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| | number = ML14114A697 | | | number = ML14114A697 |
| | issue date = 05/20/2014 | | | issue date = 05/20/2014 |
| | title = Arkansas Nuclear One, Unit 1 - Relaxation of the Schedule Requirements for Order EA-12-049 Issuance of Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design Basis External Events (TAC No. MF0942) | | | title = Relaxation of the Schedule Requirements for Order EA-12-049 Issuance of Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design Basis External Events |
| | author name = Leeds E J | | | author name = Leeds E |
| | author affiliation = NRC/NRR | | | author affiliation = NRC/NRR |
| | addressee name = | | | addressee name = |
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| | docket = 05000313 | | | docket = 05000313 |
| | license number = | | | license number = |
| | contact person = Hughey J D, NRR/DPR, 415-3204 | | | contact person = Hughey J, NRR/DPR, 415-3204 |
| | case reference number = TAC MF0942 | | | case reference number = TAC MF0942 |
| | document type = Letter | | | document type = Letter |
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| =Text= | | =Text= |
| {{#Wiki_filter:Vice President, Operations Arkansas Nuclear One Entergy Operations, Inc. 1448 S.R. 333 Russellville, AR 72802 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 20, 2014 SUBJECT: ARKANSAS NUCLEAR ONE, UNIT 1 -RELAXATION OF THE SCHEDULE REQUIREMENTS FOR ORDER EA-12-049 "ISSUANCE OF ORDER TO MODIFY LICENSES WITH REGARD TO REQUIREMENTS FOR MITIGATION STRATEGIES FOR BEYOND DESIGN BASIS EXTERNAL EVENTS" (TAC NO. MF0942) Dear Sir or Madam: By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12054A735), the U.S. Nuclear Regulatory Commission (NRC) ordered Entergy Operations, Inc. (Entergy, the licensee) to take certain actions at Arkansas Nuclear One, Units 1 (AN0-1) and 2 (AN0-2), assoc1ated with the Fukushima Near-Term Task Force Recommendations. Order EA-12-049 directed that act1ons be taken by licensees to develop and implement strategies to maintain or restore core cooling, reactor coolant system inventory, containment cooling, and spent fuel pool cooling capabilities during beyond design basis external events (BDBEE). Section IV of the order states that licensees proposing to deviate from requirements contained in NRC Order EA-12-049 may request that the Director, Office of Nuclear Reactor Regulation, relax or rescind certain conditions. By letter dated April 7, 2014 (ADAMS Accession No. ML 14098A114), the licensee informed the NRC of its request for a schedule relaxation of the full implementation schedule requirements for AN0-1 as prescribed in Sectron IV.A.2 of NRC Order EA-12-049 Entergy has requested an extension for full impler: 1entation to coincide with the startup of AN0-2 from refueling outage 2R24 currently scheduled for October 2015. The requested relaxation would move the AN0-*1 implementation ciate from February 2015 to October 2015. Entergy's letter dated April 7, 2014, provided a basis and justification for the request for schedule relief. Entergy's letter notes that train-specific modifications during AN0-2 refueling outages are required to implement AN0-1 Diverse and Flexible Coping Strategies (FLEX) to utilize the AN0-2 charging pumps, powered by a portable diesel generator (PDG). Specifically, modifications are required to two AN0-2 electrical load centers that provide power separately to independent, safety-related charging pump trains. The modifications are associated with providing a direct connection to a PDG for each of the two diverse, safety-related AN0-2 load centers. Work on both load centers in a single refueling outage would require that both trains of diverse, safety-related switchgear at AN0-2 be taken out of ser11ice in the same outage. The licensee states that this is typically not done, in order to reduce risk. Therefore. the licensee | | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 20, 2014 Vice President, Operations Arkansas Nuclear One Entergy Operations, Inc. |
| -2 -requested that the AN0-1 compliance date be relaxed to allow the modifications to be implemented in separate AN0-2 refueling outages that are pre-.scheduled for alternating related switchgear train maintenance. The licensee's April 7, 2014, letter also identifies that additional risk would be introduced from the extensive schedule changes that would be required to implement the modifications to both trains of safety-related switchgear in a single AN0-2 refueling outage. Introduction into the scheduling process of the additional safety-related train modifications would require the rescheduling of tests associated with the additional train, including numerous motor operated valve tests. The licensee states that this amount of rescheduling flux introduces the risk of improperly mitigating the comprehensive risk of multiple equipment schedule interactions. In light of the facts presented in the Entergy's April 7, 2014, letter, the NRC staff has determined that the licensee has presented good cause for a relaxation of the order implementation date for AN0-1. The extension would provide additional time to implement modifications to AN0-2 safety-related switchgear in accordance with prudent outage risk reduction practices and achieve AN0-1 compliance with Order EA-12-049. Implementation of these modifications is a significant action intended to enhance the licensee's capability to cope with a BDBEE. Furthermore, the requested extension will support compliance for AN0-1 before December 2016 and coincident with AN0-2. The NRC staff also considered that, following the accident at Fukushima Dai-ichi, the NRC concluded that a sequence of events such as the Fukushima ichi accident is unlikely to occur in the United States, based on the current regulatory requirements and existing plant capabilities. Therefore, the extension time of one additional AN0-2 refueling outage for AN0-1 to achieve full implementation of the requirements of the mitigation strategies order is justified and completion before December 2016 is consistent with the intent of the order. These circumstances lead the NRC staff to approve the relaxation of the order implementation date. Accordingly, based upon the authority granted to the Director, Office of Nuclear Reactor Regulation, the requirement for full order implementation is relaxed for AN0-1 until October 2015.
| | 1448 S.R. 333 Russellville, AR 72802 |
| -3 -If you have any questions, please contact John Hughey, Mitigating Strategies Project Manager, at 301-415-3204, or atjohn.hughey@nrc.gov. Sincerely, Eric J. eeds, Director Office of Nuclear Reactor Regulation Docket No. 50-313 cc: Listserv
| | |
| -3-If you have any questions, please contact John Hughey, Mitigating Strategies Project Manager, at 301-415-3204, or atjohn.hughey@nrc.gov. Docket No. 50-313 cc: Listserv DISTRIBUTION: PUBLIC LPL4-1 R/F RidsNrrDorllp14-1 Resource RidsNrrLASLent Resource Sincerely, IRA/ Eric J. Leeds, Director Office of Nuclear Reactor Regulation RidsRgn4MaiiCenter Resource JHughey,PM NRR/MSD JBowen, NRR/MSD RidsAcrsAcnw_MaiiCTR Resource RidsNrrPMANO Resource ADAMS Accession No ML14114A697 OFFICE NRR/MSD/PM NRR/MSD/LA NRR/MSD/MSPB/BC OE NAME JHughey Slent JBowen RFretz DATE 04/25/14 04/24/14 04/28/14 05/01/14 OFFICE OGC MSD/D NRR/D NAME CHair JDavis Eleeds DATE 05/07/14 05/14/14 05/20/14 OFFICIAL RECORD COPY
| | ==SUBJECT:== |
| }} | | ARKANSAS NUCLEAR ONE, UNIT 1 -RELAXATION OF THE SCHEDULE REQUIREMENTS FOR ORDER EA-12-049 "ISSUANCE OF ORDER TO MODIFY LICENSES WITH REGARD TO REQUIREMENTS FOR MITIGATION STRATEGIES FOR BEYOND DESIGN BASIS EXTERNAL EVENTS" (TAC NO. MF0942) |
| | |
| | ==Dear Sir or Madam:== |
| | |
| | By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12054A735), the U.S. Nuclear Regulatory Commission (NRC) ordered Entergy Operations, Inc. (Entergy, the licensee) to take certain actions at Arkansas Nuclear One, Units 1 (AN0-1) and 2 (AN0-2), assoc1ated with the Fukushima Near-Term Task Force Recommendations. Order EA-12-049 directed that act1ons be taken by licensees to develop and implement strategies to maintain or restore core cooling, reactor coolant system inventory, containment cooling, and spent fuel pool cooling capabilities during beyond design basis external events (BDBEE). |
| | Section IV of the order states that licensees proposing to deviate from requirements contained in NRC Order EA-12-049 may request that the Director, Office of Nuclear Reactor Regulation, relax or rescind certain conditions. By letter dated April 7, 2014 (ADAMS Accession No. ML14098A114), the licensee informed the NRC of its request for a schedule relaxation of the full implementation schedule requirements for AN0-1 as prescribed in Sectron IV.A.2 of NRC Order EA-12-049 Entergy has requested an extension for full impler: 1entation to coincide with the startup of AN0-2 from refueling outage 2R24 currently scheduled for October 2015. The requested relaxation would move the AN0-*1 implementation ciate from February 2015 to October 2015. |
| | Entergy's letter dated April 7, 2014, provided a basis and justification for the request for schedule relief. Entergy's letter notes that train-specific modifications during AN0-2 refueling outages are required to implement AN0-1 Diverse and Flexible Coping Strategies (FLEX) to utilize the AN0-2 charging pumps, powered by a portable diesel generator (PDG). Specifically, modifications are required to two AN0-2 electrical load centers that provide power separately to independent, safety-related charging pump trains. The modifications are associated with providing a direct connection to a PDG for each of the two diverse, safety-related AN0-2 load centers. Work on both load centers in a single refueling outage would require that both trains of diverse, safety-related switchgear at AN0-2 be taken out of ser11ice in the same outage. The licensee states that this is typically not done, in order to reduce risk. Therefore. the licensee |
| | |
| | requested that the AN0-1 compliance date be relaxed to allow the modifications to be implemented in separate AN0-2 refueling outages that are pre-.scheduled for alternating safety-related switchgear train maintenance. |
| | The licensee's April 7, 2014, letter also identifies that additional risk would be introduced from the extensive schedule changes that would be required to implement the modifications to both trains of safety-related switchgear in a single AN0-2 refueling outage. Introduction into the scheduling process of the additional safety-related train modifications would require the rescheduling of tests associated with the additional train, including numerous motor operated valve tests. The licensee states that this amount of rescheduling flux introduces the risk of improperly mitigating the comprehensive risk of multiple equipment schedule interactions. |
| | In light of the facts presented in the Entergy's April 7, 2014, letter, the NRC staff has determined that the licensee has presented good cause for a relaxation of the order implementation date for AN0-1. The extension would provide additional time to implement modifications to AN0-2 safety-related switchgear in accordance with prudent outage risk reduction practices and achieve AN0-1 compliance with Order EA-12-049. Implementation of these modifications is a significant action intended to enhance the licensee's capability to cope with a BDBEE. |
| | Furthermore, the requested extension will support compliance for AN0-1 before December 2016 and coincident with AN0-2. The NRC staff also considered that, following the accident at Fukushima Dai-ichi, the NRC concluded that a sequence of events such as the Fukushima Dai-ichi accident is unlikely to occur in the United States, based on the current regulatory requirements and existing plant capabilities. Therefore, the extension time of one additional AN0-2 refueling outage for AN0-1 to achieve full implementation of the requirements of the mitigation strategies order is justified and completion before December 2016 is consistent with the intent of the order. These circumstances lead the NRC staff to approve the relaxation of the order implementation date. |
| | Accordingly, based upon the authority granted to the Director, Office of Nuclear Reactor Regulation, the requirement for full order implementation is relaxed for AN0-1 until October 2015. |
| | |
| | If you have any questions, please contact John Hughey, Mitigating Strategies Project Manager, at 301-415-3204, or atjohn.hughey@nrc.gov. |
| | Sincerely, |
| | ~~ |
| | Eric J. eeds, Director Office of Nuclear Reactor Regulation Docket No. 50-313 cc: Listserv |
| | |
| | ML14114A697 OFFICE NRR/MSD/PM NRR/MSD/LA NRR/MSD/MSPB/BC OE NAME JHughey Slent JBowen RFretz DATE 04/25/14 04/24/14 04/28/14 05/01/14 OFFICE OGC MSD/D NRR/D NAME CHair JDavis Eleeds DATE 05/07/14 05/14/14 05/20/14}} |
Letter Sequence Approval |
|---|
|
Results
Other: 0CAN011601, Notification of Full Compliance with NRC Order EA-12-049 Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees), 0CAN021302, Units 1 and 2 - Overall Integrated Plan in Response to March 12, 2012, Commission Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049), 0CAN021405, Second Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order EA-12-049), 0CAN021502, Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying License with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees), 0CAN021503, Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool (SFP) Instrumentation (Order Number EA-12-051), 0CAN081402, Third Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees), ML13063A015, ML13241A414, ML13241A415, ML14045A156, ML14140A514, ML15016A433, ML15054A320, ML15236A340
|
MONTHYEAR0CAN021302, Units 1 and 2 - Overall Integrated Plan in Response to March 12, 2012, Commission Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2013-02-28028 February 2013
Units 1 and 2 - Overall Integrated Plan in Response to March 12, 2012, Commission Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
ML13063A0152013-02-28028 February 2013
Overall Integrated Plan in Response to March 12, 2012, Commission Order Modifying License with Regard to Reliable Spent Fuel Pool Instrumentation (Order No. EA-12-051)
Project stage: Other
ML13127A2352013-05-0707 May 2013
Request for Additional Information Email Overall Integrated Plan in Response to the Commission Order Modifying Licenses
Project stage: RAI
ML13156A3132013-06-26026 June 2013
Request for Additional Information, Overall Integrated Plan in Response to 3/12/12 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order EA-12-051)
Project stage: RAI
0CAN071301, Response to Request for Additional Information for Overall Integrated Plan in Response to the Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation2013-07-25025 July 2013
Response to Request for Additional Information for Overall Integrated Plan in Response to the Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation
Project stage: Response to RAI
ML13241A4142013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
ML13241A4152013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
ML13281A5022013-10-29029 October 2013
Interim Staff Evaluation and Request for Additional Information Regarding the Overall Integrated Plan for Implementation of Order EA-12-051, Reliable Spent Fuel Pool Instrumentation
Project stage: RAI
ML14045A1562014-02-20020 February 2014
Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for Arkansas Nuclear One, Units 1 and 2, TAC Nos.: MF0942 and MF0943
Project stage: Other
ML14007A4592014-02-25025 February 2014
Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies)
Project stage: Acceptance Review
0CAN021405, Second Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order EA-12-049)2014-02-27027 February 2014
Second Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order EA-12-049)
Project stage: Other
1CAN041401, Request for Implementation Date Relief in Response to March 12, 2012,Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)2014-04-0808 April 2014
Request for Implementation Date Relief in Response to March 12, 2012,Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)
Project stage: Request
ML14114A6972014-05-20020 May 2014
Relaxation of the Schedule Requirements for Order EA-12-049 Issuance of Order to Modify Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design Basis External Events
Project stage: Approval
ML14140A5142014-05-28028 May 2014
Update Regarding Audit Activities Associated with Order EA-12-049 (Mitigation Strategies)
Project stage: Other
0CAN081402, Third Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)2014-08-28028 August 2014
Third Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)
Project stage: Other
ML15016A4332015-01-16016 January 2015
Commitment Change Notification for NRC Order EA-12-049
Project stage: Other
0CAN021503, Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool (SFP) Instrumentation (Order Number EA-12-051)2015-02-24024 February 2015
Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool (SFP) Instrumentation (Order Number EA-12-051)
Project stage: Other
0CAN021502, Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying License with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)2015-02-24024 February 2015
Fourth Six-Month Status Report in Response to March 12, 2012, Commission Order Modifying License with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)
Project stage: Other
ML15054A3202015-03-0909 March 2015
Plan for the Onsite Audit Regarding Implementation of Mitigating Strategies and Reliable Spent Fuel Pool Instrumentation Related to Orders EA-12-049 and EA-12-051
Project stage: Other
ML15236A3402015-09-0101 September 2015
Report for the Audit Regarding Implementation of Mitigating Strategies and Reliable Spent Fuel Pool Instrumentation Related to Orders EA-12-049 and EA-12-051
Project stage: Other
0CAN011601, Notification of Full Compliance with NRC Order EA-12-049 Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)2016-01-12012 January 2016
Notification of Full Compliance with NRC Order EA-12-049 Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Bdbees)
Project stage: Other
2014-02-27
[Table View] |
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Category:Letter
MONTHYEARML24295A1202024-10-21021 October 2024
Relief Request ANO2-RR-24-001, Half-Nozzle Repair of Reactor Vessel Closure Head Penetration 71
ML24185A2602024-10-0404 October 2024
Issuance of Amendment No. 335 to Revise Typographical Errors in Technical Specifications
IR 05000368/20253012024-09-0909 September 2024
Notification of NRC Initial Operator Licensing Examination 05000368/2025301
ML24255A8642024-09-0606 September 2024
Rscc Wire & Cable LLC Dba Marmon Industrial Energy & Infrastructure - Part 21 Retraction of Final Notification
IR 05000313/20240112024-09-0505 September 2024
Comprehensive Engineering Team Inspection Report 05000313/2024011 and 05000368/2024011
IR 05000313/20244042024-08-29029 August 2024
Cybersecurity Inspection Report 05000313/2024404 and 05000368/2024404
ML24239A3972024-08-23023 August 2024
Rssc Wire & Cable LLC Dba Marmon - Part 21 Final Notification - 57243-EN 57243
IR 05000313/20240052024-08-21021 August 2024
Updated Inspection Plan for Arkansas Nuclear One – Units 1 and 2 (Report 05000313/2024005, 05000368/2024005)
ML24198A0722024-08-21021 August 2024
Correction to Issuance of Amendment No. 333 Revision to Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b
ML24220A2642024-08-20020 August 2024
Entergy Operations, Inc. - Entergy Fleet Project Manager Assignment
ML24185A1522024-08-13013 August 2024
Issuance of Amendment Nos. 334, 235, and 215, Respectively, to Revise TSs to Adopt TSTF-205
IR 05000313/20240022024-08-0606 August 2024
Integrated Inspection Report 05000313/2024002 and 05000368/2024002
ML24208A0962024-07-25025 July 2024
57243-EN 57243 - Rssc Wire & Cable LLC, Dba Marmon - Part 21 Notification
05000313/LER-2024-001, Source Range Nuclear Instrument Failure Resulting in Condition Prohibited by Technical Specifications2024-07-0101 July 2024
Source Range Nuclear Instrument Failure Resulting in Condition Prohibited by Technical Specifications
ML24101A1792024-06-25025 June 2024
Issuance of Amendment No. 333 Revision to Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b
ML24143A0632024-05-22022 May 2024
Notification of Inspection (NRC Inspection Report 05000368/2024003) and Request for Information
IR 05000313/20240012024-05-0808 May 2024
Integrated Inspection Report 05000313/2024001 and 05000368/2024001
ML24128A2472024-05-0808 May 2024
Project Manager Assignment
ML24017A2982024-04-18018 April 2024
Summary of Regulatory Audit Regarding the License Amendment Request to Revise Technical Specifications to Adopt TSTF 505, Revision 2, Provide Risk-Informed Extended Completion Times RITSTF Initiative 4b
ML24107A0282024-04-17017 April 2024
Notification of Comprehensive Engineering Team Inspection (05000313/2024011 and 05000368/2024011) and Request for Information
IR 05000313/20243012024-04-16016 April 2024
NRC Examination Report 05000313/2024301
ML24086A5412024-04-10010 April 2024
Authorization of Request for Alternative ANO1-ISI-037 Regarding Extension of Reactor Vessel Inservice Inspection Interval
IR 05000313/20244022024-04-0808 April 2024
Security Baseline Inspection Report 05000313/2024402 and 05000368/2024402 (Full Report)
ML24099A1912024-04-0808 April 2024
Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection (05000313/2024404 and 05000368/2024404)
ML24089A2262024-03-29029 March 2024
Entergy Response to Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Exams
ML24075A1712024-03-15015 March 2024
Nuclear Onsite Property Damage Insurance (10 CFR 50.54(w)(3))
ML24031A6442024-03-14014 March 2024
Issuance of Amendment No. 282 to Modify Technical Specification 3.3.1, Reactor Pressure System (RPS) Instrumentation, Turbine Trip Function on Low Control Oil Pressure
ML24074A2892024-03-14014 March 2024
Proof of Financial Protection (10 CFR 140.15)
ML24102A1342024-03-12012 March 2024
AN1-2024-03 Post Exam Submittal
IR 05000313/20230062024-02-28028 February 2024
Annual Assessment Letter for Arkansas Nuclear One- Units 1 and 2 Report 05000313/2023006 and 05000368/2023006
IR 05000313/20230042024-02-0808 February 2024
Integrated Inspection Report 05000313/2023004 and 05000368/2023004 and Independent Spent Fuel Storage Installation Inspection Report 07200013/2023002
ML24012A0502024-02-0202 February 2024
Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0054 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting))
ML23326A0392024-01-24024 January 2024
Issuance of Amendment No. 281 Revision to Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b
ML24017A1582024-01-17017 January 2024
Submittal of Emergency Plan Revision 50
IR 05000313/20234202024-01-10010 January 2024
Security Baseline Inspection Report 05000313/2023420 and 05000368/2023420
IR 05000313/20234022024-01-0202 January 2024
Security Baseline Inspection Report 05000313/2023402 and 05000368/2023402
ML23354A0022023-12-21021 December 2023
Request for Withholding Information from Public Disclosure
ML23349A1672023-12-21021 December 2023
Request for Withholding Information from Public Disclosure
ML23348A3572023-12-14014 December 2023
Application to Revise Technical Specifications to Use Online Monitoring Methodology – Slides and Affidavit for Pre-Submittal Meeting
ML23340A1592023-12-13013 December 2023
Entergy Operations, Inc. - Entergy Fleet Project Manager Assignment
ML23352A0292023-12-13013 December 2023
Entergy - 2024 Nuclear Energy Liability Evidence of Financial Protection
IR 05000313/20234052023-12-12012 December 2023
– Security Baseline Inspection Report 05000313/2023405 and 05000368/2023405
ML23341A0832023-12-11011 December 2023
– Material Control and Accounting Program Inspection Report 05000313/368/2023404- Cover Letter
ML23305A0922023-12-0707 December 2023
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ML23333A1362023-11-29029 November 2023
Supplement to Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
ML23275A2072023-11-28028 November 2023
Issuance of Amendment No. 280 Removal of Technical Specification Condition Allowing Two Reactor Coolant Pump Operation
IR 05000313/20230032023-11-21021 November 2023
Revised - ANO Revised Integrated Inspection Report 05000313/2023003 and 05000368/2023003 and Independent Spent Fuel Storage Installation Inspection Report 07200013/ 2023001
ML23325A1412023-11-21021 November 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
ML23243B0452023-11-13013 November 2023
Request for Withholding Information from Public Disclosure
ML23313A0962023-11-13013 November 2023
Integrated Inspection Report 05000313/2023003 and 05000368/2023003 and Independent Spent Fuel Storage Installation Inspection Report 07200013/2023001
2024-09-09
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 20, 2014 Vice President, Operations Arkansas Nuclear One Entergy Operations, Inc.
1448 S.R. 333 Russellville, AR 72802
SUBJECT:
ARKANSAS NUCLEAR ONE, UNIT 1 -RELAXATION OF THE SCHEDULE REQUIREMENTS FOR ORDER EA-12-049 "ISSUANCE OF ORDER TO MODIFY LICENSES WITH REGARD TO REQUIREMENTS FOR MITIGATION STRATEGIES FOR BEYOND DESIGN BASIS EXTERNAL EVENTS" (TAC NO. MF0942)
Dear Sir or Madam:
By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12054A735), the U.S. Nuclear Regulatory Commission (NRC) ordered Entergy Operations, Inc. (Entergy, the licensee) to take certain actions at Arkansas Nuclear One, Units 1 (AN0-1) and 2 (AN0-2), assoc1ated with the Fukushima Near-Term Task Force Recommendations. Order EA-12-049 directed that act1ons be taken by licensees to develop and implement strategies to maintain or restore core cooling, reactor coolant system inventory, containment cooling, and spent fuel pool cooling capabilities during beyond design basis external events (BDBEE).
Section IV of the order states that licensees proposing to deviate from requirements contained in NRC Order EA-12-049 may request that the Director, Office of Nuclear Reactor Regulation, relax or rescind certain conditions. By letter dated April 7, 2014 (ADAMS Accession No. ML14098A114), the licensee informed the NRC of its request for a schedule relaxation of the full implementation schedule requirements for AN0-1 as prescribed in Sectron IV.A.2 of NRC Order EA-12-049 Entergy has requested an extension for full impler: 1entation to coincide with the startup of AN0-2 from refueling outage 2R24 currently scheduled for October 2015. The requested relaxation would move the AN0-*1 implementation ciate from February 2015 to October 2015.
Entergy's letter dated April 7, 2014, provided a basis and justification for the request for schedule relief. Entergy's letter notes that train-specific modifications during AN0-2 refueling outages are required to implement AN0-1 Diverse and Flexible Coping Strategies (FLEX) to utilize the AN0-2 charging pumps, powered by a portable diesel generator (PDG). Specifically, modifications are required to two AN0-2 electrical load centers that provide power separately to independent, safety-related charging pump trains. The modifications are associated with providing a direct connection to a PDG for each of the two diverse, safety-related AN0-2 load centers. Work on both load centers in a single refueling outage would require that both trains of diverse, safety-related switchgear at AN0-2 be taken out of ser11ice in the same outage. The licensee states that this is typically not done, in order to reduce risk. Therefore. the licensee
requested that the AN0-1 compliance date be relaxed to allow the modifications to be implemented in separate AN0-2 refueling outages that are pre-.scheduled for alternating safety-related switchgear train maintenance.
The licensee's April 7, 2014, letter also identifies that additional risk would be introduced from the extensive schedule changes that would be required to implement the modifications to both trains of safety-related switchgear in a single AN0-2 refueling outage. Introduction into the scheduling process of the additional safety-related train modifications would require the rescheduling of tests associated with the additional train, including numerous motor operated valve tests. The licensee states that this amount of rescheduling flux introduces the risk of improperly mitigating the comprehensive risk of multiple equipment schedule interactions.
In light of the facts presented in the Entergy's April 7, 2014, letter, the NRC staff has determined that the licensee has presented good cause for a relaxation of the order implementation date for AN0-1. The extension would provide additional time to implement modifications to AN0-2 safety-related switchgear in accordance with prudent outage risk reduction practices and achieve AN0-1 compliance with Order EA-12-049. Implementation of these modifications is a significant action intended to enhance the licensee's capability to cope with a BDBEE.
Furthermore, the requested extension will support compliance for AN0-1 before December 2016 and coincident with AN0-2. The NRC staff also considered that, following the accident at Fukushima Dai-ichi, the NRC concluded that a sequence of events such as the Fukushima Dai-ichi accident is unlikely to occur in the United States, based on the current regulatory requirements and existing plant capabilities. Therefore, the extension time of one additional AN0-2 refueling outage for AN0-1 to achieve full implementation of the requirements of the mitigation strategies order is justified and completion before December 2016 is consistent with the intent of the order. These circumstances lead the NRC staff to approve the relaxation of the order implementation date.
Accordingly, based upon the authority granted to the Director, Office of Nuclear Reactor Regulation, the requirement for full order implementation is relaxed for AN0-1 until October 2015.
If you have any questions, please contact John Hughey, Mitigating Strategies Project Manager, at 301-415-3204, or atjohn.hughey@nrc.gov.
Sincerely,
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Eric J. eeds, Director Office of Nuclear Reactor Regulation Docket No. 50-313 cc: Listserv
ML14114A697 OFFICE NRR/MSD/PM NRR/MSD/LA NRR/MSD/MSPB/BC OE NAME JHughey Slent JBowen RFretz DATE 04/25/14 04/24/14 04/28/14 05/01/14 OFFICE OGC MSD/D NRR/D NAME CHair JDavis Eleeds DATE 05/07/14 05/14/14 05/20/14
