ML20072A101
| ML20072A101 | |
| Person / Time | |
|---|---|
| Site: | 05000054 |
| Issue date: | 06/02/1983 |
| From: | Ruzicka W UNION CARBIDE CORP. |
| To: | Thomas C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8306090364 | |
| Download: ML20072A101 (1) | |
Text
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UNION CARBIDE CORPORATION P.O. BOX 324 TUXEDO, NEW YORK 10987 MEDICAL PRODUCTS OlVISION TELEPHONE NUMBER: (G14) 351 - 2131 June 2, 1983 Mr. Cecil 0. Thomas, Chief StancaIds ano Special Project Branch
.,5 Division of Licensing Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Thomas:
This letter is being sent to inform the Nuclear Regulatory Commission
'that the Union Carbide Nuclear Reactor is changing its fuel element cladding material. Our operating license tecMical specifications require our fuel cladding to be of high purity aluminum. We consider this new cladding material to meet this requirement.
i We have in the past and are presently using MTR type fuel elements clad with series 1100 aluminum alloy or its equivalent. We recently contracted Babcock and Wilcox of Lynchburg, Virginia to fabricate our next order of fuel. This new order of fuel will utilize series 6061 aluminum cladding. We consider both series 1100 and 6061 to be high purity aluminum alloys which therefore meets the tecMical specification Iequirement.
Alloy 6061 is approximately 97.25 peIcent aluminum with tractional percentages of copper, silicon, magnesium, and manganese. Alloy 1100 is 99 percent aluminum. Series 6061's composition makes it a harcer alloy I
than series 1100 which makes 6061 less prone to claading surf ace camage.
Babcock and Wilcox is presently f abricating fuel elements utilizing 6061 cladding for its current Oak Ridge National Lab contract. Excellent past performance has also been cemonstrated with 6061 cladding in numerous national lab research reactors incluaing the ORR, HFIR, BSR, OWR, ano HFBR reactors.
We have discussed this change in claading alloy with Mr. H. BernaIo of your office. This letter documents the UCNR position as discussed with Mr. Bernard.
Sincerely, l
a>. s. G2m.A William G. Ruzicka Reactor Supervisor l
r306090364 830602 PDR ADOCK 05000054 yo
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