ML20210T417
ML20210T417 | |
Person / Time | |
---|---|
Site: | Satsop |
Issue date: | 03/14/1975 |
From: | Oreilly P Office of Nuclear Reactor Regulation |
To: | Office of Nuclear Reactor Regulation |
References | |
CON-WNP-1760 NUDOCS 8605300200 | |
Download: ML20210T417 (21) | |
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; c ; as R SINK / -3,! [ ; 4 ya;f # p- ': .~ - ,g on rebruary 25, 1975, r.r -- - :=*ives of NFPSS, FMam, ard OzrN= tion U ' Wrela-ing met with the Imc staff in BetNah, Marylarx1. The meetig i
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a. l . .r f s S. . . . .h Yl'%th JY* $ <44 >~1s? .*o M VN' ** * #. , e' ** i-l .w Jibasco described the 3 resent Ultimate Best Sink design. The present
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design consists of a mahination ~of wet and dry coolig towers located en the roof of the >=r414=*y mildig for each unit. The propoemi . design revision iculd use only dry r=14ng towers, which would be 1 hr=*=d on the Anr414=ry mildig roof . (see nv1 = $re No. 2). ,
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i* ' Ebeeno than described how the mobeca:ological A-ip. bases for the present Ultimate Heat fdnk were obtained. The 20-year set of J,_ me*=<=nimin=1 data obtained at Olympia was used to obtain the ^N i me*=r=elenical design beans. ma mathed used to esctrapolate the '/ l amt of 20 years of data to a 100-year recurrence interval was described <. i by Ebasco. ;nstbod. 4._describel,in,.hel-n1LNo.,,3. ,Jaig ,this , a maximum tangerature of 108 E' was obtained. No attempt was L -
.. method, made to "ce6 mist'n'HisiclyisitEdaTa ~iiFthii~ data o'Eni5ed'onsite ~ ~
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with limited data availahh fecm Elma. Ibasco described a penhah414= tic ' - 9
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- x Details of this y 4= hili =*ia argoment are also dancribed in Enclosure , '
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- c fin response' to our'irrpiry '4nimm stated'that, if the eWEic i temperature exceeded the da-fem basis Inavin= tarperature for the dry emling towers for a sufi'iciant paHed of timo (about 4-G hours), - the capability of the Ultinata Beat Sink to functica in the event of l ', f an.=r"4Aarit might be inpaired. ~.- . .a. .:, .. 1 ,o , .., S ,cy:i @w~,..f+. , " ~
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, i ' Die reconnandations of P=an1=+~y Guide 1.27 ranawlirig the r t.w,ulogical . I da=ip bases for the Ultimate Heat Sink were then diam = mad. - M,
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C$- .. W;.. & M: .> g 4 s ; ;,L(1) c se an appropriate historically recorded maximum temperature frcm
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;(2)n Octrelate'the t .- - T i recorded at the sito with thoseL_.- ^ '>~
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_. , :105 F ramrdad at Elca. Use the'103 F taperature in the Ultimata , Heat Sink><dee6pn. , ,
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l q (3) Use the y---Idl14=e 4, -- - .; ate t*- ' emf'idarion intervals. =The -w=4 described, r ,==iM= *1 Ming 'a-isi all conditions
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worst ~ ~. l reammable combinations thereof should be used (Icss of cffsite power, earthquakes, =i==41ma, +---=+3= es, high winds) along With the gper confidence ilmits. l : , i - j - 2
. (4) . Use a 2cuer ==vi== ' .-- he (such as 93.5 F) and show that 32 i the casequences of exceeding this temperature are ar-e=him, s - '.. \ l;. m; < . . L .
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- TABLE II - PROBABILITIES OF DAILY MAXIMA ,
i
.)
1 Temp. Probability - . Return Period - .. ( F) . (decimal) .. (years) ,,, 92 0.004215 0.65 93 0.003058 0.90 3 93.5 0.00274 , .. 1.00* 94 0.002238 1.22 95 0.001632 1.68 f i 96 0.001192 2.30 97 0.0008693 3.15 98 0.0006387 4.29 98.5 0.0005479 5.00* 99 0.0004710 5.82 100 0.0003424 8.00 101 0.0002523 10.86 102 0.0001812 15.12 i 103 0.0001365 20.07 l 104 0.0000976 28.07 i 905 0.0000727 37.69 i - g 06 0.0000531- 51.60 ...
$07 0.0000387 70.80 i
! i liO8 0.0000274 100.00* i ! l ) 1
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. n. 3 l Distribution- -
Docket Fil R. Tedesco 4 NRC PDR V. Stello
! Iocal PDR R. Maccary NRR Reading (M. Groff) H. Denton R. DeYoung V. Benarcya V. Moore C. Inng D. Skovlolt J. Kastner D. Muller G. Lainas R. Denise D. Ross K. Goller T. Ippolito G. Lear J. Knight W. Butler S. Pawlicki
- J. Stolz L. Shao
} R. Clark B. Grimes ^ ' T. Spies W. Gannill D. Vassallo R. Rallard K. Kniel P. Fine O. Parr T. Novak , A. Schwencer M. Spangler R. Schemel EP Project Manager - J. Norris D. Ziemann Attomey, EID P. Collins IE (3)
R. Purple V. Wilson G. Ynighton ACRS (14) G. Dicker Project Mana4er - P. D. O'Reilly B. J. Youngblood IWR l-3 Readmg - W. H. Regan, Jr. IWR 1-3 File R. Vollmer F. Kantor W. Houstcn V. Goel S. Varga T. Johnson R. W. Klecker C. Stepp F. Schroeder J. Greeves D. Budge T. Murphy R. Karnasiewicz C. Liang P. Sh % rt J. Costello F. Cherney P. Chen E. Brooks R. Satterfield G. Manz F. Ashe M. Bolotsky I. Sibweil L. Phi 114na R. Culp W. Bivins D. L. Milliken L. G.1111 man J. E. Fairobent b i. e+ e QM _ w%e e ,%e w = % e *9 }}