ML20136A925

Summary of 790405 Meeting of Util Industry Committee on Reactor Core Condition Working Group Re Zircaloy-water Reaction & Hydrogen Inventory in Lynchburg,Va

ML20136A925
Person / Time
Site:	Three Mile Island
Issue date:	04/05/1979
From:	Duncan R, Tulenko J BABCOCK & WILCOX CO.
To:	BABCOCK & WILCOX CO.
Shared Package
ML20136A919	List: ML20136A916 ML20136A925
References
NUDOCS 7907180102
Download: ML20136A925 (5)

Text

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1

! UOPJJNC GROUP MEETING i

e 4/5/79 i .

Sumarized cre a list of observaticas that were discussed for working group along with the infonnation that mir.ht be 5 .

defined from these observations.

[ ~

.Honal Observacions_

Reasons _ l

1. Evidence of boiling.

,l'ol.s e on bl.gh TC 's . '

2. Rsto of water level drop.

Nistory of ex-core current.

3. Distribution of gmmia emitters.

I' resent current readings of J bncorcs.

i

@as solubility "cpeginess". 4. Gas rate emissions.

t!oise on pressure sensors.

i Cantna dis tribution in-core.

!!ovable in-core operatim. 5.

i

6. Will tell if guide tubes are Nove an APSR (ncmainally 25% intact.

,vithdrawn) . .

r -

7. Guide to TC indiention, Calculate temp. distribution.

.i 8. Rate of heatup vs core location.

Correlate SPND and TC data during transients.

9. Er-water reaction heat Calculate heat rate of Zr-H 2O contribution to heating of pc11ct reaction.

Identify how vericrus delta P & 10. Blocking.

flows go around.

Ifaterials & energy balance 11. Get better thermal hydraull'c inpu 6equence Cetter history c.g., quench tank pressure

12. Distribution of cooling flow.

Temp. distribution from SPND's (tieasure resis tance),

13. How much bypass?

better estimate of core flow. Dete:Toine how rnuch convner can tve tur Outside of core measurement - cooling. Determine if electrical heat, on second pump.

Therraocouples telling , truth 7 14. Distribution of core flow.

Flow streaming?

15. Same.

Oood core . flow balance - what cre

e. 5, f reoistances around the .

'g S 0'g 1 8 0f v

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',,, . . . .s .,

.' : .- 1 .6, -. .

' '; re' R5 a s otts_ . . .

Ibn5

' Nrvht bh s ' . - -- .

• rue' core fiow.

h.d .

Dcita.T.dcrosi cord froci TbT *

.s . ':. .-.J.*

w had.RTD*k.

s...,* '

h, .- i .+: t...

G. ge, core fl.: lg',. e.

ow .3 (lii.O*; rs%.. or opump off) .g:n. h ' ~171 Same '.-

Chan.;s

• Modulate flou.. .- .* . : .; , . . v-;..,;. .. .:. ;. .,; i.:' . . : .;4:: . .

.f. acrbdd A bath $SnNribobhn ~ .ib.  :.vio E rou4..;.. d OTSG. .

.y .- -.

, +.i - . . . r... w  :. > . > - u

,.hy. ,re, . - w.9 ,..,

sna1y:

s+ is of SPND

,dn, ta F.(: ., '...a ....

19s. -. . .. . . : v mp  : ..';. Core te o - e.. .g ..

.:. biItril7ubion oI heat gener,ation.

IO lid $ of ku}.cN br5ndibnb SUd$ '

.I (CRAC , , s trip-dowti;.of FRAP)

. ~ s. . . 3 , ,.

2i; Core dislocation.

belta P achods coi-$. . .

' f *.

'Neasurepumppowerkc.oolan:

'. ; 5. , ' .. . .

t 2 3. .: 'i .i.. sGet Delta P across core.

- ,,-l,.

• hemp. .

.. . i , . , . . .

i.. .; a'.1 in containmen;t.. . . ., c+ ..

23. Core uncoverinp,.

Analyze gamma .. .v..

deb'ld$ncNtankheacuprate,

$4.

%hh,Sai5tnce bN hr $iskcooi5nt l,.-

system. ,

'Debermine heat contribution. '

~

}n N$burai. circuiatdo$ ........ . I5.

TC reading , ,.,, .

Imbalance of constants. '

dor bikini;. ~

28. Delkrmine boliin which- de termines Anai P,ai control requ red.

Nebombineoxygen,

~

bintal.n N 6&db prshihrA e, k 27.

to keep.10.cc/kp,.,. -- . .

1. ~

[

58. l.oM temp. Zr if90 2 .., : -

$xperdt5ents,oN bydrod'ri . c ,' 3 Is it self limiting? -

' Johnoon i

avolution sitys (can ws have do itsome). - Have cracked claddingt b6rrc14th radini and axlai;. . .

' his tory; t ,

follow f'utbre transients with Tb

!knd othsr' instruments, itr.p,. SPHD s.

31. I6 curacy oI temperature.

I h cmperabur$ . shab11.I.ty of RTD'i; i

32. Detennine failures of SPND's l

.I.cok .for alu..lna, m counting for of lumped burnable, aluminum activity.

l 'f .53. Access lo system and

.Noro ddhA on PN andt configuration changes.

i'redionnalysis of primary coolint.

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' .p?it.13y. INDUSTEy cc'fdTE Ctt FDCTOR COP.E CONDITION _

0Y UTER o -

.v._e. .Y OF if0RY.1.]n CROL?

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MACTNil is me. .; m tM thvt.ttTOR L r -

i da. l. d Ap... . H1 . . 5,1979 at SMi kynchburg, Vhpnia .

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- Co: piled by R. W. b.mcan, Dir,ecbe,, Fueis develoNcnt

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l Frm the desk of

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fir. hi cs S. Tulenko tbnnger, FJe1 Enginctring Seg ock & Wilcox .

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Thrd N{,t5 !sidd i!nli i

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.B.b _i .l d idudiy.fes.t.tist o' n FActu bf_condit.tsn.

ISsN of bkl4 hee.m kut% on zire_aley.y;.tc.r te.act ..,io.. n an . d i+ferson.. inventory

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fisd:libriist iitiedid wt,ls is 154 du$ $6 sics

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A. d. 64, 6edustin Enginstrini, dd. -

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A. 6. R$4, ice $;4-it6)

6. 3. fdNd, 6Nd' .

C. C1twing.. ,r. Bra .

bs E.bO. ik i: .- : '.

g R. Y. t>}r , . . esrt, Bill .

H. No vw 4f. B8M .

foiim g.are high1(ght concTusTons Ard recter<endetions

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for fiddrili N. b uit % fre,. ,i ihe k'orking Crodp discussions.

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Canctus ~.:: nsto. , , .,3 ' .,. ' - '. .

- . O- kr6dt hyaiisbie hydrlhin Inwmtbry data, tic c:drit of httr

,rd,dbtibn ..i. .

d}ch bebtsh..at. Tkt.h hppers to be in the rarrge of fro:: 254355 i

of a va

. ilablo Ir cladding. tvaluation's by differrnt organi.zottens tuve The ui$d,dIYforenh.[Insiui.,iiud[r5 kbilov}ng IniN br) Is I'rO $52 knd hd h>een forusedir inventory to nonatize the within the c

....:.,.,  ;. .i.<

citir.5tes: Ir. A claddinHS,000 lb.

different extent

.: x ...

of rdtal-vaker . ..

reaclion . .

inthe. core. Otthe .7e newr.mts such at guide tubes, instrv-eot tut >es, fuei rod erd bhpi, fuci rod ipacers and burmble poison element cladding,

$ t6tal of . .. ;

7.005 ib. In thi core. The i.otai Inventory of It in the core

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., . Y. Th ilb6hi.tb co' ndtiica bb i.S TNr-i coro, ibh exf ent of sNhiMIO rhicl-ich (d d cajte efe::eni and can onIy be dedu::cd frus a d.e. b. . . ,ited 6va.1lo5tt6ri of .th . o.,6 hydrosen sciten product inwntury.

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7. a. e ., w,p .'.: s. , .'

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P&CCnWttdai fon, s . ..

E' WMn s v. .m. repor;a ir. . a .::;g . ;. ; .;,::t n estimts or metai ester naction exte

- bhsis%'16ilikI$. .h5.5rrfsMid si,iiiicJJ.-- *" ~~

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... . v. ; . . . . , .. . ..~.-

.- . .... .m.; . ;;. _ . 7_

. b.. . Ibtafik od iM hydro,. gen Inyhneory need to be cercrully looked it En3 dditM4d ts i Er4 fdnsi innrer. sts evaluation should inciude idl:datiii I62ntl$i$$ which hiv4 not been considered in ser e of ths $6SudNedas LxemIch hydrohhh In tid forn of hydefdes in the ciaddin3 ns. li I4suil of ihi Aetai-withr Mction, hydrogen dissolved '

fii tir3 pWidry eso'isht srise lha sai safar reaction and hydrogen lav5nf.bried wNkih th$liN, suc5 hi in the rad <asic systei. - ' ~

2. terhcluslta .

in tM ass 4 sis:eni of tim'watdres which may invo bem reached, Nd chsrh eblibhbd dirickh fM kbe sela14.aisr roaction has not been 66ndidsrd --

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k J M. h.: ~;. u'.

atteh .. .

kN hviji[ikihN N k$::einh-uiler rdaction rates that r>ay have

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b '6ssibie p ind iub$chucM eNech on iocaI c' lad ld@eratures should be eviloated, sinc 4 thdM ndy hitir the pictura relative to the core conditien. .

L Conclusibh r.. . . . . .

. Bt2.evaTualfons of fattrnal fuc% red pressure butidup indicate ihs{ idb6 psi internal pressure reufd essfly have been schfeved. Usino the systes pressurv data hvailt.bie. ##l fetis that ballooning and a stress Qived hode burst sid accer wben thd ciadding reache3 Moo r' using i.oCA type heating rates. , At the sieneer hosting rates typical of. that tJMt to havs occurred in THI-i fuel rod clad ruptures muld be

s. g * =

)/. .

/ cut.fcIphied at 140' f r clad {cytrcture . Tis mst likely region to bFJ I'U0i bd dENhU,IS kb5 tipper portkon of tfc Core. The upper Nd165 ofihe chhit Mi.{rnhdiedly id blgh imperature for t.he longest Nc:3 Nriods. jJdit}Wdii5 i'rixi O,h htEl esse 61y coolank out1'e t ,

- t . . , . , . . .

&tfroco'mies, r. dir. ee . .gs, it a t thete is. .a possible radici dbkthhion,bf ,fbk bk i c;$. udi.d ears irIO khctha. hig!c'st . ..desged region .

{E;nrd If.b b5 $ ddni$'h- -

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sL &; W ;i} S.s-6 _ . ._ c. w . . ., . . . _ _ . . . r . _ . _ _. _ _ _ _ . . . _ . . . . _ .. ..

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' 5b1 f'-N d t.b b uabd IS $$ oh

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feel gez oin,, :,,.4,-ry chamses addch idg, ht occtir nsr tic top of i fuel assh-bly 5bkCb cCbE5Ibb bif bxkdized Ird cTiddkng and ditch his unde' gor,e r rI ILEpid hosthh br) cooifnj cyc'iei s:r,y be Forth perfamin2 Such a

.s. . . . . > . . . . . .. >

cis.ufnifen Wufd afso, sfmf Ifght on tM potential for eutectic r,citinq ok higb kcsi$rdurbs al 2rdfitistenitic itsel int.erraces. -

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.4. 65hebOg ,

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TNr iteG NipdnN N. Nei rtid iibrfoiation could be este'blished

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if gescSus fissio,n,; p,r6 dust act vlt,9 reiEsse da.ta pere aralloble as a , ,

hmek. lod dh iiE Dd$i1N act.Ivliy re160se data.ws not: avaih bTe to ihn brking dr6up.

nR3 Hon

'[, .. .tydii4fA Nss}oN M.shtivfly.reie'ase i$dkattons (both ish$ ihd 551ubis flisfkjreducts) As i function of tir.h.

B. conciasth .

The cptes.

r.

tion of guide tube inkesrity is critt'ce'lly dependant 6n ths Extent of ID cooling whicb ray have been available sfuring high te perstdrd imriods. The guida Ma internal f1c4 gecdry varios with severbi fuei ass.ee. bly conflgurstioni. if f tbin the core there are hcie:51Ies abbis 016 guida tubes: Contiin controi rods, contain ii.nnsble pois6n rods or krd e pif4

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btxx:mukt od -. .

2 ., < . . . I . .> < .

Eyalohte a ,

fwl ..-

assed. ly c.mlid .6uilch temerature .

distrhtichs f5 esUhljsh if diem ti a pattero,nd only of' position di cbrds -

k.6.; siM,lN A ro>A .

iha.. phl.icui5f condur50c;ii,Ithin ths guide i.u

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. .. .. ddr d . s.h M.:hr* ihMN6 iMt M r e-Nrs of the Hork.fng

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s , . . . - 4. ,. . .

roup. 6.cre , not a....

mre of. er -n. kei In.. .,fomation prior to this seating.,

Exkrhich includ5: T

, B . lai.h c6nhairbent oxypn analyses vMch ~ l

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dnir uded O dhine kydroh.i r&>oved .

s frno the contafreent t,y a i l

pos. s e. ... . .ic fire o'r exact tiedni of tO firit r.ajor burst of fission . .

produch. ,achivNy from de cor,e. A rsre systemtic cataloguirrg of-fach. 6muld improve iQ a.sblitty of Dir Norking Groups to state Adniishi h M #st irdakid Mdidos 6r ne core.

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