ML20136A862

Submits Written Record of 790404-05 Actions Re TMI Event: Obtained Info from B&W Re Plant Sys Affected by Incident. Handwritten Notes Encl

ML20136A862
Person / Time
Site:	Crane
Issue date:	05/02/1979
From:	Cherny F Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TASK-TF, TASK-TMM NUDOCS 7907120240
Download: ML20136A862 (13)

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rant : Of *,,rtl 1, 1)T) to /A : iff A2 r M;?sted by the r2f 2ren :j....se:rt.m. I La :.c ra i n f....c.;r ti ng veral..;uccts far infer stf:n ich !

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'.c dat:in 1;ril 4-5,19 79 fr:a.'.2 Dbc :c'<.

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Co April 4,197'), J. Kni;5t as c:atactej 5y 1212;':r.c fr:m th? 13C by F. Ochrcidar 3r.) ;25 3sied to catsin the f:110,ing i;far.ition t

fr m Cabcock and Wil:n ra12 ting to c:.:;cacnts Ort:1121 at the t

Thr:2 "ile "slind 'Jnit 2 [TM!-2.) f2cility:

11 nc.< icag..ould the pressurizer heatars functivn in a sa;arheated

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steam atras;her if they beco: e unc:<cred?

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2) At hat sy: tam U n :are :uld 'he r:3ct:r n111t ;_ o sals fill ?

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3) What is the liiaf tir.g c:mp>nent of :he Tu!-2 ;r?ssuri:2r for F

pressure loading, i.e., nhat part of the ;rosari: r :uld be expacted to fall first fr:1 ;ressLee loading?

I SLbse;;ently, Mr. Knight discussed these qu:stiens with R. Casaak and U

myscif Ard asked that I tbtain the inforrition througn "r. J. Taylor

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af the Secock ind Wilcox f acility in Lyncnburg, Va.

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Around P.o:q of April 4. R. Besnak and I tale;h: red."e. T2., lor.50 L

was tem;crarily unavailable but retar..cd our call -ithin in '.r or so.

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From this point on,1.1s the sole rt3 tele;htne c:Pt3ct

,i*.h H W On the:e and se<cesl other relat2d ;uestiens.

..Le n :'F. Tay1 r

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returned our call, he fasignated a Mr..ta.e "ars as the ;2r : 9

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fr:m MW 90 w;1d pr:<ide the reque:ted infa uti:9 f

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.? ? 13 l j o y a f ;he ~~MI-2 F S to.

I c:rti:nad to him t..it l nad astSlie.had a toi ?ph:aa c:ntact t.ith s;W ind 2s : 7. lining iaf ar 4 tion $3c.it ;r.?s:;riter h:C.ar service li fe, if g

- : :-:d '.nd in i stc:n..uira, rant. M2 :' c al at.';r g

s :.2 pic'.t. ic s v2uics '.e als irg, it

! j 5 2 d,zful if N2 c0uld ha.e acs.. rs ta tha fol!

,ing:

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.4t is tatal nu-$er of IM!-2 pres: art:ar ';2 tar

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reds?

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ihat is the total rass of the TMI-2 prescuri:tr heater h.

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11 np hat is the heat inpJt of a ch T"I-2 hotter rod?

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F I stated that since I had sleeady establishof a centact with

]L 2!'.I r?23rding heater service life ! ',ould try to also cbtain the additi ral information. Shortly af tar I '05 cont 3cted b

by Mr. P. Cheuransit of the Plant Syste+s 3 ranch of OCR who Oce ed to be interested 3:nerally in the same ty;.2 of

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inf;r ation as "r.

Cheran. I tsid him that ! :ald inf:rm 3.

hi.a of ar.ything I could 12arn '.ith cojard ;o the ;re:r rizer S-t:rs.

p tround mid-af teracon of April 4, I tele;5cn:d 34W and r:13 tad the addittenal questions to D. " irs.

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F tate in the -af terr;:n of Apet14, BsW calicd tack with scme L

information roga. ding the pres:Wr e ca;43 fli'.y of the TMI-2

[j reictor c;clant pump. The attacN:d hand written rotes contain more datalled, dati, but tr.e basic r.?s:ag? cors:yed

l by 33W tas that at bcut 3:30 ;si system pressure the pu p u; par bearing ecuid pr;bacly Overheat.

'he ; ump is t

1;ui;;2d.'ith three full ystam pressare seals a*d c: ;?ete

~ 11ure of all three w:uld not be espected bafore :5 cut t]

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47:0 ;si.

S'N cermitted to provida e witn the talarco of p

the information by phone at home later in the evenin;.

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jio 60!y to F. Sc" ;. 2r it

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. ;ld lif t it 25:0 rii 9d J.id,.. t; s ricar

-'ssure frem

f e) acn hi;her if ' tat ts a c;nc:en.

o "r. Maigh t inf 3r 2d F. Ic r,:dar '. hit I *uld, ne 'he an..ces to 'ha.:st af Lis p:st':.s t3 545 it

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12.! c ille d.r.o l a tar ".13 t e. ani ng.

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0 A t 7:05 pa, 3 5W (D.."ars, M. :scret, J.

titc>.;m and F. Rains) 7

,.Or.ed me at 5:*e.

The folici.f.1; fr.iercatica.as provided:

1) The TMI.2 pr:s: ri:2r heat r rods..er? f ii; 2d to o;2 rate f

submerged in sater. Sfl "a.s no data as to how the r:ds :ald perform in a su;2rheated or saturtt:d st?), e n v i r:r.:O n t.

'i The rods have b:2n tested in air and lost 2:ut

• o micates i

uncovered. E!W esticates chat in a si;;m en,f r? ent 6

t:4cir life et pectar.ca.:uld ;r:batly 5e less than in air.

h 33W estimated that at :. 2 ic;.er than full cic.:rical k

input the netters would ;r-tably functicn indaf f nitaly,

'l but ' hey had not deternfr.ed.. hat that input s.as.

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isked me if I th:v;5t they sh;uld dater.nine it, and l'

noted it would require a fairly large cm putati:n tl affort to do 50.

I r?;utsted that th:y da so and "se

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the resperse to me :n the ?:rning of 4-5-17.

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2) As far as the 'aeakest' pcrtions of the ;rtssorizer for pressure loading 5.as concerr.ed, siV advised that 'he gasket sealing the mar ay access c]ver near the top of the vessel would fail first fr:m high pressure folloited by the seal welds of the Pester rods to the vessel paretrations. They advis?d that they were calculating the exact failure pressures :cd i.culd inform l"

ma of their values on April 5,1979.

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3) :ith ra;ard to the pe?s:urf ter heat:r cerical and functional data that "r. S'Orsn : d Mr. Ikew anski

e were interested in, I was inf:r:2J as folicas:

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File Tf 2 d3 a) Er:n b:)t2r :i :as 3.n 1,tical _' st f it CA.

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5) R:r? :re 19 leat2rs in c2:3 52ndle.

Y c) T:.J ' nal heater cutNt of each '.undle is 7633 rg, d) The total mss of the heater cads is 3'37 lb. aad

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each Mater rod weigns 10 lb.

The total mass irclu 2s 59 f.; rt pl a tes, etc.

l fr"adiately af ter.hc 3f4 call I tele;hened F. Schreeder at she I?,C a.id ga,e him the inf raation ;ce ite s 1 and 2 cove Nich he ' rad requested. I ret:1 that STJ..as g:f#g t3 try k.-

ta d2t:rmir.e it ohat reduccd pc.ar in;;t tho ;cessurf:ar p

heatars c0uld operate unc:vered iridefinitely, but tas:d On eur discussien I had the impression that 02taining this r

inf:rmatien was not a high priority it:a at the AC.

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The rext acrr.f r.g I conveyed the information on the h:ater 5

rods par f *em 3 Bave to both *r. Shcr:n and t'r. f50-anski.

Af tar conveying this information, either Mr. Sheren, "r.

{j Cha.manski or both, I cannot r2 call at this writing and ry notes do not indicate, but in any event, discussi:ns with

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Sc;h indicated a naed for the follo4f n3 additicr,al clari7i;;ti:ns and i..fcrration on the pressuri:ct hanter rods:

I Oces each single heater r:d bundle containing 13 rods I

weign 337 lb. or is this the total weignt of the ;9 rods?

'.l hat is the dic. meter of each heater rod? 'that is the Mtch that the rods are installed on?

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'Jhat grameters are being reasured in the rea: r c:olant l,

system for cycling the h2aters on an,of f ?

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t.ater in the day 514 called :? 5 ack (af t2rr.acn ;nd C.

'ars, I :;lia.e)

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with the folic.ing res;:nSes:

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Each pressurizer heater bundle of 13 r:ds wei;hs $37 lb.

The diameter of each rod is 0.560 plus cr mir.us 0.0C5 inches.

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~h: a'.se r0d s

1. e i's t il' : f ;a a d upiir i':n ;f 2.3/5 l-

'. 25 2,tcr to :qt;r.

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hrf-] : 11 ;i. t cy:rni;o ha 7:r:.i:;r at:rs.. la l

n.nd

f in 2s; use t

,. :s u:2 c a s a r :

t, ;.1f.

l dl+ctric-311y sadir; she thrce ;rcups of :.tcr rafs ;re

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wired ir.to four baris as ic11ces:

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EK fl - 126 C.I ca;2 city cycles :n at 2135 psi and off at 21:5 ;;f.

EX 52 - 504 G capcity - cycles :n at 2120 ;si :nd off at 2140 psi.

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EK 73 - 504 G cancity - cjclas :n at 2115 ;si and of f at 2125 ;si.

p EK !4 - 504 G cancity - cycles en at 2100 ;si and q

of f at 2130 ;si.

I ::nveyed ;his inf:ruaticn to botn :'r. Sharon and Mr.

Ch ec.Lis k i.

L3ter that svening I was contacted at hc;;e by a !!r. F.

P lkFadden of !!W.vith the fclic.eing inf:rmation rs;arding

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the fatture ;rcssures for pressurizer vessal c:r;cnents:

i Prvey C ver Gasket - 3500 psi Seal Walds on : Oater tods - Sf;nificantly hi;5er but

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not qu;ntified.

1 I queri?d Mr 'kF3dden deut the status of the daterni. cation

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3 of the reduced peaer input at..hich the pressurizer hatters could be o;2 rated at indefinitely 3 staa.n envircnnent.

He indicated that he did not think cuch proycss had been cade on this due to other high priority activities. Iecause i

th2re did not appar to be in cr;snt no?d fsr this infor ati:n bas 2d on all the discussions ! kad ;:rtici;3t?d in. I told Mr. I':Fidden that I felt they sh:uld s;2rd c:cir tfms

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in other areas.nless -e called *ha back and 7t;ressly requested they prcceed.ith the f ater.inatien.

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to the i.RC 5:.':50 it :. :-j f. r?l a tint in :f. i of

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ets strince s t raty.??,2' set-point o f 7

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-i F. C. Cherny, S:ction \\m tv:Mer 5'echanical Enginearir.; Seancn Divi:icn of Syst:cs Safety cc.:latt:

D. Cratchfiald, f3R cc w/o att:

F. Schroeder, 055 J. Knight, DSS R. 30snak, 055 S. Sharon, DSS P. Shev.manski, 00R k

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