L-14-035, December 2014 Six-Month Status Report in Response to Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions

From kanterella
Jump to navigation Jump to search

December 2014 Six-Month Status Report in Response to Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions
ML14356A192
Person / Time
Site: Nine Mile Point  Constellation icon.png
Issue date: 12/16/2014
From: Korsnick M
Constellation Energy Nuclear Group, Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
EA-13-109, FLL-14-035
Download: ML14356A192 (10)
v • d • e


Text

AMaria Korsnlck A0 ANW M Exe!.on Generation. Senior Vice President, Northeast Operations Chief Nuclear Officer, CENG 100 Constellation Way Constellation Energy Nuclear Group, LLC BaltimoreMD 21202 410-470-5133 Office 443-213-6739 Fax www.exeloncorp.com maria.korsnick@exeloncorp.com NRC Order No. EA-13-109 FLL- 14-035 December 16, 2014 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Nine Mile Point Nuclear Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-63 and NPF-69 Docket Nos. 50-220 and 50-410

Subject:

December 2014 Six-Month Status Report in Response to Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions

References:

(1) 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 (ML13143A321)

(2) Letter from M. G. Korsnick (Exelon) to Document Control Desk (NRC),

Nine Mile Point Nuclear Station, Units 1 and 2, Overall Integrated Plan per Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 27, 2014 (ML14184B340)

On June 6, 2013, the Nuclear Regulatory Commission (NRC) issued Order EA-13-109 (Reference 1) to all licensees that operate boiling-water reactors (BWRs) with Mark I and Mark II containments 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 within acceptable limits following events that result in the 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).

Attachments (1) and (2) provide the first Six-Month Status Reports for Nine Mile Point Nuclear Station, LLC (NMPNS) Unit 1 (NMP1) and Unit 2 (NMP2), respectively. This report updates the milestone accomplishments since the submittal of the Overall Integrated Plan on June 27, 2014 (Reference (2), including any changes to the compliance method, schedule, or need for relief and the basis, if any.

This letter contains no new regulatory commitments. A 'S\

U. S. Nuclear Regulatory Commission December 16, 2014 Page 2 If there are any questions regarding this submittal, please contact Bruce Montgomery, Acting Manager - Licensing, at 443-532-6533.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 1 6 th day of December, 2014.

Sincerely, Mary G. Korsnick MGK/STD Attachments: (1) Six-Month Status Report (December 2014) for Nine Mile Point Unit 1 Overall Integrated Plan for Reliable Hardened Vents (2) Six-Month Status Report (December 2014) for Nine Mile Point Unit 2 Overall Integrated Plan for Reliable Hardened Vents cc: Director, Office of Nuclear Reactor Regulation Mr. William D. Reckley, NRR/JLD/PSB, NRC Regional Administrator, Region I, USNRC Mr. Rajender Auluck, NRR/JLD/PSB, NRC NRC Project Manager, NMPNS NRC Resident Inspector, NMPNS

ATTACHMENT (1)

SIX-MONTH STATUS REPORT (DECEMBER 2014)

NINE MILE POINT UNIT 1 OVERALL INTEGRATED PLAN FOR RELIABLE HARDENED VENTS Nine Mile Point Nuclear Station, LLC December 16, 2014

Attachment 1 Nine Mile Point Unit 1 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 Nine Mile Point Unit 1 (NMP1) developed an Overall Integrated Plan (Reference 1),

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 1, 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.

Milestone Target Activity Comments Completion Status [include date Date changes in this column Hold preliminary/conceptual design meeting Nov 2013 Complete Submit Overall Integrated Implementation Plan Jun 2014 Complete Submit 6 Month Status Report Dec 2014 Complete Submit 6 Month Status Report Jun 2015 Submit 6 Month Status Report Dec. 2015 Simultaneous with Phase 2 OIP Page 1 of 3

Nine Mile Point Unit 1 First Six Month Status Report for the Implementation of HCVS Phase 1 Design Engineering Complete April 2016 Operations Procedure Changes Developed Dec 2016 Site Specific Maintenance Procedure Dec 2016 Developed Training Complete Feb 2017 NMP1 Implementation Outage Apr 2017 Procedure Changes Active Apr 2017 Walk Through Demonstration/Functional Test Apr 2017 Submit Completion Report June 2017 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 NMP1 Station expects to comply with the order implementation date and 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 1 Open Item Status

1. Perform final sizing evaluation for HCVS Not Started batteries and battery charger and include in FLEX DG loading calculation
2. Perform final vent capacity calculation for the Started Torus HCVS piping confirming 1% minimum capacity
3. Perform final sizing evaluation for pneumatic Not Started Nitrogen (N2) supply Page 2 of 3

Nine Mile Point Unit 1 First Six Month Status Report for the Implementation of HCVS Phase 1

4. Perform confirmatory environmental condition Not Started evaluation for the Turbine Building in the vicinity of the Remote Operating Station (ROS) and HCVS dedicated pneumatic supply and batteries
5. State which approach or combination of Started approaches the plant determines is necessary to address the control of combustible gases downstream of the HCVS control valve
6. Complete evaluation for environmental/seismic Not Started qualification of HCVS components
7. Complete evaluation for environmental conditions Not Started and confirm the travel path accessibility Interim Staff Evaluation Open Item Status No items at the present time.

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. Letter from M. G. Korsnick to Document Control Desk (NRC), Overall Integrated Plan per Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 30, 2014(ML14184B340)
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.(ML13143A321)
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, dated November 2013(ML13316A853)

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, dated November 2013 (ML13304B836).

Page 3 of 3

ATTACHMENT (2)

SIX-MONTH STATUS REPORT (DECEMBER 2014)

NINE MILE POINT UNIT 2 OVERALL INTEGRATED PLAN FOR RELIABLE HARDENED VENTS Nine Mile Point Nuclear Station, LLC December 16, 2014

Attachment 2 Nine Mile Point Unit 2 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 Nine Mile Point Unit 2 (NMP2) developed an Overall Integrated Plan (Reference 1),

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 1, 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.

Milestone Target Activity Comments Completion Status (Include date Date changes in this column}

Hold preliminary/conceptual design meeting Nov 2013 Complete Submit Overall Integrated Implementation Plan Jun 2014 Complete Submit 6 Month Status Report Dec 2014 Complete Design Engineering Complete Mar 2015 Jun 20151 Submit 6 Month Status Report Jun 2015 Date changed to reflect completion of both outage and non-outage related engineering change packages.

Page 1 of 3

Nine Mile Point Unit 2 First Six Month Status Report for the Implementation of HCVS Phase 1 Operations Procedure Changes Developed Dec 2015 Site Specific Maintenance Procedure Dec 2015 Developed Submit 6 Month Status Report Dec. 2015 Simultaneous with Phase 2 OIP Training Complete Feb 2016 NMP2 Implementation Outage Apr 2016 Procedure Changes Active Apr 2016 Walk Through Demonstration/Functional Test Apr 2016 Submit Completion Report June 2016 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 NMP2 Station expects to comply with the order implementation date and 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 1 Open Item Status

1. Perform final sizing evaluation for HCVS Not Started batteries and battery charger and include in FLEX DG loading calculation
2. Perform final vent capacity calculation for the Started Torus HCVS piping confirming 1% minimum capacity
3. Perform final sizing evaluation for pneumatic Not Started Nitrogen (N2) supply Page 2 of 3

Nine Mile Point Unit 2 First Six Month Status Report for the Implementation of HCVS Phase 1

4. Perform seismic evaluation of Reactor Building Not Started Track Bay
5. State which approach or combination of Started approaches the plant determines is necessary to address the control of combustible gases downstream of the HCVS control valve
6. Complete evaluation for environmental/seismic Not Started qualification of HCVS components
7. Complete evaluation for environmental conditions Not Started and confirm the travel path accessibility
8. Perform final environmental evaluation of the Not Started Remote Operating Station (ROS) location.

Interim Staff Evaluation Open Item Status No items at the present time.

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. Letter from M. G. Korsnick to Document Control Desk (NRC), Overall Integrated Plan per Order EA-1 3-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 30, 2014(ML14184B340)
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(ML13143A321)
3. NEI 13-02, Industry Guidance for Compliance with NRC Order EA-1 3-109, BWR Mark I &

II Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated November 2013(ML13316A853)

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, dated November 2013 ( ML13304B836).

Page 3 of 3

AMaria Korsnlck A0 ANW M Exe!.on Generation. Senior Vice President, Northeast Operations Chief Nuclear Officer, CENG 100 Constellation Way Constellation Energy Nuclear Group, LLC BaltimoreMD 21202 410-470-5133 Office 443-213-6739 Fax www.exeloncorp.com maria.korsnick@exeloncorp.com NRC Order No. EA-13-109 FLL- 14-035 December 16, 2014 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Nine Mile Point Nuclear Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-63 and NPF-69 Docket Nos. 50-220 and 50-410

Subject:

December 2014 Six-Month Status Report in Response to Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions

References:

(1) 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 (ML13143A321)

(2) Letter from M. G. Korsnick (Exelon) to Document Control Desk (NRC),

Nine Mile Point Nuclear Station, Units 1 and 2, Overall Integrated Plan per Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 27, 2014 (ML14184B340)

On June 6, 2013, the Nuclear Regulatory Commission (NRC) issued Order EA-13-109 (Reference 1) to all licensees that operate boiling-water reactors (BWRs) with Mark I and Mark II containments 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 within acceptable limits following events that result in the 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).

Attachments (1) and (2) provide the first Six-Month Status Reports for Nine Mile Point Nuclear Station, LLC (NMPNS) Unit 1 (NMP1) and Unit 2 (NMP2), respectively. This report updates the milestone accomplishments since the submittal of the Overall Integrated Plan on June 27, 2014 (Reference (2), including any changes to the compliance method, schedule, or need for relief and the basis, if any.

This letter contains no new regulatory commitments. A 'S\

U. S. Nuclear Regulatory Commission December 16, 2014 Page 2 If there are any questions regarding this submittal, please contact Bruce Montgomery, Acting Manager - Licensing, at 443-532-6533.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 1 6 th day of December, 2014.

Sincerely, Mary G. Korsnick MGK/STD Attachments: (1) Six-Month Status Report (December 2014) for Nine Mile Point Unit 1 Overall Integrated Plan for Reliable Hardened Vents (2) Six-Month Status Report (December 2014) for Nine Mile Point Unit 2 Overall Integrated Plan for Reliable Hardened Vents cc: Director, Office of Nuclear Reactor Regulation Mr. William D. Reckley, NRR/JLD/PSB, NRC Regional Administrator, Region I, USNRC Mr. Rajender Auluck, NRR/JLD/PSB, NRC NRC Project Manager, NMPNS NRC Resident Inspector, NMPNS

ATTACHMENT (1)

SIX-MONTH STATUS REPORT (DECEMBER 2014)

NINE MILE POINT UNIT 1 OVERALL INTEGRATED PLAN FOR RELIABLE HARDENED VENTS Nine Mile Point Nuclear Station, LLC December 16, 2014

Attachment 1 Nine Mile Point Unit 1 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 Nine Mile Point Unit 1 (NMP1) developed an Overall Integrated Plan (Reference 1),

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 1, 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.

Milestone Target Activity Comments Completion Status [include date Date changes in this column Hold preliminary/conceptual design meeting Nov 2013 Complete Submit Overall Integrated Implementation Plan Jun 2014 Complete Submit 6 Month Status Report Dec 2014 Complete Submit 6 Month Status Report Jun 2015 Submit 6 Month Status Report Dec. 2015 Simultaneous with Phase 2 OIP Page 1 of 3

Nine Mile Point Unit 1 First Six Month Status Report for the Implementation of HCVS Phase 1 Design Engineering Complete April 2016 Operations Procedure Changes Developed Dec 2016 Site Specific Maintenance Procedure Dec 2016 Developed Training Complete Feb 2017 NMP1 Implementation Outage Apr 2017 Procedure Changes Active Apr 2017 Walk Through Demonstration/Functional Test Apr 2017 Submit Completion Report June 2017 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 NMP1 Station expects to comply with the order implementation date and 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 1 Open Item Status

1. Perform final sizing evaluation for HCVS Not Started batteries and battery charger and include in FLEX DG loading calculation
2. Perform final vent capacity calculation for the Started Torus HCVS piping confirming 1% minimum capacity
3. Perform final sizing evaluation for pneumatic Not Started Nitrogen (N2) supply Page 2 of 3

Nine Mile Point Unit 1 First Six Month Status Report for the Implementation of HCVS Phase 1

4. Perform confirmatory environmental condition Not Started evaluation for the Turbine Building in the vicinity of the Remote Operating Station (ROS) and HCVS dedicated pneumatic supply and batteries
5. State which approach or combination of Started approaches the plant determines is necessary to address the control of combustible gases downstream of the HCVS control valve
6. Complete evaluation for environmental/seismic Not Started qualification of HCVS components
7. Complete evaluation for environmental conditions Not Started and confirm the travel path accessibility Interim Staff Evaluation Open Item Status No items at the present time.

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. Letter from M. G. Korsnick to Document Control Desk (NRC), Overall Integrated Plan per Order EA-13-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 30, 2014(ML14184B340)
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.(ML13143A321)
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, dated November 2013(ML13316A853)

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, dated November 2013 (ML13304B836).

Page 3 of 3

ATTACHMENT (2)

SIX-MONTH STATUS REPORT (DECEMBER 2014)

NINE MILE POINT UNIT 2 OVERALL INTEGRATED PLAN FOR RELIABLE HARDENED VENTS Nine Mile Point Nuclear Station, LLC December 16, 2014

Attachment 2 Nine Mile Point Unit 2 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 Nine Mile Point Unit 2 (NMP2) developed an Overall Integrated Plan (Reference 1),

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 1, 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.

Milestone Target Activity Comments Completion Status (Include date Date changes in this column}

Hold preliminary/conceptual design meeting Nov 2013 Complete Submit Overall Integrated Implementation Plan Jun 2014 Complete Submit 6 Month Status Report Dec 2014 Complete Design Engineering Complete Mar 2015 Jun 20151 Submit 6 Month Status Report Jun 2015 Date changed to reflect completion of both outage and non-outage related engineering change packages.

Page 1 of 3

Nine Mile Point Unit 2 First Six Month Status Report for the Implementation of HCVS Phase 1 Operations Procedure Changes Developed Dec 2015 Site Specific Maintenance Procedure Dec 2015 Developed Submit 6 Month Status Report Dec. 2015 Simultaneous with Phase 2 OIP Training Complete Feb 2016 NMP2 Implementation Outage Apr 2016 Procedure Changes Active Apr 2016 Walk Through Demonstration/Functional Test Apr 2016 Submit Completion Report June 2016 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 NMP2 Station expects to comply with the order implementation date and 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 1 Open Item Status

1. Perform final sizing evaluation for HCVS Not Started batteries and battery charger and include in FLEX DG loading calculation
2. Perform final vent capacity calculation for the Started Torus HCVS piping confirming 1% minimum capacity
3. Perform final sizing evaluation for pneumatic Not Started Nitrogen (N2) supply Page 2 of 3

Nine Mile Point Unit 2 First Six Month Status Report for the Implementation of HCVS Phase 1

4. Perform seismic evaluation of Reactor Building Not Started Track Bay
5. State which approach or combination of Started approaches the plant determines is necessary to address the control of combustible gases downstream of the HCVS control valve
6. Complete evaluation for environmental/seismic Not Started qualification of HCVS components
7. Complete evaluation for environmental conditions Not Started and confirm the travel path accessibility
8. Perform final environmental evaluation of the Not Started Remote Operating Station (ROS) location.

Interim Staff Evaluation Open Item Status No items at the present time.

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. Letter from M. G. Korsnick to Document Control Desk (NRC), Overall Integrated Plan per Order EA-1 3-109 Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated June 30, 2014(ML14184B340)
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(ML13143A321)
3. NEI 13-02, Industry Guidance for Compliance with NRC Order EA-1 3-109, BWR Mark I &

II Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions, dated November 2013(ML13316A853)

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, dated November 2013 ( ML13304B836).

Page 3 of 3

Retrieved from "https://kanterella.com/w/index.php?title=L-14-035,_December_2014_Six-Month_Status_Report_in_Response_to_Order_EA-13-109_Modifying_Licenses_with_Regard_to_Reliable_Hardened_Containment_Vents_Capable_of_Operation_Under_Severe_Accident_Conditions&oldid=2039789"