ML21238A255

Supplement to Proposed License Amendment Request to Change Battery Survillance Requirements

ML21238A255
Person / Time
Site:	North Anna
Issue date:	08/26/2021
From:	Mark D. Sartain Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
20-385A
Download: ML21238A255 (6)

Text

VIRGINIAELECTRIC AND POWER COMPANY RICHMOND,VIRGINIA23261 10CFR50.90 August 26,2021 U.S.NuclearRegulatory Commission SerialNo.: 20-385A Attention:

Document Control Desk NRA/DEA: RO Washington,DC20555-0001 Docket Nos.:50-338 50-339 License Nos.: NPF-4 NPF-7 VIRGINIAELECTRIC ANDPOWER COMPANY NORTHANNAPOWER STATION UNITS 1AND 2 SUPPLEMENT TOPROPOSED LICENSE AMENDMENT REQUEST TO CHANGE BATTERY SURVEILLANCE REQUIREMENTS Byletter dated December 17,2020 (Agencywide Documents Access andManagement System(ADAMS) Accession No.ML20352A394) [Reference 1),Virginia Electric and PowerCompany (Dominion Energy Virginia) requested changes totheTechnical (TS)

Specifications for NorthAnnaPower Station(NAPS) Units 1and 2.Specifically, the amendment proposed revisesNAPSTS3.8.4, "ElectricalPower Systems, DCSources -

j Operating,"

Surveillance Requirements (SRs) 3.8.4.2 and 3.8.4.5by adding new l acceptancecriteria foreachsafety-related battery that specify a total connection j resistance value asestablished byNorth Annacalculations.

Theinter-cell connection resistance value of1.5E-4 Ohmcurrently specified inTS 3.8.4 isnon-conservativeifall,ora considerable number, oftheconnections are postulated to beattheTS limitvalue, sincetheacceptable totalbattery connection resistancevalue wouldbeexceeded. Thenewacceptance criteriawillconfirm that thetotal battery resistance connection iswithinpre-established limitsandensures that thebatteries will perform theirspecified safetyfunction bymaintaining required battery terminalvoltage  !

underdesignedload conditions. l Following submittal oftheDecember 17, 2020license amendment request (LAR), itwas identified thattheproposed TS SRs established unintentional conditions requiring verification ofthenewacceptance criteria.Asa result, therevised TSpages provided in theattachment ofthis LARSupplement supersede Attachments 2 and3ofthe December  !

17,2020LAR their in entirety.

Theinformation provided inthisLARSupplement doesnotaffect theconclusions ofthe hazards no significant evaluation andtheenvironmental considerations evaluation ,

Nox20-385A Serial Docket Noss 50-338/339 Page2 of3 transmitted bythe December 17,2020letter.

If youhave any questions orrequire additionalinformation, please contact Erica Combs at(804) 273-3386.

Respectfully, Mark D.Sartain Vice President -

NuclearEngineering and Fleet Support COMMONWEALTH OFVIRGINIA )

)

COUNTY OFHENRICO )

Theforegoing document wasacknowledged before me,in and for theCounty andCommonwealth aforesaid, todaybyMr.MarkD.Sartain, whoisVicePresident -

Nuclear Engineering andFleet Support, ofVirginia Electric andPower Company.Hehasaffirmed beforeme that heisduly authorized toexecuteandfiletheforegoing document inbehalf of that company, andthat the statements inthe documentaretrue tothe best ofhisknowledge and belief.

Acknowledged beforemethis $b dayof , 2021 MyCommission Expires:'3~ 4 Hill Barret Kathryn Notary Public Commonwealth ofVirginia No.

Reg. 7905256 Notary Public MyCommission ExpiresJanuary31, 2024 Commitments contained inthisletter:None

Attachment:

Proposed Technical Specifications Pages

References:

1 Letter fromDominion Energy Virginia (Serial No.: 20-385) toNRC,"Proposed License Amendment Request toChange Battery Surveillance Requirements,"

dated December 17,2020. (Agencywide Documents Access andManagement System (ADAMS) Accession No.ML20352A394)

Serial No.:

20-385A Nos.:

Docket 50-338/339 Page3 of3 cc: U. S.NuclearRegulatory Commission-II Region Marquis OneTower 245 Peachtree Center Avenue, NESuite1200 Atlanta, Georgia 30303-1257 State Health Commissioner Virginia Department ofHealth JamesMadison Building -

7th flOOr 109Governor Street Suite 730 Richmond, Virginia 23219 Mr.G.Edward Miller NRCSenior Project ManagerNorth Anna PowerStation U.S.Nuclear Regulatory Commission OneWhite FlintNorth Mail Stop 09E-3 11555 Rockville Pike Rockville, Maryland 20852-2738 Mr. John Klos NRCProject ManagerSurry-Power Station U.S.Nuclear Regulatory Commission OneWhite FlintNorth Mail Stop 09E-03 11555 Rockville Pike Rockville, Maryland 20852-2738 NRCSenior Resident Inspector North AnnaPower Station

Serial No.:

20-385A Nos.:

Docket 50-338/339 Attachment PROPOSED TECHNICALSPECIFICATION PAGES Virginia andPowerCompany Electric Energy (Dominion Virginia)

North AnnaPowerStation Units 1 and2

DCSources-0perating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.2 Verify foreachrequired StationandEDG Inaccordance battery, there isno visible corrosion at withthe battery terminalsandconnectors. Surveillance Frequency OR Control Program sVerify battery connection resistance is 5 1.5E-4 ohm for inter-cell connections, 5 1.5E-4ohm for inter-rack connections, 5 1.5E-4 ohm for inter-tier connections, and 5 1.5E-4ohm for terminal connections.

AND Verify' total connection resistance for each Station battery isless than orequal tothevalue listed below.

Wotal Connection Battery Resistance

'= + " /Station Battery Maximum Allowable TotalBattery Connection Resistance

1-I

, 1-Ill,2-I2-III5 2.5E-3

, ohm 1-11 5 o.9E-3ohm 1-IV,2.-II,2-IV 51.5E-3ohm SR 3.8,.4.:3/Verify foreachrequired andEDG Inaccordance Station battery, cells, cell plates, andracks withthe showno visual indication ofphys'icalSurveillance damage or abnormal deterioration that Frequency could degrade battery performance. Control Program SR 3.8.4.4 Foreach required Station andEDGbattery,In accordance remove visible terminal verify withthe corrosion, battery cellto cellandterminal Surveillance connections areclean andcoated with Frequency anti-corrosion material. Control Program North AnnaUnits 1 and2 3.8.4-3 ---/---

Amendments

DCSources-0perating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.5 Verify foreachrequired Station andEDG Inaccordance battery, connection resistance is withthe 5 1.5E-4 ohmforinter-cell connections,Surveillance 5 1.5E-4 ohm forinter-rackconnections,Frequency 5 1.5E-4 ohm forinter-tier connections,Control Program and5 1.5E-4 ohm forterminal connections A.ED Verify total connection resistance for each Station battery is less than orequal stothevalue listed below.

^

Total Battery ConnectionResistance Station Battery Maximum Allowable Total Battery Connection Resistance 1-I, 1-Ill,2-l, 2-lil$ 2,5E-3 ohm

=

1-11 $ 0.9E-3 ohm 2-II, 1-IV, 2-IV $ 1,5E-3ohm SR 3.8.4.6 Verify eachrequired Station battery Inaccordance

charger supplies 2 270ampsat2 125V withthe for;24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Surveillance Frequency ControlProgram s SR 3.8.4.7-Verify eachrequired EDGbattery charger In accordance supplies 2 10ampsat2 125V for2 withthe 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Surveillance Frequency ControlProgram North AnnaUnits 1 and2 3.8.4-4 Amendments---/---