ML17329A066
| ML17329A066 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 08/30/1990 |
| From: | SAVITSCUS C WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML17329A065 | List: |
| References | |
| 12-NI-05, 12-NI-5, NUDOCS 9106270137 | |
| Download: ML17329A066 (30) | |
Text
NEP-6.4A"(S/8~)T asna M su~now g CodTRoL,S SECTIONCALCULATION ANALYSIS Nuclear Engineering Department
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A'~7.C REVISIONS NO.REASON FOR CHANGE PREP'D BY DATE BY DATE APVD-BY DATE METHOD OF VERIFICATION:
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To ensure that the Appendix G'limits are,not exceeded during any anticipated operational occurrence, technical specification pressure-temperature limits are provided during low temperature operations.
The embrittlement algorithm specified by revision 2 of Regulatory Guide 1.99 is more conservative than revision 1, and!'requires that these limits be re-calculated.
I The Low Temperature Overpressure Protection System (LTOPS)provides protection against exceeding the vessel ductility limits, as expressed by the Appendix G pressure-temperature limits, during cold shutdown, heatup, and cooldown I operations.'he,'limits resulting from.implementation of tha new revision to s!Regulatory Guide 1.99, requires that the LTOPS setpoints be re-eva'lusted.
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DAT~C K~87 I RIVERSIOE PLAZA+++'i+COMPAHY X EM 8 8: COLUMEUS,OHIO,<z<piE Spile p4q~r LT P LAN t.o'4 TKg PWAWRC Ot/~PRWSOHI9AnoIJ pgoyP<nO~(gTup)q~J~7 f r I I I I I I~I I', 1 I I I I i I I I f!: i I'I r I I.'~'I~r~M~r~I TASLE 3.4 Mnx Overshoot/Undershoot Oelta P Values vs PORV n{n T{se Oue to Mass Tn oct{on 0.C.Cook Un{t 2~Pg$~WaPuC.~/Z FOC W/Ii'Overshoot/Ilndershoot Values s{vs.PORV Onen{n T{se sec e Setpt Press.Mass lnj.1.0 2.0 4.0 6.0 8.0 10.0~Rate ,Over, Under Over Under, Over Under Over Under Over Under Oval Under" PrS 400.0 500.0 600.0 700.0 439.2'-429.7 4Z0.2 410.7 439.0 231.0 446-0 232-0 460-0 ZSZ 0 473PO 296.0 487.0 310.0 499.0 318+0'38.0 302.0 635.0 381.0-542.0303.0 641 0 38S.O 555.0 372.0 566.0 388.0 651.0 460.0 560.0 48Z.O 578.0 403.0 671.0 492.0 588.0 407.0 681.0 493.0 733.0 465.0 738.0 479.0 747.0 547.0 755.0 576.0 765.0 577.0 773.0 591.0 e PORV Closure t{se 8 4.0 sec.Notes: 1.Mass{nject{on rate obta{ned fran RCS pressure vs.s{ngle puny charg{ng fler.'2..Overshoot obt'a{ned fran snx delta P overshoot vs.'sass{nject{on f ion curve.3.Undershoot obta{ned fros sax delta P undershoot vs.sass{nject{on flaw.I I'-'I~I I'!'I I I I~I i~i I M I I I i I i A~~l'--r r P~0 a f y~, t>>i>>><'"'llrAV*~
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~85.0 F S/G tesqerature
~135.0'F V 60 TASLE 3.6 r;"',)lax Overshoot/Undershoot Delta P.Values vs PORV n$n Time Due to Heat In ection O.C.Cook Urht 2~+6 gO g~/r)r (4$+r y~~PWI7-]Overshoot/Undershoot Values sk vs.PORV nin Time sec N'etpolnt Pressure 1.0 0.0 Under Over Under 6.0 Over Under 400.0 438.0 278,0 445.0 279.0 459.0 295.0 6.0 Over Under 475.0.311.0 6.0 Over Under 490.0 311.0 10.0 Over Under 505.0 324,0 500.D 540.0 338.0 547.0 342.0 600.0'39.0 419.0 646.0 433.0 562.0 381.0 576.0 395.0 589.0 407.0 60Z.O 408.0 659.0 468'0 672.0 487.0 685.0 493.0 697.0 495.0 700.0 739.0 512.0 745.0 516.0 757.0 563.0 770.0 579.0 782.0 581.0 793.0 585.0~Valve Closure time G 4.0 sec.RCS temperature
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REFERENCE DOCUMENTS FOR THE CALCULATION TO SUPPORT THE UNIT 1 LTOP SETPOINT CHANGE E I-n'~t'II%uaeg w l A4\'g IOI ft g1' AMERICAN ELKCTRlC POWER Oate Subject January 4, 1990 COOK NUCLEAR PLANT Low Temperaeure Overpxessuxe Proeeccion Syseem Seepoint Evaluaeion Report From To P.G.Schoepf R.C.Carruth Aeeached, for your use, is an approved copy of the Veseinghouse Repore,."D.C..Cook (Unit 2)Low Temperacuxe Overpressure Proeeccion Syseem (LTOPS)'"Seepoint"Evaluation." This report provides a Cook Plane specific application of the Veseinghouse Owner's Group methodology for LTOPS seepoint'.determination, including a sensitivity study on PORV opening time.Although the report eitle indicates"Unit 2", the evaluaeion was intentionally performed using.,the most conservative of Unie 1 and Unit 2 plane parameters.
Therefoxe, the methodology described may be applied to , either unie's'isoehermal heaeup/cooldown cuxves to calculaee=that unit's LTOP setpoine.This report should be used eo calculate future LTOPS seepoints based on the results of reactor vessel material surveillance program capsule analyses.Please noee thae.this xepore provides justification to.reeain the current Unie 2 LTOPS setpoine (T/S value)of 43S psig (provided FORV stxoke open times remain below 6.S seconds)when the heaeup/cooldown cuxves developed per Regulaeory Guide 1.99, Rev.2 are instieueed.
These new curves were submieeed to the NRC via AEP:NRC:0894L, and are scheduled for implemeneaeion during the 1990 Unit 2 refueling outage.Aecachment cc: R.L.D.R.J.D.T.R.T.P.J.R.Shobexg/File:
AEP:NRC:0894L Hafex Grier Saeyan-Shaxma Beilman-Bxidgman Sampson/T.
R.Stephens-Bridgman Inta4yrrcm 4 IC a-Si, P;