ML20112B189
| ML20112B189 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/25/1985 |
| From: | Specter A SENATE |
| To: | NRC |
| Shared Package | |
| ML20112B177 | List: |
| References | |
| NUDOCS 8503190064 | |
| Download: ML20112B189 (2) | |
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F.espectfully referred to:
Nuclear Regulatory Commissi'on 1717 H Street, N.W.
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i Eecause of the desire of this office to be respcnsive to all inquirics and cc==unications, ycur censideration of the attached is requested.
Ycur findings and viers, in duplicate for=, alcng with return of the encicsure, will be appreciated by I
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P. O. Box 268 Middletown, PA 17057 E;5 J.'.:! l8 l,:; c: 55 Senator Arlen Specter Senate Office Building Washington, DC 20510
Dear Senator Specter:
A member of the Nuclear Regulatory Commission, Commissioner Asselstine, has proposed that tube failure at Three Mile Island Unit One be investi-gated. However, we are uncertain as to whether the other NRC Commissioners will agree to investigating this matter.
We strongly urge that you request the NRC Commissioners investigate the causes and consequences of tube failure at Three Mile Island Unit One.
A partial list of questions concerning the failure that we urge you obtain answers to include:
a.
What mechanism caused tube failure?
b.
Is tube strength ~ sufficient for reactor operation?
c.
Will tube failure become a reoccurring proble,m?
d.
Is safety compromised by tube failure?
We are urging that you request an investigation into tube failure and especially consider the safety consequences of tube failure.
Sincerely, Albert J. Manik Enclosure (Asselstine Memorandum)
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NUCLEAR REGULATORY COMMISSION E ;, 3*M,nE wAssincTON D.C.20555 he
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cFFICE OF THE December 19, 1984 coMMIS$10NER
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MEMORANDUM FOR:
Wi.lliam J. Dircks 5RMCH Executive Director for Operations FROM:
James K. Asselstine M ' --
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SUBJECT:
TMI-1 STEAM GENERATOR TUBE DEFECTS The Weekly Infomation Report dated November 29, 1984 (SECY 84-451)
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contains a summary of the then available information regarding TMI-I steam
. generator tube defects.
The summary indicates that most of the new defects were in the tube free span near the top of the tubes around the periphery of the tube handle.
I would appreciate responses to the following.
1.
To what extent has this type of defect (in terms of location, nature, and apparent speed of the deterioration) been foun through steam generators of B&W designed plants?
t 2.
Has staff confidently ruled out the possibility of the prior sulfur contamination of the TMI-I reactor coolant system as,a cause of the l, e defects?
If not, what is t:ie staff plan a'nd schedule for resolving this?
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If staff has ruled out sulfur as a cause of the defects, what is the basis?
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Why were these defects not found in earlier eddy current tests of the tubes?
cc:
Chainnan Palladino Comissioner Roberts Commissioner Bernthal Commissioner Zech SECY OPE OGC Q'Q [~f.&
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