Letter Sequence Request |
---|
|
|
MONTHYEARML0812206902008-05-0707 May 2008 GL-2008-01, Managing Gas Accumulation in ECC Decay Heat Removal and Containment Spray Systems Response to Extension Request Project stage: Other NG-08-0239, Three Month Response to NRC Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems2008-05-0808 May 2008 Three Month Response to NRC Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: Request ML0819302092008-08-0606 August 2008 Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, Proposed Alternative Course of Action Project stage: Other NG-08-0777, Nine-Month Response to NRC Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems2008-10-13013 October 2008 Nine-Month Response to NRC Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: Request NG-09-0327, Nine-Month Supplemental (Post-Outage) Response to NRC Generic Letter 2008-012009-04-27027 April 2009 Nine-Month Supplemental (Post-Outage) Response to NRC Generic Letter 2008-01 Project stage: Request ML0923003792009-08-13013 August 2009 Draft RAI, Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems. Project stage: Draft RAI ML0922603112009-08-13013 August 2009 MD7824 - GL 2008-01 (Managing Gas Accumulation) - Request for Additional Information Project stage: RAI ML0923201162009-08-28028 August 2009 Request for Additional Information Regarding Your Nine Month Response to NRC Generic Letter 2009-01. Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: RAI NG-09-0774, Response to Request for Additional Information Regarding NextEra Energy Duane Arnold'S Nine Month Response to Generic Letter 2008-012009-10-16016 October 2009 Response to Request for Additional Information Regarding NextEra Energy Duane Arnold'S Nine Month Response to Generic Letter 2008-01 Project stage: Response to RAI ML0934310852009-12-16016 December 2009 Closeout of Generic Letter 2008-01 Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: Other 2009-10-16
[Table View] |
|
---|
Category:Letter type:NG
MONTHYEARNG-23-0010, Supplement to Duane Arnold Exemption Request Regarding Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Final Rule2023-12-0606 December 2023 Supplement to Duane Arnold Exemption Request Regarding Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Final Rule NG-23-0009, Part 73 Exemption Request Regarding Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Final Rule2023-11-16016 November 2023 Part 73 Exemption Request Regarding Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Final Rule NG-23-0006, Independent Spent Fuel Storage Installation (ISFSI) Financial Assurance Update2023-05-23023 May 2023 Independent Spent Fuel Storage Installation (ISFSI) Financial Assurance Update NG-23-0004, 2022 Annual Radioactive Material Release Report2023-04-25025 April 2023 2022 Annual Radioactive Material Release Report NG-23-0003, 2022 Annual Exposure Report - Form 5s2023-04-21021 April 2023 2022 Annual Exposure Report - Form 5s NG-23-0002, 10 CFR 50.59 Report, Commitment Changes, 10 CFR 72.48 Report, Quality Assurance Program Changes, Technical Specification Basis Changes, and Revision of the DAEC Defueled Safety Analysis Report2023-03-27027 March 2023 10 CFR 50.59 Report, Commitment Changes, 10 CFR 72.48 Report, Quality Assurance Program Changes, Technical Specification Basis Changes, and Revision of the DAEC Defueled Safety Analysis Report NG-23-0001, 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report2023-03-27027 March 2023 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report NG-22-0055, Revision to Duane Arnold Energy Center (DAEC) ISFSI-Only Emergency Plan2022-05-20020 May 2022 Revision to Duane Arnold Energy Center (DAEC) ISFSI-Only Emergency Plan NG-22-0053, 2021 Annual Radiological Environmental Operating Report2022-05-0606 May 2022 2021 Annual Radiological Environmental Operating Report NG-22-0052, Regulatory Issue Summary 2000-11. NRC Emergency Telecommunications System, Statement of Intent to Implement the Proposed Voluntary Initiative2022-05-0404 May 2022 Regulatory Issue Summary 2000-11. NRC Emergency Telecommunications System, Statement of Intent to Implement the Proposed Voluntary Initiative NG-22-0050, Revised Response to Request for Additional Information Relating to Decommissioning Quality Assurance Program, Revision 02022-04-26026 April 2022 Revised Response to Request for Additional Information Relating to Decommissioning Quality Assurance Program, Revision 0 NG-22-0049, 2021 Annual Radioactive Material Release Report2022-04-26026 April 2022 2021 Annual Radioactive Material Release Report NG-22-0035, Response to Request for Additional Information Relating to Decommissioning Quality Assurance Program. Revision 02022-04-13013 April 2022 Response to Request for Additional Information Relating to Decommissioning Quality Assurance Program. Revision 0 NG-22-0047, Registration of Independent Spent Fuel Installation Storage Cask and Notification of Permanent Removal of All Spent Fuel Assemblies from the Spent Fuel Pool2022-04-11011 April 2022 Registration of Independent Spent Fuel Installation Storage Cask and Notification of Permanent Removal of All Spent Fuel Assemblies from the Spent Fuel Pool NG-22-0042, Registration of Independent Spent Fuel Installation Storage Casks2022-04-0808 April 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0041, and Independent Spent Fuel Storage Installation, 2022 Annual Decommissioning and Spent Fuel Management Funding Status Report2022-03-31031 March 2022 and Independent Spent Fuel Storage Installation, 2022 Annual Decommissioning and Spent Fuel Management Funding Status Report NG-22-0031, 2021 Annual Exposure Report - Form 5s2022-03-23023 March 2022 2021 Annual Exposure Report - Form 5s NG-22-0030, Registration of Independent Spent Fuel Installation Storage Casks2022-03-23023 March 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0025, Registration of Independent Spent Fuel Installation Storage Casks2022-03-0808 March 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0021, Registration of Independent Spent Fuel Installation Storage Casks2022-02-24024 February 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0014, Registration of Independent Spent Fuel Installation Storage Casks2022-02-10010 February 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0009, Registration of Independent Spent Fuel Installation Storage Casks2022-01-20020 January 2022 Registration of Independent Spent Fuel Installation Storage Casks NG-22-0001, Supplement to Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61BTH Type 2 Dry Shielded Canister2022-01-0606 January 2022 Supplement to Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61BTH Type 2 Dry Shielded Canister NG-21-0038, Registration of Independent Spent Fuel Installation Storage Casks2021-12-22022 December 2021 Registration of Independent Spent Fuel Installation Storage Casks NG-21-0035, Supplement to Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61 Bth Type 2 Dry Shielded Canister2021-12-10010 December 2021 Supplement to Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61 Bth Type 2 Dry Shielded Canister NG-21-0030, Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61 Bth Type 2 Dry Shielded Canister2021-10-21021 October 2021 Exemption Request for Failed Fuel Can Weight in a Certificate of Compliance 1004 Renewed Amendment 17 61 Bth Type 2 Dry Shielded Canister NG-21-0028, Request for Approval of NextEra Energy Duane Arnold, Llc'S Decommissioning Quality Assurance Program Revision 02021-07-30030 July 2021 Request for Approval of NextEra Energy Duane Arnold, Llc'S Decommissioning Quality Assurance Program Revision 0 NG-21-0010, License Amendment Request (TSCR-192): Independent Spent Fuel Storage Installation (ISFSI) Emergency Plan and Emergency Action Level Scheme2021-06-28028 June 2021 License Amendment Request (TSCR-192): Independent Spent Fuel Storage Installation (ISFSI) Emergency Plan and Emergency Action Level Scheme NG-21-0026, CFR 72.48 Report of Changes. Tests. and Experiments2021-06-16016 June 2021 CFR 72.48 Report of Changes. Tests. and Experiments NG-21-0011, Submittal of 2020 Annual Radiological Environmental Operating Report2021-05-0404 May 2021 Submittal of 2020 Annual Radiological Environmental Operating Report NG-21-0009, Report of Facility Changes. Tests and Experiments. and Commitment Changes2021-04-27027 April 2021 Report of Facility Changes. Tests and Experiments. and Commitment Changes NG-21-0021, Supplement to License Amendment Request (TSCR-185): Application to Revise Operating License to Remove Cyber Security Plan Requirements2021-04-22022 April 2021 Supplement to License Amendment Request (TSCR-185): Application to Revise Operating License to Remove Cyber Security Plan Requirements NG-21-0006, 2021 Annual Decommissioning and Spent Fuel Management Funding Status Report2021-03-31031 March 2021 2021 Annual Decommissioning and Spent Fuel Management Funding Status Report NG-21-0005, NextEra Energy Duane Arnold, LLC - Transmittal of the DAEC Defueled Safety Analysis Report Revision 02021-03-29029 March 2021 NextEra Energy Duane Arnold, LLC - Transmittal of the DAEC Defueled Safety Analysis Report Revision 0 NG-20-0094, License Amendment Request (TSCR-189): Revision to Facility License and Technical Specifications to Reflect Permanent Removal of Spent Fuel from the Spent Fuel Pool2021-02-19019 February 2021 License Amendment Request (TSCR-189): Revision to Facility License and Technical Specifications to Reflect Permanent Removal of Spent Fuel from the Spent Fuel Pool NG-21-0004, Response to Request for Additional Information Related to Post Shutdown Decommissioning Activities Report2021-02-0505 February 2021 Response to Request for Additional Information Related to Post Shutdown Decommissioning Activities Report NG-20-0078, Update to Spent Fuel Management Plan Pursuant to 10 CFR 50.54(bb)2021-01-13013 January 2021 Update to Spent Fuel Management Plan Pursuant to 10 CFR 50.54(bb) NG-20-0101, Request for a One-Time Exemption from 10 CFR 73, Appendix B, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to COVID-19 Pandemic2020-12-29029 December 2020 Request for a One-Time Exemption from 10 CFR 73, Appendix B, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to COVID-19 Pandemic NG-20-0099, Response to Request for Additional Information Relating to License Amendment Request (TSCR-187): Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme2020-12-0101 December 2020 Response to Request for Additional Information Relating to License Amendment Request (TSCR-187): Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme NG-20-0093, Supplement to License Amendment Request (TSCR-187): Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme2020-10-29029 October 2020 Supplement to License Amendment Request (TSCR-187): Proposed Permanently Defueled Emergency Plan and Permanently Defueled Emergency Action Level Scheme NG-20-0090, Certification of Permanent Removal of Fuel from the Reactor Vessel for Duane Arnold Energy Center2020-10-12012 October 2020 Certification of Permanent Removal of Fuel from the Reactor Vessel for Duane Arnold Energy Center NG-20-0083, Registration of Independent Spent Fuel Installation Storage Casks2020-10-12012 October 2020 Registration of Independent Spent Fuel Installation Storage Casks NG-20-0069, Response to Request for Additional Information Relating to Request for Exemption from Portions of 10 CFR 50.47 and 10 CFR 50, Appendix E2020-10-0707 October 2020 Response to Request for Additional Information Relating to Request for Exemption from Portions of 10 CFR 50.47 and 10 CFR 50, Appendix E NG-20-0082, Registration of Independent Spent Fuel Installation Storage Casks2020-09-28028 September 2020 Registration of Independent Spent Fuel Installation Storage Casks NG-20-0071, Request for One-Time Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Evaluated Exercise Requirements Due to COVID-19 Pandemic2020-09-22022 September 2020 Request for One-Time Exemption from 10 CFR 50, Appendix E, Biennial Emergency Preparedness Evaluated Exercise Requirements Due to COVID-19 Pandemic NG-20-0077, Registration of Independent Spent Fuel Installation Storage Casks2020-09-10010 September 2020 Registration of Independent Spent Fuel Installation Storage Casks NG-20-0073, Notice Regarding Proposed Amendment to Decommissioning Trust Agreements2020-09-0101 September 2020 Notice Regarding Proposed Amendment to Decommissioning Trust Agreements NG-20-0074, Certification of Permanent Cessation of Power Operations2020-08-27027 August 2020 Certification of Permanent Cessation of Power Operations NG-20-0067, Registration of Independent Spent Fuel Installation Storage Casks2020-08-12012 August 2020 Registration of Independent Spent Fuel Installation Storage Casks NG-20-0035, Request for Exemption from 10 CFR 50.54(w)(1)2020-07-16016 July 2020 Request for Exemption from 10 CFR 50.54(w)(1) 2023-05-23
[Table view] |
Text
NExTeraM ENER GY ARNOLD April 27, 2009 NG-09-0327 10 CFR 50.54(f)U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington DC, 20555-001 Duane Arnold Energy Center Docket No. 50-331 License No. DPR-49
Subject:
Nine-Month Supplemental (Post-Outage)
Response to NRC Generic Letter 2008-01
References:
- 1. NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems" dated January 11, 2008.2. Letteiri,:
i.An derson (F'PL Energy Duane Arnold) to USNRC, "Three-Month Response to NRC Geneic Letter 2008'-01, 'Managihg Gas Accumulation jn.Emergency Core Cooling, Decay Heat Removal, and Containment'Spray Systems'," NG-08-0239, dated May 8, 2008.(ADAMS Accession No. ML081420015)
- 3. Letterý, R. Anderson (FPL Energy Duane Arnold) to USNRC, "Nine-Response to NRC Generic Letter 2008-01, 'Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems'," NG-08-0777, dated October 13, 2008.(ADAMS Accession No. ML082970263)
- 4. Letter, K. Feintuch (USNRC) to R. Anderson (FPL Energy Duane Arnold), "Duane Arnold Energy Center -re: Generic Letter 2008-01,'Managing Gas Accumulation In Emergency Core Cooling, Decay-eat ?emoval, And Containment Spray Systems,'
Proposed AlternauveCourse Of Action (TAC NO. MD7824)," dated August 6, 2008. (ADAMS -Accession No. ML081930209)
.5. NRC'Letter'to Nuc ear.Energy Institute, Dated July 8, 2008(ADAMS Acce'ssn No. ML0818305557)'
Acce S 0nNo. ....' "-- ,,,' i-J-K,44s NextEra Energy Duane Arnold, LLC, 3277 DlAEC Read, Palo, IA 52324 NG-09-0327 April 27, 2009 Page 2 of 3 The Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2008-01 (Reference 1)to request that each licensee evaluate the licensing basis, design, testing, and corrective actions for the emergency core cooling (ECCS), decay heat removal (DHR), and containment spray systems to ensure that gas accumulation is maintained less than the amount that challenges operability of these systems, and that appropriate action is taken when conditions adverse to quality are identified.
As requested in Reference 4, please find enclosed NextEraTM Energy Duane Arnold, LLC's, f/k/a FPL Energy Duane Arnold, LLC (hereafter, NextEra Energy Duane Arnold) supplemental response to the nine month response letter (Reference 3). This supplemental response is being submitted within 90 days of startup from the outage in which the deferred actions were completed.
GL response activities that remain to be accomplished, such as the long-term items identified in Reference 4, are considered to be confirmatory.
In summary, NextEra Energy Duane Arnold has concluded that the subject systems at Duane Arnold are operable and that Duane Arnold is currently in compliance with the licensing basis documentation and applicable regulations, including 10 CFR 50 Appendix B, Criteria Ill, V, XI, XVI, and XVII, with respect to the concerns outlined in GL 2008-01 regarding managing gas accumulation in these systems/functions.
This letter contains no new or revised NRC commitments.
This letter closes the following NRC commitments made in Reference 2: 1. Complete the detailed walkdowns and evaluations of those inaccessible sections of piping of GL subject systems, not otherwise exempted, prior to startup from the next Refuel Outage (currently scheduled for early 2009).2. Submit a supplemental report to the original nine (9) month response, for those walkdowns and evaluations completed during the 2009 Refuel Outage, within 90 days after startup from that outage.Please contact Steve Catron at (319) 851-7234 if you have further questions regarding this matter.I declare under penalty of perjury that the foregoing is true and correct.Executed on April 27, 2009.Richard L. Anderso Vice President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC Enclosure NG-09-0327 April 27, 2009 Page 3 of 3 cc: Administrator, Region I11, USNRC Project Manager, DAEC, USNRC Resident Inspector, DAEC, USNRC Enclosure to NG-09-0327 Page 1 of 3 NextEra Energy Duane Arnold Nine-Month Supplemental (Post-Outage)
Response to NRC Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems This Enclosure provides the Nine-Month Supplemental (Post Outage) Response to Generic Letter 2008-01 for actions that were deferred until the next refueling outage as requested by the NRC in Reference 4 of the cover letter.The following information is provided in this
Enclosure:
A description of the results of evaluations that were performed pursuant to Generic Letter 2008-01 on the previously incomplete activities, such as system piping walkdowns, at the Duane Arnold Energy Center (DAEC) (see Section A of this Enclosure), A description of any additional corrective actions determined necessary to assure system Operability and compliance with the quality assurance criteria in Sections III, V, Xl, XVI, and XVII of Appendix B to 10 CFR Part 50 and the licensing basis and operating license with respect to the subject systems, including a schedule and a basis for that schedule (see Section B1 of this Enclosure), and summary of any changes or updates to previous corrective actions, including any schedule change and the basis for the change. (See Section B2 of this Enclosure).
The original conclusions documented in the 9 month response with respect to the licensing basis evaluation, testing evaluations, and corrective action evaluations have not changed. This supplement will only discuss the results of design evaluation reviews conducted during the recent refueling outage associated with walkdowns of previously uncompleted activities.
Enclosure to NG-09-0327 Page 2 of 3 A. EVALUATION RESULTS 1. Design Basis Documents There have been no changes in the DAEC design basis documentation related to gas accumulation since the 9-month response (Reference 3 of the cover letter). Plant drawings have been updated to reflect the addition of the new vent line and valves discussed below.2. Confirmatory Walkdowns As noted in Reference 2 of the cover letter, walkdowns of piping systems in a number of inaccessible areas of the plant were deferred until this recent refuel outage (RFO21). In addition, one section of Core Spray discharge piping was determined to be inaccessible during the on-line walkdowns performed for the 9-month response letter (Reference 3 of the cover letter).All of the inaccessible piping walkdowns were completed during RFO21. All inaccessible piping system segments conformed to the design information; in particular, the location of high point vents. Piping slopes were measured by combinations of laser scanning of insulated piping and inclinometer (bubble level) on un-insulated pipe.As described in the 9-month response (Reference 3 of the cover letter), none of these inaccessible piping segments were believed to contain locations that would accumulate voids that could challenge the system's safety/design functions, provided the piping was found in accordance with the plant's design documents.
The walkdowns did confirm that all piping slopes and vent locations were in accordance with the piping design documents.
Notwithstanding, one confirmatory ultrasonic (UT) examination of a single piping elbow was performed, as the piping was found to have a slight (<1 degree) upslope at this location.
No void was found at this piping location.3. Vent Valves As discussed in the 9-month response (Reference 3 of the cover letter), NextEra Energy Duane Arnold was evaluating the prudence of installing a new vent line and valves in the abandoned Residual Heat Removal (RHR) steam-condensing mode pipe leg. It was subsequently decided to install this new vent, in lieu of removing this piping. The vent installation has been completed.
Post-modification UT examination confirmed no voiding in this pipe segment.4. Procedures As discussed in the 9-month response (Reference 3 of the cover letter), NextEra Energy Duane Arnold was evaluating enhancements to the existing procedure steps utilized for filling and venting as part of restoring the subject systems/functions after maintenance or testing, such as dynamic venting and confirmatory UT exams at designated high points.Those changes have been implemented.
B. DESCRIPTION OF NECESSARY ADDITIONAL CORRECTIVE ACTIONS 1. Additional Corrective Actions No new corrective actions were identified as a result of the walkdowns performed during RFO21.
Enclosure to NG-09-0327 Page 3 of 3 2. Corrective Action Updates All previously-identified corrective action documents associated with this GL having due dates prior to startup from RFO21 have been completed.
Only one outstanding corrective action remains -the commitment to submit the final Technical Specification changes within 180 days following issuance of the Federal Register Notice for adoption of the Technical Specification Task Force traveler.
No changes in the schedule for closing this commitment have been made.Conclusion NextEra Energy Duane Arnold has completed the evaluation of the previously inaccessible portions of the applicable systems/functions at DAEC that perform the functions described in the GL and has concluded that these systems are Operable, as defined in the DAEC TS, and are in conformance with the DAEC licensing basis and compliance with all applicable regulations, including 10 CFR 50 Appendix B, Criteria IlI, V, XI, XVI, and XVII.