ML18046A222

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Forwards Safety Evaluation Re Extreme Meteorological Conditions & Severe Weather Phenomena in Facility Site Area. Also Forwards Tx Tech Univ Rept on Wind & Tornado Loadings.W/O Tx Tech Rept
ML18046A222
Person / Time
Site: Palisades Entergy icon.png
Issue date: 11/21/1980
From: Crutchfield D
Office of Nuclear Reactor Regulation
To: Hoffman D
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
References
TASK-02-02.A, TASK-02-02.C, TASK-15-16, TASK-15-19, TASK-15-20, TASK-2-2.A, TASK-2-2.C, TASK-RR LSO5-80-11-024, LSO5-80-11-24, NUDOCS 8012110440
Download: ML18046A222 (6)
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riOV211980 ~*. ~.** "U' l\\T.rinq r'1t~:rr.,.. *~~-r~f\\opv : I.. *. -~ ..... :.REu.. LJ\\~.~~~,li :~~~~~_1.. 11.. 8 1:~t.-~- ~rsrRrnui.I.oN: Docket:.. *

  • .. JWetmo.Y:*g-**--*~, -

Docket No.- 50-255 NRC,.PDR. . RDi ggs Loca.1 *pbR **

  • JRoe *.*

. ".. ORB Reading... DEisenhut *

  • NRR Reading
  • RPurple

, : WRus se l'l TNovak bcru*tchffel d

  • RTedesco
  • '-LS.05-80-11-024

".* ~ Mr*. David. P. Hoffman ." *

  • HSmi th...
  • GLa i rias Nutleer Li~ens1ng Admi'nistrator.. *rwambich GC~alina

. C.Onsumers PQwer ~company. *. JCa-rter ~- . SEP Fne *.* : * * ** ?12* West Michigan Avenu.e *. OEl:.D. *.

  • RSchol-1'.,

. *~~ Jackson, *Michigan

  • 4_920.1.

-~ *.QI&E (3) ~

  • *. NSIC-CJBuchahan) * * ** *:
  • Oear Mr. Hoffman: *. *
  • TERA< "*

SUB.JECT: P,L\\LISAQ~s* - SEP.TOPICS.n-2~~~s*i*~*~~~~'. xv:_l6-_, XV~ 1*9, *j.v.~20..... *. .. The SEP review of., Topic ll-2.A, 11~~vere We~iher PhenOJTiena'i. has oeen complet~d. is the staff's.safety evalUation {SE) for the Palisades site. The review was done Hr confonnance.with Standard *Review Plan 2.3-. 1 and covers.

  • extreme temperatures~ lightn_ing strikes,' sno\\it and, ice *loads and wihd*and tornado loadings.

The 1;dnd and tornado loadings.. analysis was performed by** the Texas Tech *. University, Institute for o*isa$ter Research *. Enclosur~ 2 is .the Texas Tech. report. Please inform us if'your as-b_uilt facflity differs from the l icens.i ng bas.is assumed in our assessmen.t within 30 days of receipt* ~f this letter.* . '~". . You will note that th~.SE identifies a desi-gn. basis tornado viitli-* a probability'- .. of *10-7 per year and* is* consistent with* a Regulatory -Guide *l.76 design basis *

  • tornado.

The staff intends to evaluate* the :structural characteristics of - specific struct~res systems and *components important to safety to. detenni ne .their ability to witfistand-the _severe weather loadings. The plant design parameters. wi.lJ b~ ~hen.:b.e' c.ompared to the. proba~n ity of occurreri.ce of the. wind as a part 'of our structural e_valuat.ion. This c.ompari~on. wil.l.l?e used., to ev~1uate the *ne~e~_sity of= design 'changes_. *.. " "* ~- .BY letter dated ~anu~ry 9; i'979 we sent. our eValuat~on of Topic. 11~2.C *. Your response dated April 3, 1979 provided no comments, therefore we assume that the evaluation was*,acceptable* and is determined to be compl~te. * * ~ ~ ; By letters dat~d ApriJ 30,. 1979.; F~b~uary, $, 1980 and 9uly n, ;19SO we* forwa~ded our evaluations of Topics XV-J6, *XV-19, and XV-.20 respectively. Since we have .. *not 'received any. comments we assume tbe* evaluatfons are accept~ble *and are* complete. ~

  • Sincerely, 8 012 J! lO 'J..f IJ ',. I' Denn:; s.M. Crutct)fi el d,.Chief:.
  • .* Systematic Ev~luation Ptogram Branch

, : * *O.ivision of Li~ensing S~~*.. EPB:Dl/ c'.Oll&lj7~ OR /C..

SA:DL

-~u:~~ ~~r~;~:,~:=:.: :*:: :::GC:._ :*: ::.~~='.~~.:: _:.. ~~.~~:~~,~>:.. :.: ::'. :.:t;~~~~-h.: ::*:: :~~~.. *....... : ~~~-~::::: :. ~:~~:s:: :*: '. . DATE~..... *.*.... *.: 11 //7/_80 . l l/t(/80

  • .... l]l I ~I 80....... 111tff80. *....

. n A!'.,1so.,. i N_RC FORM 318 (9'76) NRCM 0_240

  • u.S.(~-o~ERNMENT-PR!NTl.NG OFFICE: 1979-.289-369

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    • .**.. s.Yste)"atfc *~valuaf lon ~~ogr;,,,; > ; ;. *.*.. *

._.:' *::*:J1~teorology ~. - ~ *.

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Palisades Nutl~-~r.. Gener~ting:Pfan( >~:*.,. * ~*....... ~. ~......

  • roe1 c, *rr_-~. A; seveT'e *.weather Pher.io~eh*a ~'. *

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  • .*Extreme.ineted'r.ol ogi.cal <~onditi o'f1s and severe weather ph~nomena in. the:... *. >
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  • . P_a 1 i ~ades.. site. region. were.*examin.ed * ~o.determine* if. s~fety-*re lated

>:* *::st.r~it.ure~, systeins:~ an~-conipo:nents are d~signed to~'.fun'ct'ion un~er _all-l' severe Weather.conditions. Di$CUSSed.below are these'vere.weather . phenomena which coulcf adversely affect the)alisac:fes site and which* .* sh'ould 'be* examined*-relatiy_e_*to the current design.**.. I . ~ =. *. '; * :~:

  • .NC>rm~~ ".daily temp~ratures rarige from, a mi.n:imluJI. ~f 20. ~~e*g;ee~ Fahrenheit in January t'o a maxi.mum *of 85 degrees Fahrenheit fo J~ly.
  • Meas~~ed
  • . exir:*eme temperatures.for the* site.region are 99 degrees Fahrenheit _which.* *
occurred.. iri August i9_64 and. ~15 *degrees Fahren.heit which :occurred in.

.... *.. D~cemb~~ i976.: The extrem~- maximum *and min{mum temperature~ appropriate.. .. **~

      • at the. Palisades. site. for general-plant design (i. e;.*~ HVAC. systems). are
  • 9o degrees Fahrenheit (equalled or e~ceeded-1% of the ~imeJ an~ :-1 degrees
  • Fahrenheit {equallecfor exceeded *99% of. the time). *
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    • .Thunderstorms occur an average of 39* days per year fo. the site region.

.. Based.* on the

  • annua 1
  • nu'~ber. of. thunderstorm days,. the calculated annua 1...
  • flash densi~y of ground lightning stH~es is five flashe*s :per square
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,' ;i :. ' . :.:::.:+'.:2... "--*~:y*_ '_*>.:.. :".>:/:.. ~. "*.... ~:-. ... : _,/~~\\r:::)~ter'~-~~-*A* s.tructu~~.1~i:th'. ~~~P*~-o~i.i~a,te d.i:1~e~~ ions ~-of the<~#l)s;~-d~s; *re~~fo:~::... . ::_*.. :., '~*tld;f,g cOri be',e~p.~c tod t~ be. subj;~ t~2:' 6n. 't~e ~Ve:a'g:, t{J~~ ', ~~i\\_e. :.evef£.*. :L*:. ..,_,J*. ... **... *** :* : :*_sify6::frs.. > * ~. ~*-.... *.; . ~: ..... :. :.*~-._... ~ *~* <:. -Tb*~*<i~si.gry\\.:)rid_.sp~ed"(def}ned a*s the 11,f~ste~t:.~ile 0 *.*!ind ~pr:.dd'~-~a height ;f.*.*... ' ~ '

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  • ..., * ~/i: f;:2 r:Jtoye 9(~.und Jeve 1 '*1~i th *~* re.turn. iserfod of: 1 oo yra Hr~~~ cc-:p tab1 e fa.~.

th~:** ,,sit2 "r-~~.i~~)i~. SS,. m'J:l~~: per'. h,ou{:.* Ori. t~/~-~~-rage t':.:~;;_a\\~:, s-t.01:~s*\\,~~,;~ :i~t :;_\\*1b' ~:3JS:.**** hual)y, a~d.frcc:;i1~g*r.ain'.*o*c~u~~**.~pp~o~irnatel'.y :a"d~;~;*p:c1'.(:'/~sr*:*: *r~c*;axfn::.;;ri ~ ~ rad1al tt11dkn~ss' of ice :exoected *in the sit'e r~gion is a~oul 1.15 inch-:::s.:.. *.;_ --~->-"" :.-.. :.-;-. -*~... *.:*" ;.;.*.:-- ::-........ *... * *.:....... :*.. : : -... ~.... " *.,.:'Mean inDtla f: s'r1*o*:*if~i t j n tt1e site'..~e9 i ~ri 1 s ~*pp.ro*x imate 1y. s5 iric~e'.s ~

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*in.~.'ndr;1al '.-1int~r-prP<:ip,itaiton sno'w *l~a*d*_.On ;rfl~t SU;face'of ahout 25 po~ildS..
    • .. per ~qua're foot.

1°i1e regioria 1 'maximurn monthly** sriowfal l ~ccurred--in,March 1965 and .; *... "tnblcd. *36:0.'. inches. The maxi_ mum s_no1*1fa iT from *a s i ngJ ~ s torrn totaled :19;. _5 i ;ich~s

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'** _'c* 'ir( D~cl:;i;ber\\929. 'Yhe.maximum rneas;ured show' depth 6n.fhe" around, for the 'site . rr:gion, is 24 i~ches. sa'sed. on the *100-year ~P.currence. accqrnulated ground snm*i~ .. '.pack,'. and the.*'43. hour probabl_e maximum wfoter _predpita.tio,n* for. t.he. *site region,

  • ti:-.~ sno1-1.l~ad* on* a*flatsu1*face is :a.bout 90 pcL;i*1ds per squai*e. foot *

~.. approxirnate. 60.:.r.-iile 1"adius from t~e Palis.c.des. site;-excJuding the water ei;~ca .. * '. ~*-

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ov~r. Lake.;.iichjgan,. On**the':average',*Jive torneidoes*. can *be. expected to occur in th,c vi~1nityo~ thePalisac!es.~it~eye,ry y~ar. .. -..1. -.... ~ *... . I I \\ .J

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~ *. . Ba~*ed 6ri :t*h~*'path.length and.. width.;dafi(J~~m t'oroadoes d¢curr{ng:in the*..

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','. :* !' s ~te::*regi Oh~ :the recurrent~ i nt~rva r'ior ~ torn~';d'?. at th~-;::s>;~.:.>i S: ~al cu*~.*.* .-*\\ . ;: ~:.:.' ~ ::--.

  • * *.. :: l_at.edto be about soo years. *

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  • ,The assump~i-o:n~:u"sed~in.Regula:t~*rY Gliide::L76 p~ov.ide* an ~dequate d~sign ;- ';.
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~ :. '*' '.. basi 5, t<<>r.-n~do:.. : for :the s 1t~-* r:egi o~. '::Jhes:e '.t.haracteri s't i 2~.. i 'nc lud~:; a. ma xt'mum. *... * :.. *.. * '*

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. wi n,dsp*e~d *of* ~.60 *mi l_es *per'. hou r.>(a m~*ximum *r_ota.t ion'al ** :wi ndsp*e_ed -~bf *290 * ~iJes * .. per hour, plllS* a :ma'xirriU(ll fransJatibna.l wfndspe~d of 70.miJes pet hour), a.

. *.. maximum 'pressure dro'p
  • _of ;thre,~'-pounds per 'squar::e inch/'and.r~tf:of pressure
  • .*.*drop** of J~o :pounds per *$quar~.*- in.ch :p~r s.econd.

. '("'.... -

    • Based oti :actual to~~ado ~ccur.rem:es in the sit{region ~rea and. using the

~

  • procedures.. di s~uss.ed *;n. WASH~ Bod~* a,s ite.-specif i c". des i'.gn: basis.. *tornado'..*.*..
  • .* * (W,it~'<a ;proba~:~ l i.tY of* oc~Llr;~nce. of.** l_O ~? :_.pe~ yea rJ :c:an '.b*e: ca_Tc~*iated. _ The*

... :~se_ of ~ite_-specific data for Palis,ades_ provides winds.peeds and pressure.drop's

which' are higher _than those *r~commende:d in Regulatory Gui~e L76~ :A t:ornado with a 360 mile per hour ~xi mum wi n'dspeeds*' (as recommended in the guide) has a prtiba.bi lity '*of o<<:currence of 10. -S.*per Year, based on.tornado. occurrences
within 60.miles. of Pali'sades, as opppo*sed to th~ desired.10*-7.-: pe*r year
  • .probability.* However,': e~ami nation of :the tornado *data, varying the area

-~xamined' around the plantfo~. tornado occurrences, and analysis *of the . uncertai~tfes *and bias involved in the reporting of tornado occurrences*' . indicates that a J60 mile pe~ hour ma~irru.rn windspeed probabl.Y ha~a:Jower . probabinty than *l_O.-5

  • pe~ y~a-r~ ;herefore, we feel Regulatory Guide 1. 76.

tornado cha racteri st ;'cs will provide 'an adequate design 'basi ~ tor~ado f ~r . Pali sades *. ".: -~.

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.* References. (',.

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.. ;*::'.' ~.. :._

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  • ::~:*. :"
  • .. ' u. s.':Department. of cprliriierce;.No'AA/,;,_cl\\niat~s*. *qf:t.he'st~tes~ i~. '*'lor/~1\\

1974>;; :.. :, './. "

~; :.

.. ~* .. ' ~. . u.s.:.Department of C9~erce~ '.'Cl i*inatic At*las Of the United.. State*s,;; ..i ~ :.. .~.' '

  • Jun~.J968. *.., **~. *

~ :.*. *

  • 1.

'*...... :-1. , _.,. * *:.*. *. u~:s:. Department Of c*olfU~erce;* NOAA,,**tii~ates; of the* Un1te*~/st*at.es~; *. . **::* 1973.._..

  • 1

.-{ _:.. :,.u~'*s ~ Dep~;tm~nt oJ'to~irc~~ c*rnnato~~aphy*' of th.e. Uni.* ted Stat~~* :

  • **No *. *86-J6i*"Climati_c Summary of 'the Uni.tf:!d Stat~s:,*.M.ichigan~".. 1964~.

. G*. ~ > d.epa~tme nt >:if. c C>m*;;e: rce, '. *~ri"\\_,\\;..-:L cc~*i :'c 1:imat.o1 ogi._~*~ { 6 at.~. *: .Muskegon; Grand Rapids, Mid -.Lan?ing,.t.1ichi gan, 1976.~ * * ~.. ~*:

  • . H. c~ s. Theim; New.Distributions*. of.Extreme Winds fn the Uhited *states,".. *.
  • ,.**Jo~ rna l*.:of th'e st,rJ~tu ra 1 :Di vi~ tori~. ASCE,
  • V.O.l>.* 94~, No~*** ST?., ; Jul/ i 968 *. *. **.

'-.;,A~e;~c~*~*Nationai Sta~dard Bu,ild~~g-tode Requ*i~enients for-~i~imum. *

  • *.*,Design ~toads iii Bui J ding*s. an.d Other.** S.t ructu res:, ":ANS I,: A58~1-197~~-:

~ ~ "Seasonal Varic1tion of.the Probable.Maxirrum Precipitation East of 'the. 1Q5th Meridian for.Are*as*from 10*to 1,000 Square Miles an:d Durations.* of 6, J2, 24; and*A8 Hou.rs," Hydrome(eorologi'cal Report *Nao, 33,

  • Wash.ington~ D~: C., Apri 1 1956> *....

. *:: i,:. .***. J atnes A~* R~ffrier and -Frank E: ~*.Bai er*, "Th~>Weat.her A 1 ma nae~ II Gale Research Gorrpany, 1974 *.

  • Davi<:! M. _Ludlu'm~ Weather.Record Book;_'.' Weathe.rwise, Inc~, 1973.- *
  • J~ L. Ma'rshal-1, "Lightning Protection," John Wiley and Sons, New Yor~,

1973. ~.. ~.. .. "ASHRAE. Handbook' of Fundame~tal s' II A~ri ca~ Society of Headng, Refrlgerat ion and. Air Condit foni ng E ngi nee-d;,. I.nc~, New.York. 1976 *. .. ~

  • Pauf Tatt leman and) rvirlg l.: Gri ngorten;.Estimated Glaz~ Ice and*. *
  • Wind Loads at the Earth's Surface for the Contiguous United States;"*'
  • . A_fr*Force* c*ah1b-~idge Resea.rch LaboY.~tories*,-*october 1973..

.U.S(Housing a~*d Home Finance Agency,'*"snow Load Studies*,". Housing- . *Research Paper No. 19, May 1952. - 1." u~s~ Naval Weather Service, "World~Wide Ai~field sun\\ma~ies,*'.' VoL VII.I',

  • ... Uni°ted States of America, Part 4, 1969~.*

~. -..

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. -~ :";' ' .. *.~*"" *>.* . ~* :. -~ ".. ~ .... :*,;;:_* *-~~~ .. ~. ";* *l...., ".:_._.. ~*" :". "::. *:. :* *,..'.,.. I_, ~ -:-tMeniO.,from_*Harord R., Denton (Assistant Director for--Site* Safety, Division.-- -05.of J e_chn'i ca 1_ ',Revi:ew, NRR) to _R ~

  • R~ Maccary (,L\\'ss i st ant :Di rector Jor.. **.. *.

'/}ngf_neerin~f *. Oivision.oflec_hnfcal Review,-NRR) dated_Ma~ch24~ 1975',

  • .. -Subject;: _:site:Analysis Branch.Positfon _..; WH1fer Precipitaii6:ri.Loads~..
  • ~
-*\\
  • .,..... '" c,.::..: *, ::.. ** ' *--*

Meino f~om*Jer~y Harbour (Ch.1\\~r.- Site Safety. Res*e~rch Branch~ Division <-of Re~*C:tor' Safety _Research,-RES)-to _L. G.- Hulman *(Chief, Hydr:-oloqy:-. Met eor.ology Branch', D. i vision :_of Si t'e *Safety al'ld-'Eiivironme nt al.. Ana lys_i s; . NRR) Ciate.d August* 14, *, 1978; *

Subject:

.* Torriado *Frequency Data" for* SEP**

  • Revi'ew.---

.. Regul~tory Gu1 de J. 1.6 ~ "De~~ gn Basi_s To~~ado' ior,'Nuclear P;ower 'p 1 ants, u* ..

  • LJ *. s. Nu.clear ~egu_l ~tory COrrinii ssi on-(Washi ngt_on,. D ~C *
  • WASH.:Ol300; "T.edirii_c~ 1 *-Basis. :for I nte~ini Regi ona*] Tornado-.-C~iteri a~"-

. : U~S. Ato;i1ic-£"ne'.g_V,Commiss1on, Ma_y:-1974~

  • ~- c.' s. Thom; "T ~rnado Probabi Ht; ~s-,

11 *Month iy Weather Review, Oc:tober""Detember 1963, pp *. 739:-736. ... -' ~* < ... ;~..

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