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:	Crane
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

.

...... uuas l

l 1

UOPJJNC GROUP MEETING i

4/5/79 e

Sumarized cre a list of observaticas that were discussed i

be for working group along with the infonnation that mir.ht 5

defined from these observations.

[

~

Reasons _

.Honal Observacions_

l 1.

Evidence of boiling.

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

2.

Rsto of water level drop.

Nistory of ex-core current.

I' resent current readings of 3.

Distribution of gmmia emitters.

J bncorcs.

i

@as solubility "cpeginess".

4.

Gas rate emissions.

t!oise on pressure sensors.

i!!ovable in-core operatim.

5.

Cantna dis tribution in-core.

iNove an APSR (ncmainally 25%

6.

Will tell if guide tubes are intact.

,vithdrawn).

Calculate temp. distribution.

7.

Guide to TC indiention, r

.iCorrelate SPND and TC data 8.

Rate of heatup vs core location.

during transients.

9.

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

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 Temp. distribution from SPND's 12.

Distribution of cooling flow.

(tieasure resis tance),

better estimate of core flow.

13.

How much bypass?

Dete:Toine how rnuch convner tve Outside of core measurement -

cooling.

Determine if can tur electrical heat, on second pump.

Therraocouples telling, truth 7 14.

Distribution of core flow.

Flow streaming?

Oood core. flow balance - what 15.

Same.

cre reoistances around the

'g S 0'g 1 8 0f v

e. 5, f

2

, ~

.' :.- 1.6, -..

+

.l ".

.~

.s R5 a s otts_..

Ibn5

' Nrvht bh s '.

re' Dcita.T.dcrosi cord froci TbT h.d.

• rue' core fiow.

.-.J.*

.s had.RTD*k.

ge, core fl.: 3 (lii.O*; rs%.. opump off).g:n. h ' ~

s...,*

lg',..

w

h,.-. t...

i +:

G.

or 171 Same e

Chan.;s ow.

.;4::..

Modulate flou..

.-.*. :.;,.. v....... ; i.

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

,... - w.9

, +.i -..... :.

.y.- -.

.(: a......... : v :.. Core te 4..;...

u hy,re, sna1y: s+ is of SPND,dn, ta F,..... s - -.

r. w >. > -

19 mp.'

o

- e...g lid $ of ku}.cN br5ndibnb SUd$

IO biItril7ubion oI heat gener,ation.

.I (CRAC,, s trip-dowti of FRAP) 3

. ~ s...

Core dislocation.

2i; belta P achods coi-$..

3.

.: 'i.i.. sGet Delta P across core.

5., '...

' f *.

asurepumppowerkc.oolan: t 2

'Ne,. :

,,-l,.

hemp.

... i,.,...

Analyze gamma in containmen;t..

$4.

deb'ld$ncNtankheacuprate, c+

23.

Core uncoverinp,.

i..

.; a'.1

.v..

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

system.

}n N$burai. circuiatdo$

I5.

'Debermine heat contribution. '

~

TC reading,

Imbalance of constants.

Anai dor bikini;.

~

28.

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

bintal.n N 6&db prshihrA e,

k

~

27.

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

$xperdt5ents,oN bydrod'ri

. c,'

58.

l.oM temp. Zr if90 2.., :

[

~

Is it self limiting?

3

' avolution (can do it -

i Johnoon sitys ws have some).

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.

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

l

.I.cok.for alu..lna, counting for 32.

Detennine failures of SPND's i

of lumped burnable, m

aluminum activity.

l 'f

.53.

Access lo system and

.Noro ddhA on PN andt configuration changes.

i'redionnalysis of primary coolint.

w--,.

.a

1 rgo-19-126 lj.

. 7.. '...

y.

s

.i ;-

, q.;...

)1

....u s :.. --

~

/

.. ;0..

,u,c,,h1LE5$T596d.

l TtREt~

't!T 2

~

...-*:'P.4,dc

.t

' 4.:

=.

~

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

.?,

t..

ra s-

0Y UTER

.v._e..Y OF if0RY.1.]n CROL? fGIT.r.ft2 ct.i 7.1Rt 1.

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

i

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

l

.4<<.

i. ;.

Co: piled by R. W. b.mcan, Dir,ecbe,, Fueis develoNcnt cedilu.sQld,rnc.

k s

s.

t s.

.n-s 1

l Frm the desk of R. W. DJnC80 s:.

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

• .*..f_f.

./

.. I,,

Thrd N{,t5 !sidd i!nli i

~

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

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

.n.

.....:. :n..:,...

.. u,..... :y.... ;.., -

~

fisd:libriist iitiedid is 154 du$ $6 sic

..C,.

b bb06 brib0Li wt,ls

....:.=.=-..".-------~

1.

z

^.. e. : +..,.-

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

~

iaip6 iwdarfchu, h6ftis

~

l

b. 6. h, bk. d..

n. s.

.. \\. b.m i.

. rew 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

~

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

t:-le.. ~.:: to. 3 '. ' - '.

~

t Canctus ns,,.,

~

1.,

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

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

..i..

i of a. ilablo Ir cladding.

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

.i.<

different extent of rdtal-vaker reaclion citir.5tes:

Ir. A claddinHS,000 lb.

x

.: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

{ s; 52.b'.,1'0 1 b.

t e l E

A l

)

s s

a 2,.'.

~

...s Y. Th ilb6hi.tb co' dtiica bb i.S TNr-i coro, ibh exf ent of n

sNhiMIO rhicl-ich (d d cajte efe::eni and can onIy be dedu::cd frus a d.. b...,ited 6va.1lo5tt6ri of.th. o.,6 hydrosen sciten product inwntury.

e

7. a. e., w,p. : s,

.L,.

. g ',~: ;..

P&CCnWttdai fon, s.

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

ir.

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

~'

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.

' ~

hcluslta 2.

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

~

6.:..

atteh kN hviji[ikihN N k$::einh-uiler rdaction rates that r>ay have b '6ssibie ind iub$chucM eNech on iocaI c' lad ld@eratures should be

~

p 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' r clad {cytrcture. Tis mst likely region to f

/

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' t e

t

&tfroco'mies, r. dir...gs, it a t thete is..a possible radici dbkthhion,bf,fbk bk c;$. ears tha....

ee i udi.d irIO khc hig!c'st desged region

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

\\

d.

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

5b1 f'-N d t.b b

uabd IS $$

oh

'~

feel gez oin,, :,,.4,-ry chamses addch idg, ht occtir nsr tic top of i fuel assh-bly 1,

t; e

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.

, '.,~

.4.

65hebOg E'"....

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

r

,. s 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. tion of guide tube inkesrity is critt'ce'lly dependant 6n ths Extent of ID cooling whicb ray have been available sfuring high r.

te perstdrd imriods. The guida Ma internal f1c4 gecdry varios with severbi fuei ass.. bly conflgurstioni.

if f tbin the core there are ee hcie:51Ies abbis 016 guida tubes:

Contiin controi rods, contain ii.nnsble pois6n rods or krd e pif4

\\

. #. J.'.i.4 ) '

l

.W. \\_ '.,1

4..,

s

=

j

.Us~ *

< ". *.. ' *k..

. N*

i' b

. '.,; T, J o.-

, a#.,.,

..,,.* s.

.. < g:". ' '

a,... ";. '.

'.*.:.*...1.a..,..*'

, ',,'.. * *: : vt.1.;;,T. '; ';llW '*p.d'* : *D..+ m, e.

vN. '.p'%.j,,...., ;.....,......... e.:. ~. '.. c. h.,Y.

.'.G m. s.nM.t.....

c s.

• -- 2.:. ~*.; ;...n*

,4

• k f

,16,..

~: <...,

... ~..... o... ; 1.,.u,.....y,, %,m,..,,:,e :;( '..$, c**o.f

',;.. ~.............. o..

..v

.n.

~~r..,,

"* ? ;0* *.~. ** *.'

...f

'

• T ' '

... s. v.... y]:.* *."y ':. '.* ::.' * ' '~~.2. v~s'n.

' fS '.~ 're'

~

• G.? t

. "., s

.,,. ~... ;. ;. n ?.

v.. %.-,.......

~'r...

. #:< s. ~: h*. -

1..,

s.

a

.,.;,r 9.~',,... -.*. '....-;...

....'.f.;.............

s'. '.. '.... g...y U. :/

.J y t..:

/.t,

.. ~.

..e....

a.

...i..,. :. y. -

o..

4 s....,.

~'.<...e.7.'.

., ma.. c

'.* 7..,N. F.. h' *.

N*-

54.u V p*.e:4m *.p

% *,l. y...i

..<n

f. *.

.l :..y e';* ;....

.,o

.~

.. :... w......,.-:

~.m^.'...

s

.s 3

..d..fl r.

o

.s s.

btxx:mukt od 2., <..

I Eyalohte fwl assed. ly c.mlid.6uilch temerature a

distrhtichs f5 esUhljsh if diem ti a pattero,nd only of' position k.6.; siM,lN iha phl.icui5f condur50c;ii,Ithin ths guide i.

di cbrds A ro>A..

g.

..... ddr d. s.h M.:hr* ihMN6 iMt M r e-Nrs of the Hork.fng roup. 6.c,

-n. kei In...,fomation prior to this

4.,.

re not a....

, B. lai.h c6nhairbent oxypn analyses vMch ~

~ '

s

~.

mre of. er Exkrhich includ5: T seating.,

dnir uded O dhine kydroh.i r&>oved frno the contafreent t,y a s

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

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.

1 b

e, min...:.n.3,.......,,,..=,-....,.,,,,.a....,,.,...._.,,,,..........,..

1

. 1

. : x : "..

,l w:....,... u.. :..~ - - 's;..t 7.. ?. ;.:. -.y. ;.,a.. u.

n.....

-.... a

2.......

,.;... y.....,.;.,.;....;..1

,. ~,... ~.

.,q.

.. r.....,3 : u.. :.,,. L;... 3...n.

..J.....,.,

..-3,.

c...

• .....,1

...,,,......,...,.;~...... ~.:.

~

..,..i-...'.;...."~..,._~......

. r...

s, r..

,. ;,,.~j.a m

<?_..

s.

..-.....u........

s i.

e

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