ML19220C970

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Preliminary Chronology of TMI Incident on 790328 & Subsequent Status Through 790407
ML19220C970
Person / Time
Site: Crane 
Issue date: 04/09/1979
From:
NRC COMMISSION (OCM)
To:
NRC COMMISSION (OCM)
References
NUDOCS 7905160121
Download: ML19220C970 (6)


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T ime (app _rcuat.e_)

D i s c us s i o n o f_ p_e n t s_

De fore 4: 00 am 1 H op:-ra tor "orking cn Feede a ter Systc 4: 0 0 a.1 T h e i r,s s o f a l l (main and auxiliary) feec.ca ter f!m, occ ce d '.i.ile the reactor was crera t '.g a t 951 p en. o r Tha transient m in i tie 'od *, a ios s of.on m. sate p t.

p t

'ne turb;,c trirred.

3-b sec lairc

,n electe

!Lic rel1:

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C' * (2255 rsi).

j rei ' nve :: -' ura in thn J-12 sec lat:r Th.. -: e. : ' :

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his a

'-J 3 ;,ressure

(?'55 n ;;)

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x:' c.a r idduce ;21.or g rm 'tian to

, action ie c a s, roat

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c hne err s "1.

T he 5:C5 contin'.e<' to dep r: s s r i.. e fer aWut t% nest na hours.

15 c.et la ter The tr~ rera'ure in tho ~ r. 3 h i t l e r; 0

p.:d s at ' ' - it 610 F ti'.h a ptessure of alcut 2150 psi.

20 sec later The a;rriliarv f e e d i t '. e r p ' >s in both safet,

  • rains (1 tur.Nire dri

,n pi.rp a Ilbi (e ' eCtI r a ). ly '!? I '.' e I f C" us ) k.eIe s la c'Pd d'id ore runnin'? 1t presSU+e reld/

'F, IMjrCl. ~1 t e r into tho S t e nr1 genr a 'c rs a: d rr ~om t"e residal hel' p rr. d ' ~.' 'i

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b a M d P., h.!d lt IDVelt O f '!a te r C11:]

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4:02 ma The rrrs

,.,s init'ated a, the itC5 piecture docroased to 1600 psi.

.: 0 '-a : 11 cm The ;o ensuri/er In ml indicaL an ce n t ofen :1^ h igh ane che 0;^cra tor rinua lly

! r ! p;'e t' l',i f i rs t iii'l :vps a f about 4:00:20 and the se;ond a t out ':10:20 4 : rT) m

t J r in tho C5 flashej te s'o m :

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4: 11 a:n Tho 7, m uri.er le a! indic1 tion ccnes b a c k' 0 0

5. C d l n 4: 15

'l The ;:C ^ 3,n l. w

-h' 'ar-root n o di n b l e'., a t, f) psig due to conti-i:<j J i c chd r<je c

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t,. e r e,l : C f Va l W Lhdl had fallerj LO Cl0Se.

4:20-5: 00 am T he pc5,

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  • qhili,:d at a.atur-afod corn lition of :N ot 1015 p,i and r r e :-

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[( l'.) ! c t' [l' I p j' O :* [' C f f ) R[ ptypS jn Loop S.

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7,, *. l; ) 0 \\.Ont OfistalU a t b 7 C ' b'_' '; t f e ' f './ I h I Il

'l U! n!e t e 5 il n d the* cold leg tocpora '.m e drer, ed f n noar the tr' pcra ture o f high pressure injec-tion

'ter (150 c'o rp ee s i' ),

C:20 am il e a iled i>ren relie f-

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hy tha croritt' I:/ closing a block snivn.

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9:00 e,.

The prnssure in con ta i r, ;n t pen ed a t a. 5,:s i g.

9 : 00- l l : M a"'

The i:rs gi m ;uce inc t, a wd f rc 1.?!J rsi to ?InD ;. i, 11'30 an The np: rat'r 0, mod the lrr sorizer reliof ca l. ' t o v:p n, u r i co thc pr.S iM a ll at'rm'pt ta initil(O hiiR CCOli q fi at 400 ps i.

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roi and '% core f.' t o ri i :. g t 1'it e Firtiall, r} i '. c h a r(py d ihn reliof r,apicil', 'fas re t su f fic ien t t o,< nl enough. o r r, c h

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D i s e 's c, s i n n of F roi r ;

5: 30 p'n

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in et M r to repressori/e the t eac tor coolant ty; tun.

5:30 - 8 pn The or", picssurn incrc r :d fr"' 650 psi to MUD psi.

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.J t i's 'he hot I' l t r", ' ra t ure -' 2c r ea s ed f,y ci,' r > u t %0

?cs F !nd 'he cold leg i

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ie r"lci Or.a5

[T i n<1 r N ied 3 / r n :$ c f a b } ' c. h i n g r'

' In n e, L> r c e r;m and ' t e r'ing t o the cnmHnwr b;

- t e n c v c. ' o r i 1: i t h ' ' R C " -' ' i o d to abut o'0

'egrec s i a nd IUO osi.

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,th ta rri.) f'n ' ' i '. i; [ p + ec,1d uf 5 j1[ing "?")

v,n i ch ':a s s t. Mein.en Ll) found to indir a t >

ro ter Dn 100 deg F.

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.'G r e bey ond the rance for cc outer. Mut, tc m ( i:- o i ndic!f !d readina ba5 bb9 L'e;;reeS F Ihe NE 5 La f f e$ ti"a t Ed th] cubble S i /e in C5 (C' Fe about 1700 f t 3 a: d reques ted the licen:ce t'

re fine thei r ca lcula r.icn of tho bubale size.

th e c..h 3._1_

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psi.

bl 54h t (!rt p in p l 31s r ! 2 C r i e V l

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I r - l'O fl I l!I'.' 5 iU LIIe CCfe u "casured frem ihe incorn th;n 'nurin, ' re mwh:a l l y ': 'c rea s i ncy (o x i m.,

i n d i ca t e d a ba u t ~f "o F ).

Ih b de

' r'cc Minor '.u in an 7 e r 81 e s t a t.u s p u t,'of d i '. i n n a l a n i ? 1 :i"

.- o & r' and

,.1-trinq ch'.ained it.o sa Tim of cnn t li- "e n '.

,t re,2rc analyfod.hich s h ra., 2 d a h\\drOren ' :"' r c ' I !!ien j fi,'

?i i l.O Licen%?e CdlCulated bwble s ize to't;e Cu t G20 ft3 3 g;5 psic 118 351

e m

1 April I_

= uswuai cn in om ty mre "o - u -

'ncore thero noupies r.ontinue to shc! :cct ecod trend.'

!. i C C n c ' " CCn[in:J;_'d I;O'j! Up Of hyiltf (PD rf i'

' l ' I " r s : ' ' ' ') el'!'! I ' I O n O f

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s h i e l 'i i n g.

l. i cc oste cal c ula te'!

il t. 's o f h !tl e s. re m'bd.

Containuent air sa., ole' ind ica to ?.a-h:, h o:;e n.

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Pt.a c t o r e r,, <. u r e ; f.i'il e.l f. v.it I PO) ; ~. r.

I' Or2 ' h :' * - ' p le s _ nt.i:..;j

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,!>. a d >c re a:.0 w i th a i l usucr-sots !

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moi Inlet 'n! c:tlet I('.

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g; t f.t i *Qri ~., f]n ori(lin'.',

r.'i;,Mt'd. ' 'n i c. , ;. 3 i t,,t i ca t tj th i' - l ic M..ble,sig ' c i n '.; si' iiiicanti, r'duced- ' r i l _3-- } I ' ') k r 9 ) ',4 + ,ii-,.,g j,t b 'I ) I,' I -1 g'* ti l*'*#' F Tf -}, 1 fP, t f I' () +' a" ve,cfF r, n H. S ] e s j, ~ .u :- h i. s.." Cr n t a i men t,ac u t 1. T i g d f C y (' n. C;:e yr : ? > s u r i 2 j r-l t '. g ] i ngjcal,Tr f jjlrd /,pril 4 r <,a c t e r p re c s u ' > r. n ! t r

2. i t o r<,

' t-1 n at if~n p,i a,H ' r, rc c ctive]y. The ns,c o u pl e "n e 't erc ws :G0F

r. ' - h n L > 1.,

, 4 c. .cnt e n e en nressn m cc m, turn a _-yraci m. ty erm uen or <m.a and eerss ing unu nucs throur;h !e tdNn sy s Nn. Ap.r i l_ 5 I:.,1 c t o r r. c o c T u ra aH t:- ca h ro stahie i r. 'n mi in T ' "", r o r > - t i 3 ] t. [s

n. i t h. r, s c o., ?,

r, M i n" 7" Fo-- n! ro w w li s nor lily U prost'..ro c h a n ;:., s i n j i c a t i n g toc ;,'ri;"r 5 [u.d i e

s o r u t i ',-

FO('UCOd ( O 'I t l i n: n [ O I U C .: r d i n 'I i Ca ;O S 2' h :;i e c'q_ [ r )., c.- ,gg7 g,,,. 7, ,>c in cl.r M 'en-op-i. e c cot 4 g t.j,gg.'t 'cu t 15 iinutr O \\ " r ', 6 U I:^ tir. [0 Cl ;-13 ' j;e p r )pl:./ ; e 3 t 118 352

8 e, m 4 9 g m -1 h - I e IS'iic tor pi c;;Ure s table a t a!'ou t 1000 p > i and LcFpe r a t >2 rn i't,u t '/ E L O F, [t '~ a,n g c o,g h, f " ] -, 1. c. p ,n ' r i,,, n :' ^ic!'+ u (Ilh d Il flkI Ifl / ' /'l s ' r'! I ' ;' eI ) n " ')[l 'I Il'I i ' C) I 11 11.0 - =. CrUplC rC a fli n g5. IhO 'h?

f. b i r'P O ' O ','i l P S p t

'tU ily road 5DG a'JOUb <100 F are presently read 'g helm en W and 31 G F E <; n '. r a ! t he rt 'o - 0 0 cmple incr sed f rr n 3/E" '0 0 125 F and is t!v Only one ' ca ling <100 F, f), f. !), k5I 5 l) ') !) I, ) 1 [ 'f f ^ n, Lb. s p' Cp5 fly 1.d3!O glE d? C ly L 2 n k ', n ' z' 2 l ' ', N L l i l W C G I [' O fj < ! 'l. A:, r.i_l_ i g f, y t "or(j;cly, e '. ', g[ 0 ;t " ;,, t_ h, );< , -, [- ,,j (n _ }.; c- ,c s, g,,,, The sir. d.':rca " <", dol -n r<:ctcr n-nn ci e; ' r 'TO 'si inis c~ 3 5' D t/ j i } be cr; >'gd 7 [ g,3 q,.j l p,j 7p-j. e, e n 3 'LifiCdlicn t0 pre, ni !>, ;bl o for ,.i t, <, ~ ,;e , :, ;cn '<'^rs: 15es, i!viironcn C0f.:CN tra t inn i r. 'u h p ron'1ajp ,*. lc,. ' -....t.

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