ML19345G202
| ML19345G202 | |
| Person / Time | |
|---|---|
| Site: | Atlantic Nuclear Power Plant  |
| Issue date: | 03/04/1981 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Collier A OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI |
| References | |
| NUDOCS 8103170052 | |
| Download: ML19345G202 (1) | |
Text
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p2f.Etoq 4-UNITED STATES
!" " [f g NUCLEAR REGULATORY COMMISSION c
REGION ll k
101 MARIETTA ST., N.W., SulTE 3100 4
ATLANTA, GEORGIA 30303 MAR 4 1981 iy s
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In Reply Refer To:
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ATTN:
A. R. Collier, President s
P. O. Box 8000 y
Jacksonville, FL 32211 Gentlemen:
IE Bulletin 81-01 has been revisad to change the identification of the power reactor facilities with construction permits to which the bulletir is applicable.
This change does not affect your requirements with respect to the bulletin. As a result, the enclosed revised pages 5 and 6 are forwarded to you for inforration.
Should you have any questions regarding this bulletin revision, please contact this office.
Sincerely, w0
%" W James P. O'Reilly Director
Enclosures:
1.
IE Bulletin No. 81-01 with revised' pages 5 and 6 2.
List of Recently Issued IE Bulletins k
8103170p $ Q.
SSlNS No.:
6820 Accession No.:
8005050075 IEB 81-01 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 ddnuary 27, 1981 IE Bulletin Nc,. 81-01:
SURVEILLANCE OF MECHANICAL SNUBBERS Descriptioy of Circumstances:
Several instances of failures of mechanical snubbers supplied by International Nuclear Safeguards Corporation (INC) have been identified that indicate possible deficiencies in these snubbers. A summary of the failures that have cccurred is provided below:
1.
On August 9, 1974, the Ter.nessee Valley Authority submitted event report BFA0-50-260/741W identifyir; 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 I facility of Florida Power and Lir.ht Corporation submitted event report No. 50-335-76-9 wherein five INC Mo.el MSVA-1 snubbers were identified as inoperable because they were found to be frozen.
The failures were caused by oxidation on the internals
.and by.inproper assembly. All,INC. mechanical snubbers were replaced with units p'roduced by ano'ther manufacturer.
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3.
On April 8, 1977, Iowa Electric Light and Power Company submitted event l
report No. 77-23 for the Duane Arnold Energy Center facility that identi-fied 13 INC Model 1MSVA-1 Type AS snubbers to be frozen; the cause of failure was attriouted to large amounts 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 (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 restraints (snubbers) supplied by INC.
In 1978, FFTF examined more than uvv q
from their installation and ?*!
DUPLICATE DOCUMENT were frozen. The plant was seen no service and had bee N
Entire document previously envi onments for 1 to 2 yea i
entared into system under:
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Recently is' ued IE bulietins No. of pages:
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