NL-14-0753, Cycle 19 Core Operating Limits Report

Cycle 19 Core Operating Limits Report

ML14134A588
Person / Time
Site:	Vogtle
Issue date:	05/13/2014
From:	Pierce C Southern Co, Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-14-0753
Download: ML14134A588 (16)

Text

Charles R.Pierce Regulatory Affairs Director MAY13 2014 Docket Nos.: 50-424 Southern Nuclear Operating Company, Inc.40 Inverness Center Parkway Post Office Box 1295 Birmingham,AL35201 Tel 205.992.7872 Fax 205,992.7601U.S.Nuclear Regulatory Commission ATTN: Document Control Desk Washington,D.C.20555-0001 Vogtle Electric Generating Plant Unit 1 Cycle 19 Core Operating Limits Report Ladies and Gentlemen:

NL-14-0753 In accordance with Technical Specification 5.6.5.d, Southern Nuclear Operating Company submits the enclosed Core Operating Limits Report(COLR)forVogtle Electric Generating Plant (VEGP)Unit1 Cycle 19, Version 1.This letter containsnoNRC commitments.Ifyou have any questions, please contact Ken McElroy at (205)992-7369.Respectfully submitted.

C.R.Pierce Regulatory Affairs Director CRP/GLS/

Enclosure:

Core Operating Limits Report,VEGPUnit1Cycle 19, Version 1 U.S.Nuclear Regulatory Commission NL-14-0753 Page 2 Southern Nuclear Operating CompanyMr.S.E.Kuczynski, Chairman, President&CEOMr.D.G.Bost, Executive Vice President&Chief Nuclear OfficerMr.T.E.Tynan, Vice President-Vogtle1&2Mr.B.L Ivey, Vice President-Regulatory AffairsMr.D.R.Madison, Vice President-Fleet OperationsMr.B.J.Adams, Vice President-EngineeringMr.S.C.Waldrup, Regulatory Affairs Manager-Vogtle RType: CVC7000 U.S.Nuclear Regulatory CommissionMr.V.M.McCree, Regional AdministratorMr.R.E.Martin,NRR Senior Project Manager-Vogtle 1&2Mr.L.M.Cain, Senior Resident Inspector-Vogtle1&2 Vogtle Electric Generating Plant Unit 1 Cycle 19 Core Operating Limits Report Enclosure Core Operating Limits Report, VEGP Unit 1 Cycle 19, Version 1 VOGTLE ELECTRIC GENERATING PLANT (VEGP)UNIT1CYCLE 19 CORE OPERATING LIMITS REPORT Version 1 February 2014 Westinghouse Non-ProprietaryClass3 APPENDIX A VOGTLE ELECTRIC GENERATINGPLANT(VEGP)

UNIT1CYCLE 19 CORE OPERATING LIMITS REPORT (COLR)Version 1 February 2014 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 1.0 CORE OPERATING LIMITS REPORTThisCore OperatingLimitsReport(COLR)forVEGPUnit1Cycle 19hasbeen prepared in accordancewiththerequirements ofTechnicalSpecification5.6.5.

The TechnicalRequirementaffectedbythisreportislistedbelow:

13.1.1 SHUTDOWN MARGIN-MODES 1 and 2 The TechnicalSpecificationsaffectedbythisreportarelistedbelow:

3.1.1 SHUTDOWN MARGIN-MODES3,4 and 5 3.1.3 Moderator Temperature Coefficient 3.1.5 Shutdown Bank Insertion Limits 3.1.6 Control Bank Insertion Limits 3.2.1HeatFluxHotChannelFactor-Fq(Z)3.2.2 Nuclear Enthalpy Rise Hot Channnel Factor-f'^ah 3.2.3 Axial Flux Difference 3.9.1 Boron Concentration Page 1 of 11 CORE OPERATING LMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 2.0 OPERATING LIMITSThecycle-specificparameterlimitsforthespecificationslistedinSection1.0arepresentedinthefollowingsubsections.TheselimitshavebeendevelopedusingNRC-approvedmethodologiesincludingthosespecifiedin TechnicalSpecification5.6.5.

2.1 SHUTDOWN MARGIN-MODES1and2 (Technical Requirement 13.1.1)2.1.1TheSHUTDOWNMARGINshallbegreaterthanorequalto 1.30 percent Ak/k.2.2 SHUTDOWN MARGIN-MODES 3.4 and 5 (Specification 3.1.n 2.2.1 The SHUTDOWNMARGINshallbegreaterthanorequaltothelimitsshowninFigures 1 and 2.2.3 Moderator Temperature Coefficient (Specification 3.1.3)2.3.1 The Moderator Temperature Coefficient (MTC)limitsare:

The BOL/ARO/HZP-MTC shall be less positive than+0.7 x 10"^Ak/k/°F for powerlevelsupto70%RTPwithalinearrampto0 Ak/k/°F at 100%RTP.The EOL/ARO/RTP-MTC shall be less negative than-5.50 x 10"^Ak/k/°F.'2.3.2 The MTC Surveillance limits are;The300ppm/ARO/RTP-MTCshouldbelessnegativethanorequalto

-4.75 X 10-" Ak/k/°F.'The 60 ppm/ARO/RTP-MTC should be less negative than-5.35 x 10"^Ak/k/°F.'where:BOLstandsfor Beginning ofCycleLife ARO stands for All Rods Out HZP stands for Hot Zero THERMAL POWEREOLstandsforEnd ofCycleLife RTP stands for RATED THERMAL POWER'Applicable for full-power T-average of 584.1 to 587.1°F, Page2of11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 ShutdownBankInsertionLimits(Specification3.1.5) 2.4.1 The shutdownbanksshallbe withdrawntoapositiongreaterthanorequalto225steps.ControlBankInsertionLimits (Specification 3.1.6)2.5.1The controlrodbanksshallbelimitedin physical insertionasshownin Figure 3.HeatFluxHotChannelFactor-Fn/Zt (Specification 3.2.1)2.6.1 Fo(Z)<-5 K(Z)for?>0.5 Fo(Z)<-^K(Z)for P<0.5 where:P=-THERMAL POWER RATED THERMAL POWER 2.6.2 F^'"'=2.502.6.3K(Z)isprovidedin Figure 4.KiZ)2.6.4 Fo(Z)<-2 IlJ.for P>0.5P-W{Z)F^"^-KCZ)Fo(Z)<-^forP50.50.5-W^Z)2.6.5W(Z)valuesareprovidedinTable2.2.6.6The Fq(Z)penalty factors are provided in Table 1.Page 3 of 11 CORE OPERATTNG LIMITS REPORT.VEGP UNIT 1 CYCT.F.192.7NuclearEnthalpyRiseHotChannelFactor-F(Specification3.2.2) 2.7.1 S Fi"(I+where:P=THERMAL POWER RATED THERMAL POWER 2.7.2 F^'-=\.65 2.1.3 PF^=0.3 FEBRUARY 2014AxialFlux Difference (Specification 3.2.3)2.8.1 The Axial Flux Difference (AFD)Acceptable OperationLimitsare providedinFigure5.

Boron Concentration (Specification 3.9.1)2.9.1 The boron concentration shall be greater than or equal to 1880 ppm.^^Thisconcentrationboundsthecondition of keii^0.95(allrodsinlessthemostreactiverod)andsubcriticality(allrodsout)overtheentirecycle.This concentrationincludesadditionalboronto address uncertainties and B'depletion.

Page 4 of 11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 Table 1 Fq(Z)penalty factor Cycle Bumup (MWD/MTU)Fq(Z)PenallyFactor 1.0348 1.0391 1.0417 1.0423 1.0410 1.0366 1.0308 1.0248 1.0200 1.0200 1.0204 1.0262 1.0261 1.0244 1.0214 1.0200 FEBRUARY 2014 Notes:1.ThePenalty Factor,tobe appliedtoFq(Z)in accordancewithSR3.2.1.2,isthe maximum factor by which Fq(Z)is expected to increase overa39 EFPD interval (surveillance interval of 31 EFPD plusthemaximum allowableextensionnottoexceed25%

of the surveillanceintervalperSR3.0.2)startingfromthebumupatwhichtheFq(Z)was determined.2.Linearinterpolationisadequateforintermediatecyclebumups.3.Forallcycle burnupsoutsidetherangeofthetable,a penallyfactorof 1.020shallbe used.Pages of 11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 Axial Point 57-61 Elevation (feet)12.072-11.267 11.066 10.865 10.664 10.462 10.261 10.060 9.859 9.658 9,456 9.255 9.054 8.853 8.652 8.450 8.249 8.048 7.847 7.646 7.444 7.243 7.042 6.841 6.640 6.438 6.237 6.036 5.835 5.634 5.432 5.231 5.030 4.829 4.628 4.426 4.225 4.024 3.823 3.622 3.420 3.219 3.018 2.817 2.616 2.414 2.213 2.012 1.811 1.610 1.408 1.207 1.006 0.805-0.000 Table 2 RAOC wrz)150 MWD/MTU 1.0000 1.3172 13162 1.3018 1.2808 1.2615 1.2467 1.2503 1.2444 L2373 1.2278 1.2168 1.2020 1.1893 1.1900 1.1889 1.1918 1.1940 1.1935 1.1914 1.1867 1.1802 1.1724 1.1633 1.1529 1.1452 1.1401 1.1344 1.1321 1.1309 1.1317 1.1386 1.1477 1.1561 1.1640 1.1710 1.1770 1.1826 1.1872 1.1925 1.1985 1.2057 1.2190 1.2337 1.2476 1.2616 1.2755 1.2893 1.3024 1.3149 1.3269 1.3380 1.0000 3000 MWD/MTU 1.0000 1.3495 1.3440 1.3350 1.3167 1.2912 1.2683 1.2431 1.2130 1.1979 1.1893 1.1763 1.166Z 1.1670 1.1724 1.1761 1.1783 1.1780 1.1761 1.1728 I.I674 1.1604 1.1523 1.1459 1.1393 1.1326 1.1279 1.1252 1.1225 1.1258 1.1378 1.1484 1.1587 1.1683 1.1775 1.1856 1.1930 1.1994 1.2065 1.2159 1.2241 1.2377 1.2562 1.2794 1.3058 1.3328 1.3595 1.3858 1.4105 1.4336 1.4550 1.4742 l.OOOO Top and Bottom 5 Points Excluded per Technical Specification B3.2.1.12000 MWD/MTU 1.0000 1.3279 1.3244 1.3164 I.30S1 1.2919 1.2775 1.2614 1.2438 1.2384 1,2286 1.2165 1.2092 1.2141 1.2230 1.2290 1.2332 1.2344 1.2336 1.2315 1.2259 1.2178 1.2083 1.1988 1.1896 1.1801 1.1696 1.1608 1.1560 1.1590 1.1643 1.1706 1.1753 1.1790 1.1815 1.1829 1.1833 1.1822 1.1795 1.1763 1.1722 I.I765 1.1889 1.2020 1.2149 1.2279 1.2399 1.2514 1.2627 1.2737 1.2843 1.2943 1.0000 FEBRUARY 20 4 20000 MWD/MTU 1.0000 1.2728 1.2665 1.2561 1.2438 1.2294 1.2189 1.2150 IJi096 1.2144 1.2272 1.2359 1.2397 1.2426 1.2438 1.2500 1.2591 1.2670 1.2800 1.2895 1.2944 1.2950 1.2931 1.2890 1.2819 1.2719 1.2596 1.2478 1.2400 1.2349 1.2349 1.2348 1.2344 1.2333 1.2302 1.2254 1.2191 1.2100 1.1985 1.1861 1.1765 1.1776 1.1890 1.2019 1.2147 1.2275 1.2386 1.2491 1.2601 1.2714 1.2828 1.2945 l.OOOOTheseW(Z)valuesareconsistentwithFigure5,andarevalidover tlie HFP Tavg temperaturerangefrom 584.1 to 587.1°F.Page 6 of 11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 FIGURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES3AND4 (FOUR LOOPS FILLED AND VENTEDANDAT LEAST ONE REACTOR COOLANT PUMP RUNNING)"S 3-°O 2.0 g m ACCEPTABLE OPERATING REGION (2400, 3.lb)I REQUIRED SHUTDOWN MARGIN (lioo, i.2b)UNACCEPTABLE OPERATING REGION (65d, 1.3^0)50010001500RCSBORON CONCENTRATION (ppm)Page?of 11 ACCEPTABLE OPERATING REGION REQUIRED SHUTDOWN MARGIN RCS BO 1250, a.8B)0 200 N (ppm)(2$00L i.9ph Page 8 of CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 FIGURES ROD BANK INSERTION LIMITS VERSUS%OF RATED THERMAL POWER (Fully Withdrawn)S 180 111 h 160 m S<S 140 O 120 H H W g 100<<80iiisaiaiaiyiigBSgS^^S SSS'Se'SSSSSSSSSSSSSSSSSSSI

!i3: sB wmmmumuut S3 BaianmHHHB

>0 30 40 50 60 70 80POWER(%of Rated Thermal Power)*Fully withdrawn shall be the condition where control rods areata position within the interval S225and<231 steps withdrawn.

NOTE:TheRodBank Insertion Limitsarebasedonthe control bank withdrawal sequence A, B,C,Dandacontrol bank tip-to-tip distance of 115 steps.Page 9 of 11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 o O 0.6 FEBRUARY 2014 FIGURE 4K(Z)-NORMALIZEDFq(Z)ASA FUNCTION OF CORE HEIGHT FQ=2.50 CORE HT.K(Z)0.00 1.00 6.00 1.00 12.0.925 4 6 CORE HEIGHT (feet)Page 10 of 11 CORE OPERATING LIMITS REPORT.VEGP UNIT 1 CYCLE 19 FEBRUARY 2014 FIGURE 5 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF%RATED THERMAL POWER FORRAOC rt 80<u^70 dP 50 (+10, 100)UNACCBPTMLE(-30, 50)-40-30-20-10 0 10 20 30 AXIAL FLUX DIFFERENCE (percent Al)Page II Of II