ML19350A849
| ML19350A849 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/04/1981 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8103160986 | |
| Download: ML19350A849 (1) | |
Text
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JNTRAL FILES M%,
UNITED STAHS PDR:HQ y
[ig NUCLEAR REGULATORY COMMISSION R
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611 RYAN PLAZA DRIVE. SUITE 1000 ARUNGTON. TEXAS 76011
,,,g State March 4, 1981 Docket Nos.
50-313 50-368
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Arkansas Power and Light Company ATTN: Mr. William Cavanaugh III h
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jO Vice President of Generation
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and Construction N/
P. O. Box sol s
Little Rock, Arkansas 72203
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Gentlemen:
IE Bulletin 81-01 has been revised to change the identification of the power cactor facilities with construction permits to which the bulletin is applicaole. '
This enange does not affect your requirements with respect to the bulletin. As a result, the enclosed revised pages 5 and 6 are foraarded to you for infomation.
Should you have any questions regarding tnis bulletin revision, clease contact this office.
Sincerely, g, L,if. / ' '
I/s
' arl V.' Seyfrit /
Director
Enclosures:
1.
IE Sulletin No. 31-01 (with revised pages 5 and 6) 2.
List of Recently Issueo IE Sulletins cc:
James ?. O'Hanlon, Plant Manager Acxansas Nuc! ear One
?. 3. Box 508
?.ussellville, Arxansas 72S01 010816 0g
SSINS No.:
6820 Accession No.-
8005050075 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 81-01 January 27, 1981 Page 1 of 7 SURVEILLANCE OF MECHANICAL SNUBBERS Description of Circumstances:
Several instances of failures of mechanical snubbers supplied by International Nuclear Safeguards Corporation (INC) have been it.entified that indicate possible deficiencies in these snubbers.
A summary of the failures that have occurred is provided below:
1.
On August 9, 1974, the Tennessee Valley Authority submitted evs.
report BFAO-50-260/741W identifying 11 of 14 INC Model MSVA-1A snubbers that were found inoperable on Browns Ferry Nuclear Power Station Unit 2 and subsequently identified 5 of 14 inoperable units on Browns Ferry Nuclear Power Unit No 3.
All of these units were found to be frozen, and the cause was attributed to a failure to lubricate the parts during assembly.
The failed snubbers were replaced with new units produced by the same manufacturer.
2.
On April 12, 1976, the St. Lucie Plant Unit 1 facility of Florida Power and Light Company submitted event report No. 50-335-76-9 wherein five INC M3 del MSVA-1 snubbers were identified as inoperable because they were found to be frozen.
The failures were caused by oxidation on the internals and b) improper assembly.
All INC mechanical snubbers were replaced with units produced by another manufacturer.
3.
On April 8, 1977, Iowa Electric Light and Power Company submitted event report No. 77-23 for the Ouane Arnola Energy Center facility that identi-fied 13 INC Model 1MSVA-1 Type AS s.7ubbers to be frozen; the cause of failure was attributed to large amourts of interior oxidation.
The units were replaced with those produced by another manufacturer.
4.
On December 5,1979, personnel from the Nuclear Regulatory Commission visited Department of Energy (00E) facilities at Richland, Washington, to obtain information on DOE experience Test Facility (FFTF).
The D02-owned 4,000 mechanical pipe restra 4.us (sn DUPLICATE DOCUMENT FFTF examined more than 800 of these Entire document previously entered into system under:
bDYO$b 7T ANO No. of pages:
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