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| | number = ML15219A016 | | | number = ML15219A016 |
| | issue date = 08/13/2015 | | | issue date = 08/13/2015 |
| | title = Diablo Canyon Power Plant, Units 1 and 2 - Supplemental Information Needed for Acceptance of Requested Licensing Action, License Amendment Request to Revise Licensing Basis to Adopt the Alternative Source Term (TAC Nos. MF6399 and MF6400) | | | title = Supplemental Information Needed for Acceptance of Requested Licensing Action, License Amendment Request to Revise Licensing Basis to Adopt the Alternative Source Term |
| | author name = Lingam S P | | | author name = Lingam S |
| | author affiliation = NRC/NRR/DORL/LPLIV-1 | | | author affiliation = NRC/NRR/DORL/LPLIV-1 |
| | addressee name = Halpin E D | | | addressee name = Halpin E |
| | addressee affiliation = Pacific Gas & Electric Co | | | addressee affiliation = Pacific Gas & Electric Co |
| | docket = 05000275, 05000323 | | | docket = 05000275, 05000323 |
| | license number = DPR-080, DPR-082 | | | license number = DPR-080, DPR-082 |
| | contact person = Lingam S P | | | contact person = Lingam S |
| | case reference number = TAC MF6399, TAC MF6400 | | | case reference number = TAC MF6399, TAC MF6400 |
| | document type = Letter | | | document type = Letter |
| | page count = 3 | | | page count = 3 |
| | project = TAC:MF6399, TAC:MF6400 | | | project = TAC:MF6399, TAC:MF6400 |
| | stage = Supplement | | | stage = Acceptance Review |
| }} | | }} |
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| =Text= | | =Text= |
| {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION . WASHINGTON, D.C. 20555-0001 August 13, 2015 Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Ei'ectric Company Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6 Avila Beach, CA 93424 | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION |
| | . WASHINGTON, D.C. 20555-0001 August 13, 2015 Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Ei'ectric Company Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6 Avila Beach, CA 93424 |
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| ==SUBJECT:== | | ==SUBJECT:== |
| DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 -SUPPLEMENTAL INFORMATION NEEDED FOR ACCEPTANCE OF REQUESTED LICENSING ACTION RE: REVIEW OF ALTERNATIVE SOURCE TERM LICENSE AMEN.DMENT REQUEST (TAC NOS. MF6399 AND MF6400) | | DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - SUPPLEMENTAL INFORMATION NEEDED FOR ACCEPTANCE OF REQUESTED LICENSING ACTION RE: REVIEW OF ALTERNATIVE SOURCE TERM LICENSE AMEN.DMENT REQUEST (TAC NOS. MF6399 AND MF6400) |
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| ==Dear Mr. Halpin:== | | ==Dear Mr. Halpin:== |
| By letter dated June 17, 2015 (Agencywide Documents Access and Management System Accession No. ML 15176A539), Pacific Gas and Electric Company (PG&E, the licensee) submitted a license amendment request (LAR) for Diablo Canyon Power Plant (DCPP), Unit Nos. 1 and 2. The proposed amendment would revise the licensing bases of DCPP, Unit Nos. 1 and 2 to adopt the alternative source term (AST) as allowed by Title 10 of the Code of Federal Regulations, Part 50, Section 50.67, "Accident source term." The AST methodology as established in U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide 1.183, "Alternative Radi9logical Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors," July 2000 (ADAMS Accession No. ML003716792), is used to calculate the offsite and control room radiological consequence for DCPP, Unit Nos. 1 and 2. The purpose of this letter is to provide the results of the NRC staff's acceptance review of this amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant. Consistent with 10 CFR 50.90, an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. | | |
| Section 50.34 of 10 CFR addresses the content of technical information required. | | By letter dated June 17, 2015 (Agencywide Documents Access and Management System Accession No. ML15176A539), Pacific Gas and Electric Company (PG&E, the licensee) submitted a license amendment request (LAR) for Diablo Canyon Power Plant (DCPP), Unit Nos. 1 and 2. The proposed amendment would revise the licensing bases of DCPP, Unit Nos. 1 and 2 to adopt the alternative source term (AST) as allowed by Title 10 of the Code of Federal Regulations, Part 50, Section 50.67, "Accident source term." The AST methodology as established in U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide 1.183, "Alternative Radi9logical Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors," |
| This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations. | | July 2000 (ADAMS Accession No. ML003716792), is used to calculate the offsite and control room radiological consequence for DCPP, Unit Nos. 1 and 2. |
| | The purpose of this letter is to provide the results of the NRC staff's acceptance review of this amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant. |
| | Consistent with 10 CFR 50.90, an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations. |
| In order to make the application complete, the NRC staff requests that PG&E supplement the application to address the following information by August 25, 2015: | | In order to make the application complete, the NRC staff requests that PG&E supplement the application to address the following information by August 25, 2015: |
| * In Appendix B of Attachment 4 of the LAR, the thermal-hydraulic inputs to the accident dose calculations have been changed from the current licensing basis (CLB) without providing justification. | | * In Appendix B of Attachment 4 of the LAR, the thermal-hydraulic inputs to the accident dose calculations have been changed from the current licensing basis (CLB) without providing justification. For NRC to accept the LAR, the NRC staff |
| For NRC to accept the LAR, the NRC staff E. Halpin requires justification for these changes made to the.thermal-hydraulic analysis from the CLB to the AST contained in Appendix B of Attachment 4 of the LAR. | | |
| * Please provide a license condition indicating that the modifications will be completed in support of the commitments made in Attachment 7 of the LAR. During the clarification call on July 28, 2015, the licensee stated that these . modifications will be implemented prior to issuance of the LAR. Once NRC staff receives the above requested information, the staff will perform an audit of the analyses to verify the accuracy of the* information provided by the licensee. | | E. Halpin requires justification for these changes made to the.thermal-hydraulic analysis from the CLB to the AST contained in Appendix B of Attachment 4 of the LAR. |
| The NRC staff will then proceed to complete its detailed technical review. If the information responsive to the NRC staff's request is not received by the above date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC staff will cease its review activities associated with the application. | | * Please provide a license condition indicating that the modifications will be completed in support of the commitments made in Attachment 7 of the LAR. |
| If the application is subsequently accepted for review, you will be advised of any further information needed to support the NRC staff's detailed technical review by separate correspondence. | | During the clarification call on July 28, 2015, the licensee stated that these |
| The information requested and associated time frame in this letter were discussed during the conference call held with your staff on July 28, 2015, and also with Mr. Phillippe Soenen on August 6, 2015. If you have any questions regarding this matter, I may be reached at 301-415-1564. | | . modifications will be implemented prior to issuance of the LAR. |
| Docket Nos. 50-275 and 50-323 cc: Additional Distribution via Listserv Sincerely, Siva P. Lingam, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation E. Halpin requires justification for these changes made to the thermal-hydraulic analysis from the CLB to the AST contained in Appendix B of Attachment 4 of the LAR.
| | Once NRC staff receives the above requested information, the staff will perform an audit of the analyses to verify the accuracy of the* information provided by the licensee. The NRC staff will then proceed to complete its detailed technical review. If the information responsive to the NRC staff's request is not received by the above date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC staff will cease its review activities associated with the application. If the application is subsequently accepted for review, you will be advised of any further information needed to support the NRC staff's detailed technical review by separate correspondence. |
| * Please provide a license condition indicating that the modifications will be completed in support of the commitments made in Attachment 7 of the LAR. During the clarification call on July 28, 2015, the licensee stated that these modifications will be implemented prior to issuance of the LAR. Once NRC staff receives the above requested information, the staff will perform an audit of the analyses to verify the accuracy of the information provided by the licensee.
| | The information requested and associated time frame in this letter were discussed during the conference call held with your staff on July 28, 2015, and also with Mr. Phillippe Soenen on August 6, 2015. |
| The NRC staff will then proceed to complete its detailed technical review. If the information responsive to the NRC staff's request is not received by the above date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC staff will cease its review activities associated with the application.
| | If you have any questions regarding this matter, I may be reached at 301-415-1564. |
| If the application is subsequently accepted for review, you will be advised of any further information needed to support the NRC staff's detailed technical review by separate correspondence.
| | Sincerely, |
| The information requested and associated time frame in this letter were discussed during the conference call held with your staff on July 28, 2015, and also with Mr. Phillippe Soenen on August 6, 2015. If you have any questions regarding this matter, I may be reached at 301-415-1564.
| | ~r*~ |
| Docket Nos. 50-275 and 50-323 cc: Additional Distribution via Listserv DISTRIBUTION: | | Siva P. Lingam, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 cc: Additional Distribution via Listserv |
| PUBLIC LPL4-1 Reading RidsAcrsAcnw_MailCTR Resource RidsNrrDorllpl4-1 Resource RidsNrrDssSrxb Resource ADAMS Accession No.: ML 15219A016 OFFICE NRR/DORL/LPL4-1
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| /PM NRR/DORL/LPL4-1/LA NAME Slingam JBurkhardt DATE 8/11/15 8/11/15 Sincerely, IRA/ Siva P. Lingam, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrLAJBurkhardt Resource RidsNrrPMDiabloCanyon Resource RidsRgn4MailCenter Resource MHardgrove, NRR/DSS/SRXB NRR/DSS/SRXB/BC NRR/DORL/LPL4-1/BC NRR/DORL/LPL4-1 | | ML15219A016 OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1/LA NRR/DSS/SRXB/BC NRR/DORL/LPL4-1/BC NRR/DORL/LPL4-1 /PM NAME Slingam JBurkhardt CJackson MMarkley (LRegner for). SLingam DATE 8/11/15 8/11/15 8/12/15 8/13/15 8/13/15}} |
| /PM CJackson MMarkley (LRegner for). SLingam 8/12/15 8/13/15 8/13/15 OFFICIAL RECORD COPY}} | |
Letter Sequence Acceptance Review |
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MONTHYEARML15191A4942015-07-10010 July 2015 NRR E-mail Capture - NRC Staff'S Acceptance Review Determination, Entergy Fleet Relief Request EN-15-1 Proposed Alternative to Use ASME Code Case N-789-1 (TAC Nos. MF6340-MF6349) Project stage: Acceptance Review ML15219A0162015-08-13013 August 2015 Supplemental Information Needed for Acceptance of Requested Licensing Action, License Amendment Request to Revise Licensing Basis to Adopt the Alternative Source Term Project stage: Acceptance Review DCL-15-105, Supplement to License Amendment Request 15-03, Application of Alternative Source Term.2015-08-31031 August 2015 Supplement to License Amendment Request 15-03, Application of Alternative Source Term. Project stage: Supplement ML15252A0062015-09-0808 September 2015 NRR E-mail Capture - Diablo Canyon, Units 1 and 2 - Acceptance Review of LAR 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: Acceptance Review ML15265A6002015-09-22022 September 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML15266A5322015-09-23023 September 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML15278A0492015-10-0101 October 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML15280A4432015-10-0707 October 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML15293A6022015-10-20020 October 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML15336A1022015-12-0202 December 2015 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI ML16004A3542015-12-11011 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Terms Summary of Dose Analysis & Results, Revision 1 Project stage: Response to RAI ML16004A3562015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. Project stage: Response to RAI ML16004A3552015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Regulatory Guide 1.183 Conformance Tables, Revision 1 Project stage: Response to RAI ML16004A3572015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 2 of 3 Project stage: Response to RAI DCL-15-152, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 3 of 32015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 3 of 3 Project stage: Response to RAI ML16004A3612015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 1 of 3 Project stage: Response to RAI ML16011A3172016-01-11011 January 2016 NRR E-mail Capture - Diablo Canyon 1 and 2 - Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 Project stage: RAI DCL-16-019, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term.2016-02-10010 February 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. Project stage: Response to RAI ML16048A2322016-02-17017 February 2016 NRR E-mail Capture - Diablo Canyon 1 and 2 - Met Data Second Round of Requests for Additional Information for License Amendment Request 15-03 to Adopt the Alternative Source Term Per 10 CFR 50.67 (TAC Nos. MF6399 and MF640 Project stage: RAI ML16071A4412016-03-0707 March 2016 Entergy Fleet Relief Request No. RR-EN-15-1-Proposed Alternative to Use ASME Code Case N-789-1 - E-mail from G.Davant to R.Guzman - Response to Second RAI (MF6340 - MF6349) Project stage: Request DCL-16-044, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term.2016-04-21021 April 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. Project stage: Response to RAI 2015-08-31
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Category:Letter
MONTHYEARML24260A1222024-09-14014 September 2024 14 Sept 2024 Ltr - California Coastal Commission to Pg&E, Incomplete Consistency Certification for Requested Nuclear Regulatory Commission License Renewal for Diablo Canyon Power Plant DCL-24-087, License Renewal - Historic and Cultural Resources Reference Documents (Redacted)2024-09-12012 September 2024 License Renewal - Historic and Cultural Resources Reference Documents (Redacted) ML24262A2462024-09-11011 September 2024 10 CFR 2.206 - Diablo Canyon Units 1 and 2 Seismic - Petitioner Response to Acknowledgement Letter - DCL-24-083, CFR Part 21 Notification: Commercially Dedicated Snubber Valve Not Properly Heat Treated2024-09-0909 September 2024 CFR Part 21 Notification: Commercially Dedicated Snubber Valve Not Properly Heat Treated DCL-24-078, Pre-Notice of Disbursement from Decommissioning Trust2024-09-0303 September 2024 Pre-Notice of Disbursement from Decommissioning Trust DCL-24-082, Decommissioning Draft Biological Assessment and Draft Essential Fish Habitat Assessment2024-08-28028 August 2024 Decommissioning Draft Biological Assessment and Draft Essential Fish Habitat Assessment ML24205A0662024-08-27027 August 2024 OEDO-24-00083 - 10 CFR 2.206 - Ack Letter - Diablo Canyon Units 1 and 2 Seismic Core Damage Frequency - IR 05000275/20243012024-08-26026 August 2024 NRC Examination Report 05000275/2024301; 05000323/2024301 IR 05000275/20240052024-08-22022 August 2024 Updated Inspection Plan for Diablo Canyon Power Plant, Units 1 and 2 (Report 05000275/2024005 and 05000323/2024005) DCL-24-077, Responses to NRC Requests for Additional Information on Diablo Canyon Power License Renewal Application Severe Accident2024-08-15015 August 2024 Responses to NRC Requests for Additional Information on Diablo Canyon Power License Renewal Application Severe Accident DCL-24-075, Response to Request for Additional Information for License Amendment Request 23-02, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power React2024-08-0808 August 2024 Response to Request for Additional Information for License Amendment Request 23-02, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power React IR 05000275/20240022024-08-0606 August 2024 Integrated Inspection Report 05000275/2024002 and 05000323/2024002 DCL-24-070, License Amendment Request 24-03 Revision to Technical Specification 5.5.16 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies2024-07-31031 July 2024 License Amendment Request 24-03 Revision to Technical Specification 5.5.16 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies DCL-24-071, Core Operating Limits Report for Unit 2 Cycle 252024-07-22022 July 2024 Core Operating Limits Report for Unit 2 Cycle 25 DCL-2024-523, Submittal of Report on Discharge Self-Monitoring2024-07-18018 July 2024 Submittal of Report on Discharge Self-Monitoring ML24187A1352024-07-16016 July 2024 Letter to Paula Gerfen - Diablo Canyon Units 1 and 2 - Summary of June 2024 Audit Related to the License Renewal Application Severe Accident Mitigation Alternatives Review IR 05000275/20240142024-07-11011 July 2024 Age-Related Degradation Inspection Report 05000275/2024014 and 05000323/2024014 IR 05000275/20244012024-07-0808 July 2024 Security Baseline Inspection Report 05000275/2024401 and 05000323/2024401 (Full Report) IR 05000323/20240112024-07-0303 July 2024 License Renewal Phase Report 05000323/2024011 DCL-2024-527, Sea Turtle Stranding Report (Loggerhead Sea Turtle) Diablo Canyon Power Plant2024-07-0101 July 2024 Sea Turtle Stranding Report (Loggerhead Sea Turtle) Diablo Canyon Power Plant DCL-24-066, Request to Extend the Nrg Approval of Alternative for Use of Full Structural Weld Overlay, REP-RHR-SWOL2024-06-27027 June 2024 Request to Extend the Nrg Approval of Alternative for Use of Full Structural Weld Overlay, REP-RHR-SWOL ML24155A2182024-06-18018 June 2024 OEDO-23-00350-NRR - (LTR-23-0228-1) - Closure Letter - 10 CFR 2.206 Petition from Mothers for Peace and Friends of the Earth Regarding Diablo Canyon ML24129A1762024-06-14014 June 2024 National Historic Preservation Act Section 106 Consultation – Results of Identification and Evaluation (Docket Number: 72-026) ML24200A2052024-06-0707 June 2024 Fws to NRC, List of Threatened and Endangered Species That May Occur in Your Proposed Project Location or May Be Affected by Your Proposed Project for Diablo Canyon License Renewal ML24099A2192024-05-29029 May 2024 Issuance of Amendment Nos. 245 and 247 Revision to TSs to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML24117A0132024-05-20020 May 2024 Letter to Paula Gerfen-Diablo Canyon Units 1 and 2-Regulatory Audit Regarding Severe Accident Mitigation Alternatives for the License Renewal Application DCL-24-054, LCO 3.0.3 Completion Time Limits2024-05-17017 May 2024 LCO 3.0.3 Completion Time Limits DCL-24-052, Responses to NRC Requests for Additional Information on the Diablo Canyon Power Plant License Renewal Application Environmental Report2024-05-16016 May 2024 Responses to NRC Requests for Additional Information on the Diablo Canyon Power Plant License Renewal Application Environmental Report DCL-24-051, One Hundred Eighty Day Steam Generator Report for Twenty-Fourth Refueling Outage2024-05-0808 May 2024 One Hundred Eighty Day Steam Generator Report for Twenty-Fourth Refueling Outage ML24127A2042024-05-0202 May 2024 02May2024 Ltr - California Coastal Commission to Pg&E, Coastal Development Permit Needed for Pg&E’S Proposed Relicensing of Diablo Canyon Nuclear Power Plant DCL-24-047, 2023 Annual Non-radiological Environmental Operating Report2024-05-0101 May 2024 2023 Annual Non-radiological Environmental Operating Report DCL-24-049, 2023 Annual Radiological Environmental Operating Report2024-05-0101 May 2024 2023 Annual Radiological Environmental Operating Report L-24-004, Independent Spent Fuel Storage Installation - Responses to NRC Requests for Additional Information on the Diablo Canyon Independent Spent Fuel Storage Installation License Renewal Application (Cac/Epid 001028/L-2022-RNW-0007)2024-04-30030 April 2024 Independent Spent Fuel Storage Installation - Responses to NRC Requests for Additional Information on the Diablo Canyon Independent Spent Fuel Storage Installation License Renewal Application (Cac/Epid 001028/L-2022-RNW-0007) DCL-24-048, O CFR 50.59 and 1 O CFR 72.48 Summary Report for the Period of January 1, 2022, Through December 31, 20232024-04-30030 April 2024 O CFR 50.59 and 1 O CFR 72.48 Summary Report for the Period of January 1, 2022, Through December 31, 2023 DCL-24-027, 2023 Annual Radioactive Effluent Release Report2024-04-28028 April 2024 2023 Annual Radioactive Effluent Release Report DCL-24-045, Annual Report of Occupational Radiation Exposure for 20232024-04-24024 April 2024 Annual Report of Occupational Radiation Exposure for 2023 IR 05000275/20240012024-04-23023 April 2024 Integrated Inspection Report 05000275/2024001 and 05000323/2024001 ML24114A2032024-04-22022 April 2024 Request for Information for EP Program and Performance Indicator Verification Inspection (Wolf Creek Nuclear Generating Station) Inspection Report 05000482/2024003 ML24106A2882024-04-18018 April 2024 License Renewal Application Environmental Review RCIs and RAIs ML24106A2892024-04-18018 April 2024 Letter to Paula Gerfen - Diablo Canyon Units 1 and 2 - Summary of March 2024 Audit Regarding the Environmental Review of the License Renewal Application DCL-24-042, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations2024-04-17017 April 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations ML24108A1122024-04-15015 April 2024 License Amendment Request 24-02 Request for Approval of DCPP Early Warning System to Meet 10 CFR 73.55(i)(2) and 10 CFR 73.55(e)(9)(vi)(A) DCL-24-022, Notification of Changes to Decommissioning Schedule2024-04-0202 April 2024 Notification of Changes to Decommissioning Schedule DCL-24-023, Revised Certification of Permanent Cessation of Power Operations2024-04-0202 April 2024 Revised Certification of Permanent Cessation of Power Operations DCL-24-031, Decommissioning Funding Report2024-03-27027 March 2024 Decommissioning Funding Report DCL-24-032, 2024 Annual Statement of Insurance for Pacific Gas and Electric Company’S Diablo Canyon Power Plant2024-03-27027 March 2024 2024 Annual Statement of Insurance for Pacific Gas and Electric Company’S Diablo Canyon Power Plant ML24082A2592024-03-25025 March 2024 Notice of Enforcement Discretion for Diablo Canyon Power Plant, Unit 2 (EPID L-2024-LLD-0002) - March 25, 2024 ML24081A0462024-03-22022 March 2024 Audit Summary in Support of the License Amendment Request to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b DCL-24-028, Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability2024-03-21021 March 2024 Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability ML24081A4052024-03-21021 March 2024 Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability 2024-09-09
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UNITED STATES NUCLEAR REGULATORY COMMISSION
. WASHINGTON, D.C. 20555-0001 August 13, 2015 Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Ei'ectric Company Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6 Avila Beach, CA 93424
SUBJECT:
DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - SUPPLEMENTAL INFORMATION NEEDED FOR ACCEPTANCE OF REQUESTED LICENSING ACTION RE: REVIEW OF ALTERNATIVE SOURCE TERM LICENSE AMEN.DMENT REQUEST (TAC NOS. MF6399 AND MF6400)
Dear Mr. Halpin:
By letter dated June 17, 2015 (Agencywide Documents Access and Management System Accession No. ML15176A539), Pacific Gas and Electric Company (PG&E, the licensee) submitted a license amendment request (LAR) for Diablo Canyon Power Plant (DCPP), Unit Nos. 1 and 2. The proposed amendment would revise the licensing bases of DCPP, Unit Nos. 1 and 2 to adopt the alternative source term (AST) as allowed by Title 10 of the Code of Federal Regulations, Part 50, Section 50.67, "Accident source term." The AST methodology as established in U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide 1.183, "Alternative Radi9logical Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors,"
July 2000 (ADAMS Accession No. ML003716792), is used to calculate the offsite and control room radiological consequence for DCPP, Unit Nos. 1 and 2.
The purpose of this letter is to provide the results of the NRC staff's acceptance review of this amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.
Consistent with 10 CFR 50.90, an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.
In order to make the application complete, the NRC staff requests that PG&E supplement the application to address the following information by August 25, 2015:
- In Appendix B of Attachment 4 of the LAR, the thermal-hydraulic inputs to the accident dose calculations have been changed from the current licensing basis (CLB) without providing justification. For NRC to accept the LAR, the NRC staff
E. Halpin requires justification for these changes made to the.thermal-hydraulic analysis from the CLB to the AST contained in Appendix B of Attachment 4 of the LAR.
- Please provide a license condition indicating that the modifications will be completed in support of the commitments made in Attachment 7 of the LAR.
During the clarification call on July 28, 2015, the licensee stated that these
. modifications will be implemented prior to issuance of the LAR.
Once NRC staff receives the above requested information, the staff will perform an audit of the analyses to verify the accuracy of the* information provided by the licensee. The NRC staff will then proceed to complete its detailed technical review. If the information responsive to the NRC staff's request is not received by the above date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC staff will cease its review activities associated with the application. If the application is subsequently accepted for review, you will be advised of any further information needed to support the NRC staff's detailed technical review by separate correspondence.
The information requested and associated time frame in this letter were discussed during the conference call held with your staff on July 28, 2015, and also with Mr. Phillippe Soenen on August 6, 2015.
If you have any questions regarding this matter, I may be reached at 301-415-1564.
Sincerely,
~r*~
Siva P. Lingam, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 cc: Additional Distribution via Listserv
ML15219A016 OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1/LA NRR/DSS/SRXB/BC NRR/DORL/LPL4-1/BC NRR/DORL/LPL4-1 /PM NAME Slingam JBurkhardt CJackson MMarkley (LRegner for). SLingam DATE 8/11/15 8/11/15 8/12/15 8/13/15 8/13/15