ML20199G199

Corrected Page 4-12 to WCAP-14723, Farley Nuclear Plant Units 1 & 2 Power Uprate Project NSSS Licensing Rept

ML20199G199
Person / Time
Site:	Farley
Issue date:	11/19/1997
From:	WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML19313D093	List: ML20199F813 ML20199G155 ML20199G187 ML20199G199
References
WCAP-14723-01, WCAP-14723-1, NUDOCS 9711250119
Download: ML20199G199 (2)

Text

ATTACHMENT 111 SNC Response to NRC Itequest For Additional Information Related To Power Uprate Submittal. Joseph M. Farley Nuclear Plant, U,its 1 & 2 CORRECTED FAGE NO. 412 WCAP 14723 "FARLEY NUCLEAR PLANT UNITS I AND 2 POWER UPRATE PROJECT NSSS LICENSING REPORT" s

I

4.1.4.3 Results and Conclusions

'lhe following are the results and conclusions drawn for cach of the analyzed scenarios:

RilRS

• Cut In" It was determined tiu.t the RilRS is capable of accepting the RCS heat ternoval function at uprated conditions. 'Ihat is, the RilRS can be " Cut In" (and atmospheric steam release can be terminated) within the !! hour time period which is assumed in the radiological dose analyses.

" Normal" Cooldown

+

With all cooling equipment trains available, the maximum calculated duration to cool down the RCS ftom 350*F to 200*F (Cold Shutdown)is less than 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. The 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> maximum calculate 41 duration is well within the 30 hour3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> technical specification.mldown time.

With all cooling equipment trains available, the maximum calculate 41 time to cool down the RCS from 200"F to 140 F (Refueling)is less than 211 hours0.00244 days <br />0.0586 hours <br />3.488757e-4 weeks <br />8.02855e-5 months <br />. A iy cuension of the cooldown l

time is primarily an. economic factor.

" Single Train" Cooldown (equipment unavailable)

If plant cooldown is initiated with only one train of equipment available, the RilRS can cool the RCS from 350'F to 200 F within 50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br /> with the SW temperature at the maximum l

allowable operating temperature of 95'F. If the SW temperature is 97.3'F, one train of equipment can cool the RCS from 350 F to 200 F within 55 hours6.365741e-4 days <br />0.0153 hours <br />9.093915e-5 weeks <br />2.09275e-5 months <br />. The cooldown time can l

be reduced to within the Technical Speci0 cation limit of 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> by stopping the operating reactor coolant pump when RCS temperature reaches 220 F.

liased on the above discussions, it can be cueluded that the operation of the Farley Units I and 2 RilRS at thennal uprate RCS operat;ng conditions will not impact its ability to perform intended decay heat removal functions.

4l.5 Other NSSS Systems Other NSSS systems wl.ich were reviewed and found to be acceptable for power uprate were the lloron Recycle System, the lloron Thermal Regeneration System, and the Waste Gas Processing o

System.

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