GNRO-2016/00051, Grand Gulf, Unit 1 - Application to Revise the Technical Specifications to Allow the Adoption of Technical Specification Task Force Traveler TSTF-427, Revision 2, Allowance for Non Technical Specification Barrier Degradation on Suppo

Grand Gulf, Unit 1 - Application to Revise the Technical Specifications to Allow the Adoption of Technical Specification Task Force Traveler TSTF-427, Revision 2, Allowance for Non Technical Specification Barrier Degradation on Supported Sy

ML16301A150
Person / Time
Site:	Grand Gulf
Issue date:	10/26/2016
From:	Fallacara V Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2016/00051
Download: ML16301A150 (22)

Text

=e:d Entergy GNRO-2016/00051 October26,2016U.S.Nuclear Regulatory Commission Attn: DocumentControlDeskWashington,DC20555-0001 Entergy Operations, Inc.P.O.Box756PortGibson,MS39150VincentFallacaraSiteVicePresidentTel.(601)437-2129

DearSirorMadam:

ApplicationtoRevisetheGrand Gulf NuclearStationUnit1Technical SpecificationstoAllowthe Adoption of Technical SpecificationTaskForce Traveler TSTF-427,Revision2,"AllowanceforNon Technical Specification Barrier Degradation on SupportedSystemOPERABI L1TY"GrandGulf NuclearStation,Unit1DocketNo.50-416LicenseNo.NPF-29TSTF-427,Revision2,"AllowanceforNon Technical Specification Barrier Degradation on SupportedSystemOPERABI L1TY"Pursuantto10CFR50.90,Entergy OperationInc.(Entergy)issubmittingarequestforan amendmenttothe Technical Specifications(TS)fortheGrand GulfNuclearStationUnit1.Theproposed amendmentwouldmodifyTS requirements for unavailablebarriersbyaddingLCO3.0.9.Attachment1providesa description and assessmentoftheproposedchanges.

Attachment 2providestheexistingTSpagesmarkeduptoshowtheproposedchanges.

Attachment 3providesrevised(clean)TSpages.

Attachment4providesthe marked-upcopyoftheTSBases pages.Attachment5providesa summaryofthe regulatory commitmentsmadeinthis submittal.Approvaloftheproposed amendmentisrequestedby September 1,2017.Onceapproved,the amendmentshallbe implementedwithin90daysfollowing issuanceoftheamendment.

In accordancewith10CFR50.91,acopyofthisapplication,with attachments,isbeingprovidedtothe designatedMississippiOfficial.Ifyouhaveany questionsorrequire additionalinformation,pleasecontactJamesNadeauat 601-437-2103.

GNRO-2016/00051Page2of3 I declare under penalty of perjury that the foregoingistrueand correct.Executedonthe zs"dayof October, 2016.Attachment(s):

1.2.3.4.5.Description and Assessment of Technical Specifications ChangesProposedTechnical Specification Changes (Marked-Up)

Revised Technical Specification Pages (Clean)Proposed Technical Specification Bases Pages (Marked-Up)

Regulatory Commitmentscc:with Attachment(s)Mr.JohnP.Boska, Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S.Nuclear Regulatory CommissionMailStop 0-8-C2 Washington, DC 20555 GNRO-2016/00051Page3of3cc:without Attachment(s)Mr.MarkDapas,Regional Administrator,RegionIV U.S.Nuclear Regulatory Commission1600East Lamar BoulevardArlington,TX76011-4511 U.S.Nuclear Regulatory CommissionATTN:Mr.James Kim, NRR/DORL (w/2)MailStop OWFN/8 B111555RockvillePikeRockville,MD 20852-2738 NRC Senior Resident InspectorGrandGulf Nuclear StationPortGibson,MS39150Dr.MaryCurrier,M.D.,M.P.HStateHealth Officer Mississippi DepartmentofHealthP.O.Box1700Jackson,MS 39215-1700 Email: mary.currier@msdh.ms.gov Attachment 1 to GNRO-2016/00051 Description and Assessment of Technical Specifications Changes GNRO-2016/00051 Attachment 1 Description and Assessment

1.0 DESCRIPTION

The proposed amendment would modify technical specifications (TS)requirements for unavailable barriersbyaddingLCO3.0.9.

The changes are consistent with Nuclear Regulatory Commission (NRC)approved Industry/Technical Specification TaskForce(TSTF)STS change TSTF-427Revision2.

The availability of this TS improvement was publishedinthe Federal Register on October3,2006,71Fed.Reg.58444aspartofthe consolidatedlineitem improvement process (CLIIP).2.0 ASSESSMENT 2.1 Applicability, of Published Safety Evaluation Entergy Operations,Inc.hasreviewedthe safety evaluation dated October 3,2006 aspartoftheCLIIP.Thisreview includedareviewoftheNRC staff's evaluation,aswellas the supporting information provided to support TSTF-427.Entergy Operations,Inc.has concludedthatthe justifications presentedinthe TSTF proposalandthe safety evaluation preparedbytheNRCstaffare applicabletoGrandGulf NuclearStationUnit1and justify this amendmentforthe incorporationofthe changestotheGrandGulf NuclearStationTS.

2.2 Optional

Changes and Variations Entergy Operations,Inc.isnot proposing any variations or deviationsfromtheTS changes describedinthe TSTF-427Revision2ortheNRC staff's model safety evaluation dated October 3,2006(71FR58444).

On November27,2012,theNRC publishedaFederal Register Notice stating that Regulatory Guide(RG)1.182hasbeen withdrawnandthe subject matterhasbeen'incorporatedintoRG1.160,"Monitoring the Effectiveness of Maintenance at Nuclear PowerPlants."(77FR70846).RG1.160 endorsesRevision2of NUMARC 93-01,datedApril2011.

TSTF-427andthe proposedBases,themodel application and commitments,themodelSafety Evaluation,andthe implementation guidance referenceRG1.182,"Assessing and ManagingRiskBefore.

Maintenance Activities at Nuclear PowerPlants,"which endorses the February 200bversionof NUMARC 93-01,"Monitoring the Effectiveness of Maintenance at Nuclear Power Plants." References and commitmentstoRG1.182inthese documents are assumedtorefertoRG1.160andRevision2of NUMARC93-01insteadofRG1.182.

ReferencestoRG1.182inthe Technical SpecificationBasesandmodel applicationhavebeenrevisedtorefertoRG 1.160.

GNRO-2016/00051 Attachment 1 3.0 REGULATORY ANALYSIS3.1No Significant Hazards Consideration Determination Entergy Operations,Inc.has reviewed the proposed no significant hazards consideration determination (NSHCD)publishedinthe Federal RegisteraspartoftheCLIIP.Entergy Operations,Inc.has concludedthatthe proposed NSHCD presented intheFederal Registernoticeis applicabletoGrandGulfandis hereby incorporated byreferenceto satisfy the requirementsof10CFR50.91(a).

3.2 Verification

and Commitments As discussedinthenoticeof availability publishedinthe Federal RegisteronJune2,2006forthisTS improvement, plant-specific verifications were performedasfollows:

1.Entergy Operations, Inc.commitstothe guidance of NUMARC93-01Section11,Revision2A,which provides guidance and detailsonthe assessment and managementofriskduring maintenance.2.Entergy Operations,Inc.willrevise procedures to ensure that the risk assessment and management process describedinNEI 04-08isused whenever a barrier is considered unavailableandthe requirements of LCO3.0.9aretobeapplied,in accordancewithanoverall configuration risk management program(CRMP)to ensure that potentially risk-significant configurationsresultingfrom maintenance and other operational activities are identified and avoided.3.3.PrecedentTheNRChas approved TSTF-427 editorial variations similar to those described in"Section2.2 Optional Changes and Variations"fora number of plants.1.LetterfromA Muiiiz (U.S.Nuclear Regulatory Commission)toJ.M.Davis(Detroit Edison Company),Fermi2-Issuance of Amendment RE: ConsolidatedLineItem Improvement Process (CLIIP)Application for Technical Specification Change (TSTF-427)toAddLimiting Condition for Operation(LCO)3.0.9 Regarding the UnavailabilityofBarriers(TACNo.MD4434),datedAugust 1,2007 (ADAMS Accession No.ML071490013).2.LetterfromP.S.Tam(U.S.

Nuclear Regulatory Commission)toT.J.O'Connor(NorthernStatesPower Company), Monticello Nuclear Generating Plant-Issuance of AmendmenttoAddNew Limiting Condition for Operation 3.0.9 Regarding UnavailabilityofBarriers(TACNo.MD9490),dated October 22, 2008 (ADAMS Accession No.ML082550109).

GNRO-2016/00051 Attachment 1 4.0 ENVIRONMENTAL EVALUATION Entergy Operations,Inc.hasreviewedthe environmentalevaluationincludedinthemodelsafety evaluation dated October3,2006aspartofthe Cl.ll P.Entergy Operations,Inc.hasconcludedthatthestaff'sfindingspresentedinthatevaluationare applicabletotheGrandGulf NuclearStationandtheevaluationishereby incorporatedbyreferenceforthisapplication.

Attachment 2 to GNRO-2016/00051 Proposed Technical Specification Changes (Marked-Up)

3.0 LIMITING

CONDITION FOR OPERATION CLCO)Leo 3.0.1 LCO 3.0.2 LCO 3.0.3 LCD 3.0.4 GRAND GULF ADp1 i cabi)i ty 3.0 Leos shall be met during the MODES 0 other specified conditions in the Applicability, ex ept as provided in LCO 3.0.2, LCO 3.0.7,LCO 3.0.8.Upon discovery of a failuretomeetan LCO, the Required Actions of the associated Conditions shallbemet, except as provided in LCO 3.0.5 and LCO 3.0.6.If the LCO ismetor is no longer applicable prior to expiration of the specified Completion Time(s), completion of the Required Action(s)is not required, unless otherwise stated.When an LCO is notmetand the associated ACTIONS are notmet,an associated ACTION is not provided, or if directed by the associated ACTIONS, the unit shall be placedina MODE or other specified conditioninwhich the LCO is not applicable.

Action shall be initiated within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to place the unit, as applicable, in: a.MODE 2 within 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />;b.MODE 3 within 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br />;and c.MODE 4 within 37 hours4.282407e-4 days <br />0.0103 hours <br />6.117725e-5 weeks <br />1.40785e-5 months <br />.Exceptions to this Specification are stated in the individual Specifications.

Where corrective measures are completed that permit operation in accordancewiththe LCO or ACTIONS, completion of the actions required by LCO 3.0.3 is not required.LCO 3.0.3 is only applicable in MODES1,2, and 3.When an LCO isnotmet, entry into a MODE or other specified condition in the Applicability shall only be made: a.When the associated ACTIONStobe entered permit continued operation in the MODE or other specified condition in the Applicability for an unlimited period of time;(continued)

Amendment No.++-+/--,-..l:li.

LCD Applicability 3.0 3.0 LCO APPLICABILITY (continued)

LCD 3.0.7 LCD 3.0.8 Special Operations LeOs in Section 3.10 allow specified Technical Specifications (TS)requirements tochangedto permit performance of special tests and operations.

Unless otherwise specified, all other 15 requirements remain unchanged.

Compliance with Special Operations LeOs is optional.'

When a Special Operations LCD is desiredtobe met but isnotmet,the ACTIONS of the Special Operations LCO shallbemet.When a Special Operations lCO is not desired tobemet, entry into a MODE or other specified condition in the Applicability shallonlybe made in accordance with the other applicable Specifications.

Whenoneor more required snubbers are unable to perform their associated support function(s), any affected supported LCOes)arerequired to be declarednotmet solely for this reason if risk is assessed and managed, and: a.the snubbersnotable to perform their associated support function(s) are associated with only one train or subsystemofa multiple train or subsystem supported system or are associated with a single train'or subsystem supported system and are able to perform their associated support function within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />;or b.the snubbers not able to perform their associated support functfon(s) are associatedmorethanone train or subsystem of a multiple train or subsystem supported system and are able to perform their associated support function withinhours.At theendof the specified period the required snubbersmustbe able to perform their associated support funct;on(s), or the affected supported systemLeO(s)shal1 be declarednotmet..GRANO GULF 3.0-3 Amendment No.

INSERT 1LCO3.0.9Whenoneormorerequired barriersareunabletoperformtheirrelated support function(s), any supportedsystemLCO(s)arenotrequiredtobe declarednotmetsolelyforthisreasonforupto30days providedthatatleastonetrainor subsystemofthesupportedsystem is OPERABLE and supportedbybarriers capableofprovidingtheirrelated support function(s),andriskis assessed and managed.This specificationmaybe concurrentlyappliedtomorethanonetrainorsubsystemofamultipletrainor subsystem supportedsystemprovidedatleastonetrainor subsystemofthe supportedsystemis OPERABLEandthebarrierssupportingeachofthesetrainsor subsystemsprovidetheirrelated support function(s) for different categories ofinitiatingevents.Forthe purposesofthis specification,theHigh PressureCoreSpraysystem,theReactorCoreIsolationCoolingsystem,andtheAutomatic DepressurizationSystemare considered independent subsystemsofasinglesystem.Iftherequired OPERABLEtrainor subsystem becomes inoperablewhilethis specificationisinuse,itmustberestoredto OPERABLEstatuswithin24hoursorthe provisionsofthis specificationcannotbeappliedtothetrainsor subsystems supportedbythebarriersthatcannotperformtheirrelated support function(s).Attheendofthe specifiedperiod,therequired barriersmustbeabletoperformtheirrelated support function(s)orthe supportedsystemLCO(s)shallbedeclarednotmet.

Attachment 3 to GNRO-2016/00051 Revised Technical Specification Pages (Clean)

LCO Applicability 3.0 3.0 LIMITING CONDITION FOR OPERATION (LCO)APPLICABILITY LCO 3.0.1 LCO 3.0.2 LCO 3.0.3 LCO 3.0.4 LCOs shallbemet during the MODES or other specified conditions in the Applicability, except as provided in LCO 3.0.2, LCO 3.0.7, LCO 3.0.8, and LCO 3.09.Upon discovery of a failure tomeetan LCO, the Required Actions of the associated Conditions shallbemet, except as provided in LCO 3.0.5 and LCO 3.0.6.If the LCO ismetor is no longer applicable prior to expiration of the specified Completion Time(s), completion of the Required Action(s)is not required, unless otherwise stated.When an LCO isnotmetand the associated ACTIONS are notmet,an associated ACTION is not provided, or if directed by the associated ACTIONS, the unit shall be placedina MODE or other specified conditioninwhich the LCO is not applicable.

Action shall be initiated within1hour to place the unit, as applicable, in: a.MODE 2 within 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />;b.MODE 3 within 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br />;and c.MODE 4 within 37 hours4.282407e-4 days <br />0.0103 hours <br />6.117725e-5 weeks <br />1.40785e-5 months <br />.Exceptions to this Specification are stated in the individual Specifications.

Where corrective measures are completed that permit operation in accordance with the LCO or ACTIONS, completion of the actions required by LCO 3.0.3 is not required.LCO 3.0.3 is only applicable in MODES1,2,and3.When an LCO is not met, entry into a MODE or other specified condition in the Applicability shall only be made: a.When the associated ACTIONS to be entered permit continued operation in the MODE or other specified condition in the Applicability for an unlimited period of time;(continued)

GRAND GULF 3.0-1 Amendment175.___

LCO Applicability 3.0 3.0 LCO APPLICABILITY (continued)

LCO 3.0.7 LCO 3.0.8 LCO 3.0.9 Special Operations LCOs in Section 3.10 allow specified Technical Specifications (TS)requirements tobechanged to permit performance of special tests and operations.

Unless otherwise specified, all other TS requirements remainunchanged.Compliance with Special Operations LCOs is optional.When a Special Operations LCO is desired to bemetbut is not met, the ACTIONS of the Special Operations LCD shallbemet.When a Special Operations LCO is not desired tobemet, entry into a MODE or other specified condition in the Applicability shall only be made in accordance with the other applicable Specifications.

When one or more required snubbers are unable to perform their associated support function(s), any affected supported LCO(s)are not required to be declarednotmet solely for this reason if risk is assessed and managed, and: a.the snubbers not able to perform their associated support function(s) are associated with only one train or subsystem of a multiple train or subsystem supported system or are associatedwitha single train or subsystem supportedsystemand are able to perform their associated support function within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />;or b.the snubbers not able to perform their associated support function(s) are associated with more than one train or subsystem of a multiple train or subsystem supportedsystemand are able to perform their associated support function within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.At the end of the specified period the required snubbersmustbe able to perform their associated support function(s), or the affected supported system LCO(s)shall be declared not met.When one or more required barriers are unable to perform their related support function(s), any supported system LCO(s)are not required to be declared not met solely for this reason for up to 30 days provided that at least one train or subsystem of the supported system is OPERABLE and supported by barriers capable of providing their related support function(s), and risk is assessed and managed.This specification may be concurrently applied to more than one train or subsystem of a multiple train or subsystem supported system provided at least one train or subsystem (continued)

GRAND GULF 3.0-3 Amendment No.lrt,175.___

LCD Applicability 3.0 3.0 LCD APPLICABILITY (continued)

LCD 3.0.9 of the supported system is OPERABLE and the barriers supporting each of these trains or subsystems provide their related support function(s) for different categories of initiating events.For the purposes of this specification, the High PressureCoreSpray system, the Reactor Core Isolation Coolingsystem,and-the Automatic Depressurization System are considered independent subsystems of a single system.If the required OPERABLE train or subsystem becomes inoperable while this specification is in use, itmustbe restored to OPERABLE status within24hoursor the provisions of this specificationcannotbe applied to the trains or subsystems supported by the barriers that cannot perform their related support function(s).

At the end of the specified period, the required barriersmustbe able to perform their related support function(s) or the supported system LCO(s)shall be declared not'met.(continued)

GRAND GULF 3.0-3a Amendment No.---I Attachment 4 to GNRO-2016/00051 Proposed Technical Specification Bases Pages (Marked-Up)

B 3.0 BASES LCOs LCO Applicability B 3.0 LIMITING CONDITION FOR OPERATION

{C!1JJ J LCO 3.0.1 through LCOestablish the general requirements applicable to all Specificationsandapply at all times, unless otherwise stated.LCO 3.0.1 LCO 3.0.2 LCD 3.0.1 establishes the Applicability statement within each individual Specification as the requirement for when the LCD is required tobemet(i.e., when the unit;sinthe MODES or other specified conditions of the Applicability statementofeach Specification).

LCD 3.0.2 establishes that upon discoveryofa failure tomeetan LCD, the associated ACTIONS shallbemet.The Completion Time ofeachRequired Action for an ACTIONS Condition is from the pointintime that an ACTIONS Condition is entered.The Required Actions establish those remedial measures thatmustbe taken within specified Completion Times when the requirementsofan LCD arenotmet.This Specification establishes that:a.Completionof the Required Actions within the specified Completion Times constitutes compliance with a Specification; andb.Completionof the Required Actions is not required when an LCD is met within the specified Completion Time, unless otherwise specified.

I There are two basic typesofRequired Actions.The first type of Required Action specifiesatime limitinwhich the LCD mustmet.Thistime limit is the Completion Time,to restore an inoperablesystemorcomponentto OPERABLE statusorto restore variables to within specified limits.If this typeofRequired Action is-not completed within theCompletionTime,ashutdown may be required to place the unitina MODE or conditioninwhich the Specification is not applicable.(Whether statedasa Required Action or not, correction of the entered Condition is an action that mayalwaysbe considered upon entering ACTIONS.)ThesecondtypeofRequiredAction specifies the remedial measures that permit continued operation of the (continued)

GRAND GULF B 3.0-1 BASES LCO 3.0.8 (continued)LCOApplicabilityB3.0 event that would require operation of the supported system occurring while the snubber(s) are not capable of performing their associated support function.LCO 3.0.8 requires that risk be assessed and managed.Industry and NRC guidance on the implementation of 10 CFR 50.65(a)(4)(the Maintenance Rule)does not address seismic risk.However, use of LCO 3.0.8 should be considered with respect to other plant maintenance activities, and integrated into the existing Maintenance Rule process to the extent possible so that maintenance on any unaffected train or subsystem is properly controlled, and emergent issues are properly addressed.

The risk assessment need not be quantified, but a qualitative awareness of the vulnerability of systems and components when one or more snubbers are not able to perform their associated support function.LCO 3.0.8 does not apply to non-seismic snubbers.The provisions of LCO 3.0.8 are not to be applied to supported TS systems unless the supported systems would remain capable of performing their required safety or support functions for postulated design loads other than seismic loads.The risk impact of dynamic loadings other than seismic loads was not assessed as part of the development of LCO 3.0.8., These shock-type loads include thrust loads, blowdown loads, water-hammer loads, steam-hammer loads, LOCA loads and pipe rupture loads.However, there are some important distinctions between non-seismic (shock-type) loads and seismic loads which indicate that, in general, the risk impact of the out-of-service snubbers is smaller forseismic loads for seismic loads.First, while a seismic load affects the entire plant, the impact of aseismic load is localized to a certain system or area of the plant.Second, although non-seismic shock loads may be higher in total force and the impact could be as much or more than seismic loads, generally they are of much shorter duration than seismic loads.Third, the impact ofseismic loads is more plant specific, and thus harder to analyze generically, than for seismic loads.For these reasons, every time LCO 3.0.8 is applied, at least one train of each system that is supported by the inoperable snubber(s) should remain capable of performing their required safety or support functions for postulated design loads other than seismic loads.GRAND GULFB3.0-9b INSERT 2 LCD 3.0.9 LCD 3.0.9 establishes conditions under which systems describedinthe Technical Specifications are consideredtoremain OPERABLE when required barriersarenot capable of providing their related support function(s).

Barriersaredoors,walls,floorplugs,curbs,hatches,installed structures or components, or otherdevices,not explicitly described in Technical Specifications, that support the performanceofthe safety functionofsystems describedinthe Technical Specifications.

This LCD states that the supportedsystemisnot consideredtobe inoperablesolelyduetorequired barriersnot'capable of performingtheirrelated support function(s) under the described conditions.

LCD 3.0.9allows30 days before declaring the supported system(s)inoperableandthe LCO(s)associatedwiththe supported system(s)notmet.A maximumtimeisplacedoneach useofthis allowance to ensurethatasrequired barriersarefoundorare otherwise made unavailable, theyarerestored.

However, the allowable durationmaybelessthanthe specified maximum timebasedontherisk assessment.Iftheallowedtimeexpiresandthe barriersareunabletoperformtheirrelated support function(s), the supported system'sLCO(s)mustbe declarednotmetandthe Conditions and Required Actions entered in accordancewithLCD3.0.2.

Thisprovisiondoesnotapplyto barriers which support ventilation systemsortofire barriers.The Technical Specifications for ventilation systems provide specific Conditions for inoperable barriers.Fire barriers are addressed by other regulatory requirements and associated plant programs.This provisiondoesnotapplyto barrierswhicharenotrequiredto support system OPERABILITY (see NRC Regulatory Issue Summary 2001-09,"ControlofHazard Barriers," datedApril2,2001).

The provisionsofLCD3.0.9are justified becauseofthelowrisk associated with required barriersnotbeing capable of performingtheirrelated support function.This provision is based on considerationofthefollowinginitiating event categories:*Lossof coolant accidents;*High energylinebreaks;

• Feedwaterlinebreaks;*Internal flooding;*External flooding;*Turbine missileejection;and

• Tornadoorhighwind.Therisk impactofthebarrierswhich cannotperformtheirrelated support function(s) must be addressed pursuanttotherisk assessment and managementprovisionofthe MaintenanceRule,10CFR50.65(a)(4),andthe associated implementation guidance, Regulatory Guide 1.182,"AssessingandManagingRiskBefore Maintenance Activities at Nuclear Power Plants." RegulatoryGuide1.182 endorses the guidanceinSection11of NUMARC 93-01,"Industry Guideline for Monitoring the Effectiveness of Maintenance at NuclearPowerPlants.

II This guidance providesforthe consideration of dynamic plant configuration issues, emergent conditions,andotheraspects pertinenttoplant operationwiththe barriersunableto perform their related support function(s).

These considerationsmayresultinrisk management and other compensatoryactionsbeingrequiredduringtheperiodthat barriersareunabletoperformtheirrelatedsupport function(s).LCO3.0.9maybeappliedtooneormoretrainsor subsystemsofasystem supported by barriersthatcannotprovidetheirrelated support functiorus),providedthatriskis

'assessed and managed (including considerationoftheeffectsonLargeEarlyReleaseandfromexternalevents).Ifapplied concurrentlytomorethanonetrainor subsystemofamultipletrainor subsystem supportedsystem,the barriers supportingeachofthesetrainsor subsystems must providetheirrelated support function(s) for different categoriesofinitiatingevents.Forexample,LCO3.0.9maybeappliedforupto30daysformorethanonetrainofamultipletrainsupportedsystemifthe affected barrierforonetrainprotects againstinternalfloodingandtheaffected barrierfortheothertrainprotects against tornadomissiles.Inthisexample,theaffected barriermaybethesamephysical barrierbutserve different protection functionsforeachtrain.TheHPCS(HighPressureCoreSpray)andRCIC (ReactorCoreIsolationCooling)systemsaresingletrainsystemsforinjecting makeup waterintothereactorduringan accident or transientevent.TheRCIC systemisnotasafetysystem,norrequiredtooperateduringatransient, therefore,itdoesnothavetomeetthe singlefailurecriterion.TheHPCSsystemprovides backupincaseofaRCICsystemfailure.TheADS (Automatic DepressurizationSystem)and low pressure ECCS coolantinjectionprovidethecorecoolingfunctionintheeventoffailureoftheHPCSsystem during an accident.Thus,forthe purposesofLCO3.0.9,theHPCSsystem,theRCICsystem,andtheADSare considered independent subsystemsofasinglesystemandLCO3.0.9canbeusedonthesesingletrainsystemsina manner similartomultipletrainor subsystem systems.IfduringthetimethatLCO3.0.9isbeingused,therequired OPERABLEtrainorsubsystem becomes inoperable,itmustberestoredto OPERABLEstatuswithin24hours.Otherwise,thetrain(s)orsubsystem(s)supported by barriersthatcannotperformtheirrelatedsupport function(s)mustbe declared inoperableandthe associatedLCOsdeclarednotmet.This24hourperiod providestimetorespondto emergent conditionsthatwouldotherwiselikelyleadtoentryintoLCO3.0.3andarapidplant shutdown,whichisnot justifiedgiventhelow probabilityofaninitiatingeventwhichwouldrequirethebarrier(s)notcapableof performingtheirrelated supportfunction(s).Duringthis24hourperiod,theplantrisk associatedwiththeexisting conditions is assessed and managed in accordancewith10CFR50.65(a)(4).

Attachment 5 to GNRO-2016/00051 Regulatory Commitments GNRO-2016/00051 Attachment 5Listof fllegulatory CommitmentThefollowingtableidentifiestheaction committedtobyEntergyinthisdocument.Any other statementsinthissubmittalareprovidedfor information purposesandarenot consideredtobe regulatory commitment.

Type Scheduled(CheckOne)

Commitment One-Time Continuing Completion Action Compliance Date Entergy Operations, Inc.commits to the guidance of NUMARC 93-01Section11,Revision2,which provides X guidance and detailsonthe assessment and managementofrisk during maintenance.

Entergy Operations, I ncowillrevise procedures to ensurethattherisk assessment and management process describedinNEI 04-08isused whenever a barrier is considered unavailableandthe requirements of XLCO3.0.9aretobeapplied,in accordancewithanoverallCRMPtoensurethat potentially risk-siqnificant configurations resulting from maintenance and other operational activities are identifiedandavoided.