Insurance Status Report RS-24-023, Report on Status of Decommissioning Funding.2024-03-22022 March 2024 Report on Status of Decommissioning Funding. 2024-09-06
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' ,,_ "' ' *t!!.' . .J.* ,*" Li UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 July 20, 19 76 Docket No. 50-249 Karl R. Goller, Assistant Director for Operating Reactors, DOR f;/!...y THRU: Dennis L. Ziemann, Chief, Operating Reactors Branch #2, DOR . DRESDEN UNIT 3 -DIESEL GENERATOR COOLING WATER FLOOD PROTECTION Introduction By letter of July 16, 1976, Commonwealth Edison Company (CE) informed us that the Dresden Unit 3 submersible diesel generator cooling water pwnp had failed and could not be repaired or replaced within the seven day period allowed for continued operation with one diesel generator out of service (Specification 3.9.B.2.).
The seven day period ends Tuesday, July 20, at 5:30 pm. The replacement pump, ordered about a year ago., as a spare, is not expected to be available until about August 30. CE stated that the cooling pwnp would be replaced temporarily, with the nonsubmersible pwnp which had been originally used. The original pump had been replaced by the submersible pump as part of a flood protection modification to assure co"oling of the Unit 3 diesel would be available if flooding of the cribhouse occurred.
CE has formed a review in accordance with the requirements of 10 CFR 50.59 and has concluded that the temporary replacement does not involve a change in technical or an unreviewed safety question.
Discussion Prior to* replacement of the original Dresden 3 .and Dresden 2/3 diesel generator cooling water pumps with submersible pumps, the possibility existe.d that a flood in the cribhouse could fail these pumps and* therefore, fail the diesel generators.
As an interim fix, reported to the NRC by CE letter of August 23, 1973, CE committed to shutting down the reactor in the event of flooding in the cribhouse and connecting a manual hose type intertie from the fire water system to the cooling
- water supply of the 2/3 diesel generator.
The temporary arrangement now planned by CE would be better than the interim fix previously reviewed
.-.*--***" .. :, . . -_. *. , .. "_. ..
..,,,;; ...
- j -. .. .:., .-*;. . . . ... _ ' *, 'Karl GoUer: .. _(' . . ..;_ -2 *.-. . July 20; t976 ..
- l * ** *.-*-i' .:.. _.' . '. _ ... *.*. . ' in. that** an opetab1.e
- subnie:rsible pump'*will":be avf.l.ilable to supply cooling . water to the 2/3 diesel.
- in. :addition, the Unit 2 *diesel which is cooied 'by a submersible pump" could be crossti,ed
- 'to the Unit 3 emergency .busses. _CE has also ccinllitltted . to*
Uiii t. 3 ff. crib4ou5e flooding occurred the new*
A level -alarm wo:uld-warn
.. of flooding before wate:f level' reached *tne 'pump° eievation. , * -* ' *
- I* * ' * * * ' * -* -' _:. "ilased,*, on ab.ave conslder_atioj'is, I *hav$
that th6 meas.ures, -planne.d by CE are acceptable as an* interim actfo.n ,prior to installation
- of a repaired or.replacement'sul>mersibie pWnp; that the actions
-*by CE are not in *conflic.t with the. tecllnical specifications and .that
'measures wfll_ be sUbstantiaHy better than the measures previou5ly reviewed_
I *conclude that* operation wiU1i/,*.
the on :a 'teiirp,*orary-basis does not .involve .. an _unrevfewed safety *question
T. Carter DISTRIBUTION*
NRC PDR . Local*PDR R_DSilver RMDiggs , . . :: .1_.. -::. _:** c,,. ' !_ ... __ . *. :_.<OrY*bi ntJ St
\0_ Richard D. Silver
- Operating Reactors Branch-.#2 Divisio:n of Operating Reactors ; *.' .*. ;_ .. : . .. ' . .-. * .. . '.. l *. ,*..,, . ' #2 __ .. -.DM13_ #2.. ..: _ -.................... . RJ:?S.il ver: ah . DLZi emann
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.......................... . -. ' . -Form (Rev. 9-53) AE<;:M .02'0. ' -* U.* S:
PRINTING 0PP1CEI .