Letter Sequence RAI |
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EPID:L-2018-RNW-0013, Annual Radioactive Effluent Release Report 60: January 1, 2017 Through December 31, 2017 (Approved, Closed) |
Results
Other: ML18193A697, ML18232A438, ML18232A439, ML18289A379, ML18299A124, ML18304A200, ML18346A675, ML18354B066, ML19010A383, ML19023A227, ML19308A006, ML20054A175
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MONTHYEARRS-17-149, Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from The.2017-12-15015 December 2017 Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from The. Project stage: Supplement RS-18-033, Request for Extension of Due Date for Seismic Probabilistic Risk Assessment Submittal2018-03-15015 March 2018 Request for Extension of Due Date for Seismic Probabilistic Risk Assessment Submittal Project stage: Request RS-18-043, Supplement to Request for Extension of Due Date for Seismic Probabilistic Risk Assessment Submittal2018-03-28028 March 2018 Supplement to Request for Extension of Due Date for Seismic Probabilistic Risk Assessment Submittal Project stage: Request ML18116A3242018-04-26026 April 2018 Annual Radioactive Effluent Release Report 60: January 1, 2017 Through December 31, 2017 Project stage: Request ML18193A6972018-07-10010 July 2018 Cover Letter Submitting Subsequent License Renewal Application Project stage: Other RS-18-098, Seismic Probabilistic Risk Assessment Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from ...2018-08-28028 August 2018 Seismic Probabilistic Risk Assessment Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from ... Project stage: Response to RAI ML18232A4392018-09-0404 September 2018 Federal Register Notice - Notice of Intent to Prepare an Environmental Impact Statement and Conduct Scoping Process for Peach Bottom Atomic Power Station, Units 2 and 3 Project stage: Other ML18232A4372018-09-0404 September 2018, 10 September 2018 Notice of Intent to Prepare an Environmental Impact Statement and Conduct Scoping Process Project stage: Request ML18232A4382018-09-10010 September 2018 Letter - Notice of Intent to Prepare an Environmental Impact Statement and Conduct Scoping Process for Peach Bottom Atomic Power Station, Units 2 and 3 Project stage: Other ML18288A4382018-09-25025 September 2018 Transcript from Peach Bottom SLR Envr Scoping Meeting 2018-09-25 Project stage: Request ML18275A3712018-09-25025 September 2018 Subsequent License Renewal Environmental Scoping Meeting 9-25-18 Project stage: Meeting ML18299A1242018-10-0101 October 2018 Pennsylvania State Historic Preservation Office Scoping Comments Concerning Peach Bottom Atomic Power Station, Units 2 & 3 Subsequent License Renewal Application Project stage: Other ML18282A1692018-10-0909 October 2018 Comment (3) of Richard Mccorkle on Exelon Generation Company, LLC; Peach Bottom Atomic Power Station Units 2 and 3 Project stage: Request ML18289A5092018-10-18018 October 2018 09/25/2018 Summary of Meeting for Environmental Review of Peach Bottom Atomic Power Station, Units 2 and 3, Subsequent License Renewal Application Project stage: Meeting ML18289A3792018-10-25025 October 2018 License Renewal Environmental Site Audit Plan Regarding the Peach Bottom Atomic Power Station, Units 2 and 3, Subsequent License Renewal Application Project stage: Other ML18288A1942018-10-25025 October 2018 Summary of the Site Visit Related to the Review of the Subsequent License Renewal Application for the Peach Bottom Atomic Power Station Units 2 and 3 Project stage: Approval ML18304A2002018-11-0606 November 2018 License Renewal Severe Accident Mitigation Alternatives Audit Plan Regarding the Peach Bottom Atomic Power Station, Units 2 and 3, Subsequent License Renewal Application Project stage: Other ML18323A7492018-11-19019 November 2018 Beyond Nuclear Hearing Request and Petition to Intervene Project stage: Request ML18330A1572018-11-23023 November 2018 Subsequent License Renewal Environmental Requests for Additional Information Project stage: RAI ML19010A3832018-12-0707 December 2018 Additional Documents Needed for Peach Bottom SLR Environmental Review Project stage: Other ML18348B0292018-12-13013 December 2018 Subsequent License Renewal Severe Accident Mitigation Alternatives Requests for Additional Information Project stage: RAI ML18354B0612018-12-20020 December 2018 Response to NRC Request for Additional Information, Dated November 23, 2018, Regarding the Peach Bottom Atomic Power Station, Units 2 and 3, Subsequent License Renewal Application, Environmental Requests for Additional Information Project stage: Response to RAI ML18354B0662018-12-20020 December 2018 Summary of Monitoring Well Installation Details Project stage: Other ML19028A2802019-01-28028 January 2019 Response to NRC Request for Additional Information, Dated December 13, 2018, Regarding Peach Bottom Atomic Power Station, Units 2 and 3, Subsequent License Renewal Severe Accident Mitigation Alternatives Requests for Additional Information Project stage: Response to RAI ML18346A6752019-01-31031 January 2019 Summary of the Subsequent License Renewal Environmental Audit Project stage: Other ML19023A2272019-02-0505 February 2019 Summary of the Subsequent License Renewal Severe Accident Mitigation Alternatives Audit Project stage: Other ML19037A3482019-07-25025 July 2019 Issuance of Environmental Scoping Summary Report Associated with the Staff'S Review of the Peach Bottom Atomic Power Station Units 2 and 3 Subsequent License Renewal Application Project stage: Approval ML19210C5712019-07-31031 July 2019 Schedule Revision for the Review of the Peach Bottom Atomic Power Station Units 2 & 3 Subsequent License Renewal Application (EPID Nos. L-2018-RNW-0012/L-2018-RNW-0013) Project stage: Approval ML19199A1152019-08-0101 August 2019 Federal Register Notice - Peach Bottom Atomic Power Station Notice of Availability of the Draft Plant-Specific Draft Supplement 10 Second Renewal to the Generic Environmental Impact Statement for SLR Project stage: Draft Other ML19199A1142019-08-0101 August 2019 Notice of Availability of Draft Supplement 10, Second Renewal to the Generic Environmental Impact Statement for License Renewal of Nuclear Plants Regarding Subsequent License Renewal for Peach Bottom Atomic Power Station Units 2 and 3 Project stage: Draft Other ML19260F9652019-08-0101 August 2019, 12 September 2019, 23 September 2019, 2 October 2019 Nuclear Regulatory Commission'S Public Meeting on the Draft Supplemental Environmental Impact Statment for Subsequent License Renewal of Peach Bottom Atomic Power Station, Units 2 and 3 Project stage: Request ML19256E3522019-09-12012 September 2019 Slides - Peach Bottom SLRA Dseis Public Meeting - Sep 12 2019 Project stage: Request ML19308A0062019-09-16016 September 2019 Jennifer Shang Comments on Pb Dseis Project stage: Other ML19273B9692019-10-0202 October 2019 September 12, 2019 - Public Meeting to Discuss Draft Supplement 10, Second Renewal, to the Generic EIS for License Renewal of Nuclear Plants Regarding Peach Bottom Atomic Power Station Units 2 and 3 SLRA (EPID: L-201-RNW-0013) ML19303D1662019-10-31031 October 2019 Requests for Additional Information for the Environmental Review of the Peach Bottom Subsequent License Renewal Application - Set 2 (EPID No. L-2018-RNW-0013)- RAIs Project stage: RAI ML20054A1752020-01-28028 January 2020 Notification of the Availability of the Final Supplement 10, Second Renewal to the GEIS for Peach Bottom Atomic Power Station, Units 2 and 3 Project stage: Other 2018-07-10
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Category:E-Mail
MONTHYEARML24002A7132023-12-29029 December 2023 Supplement - Peach Bottom Security Rule Exemption Request ISFSI Docket No. Reference (EPID L-2023-LLE-0032) (Updated) (Email) ML23352A3242023-12-18018 December 2023 Acceptance of Requested Licensing Action Request for Alternative Schedule to Complete Decommissioning Beyond 60 Years of Permanent Cessation of Operations (EPID L- 2023-LLN-0004) ML23331A9112023-11-22022 November 2023 Supplement - Peach Bottom Security Rule Exemption Request ISFSI Docket No. Reference ML23304A0182023-10-30030 October 2023 NRR E-mail Capture - Final RCI - Constellation Energy Generation, LLC - Peach Bottom 2 & 3 - Exemption from Security Rule (L-2023-LLE-0032) ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML23237B3972023-08-24024 August 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Alternative Request to Use Updated BWRVIP Guidelines ML23163A2292023-06-12012 June 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-580, Revision 1 ML22354A2622022-12-20020 December 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Request to Use Certain Provisions of the 2019 Edition of the ASME BPV Code, Section XI ML22325A0052022-11-18018 November 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-273-A, Revision 2 ML22200A0782022-07-19019 July 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request to Use Honeywell Mururoa V4F1 R Supplied Air Suits ML22118A3312022-04-28028 April 2022 NRR E-mail Capture - Peach Bottom - Formal RAI for Proposed Alternative I5R-14, Revision 1 ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22024A1852022-01-24024 January 2022 Acceptance for Review of Relief Request Associated with Reactor Pressure Vessel N-16A Nozzle Repair ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21301A0672021-10-28028 October 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-541 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21252A0482021-09-0707 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21215A3502021-08-0303 August 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-554 ML21154A0142021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0132021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0112021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21134A0152021-05-14014 May 2021 Acceptance Ventilation Filter Testing LAR ML21117A0442021-04-26026 April 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21084A2532021-03-24024 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Transfer Application ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21091A1782021-02-0202 February 2021 Ti 2515/194 Inspection Documentation Request ML21033A8552021-02-0202 February 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request to Expand the Use ASME Codes Cases N-878 and N-880 ML21012A1302021-01-12012 January 2021 Request for Additional Information - TSTF-505 ML20357A0972020-12-21021 December 2020 Request for Additional Information - TSTF-505 ML20350B5582020-12-14014 December 2020 NRR E-mail Capture - Exelon Generation Company, LLC -Alternative Request for Documentation of Replacement of Pressure Retaining Bolting ML20343A3492020-12-0707 December 2020 Acceptance of Requested Licensing Action: Peach Bottom Relief Request for N-16 Nozzle ML20324A6472020-11-19019 November 2020 Acceptance of Requested Licensing Action: Peach Bottom One-time Exemption App. B Sect. VI.C.3.(I)(1) Force on Force (COVID-19) ML20314A0282020-11-0606 November 2020 Verbal Relief for Penetration Nozzle ML20283A7722020-10-0909 October 2020 Submittal of Pennsylvania Letter Requesting Exemption from Biennial Exercise Requirements for Pennsylvania Nuclear Power Plants in Calendar Year 2020 ML20276A0762020-10-0202 October 2020 Acceptance of Requested Licensing Action, One-Time Acceptance for Review - Peach Bottom of Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Exercise Requirements Due to COVID-19 Pandemic ML20266G3032020-09-22022 September 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Request to Use Paragraph IWA-5120 of the 2017 Edition of the ASME B&PV Code, Section XI ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML20217L3462020-08-0404 August 2020 Audit Plan Regarding License Amendment Request to Implement Riskinformed Extended Completion Times (L-2020-LLA-0120) ML20191A0182020-07-0101 July 2020 NRR E-mail Capture - Exelon Fleet RR for SPI for Appendix J Valves ML20178A1392020-06-26026 June 2020 Acceptance Review for Peach Bottom - License Amendment Request for TSTF-505 ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20149K4312020-05-22022 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-566 ML20135H1972020-05-14014 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Extend Safety Relief Valve Test Interval ML20122A2302020-05-0101 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of Fleet License Amendment Request to Adopt TSTF-566 ML20077F6112020-03-16016 March 2020 E-mail: the U.S. Nuclear Regulatory Commission'S Record of Decision Regarding Exelon'S Subsequent License Renewal Application for Peach Bottom Atomic Power Station Units 2 and 3 ML20070R2282020-03-10010 March 2020 Request for Additional Information - RR ML20063G1362020-02-27027 February 2020 NRR E-mail Capture - Exelon Generation Company, LLC -Acceptance of Proposed Alternative to Extend Safety Relief Valve Test Frequency (EPIDs L-2020-LLR-0014 Through L-2020-LLR-0018) ML20057E5562020-02-26026 February 2020 Availability of the Final Supplemental Environmental Impact Statement for Subsequent License Renewal of Peach Bottom Atomic Power Station, Units 2 and 3 2023-09-21
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARIR 05000277/20244012023-10-0505 October 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000277/2024401 and 05000278/2024401 ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML22118A3312022-04-28028 April 2022 NRR E-mail Capture - Peach Bottom - Formal RAI for Proposed Alternative I5R-14, Revision 1 ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22021A5692022-01-21021 January 2022 Information Request for the Cyber Security Baseline Inspection, Notification to Perform Inspection 05000277/2022403 and 05000278/2022403 ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21035A2222021-02-0404 February 2021 Notification of Conduct of a Fire Protection Team Inspection ML21091A1782021-02-0202 February 2021 Ti 2515/194 Inspection Documentation Request ML21012A1302021-01-12012 January 2021 Request for Additional Information - TSTF-505 ML20357A0972020-12-21021 December 2020 Request for Additional Information - TSTF-505 ML20296A3342020-10-21021 October 2020 ISI Remote Inspection - Supplemental Request for Information ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML20153A7042020-06-0101 June 2020 NRR E-mail Capture - Preliminary RAI for Fleet Request to Use Alternative OMN-26 ML20135H1972020-05-14014 May 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Extend Safety Relief Valve Test Interval ML20070R2282020-03-10010 March 2020 Request for Additional Information - RR ML19303D1662019-10-31031 October 2019 Requests for Additional Information for the Environmental Review of the Peach Bottom Subsequent License Renewal Application - Set 2 (EPID No. L-2018-RNW-0013)- RAIs ML19232A1752019-08-20020 August 2019 Request for Additional Information - TSTF-500 Implementation LAR ML19140A2832019-05-15015 May 2019 Email - Peach Bottom Atomic Power Station, Units 2 and 3 Second Round RAI Request - Set 1 ML19140A2822019-05-15015 May 2019 027 Pb FU RAI Subsequent to Clarification Call - Cu Greater than 15 Zn Holston (Jg) ML19253D2932019-05-0707 May 2019 002 Attachment 4D Confirmation Water Chemistry Chereskin Revised (002) ML19249C7252019-05-0303 May 2019 SLRA Requests for Additional Information - Set 2 May 3, 2019 ML19108A4282019-04-10010 April 2019 RAIs SLRA Set 1_ERO(Rev 1) ML19079A0232019-03-19019 March 2019 Licensed Operator Positive Fitness-For-Duty Test ML19058A2902019-02-27027 February 2019 Request for Additional Information - High Pressure Service Water One Time TS Change ML19037A4832019-02-0606 February 2019 NRR E-mail Capture - Clarification Questions Associated with Staff Assessment of Peach Bottom Seismic Probabilistic Risk Assessment Report Dated August 28, 2018 ML19028A0062019-01-25025 January 2019 Secondary Containment LAR Requests for Additional Information ML19017A0472019-01-16016 January 2019 Request for Additional Information - High Pressure Service Water One Time TS Change ML18348B0292018-12-13013 December 2018 Subsequent License Renewal Severe Accident Mitigation Alternatives Requests for Additional Information ML19010A3832018-12-0707 December 2018 Additional Documents Needed for Peach Bottom SLR Environmental Review ML18324A6742018-11-15015 November 2018 Request for Additional Information (FINAL)- LAR to Allow 2SRV/SVs OOS at High Pressure ML18312A4072018-11-0808 November 2018 Request for Additional Information (Public) - LAR to Allow 2SRV/SVs OOS at High Pressure ML18276A0202018-10-0202 October 2018 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Amendment Request to Revise Emergency Plan for Limerick and Peach Bottom ML18240A1742018-08-28028 August 2018 Request for Additional Information (Final) - Adopt TSTF-500 Battery TS Changes LAR ML18239A1322018-08-27027 August 2018 Request for Additional Information Final - Relief Request I5R-04 ML18228A6762018-08-14014 August 2018 Request for Additional Information - Adopt TSTF-500 Battery TS Changes LAR ML18226A2012018-08-14014 August 2018 Request for Additional Information - Relief Request I5R-05 ML18214A2812018-08-0202 August 2018 Request for Additional Information Draft - Relief Request I5R-02 ML18200A2742018-07-17017 July 2018 Request for Additional Information 2nd Round (Final) - Adopt 50.69 License Amendment ML18192A1192018-07-10010 July 2018 Request for Additional Information 2nd Round (Final) - Adopt 50.69 License Amendment ML18178A4772018-06-27027 June 2018 Request for Additional Information 2nd Round - Adopt 50.69 License Amendment ML18096B5062018-04-0606 April 2018 Request for Additional Information Exelon Generation Company, LLC Requested Amendment to Adopt 10 CFR 50.69 for Risk-informed Categorization and Treatment of Structures, Systems and Components ML18094B0832018-04-0505 April 2018 Enclosurequest for Additional Information (Letter to P. Duke RAI Regarding Entergy Operations, Inc.'S Decommissioning Funding Plan Update for Salem and Hope Creek, and Peach Bottom ISFSIs Docket Nos. 72-48 and 72-29) ML18067A1482018-03-0808 March 2018 Enclosurequest for Additional Information (Letter to P. R. Simpson Request for Additional Information Regarding Exelon Generating Company, Llc'S Decommissioning Funding Plan Update for Independent Spent Fuel Storage Installation) ML17317B5502017-11-0909 November 2017 Licensed Operator Positive Fitness-For-Duty Test ML17240A0062017-08-24024 August 2017 Request for Additional Information Regarding License Amendment Request for Measurement Uncertainty Recapture Power Uprate ML17222A0962017-08-10010 August 2017 Request for Additional Information - Amendment Request Regarding Safety Relief Valve and Safety Valce Operability for Cycle 22 2023-09-21
[Table view] |
Text
From: Hayes, Barbara To: michaelp.gallagher@exeloncorp.com Cc: Drucker, David; Oesterle, Eric; Gibson, Lauren; Wilson, George; Beasley, Benjamin; Donoghue, Joseph; Hoffman, Robert; Martinez, Nancy; Ford, William; Folk, Kevin; Moser, Michelle; Rautzen, William; Grange, Briana; Rikhoff, Jeffrey; Young, Mitzi; Gamin, Kayla; Ranek, Nancy L.:(GenCo-Nuc)
Subject:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3, SUBSEQUENT LICENSE RENEWAL SEVERE ACCIDENT MITIGATION ALTERNATIVES REQUESTS FOR ADDITIONAL INFORMATION (EPID L-2018-RNW-0013)
Date: Thursday, December 13, 2018 3:55:00 PM Attachments:
Dear Mr. Gallagher:
The U.S. Nuclear Regulatory Commission (NRC) is reviewing the Exelon Generation Company, LLC (Exelon) application for subsequent renewal of the operating licenses for Peach Bottom Atomic Power Station, Units 2 and 3 (Peach Bottom). As part of the environmental review, an audit related to severe accident mitigation alternatives (SAMA) was conducted via teleconference, by the NRC staff on November 13, 19 and 26, 2018. As a result of the audit and the NRC staffs review of the Peach Bottom environmental report, staff has identified areas where additional information is needed to complete the review. The enclosure lists the requests for information (RAIs) and the RAIs are also provided below.
As requested by Nancy Ranek of your staff, your responses are expected no later than 45 days from the date of this email. If you have any questions, please contact me at 301-415-7442 or by e-mail at barbara.hayes@nrc.gov.
Sincerely, Barbara Hayes, Project Manager License Renewal Projects Branch Division of Materials and License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278
Enclosure:
Request for Additional Information Regarding Severe Accident Mitigation Alternative (SAMA) cc w/encl: Distribution via Listserv OFFICE PM:
PM: DMLR/MRPB BC: DMLR/MENB BC: DMLR/MRPB PM: DMLR/MRPB DMLR/MRPB NAME DDrucker BBeasley (JRikhoff Bhayes EOesterle BHayes for)
DATE 12/10/18 12/10/2018 12/11 /2018 12/ 13 /2018 12/13/2018 OFFICIAL RECORD COPY Enclosure PEACH BOTTOM NUCLEAR GENERATING UNITS 3 AND 4 (PEACH BOTTOM)
SUBSEQUENT LICENSE RENEWAL APPLICATION REVIEW REGARDING SEVERE ACCIDENT MITIGATION ALTERNATIVES (SAMA)
Request for Additional Information Basis License renewal requirements are specified in 10 CFR Part 54, Requirements for Renewal of Operating Licenses for Nuclear Power Plants. Licensees are required by 10 CFR 51.53(c), Postconstruction environmental reports, Operating license renewal stage, to submit an environmental report (ER) as part of the license renewal application (LRA). Review guidance for the staff is provided in NUREG-1555, Standard Review Plans for Environmental Reviews for Nuclear Power Plants: Supplement 1 - Operating License Renewal.
Peach Bottom provided a severe accident mitigation alternatives (SAMA) analysis in the environmental report (ER) for the 2001 initial License Renewal application. The applicants ER for the 2018 subsequent license renewal application (SLRA) must contain any new and significant information of which the applicant is aware (10 CFR 51.53(c)(iv)) and the NRC Staff must consider whether such information affects prior generic environmental determinations, reflected in the Category 1 issues in Table B-1.
Section 51.41, Requirement to submit environmental information states:
The Commission may require an applicant for a permit, license, or other form of permission, or amendment to or renewal of a permit, license or other form of permission, or a petitioner for rulemaking to submit such information to the Commission as may be useful in aiding the Commission in complying with section 102(2) of NEPA. The Commission will independently evaluate and be responsible for the reliability of any information which it uses.
Section 51.45, Environmental report states: The environmental report should contain sufficient data to aid the Commission in its development of an independent analysis.
In the ER for the 2018 SLRA, Exelon indicated they followed the guidance in Nuclear Energy Institute (NEI) 1704, Model SLR New and Significant Assessment Approach for Severe Accident Mitigation Alternatives (SAMA),
Revision 0, for providing SAMA new and significant information. Guidance in NEI 17-04 specifies, Further documentation of the new and significant information review is listed in Section 3.5.2. Furthermore, guidance in NEI 17-04 indicates, Such documentation should be available to the NRC [U.S. Nuclear Regulatory Commission]
either in the SLR [Subsequent License Renewal] ER (at the SLR applicant's discretion), or in supplemental information for review via Edocument reading room, audit, and RAIs [requests for additional information].
Therefore, please provide responses to the following questions.
- 1. In order to confirm Peach Bottoms consistency with the postulated accident conclusions in the 2013 Generic Environmental Impact Statement (GEIS), NRC staff need selected information from the Peach Bottom SAMA New and Significant basis document to be docketed. Specific information requested includes the following.
- a. Provide a summary of probabilistic risk assessment (PRA) revisions and the description of changes to the risk models since the 40-to-60-year initial LRA (Include a description of the changes made at the plant that have reduced or increased risk). Also, provide the current core damage frequency (CDF) and large early release frequency (LERF) of record for all applicable hazards.
- b. NEI 17-04 Section 3.1 Data Collection specifies that information elements that should be collected and identified as new information for the Stage 1 assessment include plant changes not yet incorporated into plant risk models. Are there any forthcoming model revisions and/or updated modeling techniques that may significantly impact the results of the SAMA evaluation?
- c. Identify and summarize examples of changes that have been implemented at Peach Bottom since the performance of the Peach Bottom SAMA analysis that are risk-beneficial.
- d. Describe any Peach Bottom power uprates and the impacts on risk at Peach Bottom. What was the change in CDF and LERF as a result of the extended power uprate, measurement uncertainty recapture and conversion to MELLLA+. Was the total change to CDF and LERF as a result of the uprates less than 30%?
- e. As provided in the updated 2013 GEIS, peak fuel burnup was considered new information. What is the estimated average peak fuel burnup at Peach Bottom during the subsequent period of extended operation?
- 2. Guidance in NEI 17-04 specifies, Without the insights of an updated Level 3 model and MB calculation, it is difficult to correlate specific changes to the CDF and Level 2 release categories to an averted cost-risk; therefore, in this stage of the analysis [Referring to the Stage 1 analysis], the approach is to bound the impact by demonstrating that SAMA implementation would not reduce the CDF or any of the Level 2 release category frequencies by 50 percent or more. If this can be demonstrated, it can be inferred that the SAMAs averted cost-risk would not be more than 50 percent of the MB. This is because the averted cost-risk is directly tied to the changes in CDF and the Level 2 release category frequencies.
Regarding Stage 1 of the analysis, guidance in NEI 17-04 clarifies:
This step is similar to the Phase 1 screening process in NEI 05-01 with the exceptions that SAMAs are not eliminated due to excessive implementation cost (because an updated MB (maximum benefit) is not developed for the Stage 1 analysis) and SAMAs with very low benefits are not exempted from an explicit risk reduction assessment.
Section 3.3 of NEI 17-04 describes the stage 2 process and states:
If the Stage 1 analysis cannot definitively determine that all of the Unimplemented Phase 2 and Unscreened Industry SAMAs have averted cost-risk values that are less than 50% of the MB, it will be necessary to perform a more detailed averted cost-risk calculation for the potentially significant SAMAs. This requires an update of the Level 3 consequence model and recalculation of the averted cost-risk for each potentially significant SAMA using the latest plant risk models.
- a. Describe the pre-screening criterion used to exclude any of the Peach Bottom Phase 2 SAMA candidates from further consideration, including the rationale for any deviations from the screening criteria provided in NEI 17-04. Specifically, justify the screening criterion named Reclassified as a Phase 1 SAMA. Was the maximum benefit updated for the Stage 1 analysis?
- b. Please clarify how the determination that SAMAs 3, 4, 5, 7, 8, 9, 10, 14, 16, 19, 20, 22, 23, 24, 25, 26, 28, and 29 were screened out in Stage 1 due to cost (exceeding the maximum benefit calculated in the original SAMA analysis) was performed. Were there any SAMAs determined to reduce the CDF or any of the Level 2 release category frequencies by 50 percent or more? Clarify how this screening approach is equivalent to the Stage 1 assessment described in NEI 17-04. If an equivalent process to Stage 1 is not used, please provide an explanation of the process by which they will be further considered/ evaluated by Exelon.
- 3. Guidance in NEI 17-04 Section 3.1 Data Collection specifies:
Use the latest risk models that are available for internal events (including internal flooding) and for each of the external events contributors identified for evaluation in NEI 05-01 [Severe Accident Mitigation Alternatives (SAMA) Analysis Guidance Document, Revision A, November 2005].
Guidance in NEI 05-01 specifies:
The IPEEE [Individual Plant Examination of External Events] identified the highest risk externally initiated accident sequences and potential means of reducing the risk posed by those sequences.
Typically, the following external events were evaluated:
- Other external events such as high wind events, external flooding, transportation and nearby facility accidents
- a. Explain how Other external events such as high wind events, external flooding, transportation and nearby facility accidents were considered in the Peach Bottom SAMA New and Significant Evaluation. Discuss recommendations to reduce risk due to each of these external events.
- b. Were there any Peach Bottom or other facility external event SAMAs evaluated? If so, briefly describe.
If not, indicate the reason why.
- c. Information from the Peach Bottom Postulated Accidents New and Significant Review Document is needed for the NRC staffs evaluation as it relates to external events.
Table 3 of the Peach Bottom Postulated Accidents New and Significant Review Document lists the fire and seismic CDF estimates for Peach Bottom, as reported during 1990 and 2016. Please confirm the statement, the fire and seismic CDFs for PBAPS calculated in 2016, as well as the sum of the two, were less than 5.4E-5 per reactoryear, which was the internal events mean value CDF for all BWRs used in the 2013 GEIS to estimate probability-weighted, offsite consequences from airborne, surface water, and groundwater pathways, as well as the resulting economic impacts from such pathways.
- 4. Guidance in NEI 17-04 Section 3.1 Data Collection specifies:
The following is one of the information elements that should be collected and identified as new information for the Stage 1 assessment:
For those plants that have not maintained a full level 2 model, it will be necessary to either update the Level 2 model or develop a process by which the relevant release category frequencies can be estimated for each SAMA considered to ensure the full spectrum of plant risk can be accounted for in the Stage 1 assessment.
Exelon developed a process by which the relevant release category frequencies can be estimated for each SAMA considered in the supporting documentation (Peach Bottom Postulated Accidents New and Significant Review document). Please provide justification for this new approach including how similar plants were chosen, how the seismic accident class frequencies are used to estimate the relevant Level 2 release category frequencies, how they are used in the Stage 1 assessment for the potential significance of new information, and how specific release categories were considered significant or insignificant. Please provide specific details regarding how the sum of the two release frequencies not exceeding 80% is equivalent to a release frequency of 50% in one release category. Also, provide details regarding how LaSalle (with a Mark 2) containment was considered equivalent in this alternative approach. Further, clarify if SAMAs with very low benefits were exempted from the risk reduction assessment.
- 5. The ER states, Estimated population increase is within the range determined by the NRC in the 2013 GEIS to not be significant. Please summarize Exelons evaluation of population.