ML19339C975
| ML19339C975 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/27/1981 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8102130030 | |
| Download: ML19339C975 (1) | |
Text
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UNITED STATES PDR:HQ h
NUCLEAR REGULATORY COMMISSION "p
j REGloN IV
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$11 RYAN Pt.AZA ORIVE. SulTE 1000
,a ARUNGToN, TEXAS 76011 STATE January 27, 1.981 Occket Nos.
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Arkansas Power and Light Company WT ATTN:
Mr. William Cavanaugh III Vice President of Generation pr3 07 gg\\r't '
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and Construction P. O. Box col (r ggjf S
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Little Rock, Arkansas 72203
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4' Gentlemen:
The enclosed IE Sulletin No. 31-01 is forwarced for your action with regard to your nuclear power facilities.
To assist the NRC in evaluating the value/ impact of each bulletin on all licensees, it would be helpful if you would provide an estimate of the manpower expenced in the review and preparation of the report (s) required by tne bulletin.
Please estimate separately the manpower associated with corrective actions required by this bulletin.
Should you have any questions regarding this bulletin or the actions required of you, please contact this office.
Sincerely, f'!
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/Kai 1 ~V. Seyfri.
Director
Enclosures:
1.
List of Recently issued IE Bulletins James ?. O'Hanlon, Plant Manager Arkansas Nuclear One
?. O. Sox 508 Russellville, Arkansas 72301 810213 0 D%
l 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 Descr'otion 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. ave occurred is provided below:
1.
On August 9, 1974, the Tennessee Valley Authority submitted event 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 Model 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 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. "7-23 for the Ouane Arnold Energy Center facility that identi-fied 13 INC Model 1MSVA-1 Type AS snubbers to be frozen; the cause of failure was attributed 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 00E experience Test Facility (FFTF).
The DOE-owned 4,000 mechanical pipe restraints (sn DUPLICATE DOCUMENT FFTF examined more than 800 of these Entire document previously entered into system under:^
BOYO $b 75 ANO No. of pages:
.