GNRO-2017/00027, Entergy Operations Inc. Intent to Submit a License Amendment Request to Implement Tornado Missile Risk Evaluator and Request for Pilot Plant Status: Difference between revisions

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GNRO-2017/00027April26,2017 U.S.Nuclear Regulatory Commission Attn: DocumentControlDesk Washington,DC20555-0001 Entergy Operations, Inc.P.O.Box756PortGibson,MS39150EricA.LarsonSiteVicePresidentTel.(601)437-7500
~Entergy                                                                        Entergy Operations, Inc.
P. O. Box 756 Port Gibson, MS 39150 Eric A. Larson Site Vice President Tel. (601) 437-7500 GNRO-2017/00027 April 26, 2017 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001


==SUBJECT:==
==SUBJECT:==
Entergy Operations Inc. Intent to Submit a License Amendment Request to Implement Tornado Missile Risk Evaluator and Request for Pilot Plant Status Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29


==DearSirorMadam:==
==Dear Sir or Madam:==


Entergy OperationsInc.Intentto SubmitaLicense AmendmentRequestto Implement TornadoMissileRisk Evaluator and RequestforPilotPlant StatusGrandGulf NuclearStation,Unit1DocketNo.50-416LicenseNo.NPF-29Thisletteristoinformthe Nuclear Regulatory Commission(NRC)ofEntergy Operations Inc.(Entergy)intenttohavetheGrand Gulf NuclearStation(GGNS)Unit1 becomeapilotplantfortheuseofa risk-informed methodologyknownasthe TornadoMissileRisk Evaluator (TMRE).TMREwillbeusedto demonstrate tornado missile protection compliance.Aspartofthepilotprogram,Entergywillsubmitalicense amendmentrequestforapprovaltouseTMREatGGNSUnits1.The Nuclear Energy Institute(NEI)andthe industryhavebeen developinganew methodologytoevaluatetherisk associated with tornadomissileson identified unprotected components.TMREisanew methodologyasdefinedin10CFR50.59,requiringNRCpriorreviewandapprovalona plant-specific basis.Licenseeswouldbeabletosubmitalicense amendmentrequesttouseTMREandtobringthese unprotected components into tornado missile protection complianceifNRC approves the submitted request.ThepurposeofTMREisto presenttheNRCwitha RegulatoryGuide(RG)1.174 risk-informedoptionfor evaluatingtheriskposedby tornadomissilesatanysiteand determine whetheradditionalphysical protection is warranted.TheneedforTMRE originatedwithNRC's issuance of Regulatory Issue Summary(RIS)2015-06,which informed licenseesofseveral instances ofplantsthatwereidentifiedasnotbeingin conformancewiththeir tornadomissilelicensingbasis.
This letter is to inform the Nuclear Regulatory Commission (NRC) of Entergy Operations Inc.
This risk-informed methodologymaybeaplatformforresolvinglowrisk complianceissuesand improve risk-informed regulations.
(Entergy) intent to have the Grand Gulf Nuclear Station (GGNS) Unit 1 become a pilot plant for the use of a risk-informed methodology known as the Tornado Missile Risk Evaluator (TMRE).
GNRO-2017/00027Page2of2Entergyrequeststhatthereviewfees associatedwiththeNRC evaluationofthislicense amendmentrequestbewaived pursuantto10CFR170.11onthebasisthattherequestistoassistin developing NRC regulatory guidance to endorse implementationofTMREin accordancewith10CFR170.11(b).Itis Entergy's understandingthatthefee waiverwouldbeapplicabletothe completeNRCreviewofaGGNSlicense amendment request.Thecurrenttargetdateforthis submittalis4th quarter2017.Entergy respectfullyrequestsadecisionontherequestforpilotplantstatusandfee waiverassoonas practicable to supporttimelyand efficient preparationofthelicense amendmentrequest.Thisletter containsnoNRCcommitments.Ifyouhaveany questions, please contactJamesNadeauat 601-437-2103.
TMRE will be used to demonstrate tornado missile protection compliance. As part of the pilot program, Entergy will submit a license amendment request for approval to use TMRE at GGNS Units 1.
Sincerely,EricA.LarsonSiteVice PresidentGrandGulf Nuclear Station EAL/ram cc: U.S.Nuclear Regulatory Commission A TIN:Mr.SivaLingam, NRR/DORL (w/2)MailStopOWFN/8B111555RockvillePikeRockville,MD 20852-2738U.S.Nuclear Regulatory CommissionATTN:Mr.KrissKennedy, NRR/DORL (w/2)MailStopOWFN8B1 Washington,DC20555-0001 NRC Senior Resident InspectorGrandGulf Nuclear StationPortGibson,MS39150}}
The Nuclear Energy Institute (NEI) and the industry have been developing a new methodology to evaluate the risk associated with tornado missiles on identified unprotected components.
TMRE is a new methodology as defined in 10 CFR 50.59, requiring NRC prior review and approval on a plant-specific basis. Licensees would be able to submit a license amendment request to use TMRE and to bring these unprotected components into tornado missile protection compliance if NRC approves the submitted request.
The purpose of TMRE is to present the NRC with a Regulatory Guide (RG) 1.174 risk-informed option for evaluating the risk posed by tornado missiles at any site and determine whether additional physical protection is warranted. The need for TMRE originated with NRC's issuance of Regulatory Issue Summary (RIS) 2015-06, which informed licensees of several instances of plants that were identified as not being in conformance with their tornado missile licensing basis.
This risk-informed methodology may be a platform for resolving low risk compliance issues and improve risk-informed regulations.
 
GNRO-2017/00027 Page 2 of 2 Entergy requests that the review fees associated with the NRC evaluation of this license amendment request be waived pursuant to 10 CFR 170.11 on the basis that the request is to assist in developing NRC regulatory guidance to endorse implementation of TMRE in accordance with 10 CFR 170.11 (b). It is Entergy's understanding that the fee waiver would be applicable to the complete NRC review of a GGNS license amendment request.
The current target date for this submittal is 4 th quarter 2017. Entergy respectfully requests a decision on the request for pilot plant status and fee waiver as soon as practicable to support timely and efficient preparation of the license amendment request. This letter contains no NRC commitments. If you have any questions, please contact James Nadeau at 601-437-2103.
Sincerely, Eric A. Larson Site Vice President Grand Gulf Nuclear Station EAL/ram cc:
U.S. Nuclear Regulatory Commission ATIN: Mr. Siva Lingam, NRR/DORL (w/2)
Mail Stop OWFN/8 B1 11555 Rockville Pike Rockville, MD 20852-2738 U. S. Nuclear Regulatory Commission ATTN: Mr. Kriss Kennedy, NRR/DORL (w/2)
Mail Stop OWFN 8 B1 Washington, DC 20555-0001 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150}}

Latest revision as of 05:20, 30 October 2019

Entergy Operations Inc. Intent to Submit a License Amendment Request to Implement Tornado Missile Risk Evaluator and Request for Pilot Plant Status
ML17116A579
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 04/26/2017
From: Emily Larson
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2017/00027
Download: ML17116A579 (2)
v • d • e


Text

~Entergy Entergy Operations, Inc.

P. O. Box 756 Port Gibson, MS 39150 Eric A. Larson Site Vice President Tel. (601) 437-7500 GNRO-2017/00027 April 26, 2017 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

SUBJECT:

Entergy Operations Inc. Intent to Submit a License Amendment Request to Implement Tornado Missile Risk Evaluator and Request for Pilot Plant Status Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29

Dear Sir or Madam:

This letter is to inform the Nuclear Regulatory Commission (NRC) of Entergy Operations Inc.

(Entergy) intent to have the Grand Gulf Nuclear Station (GGNS) Unit 1 become a pilot plant for the use of a risk-informed methodology known as the Tornado Missile Risk Evaluator (TMRE).

TMRE will be used to demonstrate tornado missile protection compliance. As part of the pilot program, Entergy will submit a license amendment request for approval to use TMRE at GGNS Units 1.

The Nuclear Energy Institute (NEI) and the industry have been developing a new methodology to evaluate the risk associated with tornado missiles on identified unprotected components.

TMRE is a new methodology as defined in 10 CFR 50.59, requiring NRC prior review and approval on a plant-specific basis. Licensees would be able to submit a license amendment request to use TMRE and to bring these unprotected components into tornado missile protection compliance if NRC approves the submitted request.

The purpose of TMRE is to present the NRC with a Regulatory Guide (RG) 1.174 risk-informed option for evaluating the risk posed by tornado missiles at any site and determine whether additional physical protection is warranted. The need for TMRE originated with NRC's issuance of Regulatory Issue Summary (RIS) 2015-06, which informed licensees of several instances of plants that were identified as not being in conformance with their tornado missile licensing basis.

This risk-informed methodology may be a platform for resolving low risk compliance issues and improve risk-informed regulations.

GNRO-2017/00027 Page 2 of 2 Entergy requests that the review fees associated with the NRC evaluation of this license amendment request be waived pursuant to 10 CFR 170.11 on the basis that the request is to assist in developing NRC regulatory guidance to endorse implementation of TMRE in accordance with 10 CFR 170.11 (b). It is Entergy's understanding that the fee waiver would be applicable to the complete NRC review of a GGNS license amendment request.

The current target date for this submittal is 4 th quarter 2017. Entergy respectfully requests a decision on the request for pilot plant status and fee waiver as soon as practicable to support timely and efficient preparation of the license amendment request. This letter contains no NRC commitments. If you have any questions, please contact James Nadeau at 601-437-2103.

Sincerely, Eric A. Larson Site Vice President Grand Gulf Nuclear Station EAL/ram cc:

U.S. Nuclear Regulatory Commission ATIN: Mr. Siva Lingam, NRR/DORL (w/2)

Mail Stop OWFN/8 B1 11555 Rockville Pike Rockville, MD 20852-2738 U. S. Nuclear Regulatory Commission ATTN: Mr. Kriss Kennedy, NRR/DORL (w/2)

Mail Stop OWFN 8 B1 Washington, DC 20555-0001 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150

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