ML20083L745
| ML20083L745 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/27/1982 |
| From: | Lewis M LEWIS, M. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20079G498 | List:
|
| References | |
| FOIA-83-243, FOIA-83-A-18 NUDOCS 8207300136 | |
| Download: ML20083L745 (3) | |
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m Iher Birs This letter someerne oortain aspect et the steen goes: star eserosian at TMW1
. hich este the thional;hete theory suspeet a causessess2y the emme fasta w
a*=1 otbar facta sake the explosias asynesias: regair of TMy1 both suspect ami d:nprous.
I attended the crai procentation af Postar Wheeler and CPU before you on er abr.it the 29th of Ju=e at 7735 Cecresteun Road, Room 6110. Soes of the fr.cta la this lettar vers boud f 2 tlat 3rsentatico. I also meet a postcard to cit!--*W 1sfor::stion about the recent tests doce on the inter:nts af the Incetar Freasure Vassol at TlC1. GI"fs 17 EyWim sont me a Cyg mous ralense dated my '(,1932,in,agwer to my postcard. T.iis asse release hQi, up aans.of er other ob>2tiene to the thi=supate thenry.
I have been most suspect of the thionalptate theory far the following reasones
- 1. The thiosul; tate thacry is not escissiccar/. The sulgfzur wA seen 12, the Stana grazratar do adIhe.ve to ocae face the thissniphate which was cr use not landvertantly introdmood into the EPT. Further t'a thiaouptate theory does not look sit etay.c sources of sa1 trar.
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- 2. The thiosulstate theery does not explain the snount and source et ohlerine
.t th:t ig also 3 resent la the staan generatar onz=caion.
3 Cas etmas sucratar hos a tiltad gattern of enerosion. Again the thiosa13 hate thaczy doce sol explain this F-- = 2 at all.
8 The above reasons ooms from the TTt#1 steam Cameratar Status asports.
b. This reanoa to suspeet the thiosu1@ste theory comes direstly free Esary Enkillaf GPUIC la the by 7 cpu 5ese Relansa.
"Weare very slassed with the resulte of the tent pregras, v'.det elearly dessestzste l
l tht i:.a carrosion probles has not affected the runctar veneel's intersale.* The I,
l genetion than arises,* Des saa tape thionalplate hcas corrobd the stesa ganeratoes '
y so bally'and left g affect on the reestar prne.sre internalet* Surely there smet be at least a tease et sulphiar spea the runster prees"ure lat&enalet
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Ccaseteent2p these facia and others anks the zwpair of the steam gweerater tabing a very gasetionable and potentially dangerous ydartaking.
- 5. The Stasa Geoscatar MostAly States Reports have potatei out that the alloys vers
- eensitised thru outdated heat trentaosts to intergraanlar attack. These sensitised satorials sad alley sillaat he roasted,' but will contimes la serviae if THW1 la allowed to operata.
This la et most dangerous oitantian..
6 If the posent station exista at restart, what ever enamed the warrasiasi may act have been disoarerod and sorrected. The above facts suggest that tthe cause of the carrosion is not thios4 hate, which kna been carrected.
The smoorrected esame or the oarrosion then could emaily continas and esame even more dangerome mischist.
- 7. The explosive orgnasion resmir at the geassatar tubing will provide only a
==awwi seal at the taking 1-wt the +=wwt.
r this is a new method auch different.
, than the former astbod af erMas na fasert against the present taking. The representative from Fontar Wheelar admitted that the grenset testing is only lacking at a differonne la tamparature beW the taking ami the WW of SOF.
Es also admitted that a difference in temperstare betacea ths' tubing and the
$awh*=t af esveral hundred degrees oonld esame leaking. I have not seen any analysis to suggest that the differeno da temperature betmoon taking'and
'+=wh==4 aould not and would not get into the kastrods of degrees zaago taring certala treasiasts, such na Gizan han emperienced.
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- 8. :be offset af stena geanzator trassienta upon-the pT5 problem kna mot teen expiaced in the stana ceassatar neathly status separas.
The danger tgat a pectly repaired steam geneestar oca3d prodeos -
tamaniasta that
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weeld cause pT5 involvenest must be arplared.
I For the above reamcas, I roepectfully request that W eoes not put its stamp at appressi on the sufi steam seassatar rosair.
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David Osterhout
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- e. n g.v 3 Riddletoun, PA - limes Nile Island technicians put the 140 tes heed bact on the unit 1 reactor this merstag, after a successful series of inspections and k
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puring the past three uneks. over 1,000 individual parts aero seemined a
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, estag a' wide range of tests.
!a each case the result uns the same: the corrosion anchenism that damaged the unit I steam generators did not affect the reactor
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and its internal parts.
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By sie morning todity the head had been returned to the reactor vesael.
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, Technicians will finish related reactor need reinstallation work dortog the next
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WU Iluclear Caryoration ordered the test and inspection progree as a pre-ga caution after the corrosion. mechanism, called charf'cally assisted intergreneler
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' attach wa.s found to have damaged thowsonds of,the 31,000 heat eschenge tubes in
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thit l's.tus steen generators... Because the corrosion went.from the. reactor - g}r g
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primiuy - side of $he heat eschenge, tubes to the, secondary side, company officials E
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,3 decided to conduct fu11 scale. tests; of,cempenents in the primary systas.
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- N are Dery* plea' sed with the Pesults 'of the test program, iditch clearly f.i y
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T demonstrate that the corrosion problem has not'aflected tb2 reactor vessel's h~
jnternals." commented Henry Mukill,' director,of,TMI,1.. "We can_ now direct our i.s
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v full resources to the repair. of the steam generator tubes with confidence that
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]/ y-y the problem is limited to that specific area of the plant.'
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