RS-14-302, First Six-Month Status Report 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 Condition

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First Six-Month Status Report 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 Condition
ML14351A442
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 12/17/2014
From: Kaegi G
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
EA-13-109, RS-14-302
Download: ML14351A442 (8)
v • d • e


Text

Ammr- Exelon Generation Order No. EA-13-109 RS-14-302 December 17, 2014 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-237 and 50-249

Subject:

First Six-Month Status Report 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)

References:

1. NRC Order Number EA-13-109, "Issuance of Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," dated June 6, 2013
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," Revision 0, dated November 14, 2013
3. NEI 13-02, "Industry Guidance for Compliance with NRC Order EA-13-109, BWR Mark I

& II Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 0, dated November 2013

4. Exelon Generation Company, LLC's Answer 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 26, 2013
5. Exelon Generation Company, LLC 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 30, 2014 (RS-14-058)

On June 6, 2013, the Nuclear Regulatory Commission ("NRC" or "Commission") issued an order (Reference 1) to Exelon Generation Company, LLC (EGC). Reference 1 was immediately effective and directs EGC to require their BWRs with Mark I and Mark II containments to take certain actions to ensure that these facilities have a hardened containment vent system (HCVS) to remove decay heat from the containment, and maintain control of containment pressure

U.S. Nuclear Regulatory Commission Integrated Plan Report to EA-13-109 December 17, 2014 Page 2 within acceptable limits following events that result in loss of active containment heat removal capability while maintaining the capability to operate under severe accident (SA) conditions resulting from an Extended Loss of AC Power (ELAP). Specific requirements are outlined in of Reference 1.

Reference 1 required submission of an initial status report 20 days following issuance of the final interim staff guidance (Reference 2) and a Phase 1 Overall Integrated Plan pursuant to Section IV, Condition D by June 30, 2014. Reference 2 endorses industry guidance document NEI 13-02, Revision 0 (Reference 3) with clarifications and exceptions identified in Reference 2.

Reference 4 provided the EGC initial status report regarding reliable hardened containment vents capable of operation under severe accident conditions. Reference 5 provided the Dresden Nuclear Power Station, Units 2 and 3 Phase 1 Overall Integrated Plan.

Reference 1 requires submission of a status report at six-month intervals following submittal of the Phase 1 overall integrated plan. Reference 3 provides direction regarding the content of the status reports. The purpose of this letter is to provide the first six-month status report for Phase 1 pursuant to Section IV, Condition D.3, 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 David P. Helker at 610-765-5525.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 17th day of December 2014.

Respectfully submitted, Glen T. Kaegi Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC

Enclosure:

Dresden Nuclear Power Station, Units 2 and 3 First Six-Month Status Report for Phase 1 Implementation of Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions

U.S. Nuclear Regulatory Commission Integrated Plan Report to EA-13-109 December 17, 2014 Page 3 cc: Director, Office of Nuclear Reactor Regulation NRC Regional Administrator - Region III NRC Senior Resident Inspector - Dresden Nuclear Power Station, Units 2 and 3 NRC Project Manager, NRR - Dresden Nuclear Power Station, Units 2 and 3 Mr. Charles H. Norton, NRR/JLD/PPSD/JOMB, NRC Mr. John P. Boska, NRR/JLD/JOMB, NRC Illinois Emergency Management Agency - Division of Nuclear Safety

Enclosure Dresden Nuclear Power Station, Units 2 and 3 First Six-Month Status Report for Phase 1 Implementation of Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions (4 pages)

Enclosure Dresden Nuclear Power Station, Units 2 and 3 First Six Month Status Report for the Implementation of Order EA-13-109, "Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions" 1 Introduction Dresden Nuclear Power Station, Units 2 and 3 (Dresden Station) developed an Overall Integrated Plan (Reference 1 in Section 8), documenting the 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.

2 Milestone Accomplishments The following milestone(s) have been completed since the development of the Overall Integrated Plan (Reference 1), and are current as of December 15, 2014.

  • Held preliminary/conceptual design meeting
  • Kickoff meeting for Sargent & Lundy (S&L) contract for Engineering Services, December 2, 2014
  • First Six-Month Update (complete with this submittal) 3 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.

The revised milestone target completion dates do not impact the order implementation date.

Target Comments Milestone Completion Activity Status Date Phase 1 HCVS Milestone Table Submit Overall Integrated Plan June 2014 Complete Submit 6 Month Updates:

Complete with Update 1 December 2014 this submittal Page 1 of 4

Dresden Nuclear Power Station, Units 2 and 3 First Six Month Status Report for the Implementation of HCVS Phase 1 December 17, 2014 Target Comments Milestone Completion Activity Status Date Phase 1 HCVS Milestone Table Update 2 June 2015 Not Started Update 3 December 2015 Not Started Update 4 June 2016 Not Started Update 5 December 2016 Not Started Update 6 June 2017 Not Started Update 7 December 2017 Not Started Modifications:

Hold preliminary/conceptual design meeting June 2014 Complete Kickoff Meeting with S&L December 2014 Complete U3 Initial Design Engineering Modification October 2015 Started Complete Unit 3 Implementation Outage (Phase 1) October 2016 Not Started U2 Initial Design Engineering Modification October 2016 Not Started Complete Operations Procedure Changes Developed November 2016 Not Started Site Specific Maintenance Procedure November 2016 Not Started Developed U3 Training Complete November 2016 Not Started U3 Procedure Changes Active November 2016 Not Started U3 Walk Through Demonstration/Function November 2016 Not Started Test Submit U3 Phase 1 Completion Report January 2017 Not Started U2 Implementation Outage (Phase 1) October 2017 Not Started U2 Training Complete November 2017 Not Started U2 Procedure Changes Active November 2017 Not Started U2 Walk Through November 2017 Not Started Demonstration/Functional Test Submit U2 Phase 1 Completion Report January 2018 Not Started Page 2 of 4

Dresden Nuclear Power Station, Units 2 and 3 First Six Month Status Report for the Implementation of HCVS Phase 1 December 17, 2014 4 Changes to Compliance Method There are no changes to the compliance method as documented in the Phase 1 Overall Integrated Plan (Reference 1).

5 Need for Relief/Relaxation and Basis for the Relief/Relaxation Dresden Station expects to comply with the order implementation date; therefore, no relief/relaxation is required at this time.

6 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 I Open Items Open Action Status Item I. Confirm that at least 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> battery coping time is available. Started

2. Determine actions to enable Wet Well venting following a Started flooding around the torus
3. Determine how Motive Power and/or HCVS Battery Power Not Started will be disabled during normal operation Performed as part of detailed design
4. Confirm that the Remote Operating Station (ROS) will be in an Not Started accessible area following a Severe Accident (SA) Performed as part of detailed design
5. Confirm diameter on new common HCVS Piping Not Started Performed as part of detailed design
6. Confirm suppression pool heat capacity Started
7. Determine the approach for combustible gases Not Started Performed as part of detailed design
8. Provide procedures for HCVS Operation Not Started Performed as part of detailed design Page 3 of 4

Dresden Nuclear Power Station, Units 2 and 3 First Six Month Status Report for the Implementation of HCVS Phase 1 December 17, 2014 Interim Staff Evaluation Open Items None 7 Interim Staff Evaluation Impacts There are no potential impacts to the Interim Staff Evaluation identified at this time.

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

1. Dresden Nuclear Power Station, Units 2 and 3, 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 30, 2014.
2. NRC Order Number EA-13-109, "Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," dated June 6, 2013.
3. NEI 13-02, "Industry Guidance for Compliance with NRC Order EA-13-109, 'To Modify Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions," Revision 0, dated November 2013.
4. 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," Revision 0, dated November 14, 2013 (Accession No. ML13304B836).
5. NRC Endorsement of industry "Hardened Containment Venting System (HCVS) Phase 1 Overall Integrated Plan Template (EA-13-109) Revision 0," (Accession No. ML14128A219).

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