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MONTHYEARML0810102072008-04-0303 April 2008 Diablo Canon, Units 1 & 2 - License Amendment Request 08-02, Revision to Technical Specification 3.7.5, Auxiliary Feedwater System and 3.7.6 Condensate Storage Tank and Fire Water Storage Tank Project stage: Other ML0815405402008-06-0404 June 2008 Amendments Auxiliary Feedwater and Condensate Storage Tanks (TACs MD8471 and MD8472) Project stage: Other DCL-08-023, Supplement to License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank.2008-06-20020 June 2008 Supplement to License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank. Project stage: Supplement ML0825404362008-07-24024 July 2008 Email Sending Request for Additional Information, Revise TS 3.7.5, Auxiliary Feedwater System and 3.7.6, Condensate Storage Tank and Fire Water Storage Tank Project stage: RAI ML0825404962008-07-24024 July 2008 Draft Diablo Canyon, Units 1 and 2, Request for Additional Information, Revise TS 3.7.5, Auxiliary Feedwater System and 3.7.6, Condensate Storage Tank and Fire Water Storage Tank Project stage: Draft RAI ML0820407482008-08-0101 August 2008 Acceptance Review of Proposed Amendments Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' & 3.7.6, 'Condensate Storage Tank & Fire Water Storage Tank (Tac Nos. MD8471 and MD8472) Project stage: Acceptance Review ML0828314432008-09-21021 September 2008 CST Rai'S (Email) Project stage: Other ML0826702672008-09-21021 September 2008 Request for Additional Information on Condensate Storage Tank Level Amendment Project stage: RAI DCL-08-081, Response to Request for Additional Information, License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank.'2008-10-0101 October 2008 Response to Request for Additional Information, License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank.' Project stage: Response to RAI ML0906904322008-11-0404 November 2008 Unit Nos.1 and 2 - Email Request for Additional Information Re License Amendment Request Project stage: RAI DCL-08-093, Response to NRC Request for Additional Information Regarding License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water..2008-11-0606 November 2008 Response to NRC Request for Additional Information Regarding License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water.. Project stage: Response to RAI ML0906902942008-11-21021 November 2008 Meeting Slide, Spectra 6.5 Slide from Pacific Gas and Electric Regarding License Amendment Request Re AFW System and CST, Diablo Canyon Power Plant, Unit Nos. 1 and 2 Project stage: Meeting ML0906902422008-11-21021 November 2008 Email from Pacific Gas and Electric Regarding Spectra 6.5 Slide, License Amendment Request Re AFW System and CST Project stage: Request DCL-08-106, Response to NRC RAI Regarding License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank2008-12-16016 December 2008 Response to NRC RAI Regarding License Amendment Request 08-02, Revision to Technical Specifications 3.7.5, 'Auxiliary Feedwater System,' and 3.7.6, 'Condensate Storage Tank and Fire Water Storage Tank Project stage: Response to RAI ML0906308082009-03-30030 March 2009 Issuance of Amendment Nos. 204 and 205, Revise TS 3.7.5, Auxiliary Feedwater (AFW) System, and TS 3.7.6, Condensate Storage Tank (CST) and Fire Water Storage Tank (Fwst) Project stage: Approval 2008-04-03
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Category:Memoranda
MONTHYEARML24157A0252024-07-0101 July 2024 Memo to Michelle Rome Summary of 4/4/2024 Meeting with CA Shpo ML24143A1202024-06-0303 June 2024 Memo to Michelle Rome Summary of 4/5/2024 Meeting with Ytt ML24108A1482024-05-0707 May 2024 February 2024 Environmental Scoping Meetings Related to the Diablo Canyon LRA - Memo ML23265A1902023-09-26026 September 2023 Meeting Summary: September 13, 2023 Diablo Canyon, Units 1 and 2 License Renewal Application Pre-Application Meeting ML23143A2262023-06-0101 June 2023 May 3, 2023, Summary of Public Meeting to Discuss the End of Cycle Assessment and Pre-Submittal License Renewal Process Overview for Diablo Canyon Power Plant, Units 1 and 2 ML23046A0292023-02-23023 February 2023 Timely Renewal Exemption 5 Day Memorandum ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22131A1592022-05-11011 May 2022 Reply to the Nrc'S Response to the Office of the Inspector General'S (OIG) Event Inquiry Into the Nrc'S Oversight of the Auxiliary Feedwater System at Diablo Canyon Nuclear Power Plant, OIG Case No. 20-025 ML22109A1792022-05-0303 May 2022 Response OIG Special Inquiry Into Nrc'S Oversight AFW at Diablo Canyon (OIG Case No. 20-025) ML22108A1672022-05-0303 May 2022 Staff Assessment of OIG Event Inquiry Into the Nrc'S Oversight AFW at Diablo Canyon (OIG Case No. 20-025) ML21146A1852021-06-28028 June 2021 DC RFI 2021401 ML21146A185 ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary ML21060B1822021-03-0101 March 2021 Memorandum: 1-26-21 Diablo Canyon Renewal Pre-Application Meeting Summary ML19318F5272019-11-15015 November 2019 Summary of the August 27, 2019, Public Meeting Near the Diablo Canyon Nuclear Power Plant Regarding the Establishment and Operation of Community Advisory Boards ML19182A3562019-07-23023 July 2019 Quarterly Report on the Status of Public Petitions Under Title 10 of the Code of Federal Regulations, Section 2.206 - April 1 to June 30, 2019 ML18298A0762018-10-26026 October 2018 Notice of Forthcoming Closed Meeting with Pacific Gas and Electric Company to Discuss Security-Related Information for Diablo Canyon Power Plant, Units 1 and 2 ML18173A0082018-06-20020 June 2018 Cancelling Numerous Inspection Report Numbers ML18131A0482018-05-11011 May 2018 Memorandum to File Environmental Assessment and Finding of No Significant Impact for Pacific Gas and Electric Company'S Decommissioning Funding Plan Submitted in Accordance with 10 CFR 72.30(b) for the Diablo Canyon Independent Spent Fuel S ML16119A5002016-04-29029 April 2016 Notice of Forthcoming Closed Meeting with Pacific Gas & Electric Company to Discuss Proposed Change to Defensive Strategy and 10 CFR 50.54(p) Documentation for Reduction in Minimum Staffing Requirements at Diablo Canyon ML16088A2042016-03-28028 March 2016 Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template) ML16088A2052016-03-28028 March 2016 Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations ML16029A2322016-03-16016 March 2016 LTR-15-0337-1 - Diablo Canyon Power Plant, Units 1 and 2 - Closure of 10 CFR 2.206 Petition from Bullard High School Students (CAC Nos. MF6515 and MF6516) ML15125A1862015-05-27027 May 2015 April 28, 2015, Summary of Category 1 Public Meeting with Pacific Gas and Electric Company to Discuss Diablo Canyon'S Seismic Hazard Reevaluation Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2. ML14344A6302014-12-15015 December 2014 Close-out letter-California Facilities Preemption Safety Evaluation ML14167A4922014-07-0303 July 2014 Summary of June 5, 2014, Conference Call to Discuss the Status of the License Renewal Application Review of the Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML14022A1202014-06-23023 June 2014 Memorandum to File, Review of Revision 21 of Final Safety Analysis Report Update ML14162A4582014-06-12012 June 2014 Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2, Regulatory Audit in Support of the License Amendment Request to Implement Risk-Informed, Performance-Based, Fire Protection Program as Allowed by Title 10 of the Code ML13339A4282014-04-28028 April 2014 Transmittal Memorandum for Regulatory Audit Report for the August 6, 2013 Through August 8, 2013 Cyber Security Pilot Study at Dcnpp Avila Beach, CA ML13312A6462013-11-25025 November 2013 Meeting Notice with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13290A2272013-10-18018 October 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13263A1922013-09-24024 September 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13260A0052013-09-18018 September 2013 10/2/13 Notice of Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 ML13246A4262013-09-0505 September 2013 Notice of Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B at Diablo Canyon, Units 1 and 2 ML13246A4072013-09-0505 September 2013 9/25/13 Notice of Forthcoming Pre-Application Meeting to Discuss Emergency Core Cooling System Evaluations for License Amendment Request at Diablo Canyon, Units 1 and 2 ML13246A4162013-09-0505 September 2013 9/24/13 - Notice of Pre-Application Meeting to Discuss License Amendment Request for Technical Specification 3.8.1 Diesel Generator Surveillance Requirements at Diablo Canyon, Units 1 and 2 ML13246A2622013-09-0404 September 2013 9/18/13 Notice of Forthcoming Closed Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13179A0622013-07-0909 July 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13163A0242013-06-12012 June 2013 6/26/13 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13126A0872013-05-0707 May 2013 Notice of Forthcoming 5/29/13 Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13101A2782013-04-24024 April 2013 Transmittal Memo for Regulatory Audit Report for the February 11-14, 2013 Cyber Security Pilot Study at the CS Innovation Facility in Scottsdale, Arizona ML13081A0742013-04-11011 April 2013 Summary Conference Call Between Pacific and Electric Co., and NRC Regarding Verbal Authorization of Relief Request Rep-1 U2, Revision 2 ML13074A1182013-03-15015 March 2013 3/27/13 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13052A5512013-02-21021 February 2013 Preapplication Meeting with Pacific Gas and Electric, License Amendment Request to Adopt NFPA-805 Performance-Based Standard for Fire Protection for LWR Generating Plants, at Diablo Canyon, Units 1 and 2 ML13028A2022013-02-0404 February 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13030A2462013-01-30030 January 2013 2/12/13 Forthcoming Preapplication Meeting with Pacific Gas and Electric Company to Discuss License Amendment Requests for Degraded Voltage Protection and Control Room Dose Analysis of Record at Diablo Canyon, Units 1 and 2 ML13017A1572013-01-15015 January 2013 Diablo Canyon - January Hearing File Update ML12354A5392012-12-20020 December 2012 1/24/2013 - Notice of Meeting with Pacific Gas and Electric to Discuss Diablo Canyon, Units 1 and 2 License Amendment Request to Revise FSAR Update Related to Delayed Access Offsite Power Circuit to Conform with GDC 17 ML12355A1382012-12-20020 December 2012 1/24/2013 - Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML12348A1082012-12-18018 December 2012 Notice of 1/15/2013 Preapplication Meeting with Pacific Gas and Electric Company to Discuss License Amendment Request to Revise Diesel Generator Surveillance Requirements for Diablo Canyon, Units 1 and 2 ML12338A0762012-12-0404 December 2012 Notice of Forthcoming Preapplication Meeting on 12/18/12 with Pacific Gas and Electric Company to Discuss Leak Before Break Assumptions Used in 10 CFR 50.46 Evaluation for Diablo Canyon, Units 1 and 2 2024-07-01
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24184C0422024-07-0202 July 2024 NRR E-mail Capture - Request for Additional Information Diablo Canyon 50.69 risk-informed Categorization ML24024A2072024-01-24024 January 2024 Inservice Inspection Request for Information IR 05000275/20240152023-10-10010 October 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection (050002752024015 and 050003232024015) ML23249A2782023-09-0606 September 2023 Inservice Inspection Request for Information ML23159A2382023-07-25025 July 2023 Request for Additional Information for the Technical Review of the Application for Renewal of the Diablo Canyon Independent Spent Fuel Storage Installation (Cac/Epid Nos. 001028/L-2022-RNW-0007) ML23159A2372023-07-25025 July 2023 ISFSI Renewal RAI Transmittal Letter Enclosure ML23096A1792023-04-0606 April 2023 NRR E-mail Capture - Request for Additional Information Diablo Canyon Exemption Request Regarding Senior Reactor Operator License Application ML23047A0062023-02-21021 February 2023 Request for Additional Information Alternative Security Measures for Early Warning System (EPID: L-2022-LLA-0029) (Public Version) ML23041A1862023-02-17017 February 2023 Request for Information Regarding Diablo Canyon Power Plant, Units 1 and 2 - December 8, 2022, Public Meeting ML22258A1112022-09-14014 September 2022 2022 Diablo Canyon PIR Request for Information ML22200A2572022-07-19019 July 2022 Notification of In-service Inspection (Inspection Report 05000323/2022004) and Request for Information ML22187A2652022-07-0606 July 2022 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Exemption Request for Part 73 force-on-force Training Due to COVID-19 ML22152A1502022-06-21021 June 2022 Request for Additional Information Regarding License Amendment Request for Technical Specifications and Revised License Conditions for the Permanently Defueled Condition ML22122A1412022-05-0505 May 2022 .02 Doc Request ML22068A2312022-03-17017 March 2022 Notification of NRC Design Bases Assurance Inspection (Team) 05000275/2022011 and 05000323/2022011 and Initial Request for Information ML22061A2192022-03-0202 March 2022 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Changes to Emergency Plan for post-shutdown and Permanently Defueled Condition ML21363A1692021-12-29029 December 2021 Inservice Inspection Request for Information ML22019A0412021-12-29029 December 2021 RFI ML21215A3432021-08-0303 August 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Request to Revise Technical Specification 3.8.1, AC Sources - Operating to Support Diesel Fuel Oil Transfer System Component Planned Maintenance ML21130A3642021-06-21021 June 2021 DC 2021401 Information Request ML21104A3642021-04-14014 April 2021 NRR E-mail Capture - Request for Additional Information - Diablo Canyon Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition ML21062A0642021-03-0202 March 2021 NRR E-mail Capture - Request for Additional Information for Diablo Canyon Generic Letter 2004-02 Submittal (L-2017-LRC-0000) ML20329A0692020-11-23023 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend force-on-force Exercise ML20323A4532020-11-18018 November 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon COVID-19 Exemption Request to Extend Firearms Requalification ML20301A2212020-10-27027 October 2020 Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report 05000275/2021010 and 05000323/2021010) and Request for Information ML20261H4232020-09-17017 September 2020 NRR E-mail Capture - Request for Additional Information: Diablo Canyon Unit 2 Fall 2019 Steam Generator Tube Inspection Report ML20231A2372020-08-17017 August 2020 NRR E-mail Capture - Diablo Canyon Additional Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G EPID: L-2020-LLA-017 ML20230A0732020-08-14014 August 2020 NRR E-mail Capture - Diablo Canyon Request for Additional Information: Exigent License Amendment Request for Application to Provide a New Technical Specification 3.7.5, Auxiliary Feedwater System, Condition G ML20280A5432020-06-0303 June 2020 DC 2020 PIR Request for Information ML20041E6012020-02-10010 February 2020 NRR E-mail Capture - Diablo Canyon Nuclear Power Plant, Units 1 and 2 - Request for Additional Information for Post -Shutdown Decommissioning Activities Report (PSDAR) ML19262G7482019-08-0909 August 2019 Request for Information ML19149A6012019-05-28028 May 2019 NRR E-mail Capture - Request for Additional Information (Supplemental) - License Amendment Request (LAR) to Revise Emergency Plan Response Organization Staffing and Augmentation ML19123A2162019-05-0202 May 2019 NRR E-mail Capture - Diablo Canyon Nuclear Power Plant -Request for Exemption from Operator Written Examination and Operating Test - Request for Additional Information ML19084A2572019-03-21021 March 2019 NRR E-mail Capture - Request for Additional Information - License Amendment Request (LAR) to Revise Emergency Plan Response Organization Staffing and Augmentation ML19043A9452019-02-20020 February 2019 Notification of Inspection (NRC Inspection Report 05000275/2019002, 05000323/2019002 and Request for Information ML17306A9382017-11-0202 November 2017 NRR E-mail Capture - Request for Additional Information - Request for Approval for Application of Full Weld Overlay REP-RHR-SWOL, Diablo Canyon Power Plant, Units 1 and 2 ML17152A3192017-06-0101 June 2017 NRR E-mail Capture - Request for Additional Information (RAI)- Relief Requests NDE-SLH U2, NDE-LSL U2, NDE-LHC U2, NDE-LHM U2, and NDE-ONV U2 (CAC Nos. MF9386 Through MF9390) ML17102B6072017-04-12012 April 2017 NRR E-mail Capture - Request for Additional Information (RAI) - Revised Emergency Action Level Schemes Pursuant to Nuclear Energy Institute (NEI) 99-01, Revision 6 ML16347A0032016-12-0909 December 2016 NRR E-mail Capture - Request for Additional Information (RAI) - Diablo Canyon Power Plant License Amendment Request for Adoption of NEI 94-01 ML16326A3562016-11-21021 November 2016 NRR E-mail Capture - Request for Additional Information - License Amendment Request to Adopt Nuclear Energy Institute (NEI) 94-01, Revision 2-A for Diablo Canyon Power Plant, Units 1 and 2 - CAC Nos. MF7731 and MF7732 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 ML16011A3652016-02-0202 February 2016 Requests for Additional Information for the Review of the Diablo Canyon Power Plant, Units 1 and 2, License Renewal Application - Set 39 (TAC Nos. ME2896 and ME2897) 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 ML15358A0022015-12-23023 December 2015 Request for Additional Information Email (Follow-up Pra), Request to Adopt National Fire Protection Association NFPA 805, Performance-Based Standard for Fire Protection for LWR Generating Plants (2001 Edition) ML15357A3822015-12-23023 December 2015 Request for Additional Information, Round 4 - Amendment Request to Replace Digital Process Protection System for Reactor Protection System and Engineered Safety Features Actuation System Functions ML15295A3732015-11-0505 November 2015 Requests for Additional Information Related to the Diablo Canyon LRA Environmental Review ML15287A1652015-10-23023 October 2015 Requests for Additional Information Related to the Diablo Canyon LRA Environmental Review - SAMA ML15267A7742015-10-0101 October 2015 Request for Additional Information Associated with Near-Term Task Force Recommendation 2.1 Seismic Evaluations ML15217A4812015-09-24024 September 2015 Requests for Additional Information for the Review of the Diablo Canyon Power Plant, Units 1 and 2, License Renewal Application Set-38 TAC Nos. ME2896 and ME2897 ML15238B7742015-08-27027 August 2015 Request for Additional Information Associated with Near-Term Task Force Recommendation 2.1, Seismic Reevaluations 2024-07-02
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MEMORANDUM TO: Mohan Thadani, Acting Chief Plant Licensing Branch IV Division of Operating Reactors and Licensing Office of Nuclear Reactor Regulation FROM: Kamal A. Manoly, Chief Mechanical & Civil Engineering Branch Division of Engineering Office of Nuclear Reactor Regulation
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE DIABLO CANYION POWER PLANT, UNITS 1 AND 2, LICENSE AMENDMENT REQUEST 08-02, REVISION TO TECHNICAL SPECIFICATIONS 3.7.5, AUXILIARY FEEDWATER SYSTEM, AND 3.7.6, CONDENSATE STORAGE TANK AND FIRE WATER STORAGE TANK, (TAC NOS. MD8471 AND MD8472).
The Mechanical and Civil Engineering Branch staff is currently reviewing the request by the Pacific Gas and Electric Company dated April 3, 2008, to amend the license of the Diablo Canyon Power Plant, Units 1 and 2 by revising Technical Specifications 3.7.5 and 3.7.6. The staff has identified additional information, as stated in the enclosed RAI, that is needed to complete the review of this request.
Docket Nos. 50-275 50-323
Enclosure:
As stated CONTACT: M. Hartzman, DE/EMCB (301) 415-2755
MEMORANDUM TO: Mohan Thadani, Acting Chief Plant Licensing Branch IV Division of Operating Reactors and Licensing Office of Nuclear Reactor Regulation FROM: Kamal A. Manoly, Chief Mechanical & Civil Engineering Branch Division of Engineering Office of Nuclear Reactor Regulation
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE DIABLO CANYON POWER PLANT, UNITS 1 AND 2, LICENSE AMENDMENT REQUEST 08-02, REVISION TO TECHNICAL SPECIFICATIONS 3.7.5, AUXILIARY FEEDWATER SYSTEM, AND 3.7.6, CONDENSATE STORAGE TANK AND FIRE WATER STORAGE TANK, (TAC NOS. MD8471 AND MD8472).
The Mechanical and Civil Engineering Branch staff is currently reviewing the request by the Pacific Gas and Electric Company dated April 3, 2008 to amend the license of the Diablo Canyon Power Plant, Units 1 and 2 by revising Technical Specifications 3.7.5 and 3.7.6. The staff has identified additional information, as stated in the enclosed RAI, that is needed to complete the review of this request.
Docket Nos. 50-275 50-323
Enclosure:
As stated CONTACT: M. Hartzman, DE/EMCB (301) 415-2755 Distribution:
EMCB RF AWang OFFICE EMCB:DE EMCB:DE NAME MHartzman KManoly DATE / /2008 / /2008 OFFICIAL RECORD
MECHANICAL AND CIVIL ENGINEERING BRANCH DIVISION OF ENGINEERING OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION DIABLO CANYON POWER PLANT, UNITS 1 AND 2 AUXILIARY FEEDWATER SYSTEM (AFW) AND CONDENSATE STORAGE TANK (CST)
TECHNICAL SPECIFICATION CHANGES The proposed TS changes are based on modifying the CST to ensure an adequate supply of safety related water is available to the AFW system for the limiting condition of operation. The modification consists in the installation of metal plenums at tank mid-height elevation that will increase the volume of safety grade water. Based on the submitted information, the total weight of the plenums is approximately 1350 lb. The center of gravity of these plenums is located approximately 23 feet above the bottom of the CST. The seismic requalification of the CST with the plenums was done under 10 CFR 50.59.
- 1. Provide a description of the seismic analysis of the CST with the attached plenums.
- 2. State whether the tank wall was checked for local and elephant foot buckling, or if not, provide justification for not checking.
- 3. State that the local stresses induced in the tank wall at the location of the attachment of the plenums meet the design allowable loads or stresses of the licensing basis construction code under the applicable loads and loading combinations.
- 4. Provide the minimum calculated stress ratio in the CST resulting from the addition of the plenums.
ENCLOSURE