ML15196A035

Brunswick, Units 1 and 2 - Second 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

ML15196A035
Person / Time
Site:	Brunswick
Issue date:	06/25/2015
From:	Gideon W R Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BSEP 15-0044, EA-1 3-109, TAC MF4467, TAC MF4468
Download: ML15196A035 (10)

Text

u~DUKEVice President~'ENERGY. Brunswick Nuclear PlantP.O. Box 10429Southport, NC 28461o: 910.457.3698June 25, 2015Serial: BSEP 15-0044U.S. Nuclear Regulatory CommissionAttention: Document Control DeskWashington, D. C. 20555-0001

Subject:

Brunswick Steam Electric Piant (BSEP), Unit Nos. 1 and 2Renewed Facility Operating License Nos. DPR-71 and DPR-62Docket Nos. 50-325 and 50-324Second Six Month Status Report in Response to June 6, 2013, Commission OrderModifying Licenses with Regard to Reliable Hardened Containment Vents Capableof Operation Under Severe Accident Conditions (Order Number EA-1 3-1 09)

References:

1. Nuclear Regulatory Commission (NRC) Order Number EA.-1 3-109, Issuance of Order toModify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions, dated June 6, 2013, Agencywide DocumentsAccess and Management System (ADAMS) Accession Number ML13143A321.2. NRC Interim Staff Guidance JLD-ISG-2013-02, Compliance with Order EA-13-109, OrderModifying Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation under Severe Accident Conditions, dated November 14, 2013, ADAMS AccessionNumber ML13304B836.3. Duke Energy Letter, BSEP, Unit Nos. 1 and 2, Phase 1 Overall Integrated Plan in Responseto June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable HardenedContainment Vents Capable of Operation Under Severe Accident Conditions (Order NumberEA-13-109), dated June 26, 2014, ADAMS Accession Number ML14191A687.4. Duke Energy Letter, BSEP, Unit Nos. 1 and 2, First Six Month Status Report in Response toJune 6, 2013, Commission Order Modifying Licenses with Regard to Reliable HardenedContainment Vents Capable of Operation Under Severe Accident Conditions (Order NumberEA-13-109), dated December 17, 2014, ADAMS Accession Number ML14364A029.5. NRC Letter, Brunswick Steam Electric Plant, Units 1 and 2- Interim Staff EvaluationRelating to Overall Integrated Plan in Response to Phase 1 of Order EA-13-109 (SevereAccident Capable Hardened Vents) (TAC Nos. MF4467 and MF4468), datedMarch 10, 2015, ADAMS Accession Number ML15049A266.6. NEt 13-02, Industry Guidance for Compliance with Order EA-13-109, Revision 0,November 12, 2013, ADAMS Accessio~n Number ML13316A853.

U.S. Nuclear Regulatory CommissionPage 2 of 3Ladies and Gentlemen:On June 6, 2013, the Nuclear Regulatory Commission (NRC) issued an order (i.e., Reference 1)to Brunswick Steam Electric Plant (BSEP), Unit Nos. 1 and 2. Reference 1 was immediatelyeffective and directed BSEP to install a reliable hardened venting capability for pre-core damageand under severe accident conditions, including those involving a breach of the reactor vesselby molten core debris. Specific requirements are outlined in Attachment 2 of Reference 1.Reference 1 required submission of an Overall Integrated Plan (OIP) pursuant to Section IV,Condition D. Reference 2 endorsed industry guidance document NEI 13-02, Revision 0 (i.e.,Reference 6) with clarifications and exceptions. Reference 3 provided the Brunswick SteamElectric Plant OIP.References 1 and 6 required submission of a status report at six-month intervals followingsubmittal of the OIP. Reference 6 also provided direction regarding the content of the statusreports. The purpose of this letter is to provide the second six-month status report pursuant toSection IV, Condition D, of Reference 1, that delineates progress made in implementing therequirements of Reference 1. The enclosed report provides an update of milestoneaccomplishments since the submittal of the first six-month status report (i.e., Reference 4),including any changes to the compliance method, schedule, or need for relief and the basis, ifany.This letter contains no new regulatory commitments.If you have any questions regarding this submittal, please contact Mr. Lee Grzeck,Manager -Regulatory Affairs, at (910) 457-2487.I declare under penalty of perjury that the foregoing is true and correct.Executed on June 25, 2015.William R. Gideon

Enclosure:

Brunswick Steam Electric Plant (BSEP), Second Six-Month Status Report for theImplementation of Order EA-13-1 09, Order Modifying Licenses with Regard to ReliableHardened Containment Vents Capable of Operation Under Severe Accident Conditions U.S. Nuclear Regulatory CommissionPage 3 of 3cc (with enclosure):U.S. Nuclear Regulatory Commission, Region IIATTN: Mr. Victor M. McCree, Regional Administrator245 Peachtree Center Ave, NE, Suite 1200Atlanta, GA 30303-1 257U.S. Nuclear Regulatory CommissionATTN: Mr. Andrew Hon (Mail Stop OWFN 8G9A) (Electronic Copy Only)11555 Rockville PikeRockville, MD 20852-2738U.S. Nuclear Regulatory CommissionATTN: Mr. Peter Bamford (Mail Stop OWEN 8B3) (Electronic Copy Only)11555 PikeRockville, MD 20852-2738U.S. Nuclear Regulatory CommissionATTN: Ms. Michelle P. Catts, NRC Senior Resident Inspector8470 River RoadSouthport, NC 28461 -8869Chair -North Carolina Utilities CommissionPoO. Box 29510Raleigh, NC 27626-0510 ENCLOSUREBrunswick Steam Electric Piant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions1 IntroductionBrunswick Steam Electric Piant (BSEP) developed an Overall Integrated Plan (i.e., Reference 2to this enclosure) documenting the installation of a Hardened Containment Vent System (HCVS)that provides a reliable hardened venting capability for pre-core damage and under severeaccident conditions, including those involving a breach of the reactor vessel by molten coredebris, in response to Order Number EA-13-109 (i.e. Reference i to this enclosure). Thisenclosure provides the second update of milestone accomplishments since submittal of thePhase 1 Overall Integrated Plan including any changes to the compliance method, schedule, orneed for relief/relaxation, and the basis, if any.2 Milestone AccomplishmentsThe following milestones have been completed since the development of the Overall IntegratedPlan, and is current as of June 1, 2015.0SSubmit Overall Integrated Plan.Submit 6-Month Status Report (i.e., December 2014).3 Milestone Schedule StatusThe following provides an update to the Milestone Schedule of the Overall Integrated Plan. Itprovides the activity status of each item, and whether the expected completion date haschanged. The dates are planning dates subject to change as design and implementation detailsare developed. The revised milestone target completion dates do not impact the orderimplementation date.Holdicates a change since Targt 6 TontommentseHodpreliminary/conceptual design meeting. Jun. 2014 Complete. Date not revised.Submit Overall Integrated Plan. Jun. 2014 Complete. Date not revised.Submit 6 Month Status Report. Dec. 2014 *Complete. Date not revised.Submit 6 Month Status Report. Jun. 2015 *Started. Date not revised.Storage Plan. TBD Not started. Date not revised.Staffing analysis completion. TBD Not started. Date not revised.Page 1 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-1 09,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions.- ," ,"":: --. F-:: :':- arg-et?' C:: ": -Milestorie ' ,- C:,Ohmpletcirn :-A-ii" (Incluide ate*Indicates a change since last 6 month update.Long term use equipment acquisition timeline. TBD Not started. Date not revised.Simultaneous withSubmit 6 Month Status Report. Dec. 2015 Not started. Pae2OPUnit 2 Design Engineering On-site/Complete. Mar. 2016 Not started. Date not revised.Submit 6 Month Status Report. Jun. 2016 Not started. Date not revised.Operations Procedure Changes Developed. Dec. 2016 Not started. Date not revised.Site Specific Maintenance Procedure Dc 06 Ntsatd aentrvsdDeveloped. Dc 06 Ntsatd aentrvsdSubmit 6 Month Status Report. Dec. 2016 Not started. Date not revised.Outage start dateTraining Complete. Feb. 2017 Not started. moved up toFebruary 2017.Outage start dateUnit 2 Implementation Outage. Feb. 2017 Not started. moved up toFebruary 2017.Procedure Changes Active. Mar. 2017 Not started. Date not revised.Unit 2 Walk Through Mar. 2017 Not started. Date not revised.Demonstration/Functional Test.Unit 1 Design Engineering On-site/Complete. Mar. 2017 Not started. Date not revised.Submit 6 Month Status Report. Jun. 2017 Not started. Date not revised.Submit 6 Month Status Report. Dec. 2017 Not started. Date not revised.Outage start dateUnit 1 Implementation Outagel Feb. 2018 Not started. moved up toFebruary 2018.Page 2 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-13-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions: ' ... .-Milestone.. -.i Cormpleilor" S tavtus.÷ ..-' : <: j-:" : .." " '.. ..- : : .- .. och e .,ang es) ** Indicates a change since last 6 month update.Unit 1 Walk Through Mr 08 Ntsatd aentrvsdDemonstration/Functional Test. Mr 08 Ntsatd aentrvsdSubmit Completion Report. May 2018 Not started. Date not revised.4 Changes to Compliance MethodThere are no changes to the compliance method as documented in the Phase 1 OverallIntegrated Plan (i.e., Reference 2 to this enclosure).5 Need for Relief/Relaxation and Basis for the Relief/RelaxationBSEP expects to comply with the order implementation date and no relief/relaxation is requiredat this time.6 Open Items from Overall Integrated Plan and Interim Staff EvaluationThe following tables provide a summary of the open items documented in the Phase 1 OverallIntegrated Plan or the Interim Staff Evaluation (ISE) (i.e., Reference 3 to this enclosure) and thestatus of each item.*lIndicates a change since last 6 month update.1 Evaluate, design, and implement missile protection as required *Complete.for the HCVS piping external to the reactor building.2 Finalize location of the Remote Operating Station (ROS). Started.Finalize and design means to address flammable gases in the Started.HCVS.Evaluate location of FLEX Diesel Generator (DG) for accessibility Started.under Severe Accident conditions.Page 3 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditionspower supply transfer, and vent valve operation from the main5 control room and ROS), vent support functions for sustainedoperation and portable equipment deployment (FLEX DG supplyto the 24/48VDC battery system, and makeup to the nitrogenbackup system).Confirm suppression pool heat capacity. Initial results from GE *Complete.report 0000-0165-0656-RO for BSEP indicate the suppression6pool reaches the heat capacity temperature limit (HCTL) in 2.11hours.7 Finalize location of supplemental N2 bottle connection. Not started.8Establish programs and processes for control of HCVS *Started.equipment functionality, out-of-service time, and testing.Confirm Wetwell vent capacity is sufficient at the containment Started.design pressure (62 psig). Existing calculation 0012-0009calculates a wetwell vent capacity at the primary containmentpressure limit (PCPL, 70 psig).* Indicates a change since last 6 month update.Make available for NRC staff audit the site specific controlling *Add ISE Open Item.1document for HCVS out of service and compensatory measures. Not started.Page 4 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident ConditionsHCVS has the capacity to vent the steam/energy equivalent of Not started.one percent of licensed/rated thermal power (i.e., unless a lowervalue is justified), and that the suppression pool and the HCVS2 together are able to absorb and reject decay heat, such thatfollowing a reactor shutdown from full power containmentpressure is restored and then maintained below the primarycontainment design pressure and the primary containmentpressure limit.Make available for NRC staff audit confirmation of the time it *Add ISE Open Item.3takes the suppression pool to reach the heat capacity Not started.temperature limit during extended loss of AC power (ELAP) withRCIC in operation.Make available for NRC staff audit a description of the final ROS *Add ISlE Open Item.4location. Not started.Make available for NRC staff audit documentation that *Add ISlE Open Item.5 demonstrates adequate communication between the remote Not started.HCVS operation locations and the HCVS decision makers duringELAP and severe accident conditions.Provide a description of the final design of the HCVS to address *Add ISlE Open Item.6 hydrogen detonation/deflagration. Not started.Make available for NRC staff audit seismic and tornado missile *Add ISlE Open Item.7final design criteria for the HCVS stack. Not started.Make available for NRC staff audit documentation of the HCVS *Add ISlE Open Item.8 nitrogen pneumatic system design including sizing and location. Not started.Make available for NRC staff audit documentation of HCVS *Add ISE Open Item.9incorporation into the FLEX diesel generator loading calculation. Not started.Make available for NRC staff audit an evaluation of temperature *Add ISlE Open Item.10 and radiological conditions to ensure that operating personnel Not started.can safely access and operate control and support equipment.Page 5 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident ConditionsInterim Stdff Evaluation (ISE) Phas~ 1 Open Items Sfatus*Indicates a chanae since last 6 month uodate.Make available for NRC staff audit descriptions of all *Add ISE Open Item.11 instrumentation and controls (existing and planned) necessary to Not started.implement this order including qualification methods.Clarify whether the seismic reliability demonstration of *Add ISE Open Item.instruments, including valve position indication, vent pipe Not started.12temperature instrumentation, radiation monitoring, and support12system monitoring will (be) via methods that predict performancedescribed in IEEE-344-2004 or provide justification for using adifferent revision of the standard.Make available for NRC staff audit a justification for not *Add ISE Open Item.13 monitoring HCVS system pressure as described in NEI 13-02. Not started.Make available for NRC staff audit the descriptions of local *Add ISE Open Item.conditions (temperature, radiation and humidity) anticipated Not started.during ELAP and severe accident for the components (valves,14 instrumentation, sensors, transmitters, indicators, electronics,control devices, etc.) required for HCVS venting includingconfirmation that the components are capable of performing theirfunctions during ELAP and severe accident conditions.Make available for NRC staff audit documentation of an *Add ISE Open Item.evaluation verifying the existing containment isolation valves, Not started.15 relied upon for the HCVS, will open under the maximumexpected differential pressure during BDBEE and severeaccident wetwell venting.Provide a description of the strategies for hydrogen control that *Add ISE Open Item.16 minimizes the potential for hydrogen gas migration and ingress Not started.into the reactor building or other buildings.Page 6 of 7 ENCLOSUREBrunswick Steam Electric Plant (BSEP),Second Six-Month Status Report for the Implementation of Order EA-1 3-109,Order to Modify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions7 ReferencesThe following references support the updates to the Phase 1 Overall Integrated Plan describedin this enclosure.1. Nuclear Regulatory Commission (NRC) Order Number EA-1 3-109, Issuance of Ord/er toModify Licenses with Regard to Reliable Hardened Containment Vents Capable ofOperation Under Severe Accident Conditions, dated June 6, 2013, Agencywide DocumentsAccess and Management System (ADAMS) Accession Number ML1 31 43A321.2. Duke Energy Letter, BSEP, Unit Nos. 1 and 2, Phase 1 Overall Integrated Plan in Responseto June 6, 2013, Commission Order Modifying Licenses with Regard to Reliable HardenedContainment Vents Capable of Operation Under Severe Accident Conditions (Order NumberEA-13-109), dated June 26, 2014, ADAMS Accession Number ML14191A687.3. NRC Letter, Brunswick Steam Electric Plant, Units 1 and2 2- Interim Staff EvaluationRelating to Overall Integrated Plan in Response to Phase 1 of Order EA-13-109 (SevereAccident Capable Hardened Vents) (TAC Nos. MF4467 and MF4468), datedMarch 10, 2015, ADAMS Accession Number ML15049A266.Page 7 of 7