NG-14-0285, NextEra Energy Duane Arnold, Llc'S Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Num

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NextEra Energy Duane Arnold, Llc'S Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Numbe
ML14349A324
Person / Time
Site: Duane Arnold NextEra Energy icon.png
Issue date: 12/10/2014
From: Vehec T
NextEra Energy Duane Arnold
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
EA-13-109, NG-14-0285
Download: ML14349A324 (7)


Text

NEXTera ENERAN December 10, 2014 N-48ARNOLD NG-1 4-0285 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Duane Arnold Energy Center Docket No. 50-331 Renewed Facility Operating License No. DPR-49 NextEra Energy Duane Arnold, LLC's Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109

References:

1. Order EA-1 3-109, "Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," dated June 6, 2013 (ML13130A067)
2. NRC Interim Staff Guidance JLD-ISG-2013-02, "Compliance with Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," dated November 14, 2013 (ML13304B836)
3. NRC Endorsement of Industry "Hardened Containment Venting (HCVS) Phase 1 Overall Integrated Plan Template (EA-13-109) Rev 0," (ML14128A219)
4. NEI 13-02, "Industry Guidance for Compliance with Order EA 109, Revision 0," dated November 2013
5. NextEra Energy Duane Arnold LLC's Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Re-gard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109, dated June 25, 2014 (ML14182A423)

On June 6, 2013, the Nuclear Regulatory Commission ("NRC" or "Commission") issued an order (Reference 1) to NextEra Energy Duane Arnold, LLC. Reference 1 was immediately effective and directs NextEra Energy Duane Arnold, LLC (hereafter NextEra Energy Duane Arnold) to install a reliable hardened venting capability for pre-core damage and under severe accident conditions, including those involving a breach of the reactor vessel by molten core debris. Specific requirements are outlined in

/ý ýC5ýý Attachment 2 of Reference 1.

NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Palo, IA52324

Document Control Desk NG-14-0285 Page 2 of 2 Reference 1 required submission of a phase 1 overall integrated plan pursuant to Section IV, Condition D. Reference 2 endorses industry guidance document NEI 13-02, Revision 0 (Reference 4) with clarifications and exceptions identified in Reference 2.

Reference 5 provided the NextEra Energy Duane Arnold LLC overall integrated plan.

Reference 1 requires submission of a status report at six-month intervals following submittal of the overall integrated plan. Reference 2 (and 4) provides direction regarding the content of the status reports. The purpose of this letter is to provide the first six-month status report pursuant to Section IV, Condition D, of Reference 1, that delineates progress made in implementing the requirements of Reference 1. The enclosed report provides an update of milestone accomplishments since the last status report, including any changes to the compliance method, schedule, or need for relief and the basis, if any.

This letter contains no new regulatory commitments. If you have any questions regarding this report, please contact Ken Putnam at 319-851-7238.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on December 10, 2014.

T. A. Vehec Vice President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC Enclosure cc: Director, Office of Nuclear Reactor Regulation USNRC Regional Administrator Region III USNRC Project Manager, Duane Arnold Energy Center USNRC Resident Inspector, Duane Arnold Energy Center

Enclosure to NG-14-0285 NextEra Energy Duane Arnold, LLC's Six-Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109) 3 pages follow

NextEra Energy Duane Arnold LLC's Six Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number 13-109)

Introduction NextEra Duane Arnold Energy Center, LLC developed an Overall Integrated Plan (Reference 1 on page 3), documenting the planned installation of a Hardened Containment Vent System (HCVS) that provides a reliable hardened venting capability for pre-core damage and under severe accident conditions, including those involving a breach of the reactor vessel by molten core debris, in response to Reference 2. This attachment provides an update of milestone accomplishments since submittal of the Phase 1 Overall Integrated Plan, including any changes to the compliance method, schedule, or need for relief/relaxation and the basis, if any.

Milestone Accomplishments The following milestone(s) have been completed since the development of the Overall Integrated Plan (Reference 1), and are current as of November 30, 2014

  • Initial Outage for Phase 1 Planning

" Submit Six Month Status Report Milestone Schedule Status The following provides an update to Part 5 of the Overall Integrated Plan. It provides the activity status of each item, and whether the expected completion date has changed. The dates are planning dates subject to change as design and implementation details are developed. There are no changes to the current target dates in the Overall Integrated Plan at this time.

Target Comments Milestone MiletoneCompeto Completion Activity Status changes indate (Include this Date column)

Phase 1 HCVS Milestone Table Issue preliminary/conceptual design report Jun 2014 Complete Submit Overall Integrated Implementation Jun 2014 Complete Plan Initial Outage for Phase 1 Planning Nov 2014 Complete Submit 6 Month Status Report Dec 2014 Complete Submit 6 Month Status Report Jun 2015 Not Started Submit 6 Month Status Report Dec 2015 Not Started Design Complete Phase 1 Mar 2016 Started Submit 6 Month Status Report Jun 2016 Not Started Operations Procedure Changes Oct 2016 Not Started Developed Phase 1 Site Specific Maintenance and Testing Oct 2016 Not Started Procedures Developed Phase 1 Training Complete Phase 1 Oct 2016 Not Started Page 1 of 3

NextEra Energy Duane Arnold LLC's Six Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number 13-109)

Target Comments Milestone MiletoneCompeto Completion Activity Status changes indate (Include this Date _column)

Phase I HCVS Milestone Table End of Implementation Outage Phase 1 RFo25 Not Started End Rf of Not NSr Started Procedure Changes Active Phase 1 RF025 Walk Through Demonstration/Functional End of Not Started Test Phase 1 RF025 60 days Submit Completion Report after Not Started RF025 Changes to Compliance Method There are no changes to the compliance method as documented in the Phase 1 Overall Integrated Plan (Reference 1).

Need for Relief/Relaxation and Basis for the Relief/Relaxation NextEra Duane Arnold Energy Center, LLC expects to comply with the order implementation date and no relief/relaxation is required at this time.

Open Items from Overall Integrated Plan and Interim Staff Evaluation The following tables provide a summary of the open items documented in the Phase 1 Overall Integrated Plan or the Interim Staff Evaluation (ISE) and the status of each item.

Overall Integrated Plan Phase 1 Open Item Status Confirm secondary containment bypass leakage is Started acceptable without an installed rupture disk or retain an appropriated disk Perform severe accident evaluation for FLEX DG Started and replacement gas to confirm accessibility for use for post 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> actions Evaluate tornado/missile effects on HCVS Not Started components above the protected area of the Reactor Building Evaluate the system design for H2/CO measures to Started be taken Page 2 of 3

NextEra Energy Duane Arnold LLC's Six Month Status Report in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number 13-109)

Interim Staff Evaluation Open Item Status None Interim Staff Evaluation has not been issued as of this update.

Interim Staff Evaluation Impacts There are no potential impacts to the Interim Staff Evaluation identified at this time.

References The following references support the updates to the Phase 1 Overall Integrated Plan described in this Enclosure.

1. NextEra Duane Arnold Energy Center, LLC's Phase 1 Overall Integrated Plan in Response to June 6, 2013 Commission Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (Order Number EA-13-109)," dated June 25, 2014 (ML14182A423).
2. NRC Order Number EA-1 3-109, "Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions" dated June 6, 2013 (ML13130A067).
3. NEI 13-02, "Industry Guidance for Compliance with NRC Order EA-13-109, Revision 0," dated November 2013.
4. NRC Interim Staff Guidance JLD-ISG-2013-02, "Compliance with Order EA 109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 0, dated November 14, 2013 (ML13304B836).
5. NRC Endorsement of industry "Hardened Containment Venting System (HCVS)

Phase 1 Overall Integrated Plan Template (EA-13-109) Rev 0" (ML14128A219).

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