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 POWERCOMPANY RICHMOND,VIRGINIA 23261 10CFR50.90 August 26,2021 U.S.Nuclear Regulatory Commission Serial No.: 20-385A Attention:

Document Control Desk NRA/DEA: RO Washington, DC20555-0001 Docket Nos.:50-338 50-339 License Nos.:NPF-4 NPF-7 VIRGINIA ELECTRIC ANDPOWER COMPANY NORTHANNAPOWERSTATIONUNITS1AND 2

SUPPLEMENT TOPROPOSED LICENSE AMENDMENT REQUEST TO CHANGEBATTERYSURVEILLANCE REQUIREMENTS Byletter dated December 17,2020(Agencywide Documents Access andManagement System(ADAMS)

Accession No.ML20352A394)

[Reference 1),Virginia Electric and PowerCompany(Dominion EnergyVirginia) requested changes totheTechnical Specifications (TS) forNorth AnnaPowerStation (NAPS)

Units 1and 2.Specifically, the proposed amendment revises NAPSTS3.8.4, "Electrical Power

Systems, DCSources Operating,"

Surveillance Requirements (SRs) 3.8.4.2 and3.8.4.5by adding new acceptance criteria foreachsafety-related battery thatspecify a total connection resistance value asestablished byNorth Annacalculations.

Theinter-cell connection resistance value of1.5E-4 Ohmcurrently specified inTS 3.8.4 isnon-conservative

ifall, oraconsiderable

number, oftheconnections arepostulated to beattheTSlimit

value, since theacceptable total battery connection resistance value wouldbeexceeded.

Thenewacceptance criteria will confirm thatthetotal battery connection resistance iswithin pre-established limits andensures that thebatteries will perform their specified safety function bymaintaining required battery terminal voltage underdesigned load conditions.

Following submittal oftheDecember 17,2020license amendment request (LAR),

itwas identified thattheproposed TS SRsestablished unintentional conditions requiring verification ofthenewacceptance criteria.

Asaresult, therevised TSpagesprovided in theattachment ofthis LARSupplement supersede Attachments 2and3oftheDecember 17,2020LARintheir entirety.

Theinformation provided inthis LARSupplement doesnotaffect theconclusions ofthe no significant hazards evaluation andtheenvironmental considerations evaluation

Serial Nox20-385A Docket Noss50-338/339 Page2of3 transmitted bytheDecember 17,2020letter.

Ifyouhave any questions orrequire additional information, please contact Erica Combs at(804) 273-3386.

Respectfully, MarkD.Sartain VicePresident

- Nuclear Engineering and FleetSupport COMMONWEALTH OFVIRGINIA

))

COUNTYOFHENRICO

)

Theforegoing document wasacknowledged before me,in and fortheCounty andCommonwealth aforesaid, today byMr.MarkD.Sartain, whoisVice President Nuclear EngineeringandFleet

Support, ofVirginia Electric andPowerCompany.Hehasaffirmed beforemethat heisduly authorized toexecute andfile theforegoing document inbehalf of that company, andthat the statements inthedocument aretrue tothebest ofhisknowledge and belief.

Acknowledged before methis$b dayof

, 2021 MyCommission Expires:

'3~

4 Kathryn HillBarret Notary Public Commonwealth ofVirginia Reg.No.7905256 Notary Public MyCommission Expires January31, 2024 Commitments contained inthis letter:

None

Attachment:

Proposed Technical Specifications Pages

References:

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

dated December 17,2020.(Agencywide Documents AccessandManagement System(ADAMS)

Accession No.ML20352A394)

Serial No.:

20-385A Docket Nos.:

50-338/339 Page3of3 cc:

U.S.NuclearRegulatory Commission

- Region II Marquis OneTower 245 Peachtree Center

Avenue, NESuite 1200

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 Manager North Anna PowerStation U.S.Nuclear Regulatory Commission OneWhite Flint North MailStop09E-3 11555Rockville Pike Rockville, Maryland 20852-2738 Mr.JohnKlos NRCProject Manager

- Surry PowerStation U.S.Nuclear Regulatory Commission OneWhite Flint North MailStop09E-03 11555Rockville Pike Rockville, Maryland 20852-2738 NRCSenior Resident Inspector North AnnaPowerStation

Serial No.:

20-385A Docket Nos.:

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

NorthAnnaPowerStation Units 1and2

DCSources-0perating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.2 Verify foreachrequired Station andEDG Inaccordance

battery, thereisnovisible corrosion at withthe battery terminalsandconnectors.

Surveillance Frequency OR Control Program sVerify battery connection resistance is 5 1.5E-4 ohm forinter-cell connections, 5 1.5E-4ohm for inter-rack connections, 5 1.5E-4 ohm for inter-tier connections, and5 1.5E-4ohm for terminal

. connections.

AND Verify' total connection resistance for eachStation battery isless than orequal tothevaluelisted below.

Wotal Battery Connection Resistance

'= + " /Station BatteryMaximumAllowable Total Battery Connection Resistance

' 1-I

, 1-Ill, 2-I

, 2-III52.5E-3 ohm 1-11 5o.9E-3 ohm 1-IV,2.-II,2-IV 51.5E-3ohm SR 3.8,.4.:3

- /Verify foreachrequired Station andEDG Inaccordance

battery, cells,cellplates, andracks withthe shownovisual indication ofphys'icalSurveillance damageorabnormal deterioration that Frequency coulddegrade battery performance.

Control Program SR 3.8.4.4 Foreachrequired Station andEDGbattery,Inaccordance removevisible terminal corrosion, verifywiththe battery celltocellandterminal Surveillance connections arecleanandcoated with Frequency anti-corrosion material.

Control Program North AnnaUnits1 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 Verifytotal connection resistance for eachStation batteryis less thanorequal stothevaluelisted below.

^

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

=

1-11

$0.9E-3 ohm 1-IV, 2-II, 2-IV

$1,5E-3ohm SR 3.8.4.6

- Verifyeachrequired 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 Control Program s

SR 3.8.4.7-Verify eachrequired EDGbattery charger Inaccordance 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 Control Program North AnnaUnits1 and2 3.8.4-4 Amendments

---/---