ML19281A074
| ML19281A074 | |
| Person / Time | |
|---|---|
| Issue date: | 02/12/1979 |
| From: | Pappas H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wright G ILLINOIS, STATE OF |
| References | |
| NUDOCS 7903060055 | |
| Download: ML19281A074 (2) | |
Text
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4 UNITED ST ATES c
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't NUCLE AR REGULATORY COMMISSION fI l$
j REGloN 111 t
799 ROoSEVE LT RO AD G LE N E LLYN, ILLINOIS 60137 g
FEB 12 379 State of Illinois Department of Public Health ATTN:
Mr. Gary N. Wright, Chief Division of Nuclear Safety 535 West Jefferson Street Springfield, IL 62761 Gentlemen:
The enclosed IE Information Notice No. 79-03 titled "Limitorque Valve Geared Limit Switch Lubricant" was sent to the following licensees on February 9, 1979:
American Electric Power Service Corporation Indiana and Michigan Power Company D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas & Electric Company Zimmer (50-358)
Cleveland Electric Illuminating Company Perry 1, 2 (50-440, 50-441)
Commonwealth Edison Company Braidwood 1, 2 (50-456, 50-457)
Byron 1, 2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249)
La Salle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company Big Rock Point (50-155)
Midland 1, 2 (50-329, 50-330)
Palisades (50-255)
Dairyland Power Cooperative LACBWR (50-409)
Detroit Edison Company Fermi 2 (50-341) 790306006
State of Illinois FEB 12.379 Illinois Power Company Clinton 1, 2 (50-461, 50-462)
Iowa Electric Light 6 Power Company Duane Arnold (50-331)
Northern Indiana Public Service Company Bailly (50-367)
Northern States Power Company Monticello (50-263)
Prairie Island 1, 2 (50-282, 50-306)
Tyrone Energy Park 1 (50-484)
Public Service of Indiana Marble Hill 1, 2 (50-546, 50-547)
Toledo Edison Company Davis-Besse 1 (50-346)
Union Electric Company Callaway 1, 2 (50-483, 50-486-)
Wisconsin Electric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305)
Sincerely, h
4 f Relen Pappas, Chief I
Administrative Branch
Enclosures:
1.
IE Information Notice No. 79-03 2.
List of IE Information Notices Issued in 1979 cc w/encls:
Central Files Reproduction Unit NRC 20b PDR Local PDR NSIC TIC D. W. Kane, Sargent and Lundy
J s-t U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT RECION III February 9, 1979 IE Information Notice No. 79-03 LIMITORQUE VALVE GEARED LIMIT S'w' ITCH LUBRICANT Description of Circumstances:
At Co=monwealth Edison reactors excessive failure rates of the Limitorque valve geared limit switches were being experienced.
Investigation revealed that the failure mode was a drying out and hardening of the Beacon 325 lubricant. Once hardening takes place, the brass gears within the limit switch become immobile and destroy themselves when an attempt is made to operate the valve.
The Limitorque Corporation has recoc= ended Mobilgrease 28 as a replacenent -
grease for switch applications where the temperature exceeds 140 degrees Fahrenheit. Tests conducted by Mobil and Limitorque Corporation indicate that Mobilgrease 28, in addition to having a superier temperature rating, will satisfy the same environ = ental conditions and meet the sa=e qualification parameters as Beacon 325-All licensee and construction permit holders should consider conducting a review to determine if Beacon.325 lubricant is being used in geared limit switches in environments conducive to drying out and subsequent hardeningaof the lubricant.
If conditions are found to be conducive to failures, consideration should be given to replacing the. grease with a more suitable grease.
This information.is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information-for possible_ applicability to their -facilities.
No. specific.
action or response is requested'at this time.
If further NRC evalua-tions so-indicate, an:IE-Circular _or Bulletin will-be issued to recom-mend or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Enclosure:
List of IE Information Notices Issued in 1979 7?oaI5b3s-P M
i IE Information Notice No. 79-03 February 9, 1979 LISTING OF IE INFORMATION NOTICES ISSUED IN 1979 Information Subject Date Issued To Notice No.
Issued 79-01 Bergen-Paterson Hydraulic 2/2/79 All power reactor Shock and Sway Arrestor facilities with an OL or a CP 79-02 Attempted Extortion -
2/2/79 All Fuel Facilities Low Enriched Uranium