ML19345G195
| ML19345G195 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 03/02/1981 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Burstein S WISCONSIN ELECTRIC POWER CO. |
| References | |
| NUDOCS 8103170030 | |
| Download: ML19345G195 (2) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION n
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GLEN ELLYN, ILLINOIS 60137 g
March 2, 1981 Gentlemen:
The enclosed IE Circular No. 81-03 is forwarded for your information.
No written response to this circular is required.
If you t:;ve any questions related to this matter, please contact this office.
Sincerely, ty-fl 0 A,h alAvr "
h#JamesG.Keppler Director
Enclosure:
IE Circular No. 81-03 8103170 @
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Docket No. 50-266 Docket No. 50-301 Wisconsin Electric Power Company ATTN:
Mr. Sol Burstein Executive Vice President Power Plants 231 West iiichigan Milwaukee, WI 53201 cc w/ nel:
G.
. Reed, Plant Manager ntral Files AD/ Licensing AD/ Ope,ating Reactors T. Colburn, ORB /NRR AEOD Resident Inspector, RIIJ f
TIC John J. Duffy, Chief Boiler c)
Inspector
,h Peter Anderson, Wisconsin's J
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g' Environmental Decade
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Stanley York, Chairman 3
i Public Service Commission U A gg* 1 5
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SSINS No.:
6820 Accession No.:
8005050075 IES 81-01 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHMGTON, D.C.
20555 January 27, 1981 IE Bulletin No. 81-01:
SURVEILLANCE OF MECHANICAL SNUBBERS Description of Circumstances:
Several instances of failures of mechanical snubbers supplied by Internatienal Nuclear Safeguards Corporation (INC) have been identified 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 event report BFAO-50-260/74'.W identifyins 11 of 14 INC Model MSVA-1A snubbers that were found inaperable on Browns Ferry Nuclear Power Station Unit 2 and subsequently identified 5 of 14 inoperable units on Brown ; 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 Florid. Power and Light Corporation submitted event report No. 50-335-76-9 wherein five INC Model MSVA-1 snubbers were identifiea as inoperable because they wers found to be frozen.
The failures were caused by oxidation on the internals
.and by, improper assembly. All.INC. mechanical snubbers were replaced with
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units produced by another manufacturer.
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3.
On April 8, 1977, Iowa Elect ic Light and Power Company submitted event report No. 77-23 for the Luane Arnold Energy Center facility that identi-fied 12 INC Model IMSVfs-1 Type AS snubbers to be frozen; the cause of failure was attributed to large amounts of interior oxidation. The units were replaced with.iiose produced by another manufacturer.
4.
On December 5, 1979, personnel from the Nuclear Regulatory Commission visited Department of Energy (DOE) facilities at Richland, Washington, to obtain information on DOE experience with INC snubbers at the Fast Flux Test Facility (FFTF).
The DOE-owned FFTF was equipped with more than 4,000 mechanical pipe restrafsts (snubbers) supplied by INC.
In 1978, FFTF examined more than 800 i from their installation and Q
DUPLICATE DOCUMENT were frozen. The plant was 9
seen no service and had bee d
Entire document previously environments for 1 to 2 yea j
entered into system under:
8005050075 kk ANO cx -
. Attach:nent:
Recently is'ued 15 bulietins No of pages:
7 s
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