ML19209B044
| ML19209B044 | |
| Person / Time | |
|---|---|
| Issue date: | 09/24/1979 |
| From: | Pappas H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wright G ILLINOIS, STATE OF |
| References | |
| NUDOCS 7910090036 | |
| Download: ML19209B044 (2) | |
Text
Y/C
'o UNITED STATES NUCLEAR REGULATORY COMMISSION
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.t REGION 111 b[
799 ROOSEVELT ROAD 0,
GLEN ELLYN. lLLINOIS 60137 o
SEPP 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 Circular No. 79-20 titled " Failure Of GTE Sylvania Relay, Type PM Bulletin 7305, Catalog SU12-11-AC With A 120V AC Coil" was sent to the following licensees on September 24, 1979, for information:
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)
Illf: ^is Power Company Clinton 1, 2 (50-461, 50-462) 1114 302 ON 7910090
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State of Illinois
- Iowa Electric Light & 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)
Ohio Edison Company Erie 1, 2 (50-580, 50-581)
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 Eler:tric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305)
Sincerely, YLLY G/2/ W Helen Pappas, Chief Administrative Branch
Enclosure:
IE Circular No. 79-20 cc w/ encl:
lir. D. W. Kane,
Sargent & Lundy Central Files Reproduction Unit NRC 20b Local PDR NSIC TIC
~1114 303
Accession No.: 7908220118 SSINS No.: 6830 UNITED STATES NUCLEAR REGULATORY C0FHISSION Dn DFFICE OF INSPECTION AND ENFORCEMENT {'y h
WASHINGTON, D. C.
20555 Ulli September 24, 1979 IE Circular No. 79-20 FAILURE OF GTE SYLVANIA RELAY, TYPE PM BULLETIN 7305, CATALOG SU12-11-AC WITH A 120V AC COIL Description of Circumstances:
During inspection of relays'in the Engineered safeguards Actuation System at Metropolitan Edison Three Mile Island Nuclear Station Unit #1, relay 62X28/RCIA failed to drop out when the coil was deenergized. The failed relay would not prevent component starting but would have reduced the 2 of 3 coincidence logic to 2 of 2, affecting Decay Heat Closed Cooling Pump A and Nuclear Services Closed Cooling Pump A or B.
The cause for failure was attributed to a notch in the armature operating rod. The notch occurs where the rod vibrates against the magnet assembly due to coil hum.
A review of the history of this component indicates that similar relays failed during 1977 through 1979 at least one of which was attributed to notching. An inspection of forty-eight (48) relays by this licensee indicated that twenty-five (25) of the relays had detectable notches ranging from 0.001 to 0.003 inches deep.
Recommended Actions for Licensees' Consideration:
1.
Ensure that all GTE Sylvania Relays Type PM Bulletin 7305, with a 120V AC Coil used ir. or affecting the operation of safety-relsted equipment are examined to ensure that the armature operating rod is not notched and is operating freely.
2.
Relays found with detectable notches on the operating rod should be corrected.
If correction cannot be accomplished then administrative controls should be initiated to assure demonstrated operation until the relay condition is corrected.
No written response to this Circular is required.
If you require additional information regarding this subject, contact the Director of the appropriate NRC Regional Office.
Enclosure:
List of IE Circulars
- Issued in the Last 6 Months
- .p 1114 304
IE Circular No. 79-20 l
j Enclosure September 24, 1979 Page 1 of 2 LISTING 0F IE CIRCULARS ISSUED IN LAST SIX MONTHS Circular Subject Date of Issued to No.
Issue 03 Inadequste Guard Training-2/23/79 All Holders of Qualification and Falsified and applicants Training Records for Special Nuclear Material Licenses in Safeguards Group I 79-04 Loose Locking Nut On 3/16/79 All Holders of Limitorque Valve Reactor OLs or cps Operators 79-05 Moisture Leakage In 3/20/73 All Holders of Stranded Wire Conductors Reactor OLs or cps 79-06 Failure to Use Syringe 4/19/79 All Holders of and Bottle Shields in Medical Licensees Nuclear Medicine except teletherapy licensees 79-07 Unexpected Speed Increase 5/2/79 All Holders of of Reactor Recirculation BWR OL's or CP's MG Set Resulted in Reactor Power Increase 79-08 Attempted Extortion - Low S/18/79 All Fuel Facilities Enriched Uranium Licensed by HRC 79-09 Occurrences of Split or 6/22/79 All Materials Punctured Regulator Diaphragms Priority I, Fuel In Certain Self Contained Cycle and Operating Breathing Apparatus Reactor Licensees 6/26/79 All Power Reactor 79-10 Pipefittings Manufactured from Unacceptabic Material Licensees with a CP and/or OL 79-11 Design / Construction 6/27/79 All Applicants Interface Problem for, and Holders of Power Reactor cps 1114 30S
IE Circular No. 79-20 bg Enclosure September 24, 1979
' 0131 i
Page 2 of 2 LISTING OF IE CIRCULARS ISSUED IN LAST SIX MONTHS Circular Subject Date of Issued to No.
Issued 79-12 Potential Diesel Generator 6/28n9 All Power Reactors Turbocharger Problem Operating Facilities and a" Utilities having a CP 79-13 Replacement of Diesel 7/10n9 All Power Reactor Fire Pump Starting Operating Facilities Contactors and all Utilities having a CP 79-14 Unauthorized Procurement and 7/13n9 All Medical Licensees Distribution of XE-133 except Teletheraphy Medical Licensees and to all Radiopharmaceu-tical Suppliers 79-15 Bursting of High Pressure Hose 8/8/79 All Materials Priority I, and Malfunction of Relief Fuel Cycle and Operating Valve "0" Ring in Certain Self-Power Reactor Licensees Contained Breathing Apparatus 79-16 Excessive Radiation Exposures 8/16n9 All Radiography To Members Of The General Public Licensees And A Radiographer 79-17 Contact Problem in SB-12 8/14n9 All Power-Reactor Switches on General Electric Licensees with a CP Company Metalclad Circuit and/or OL Breakers 79-18 Proper Installation of 9/10n9 All Holders of a Target Rock Safety-Relief Power Reactor OL Valves or CP 79-19 Loose Locking Devices on 9/13n9 All Power Reactor Ingersoll-Rand Pumps Operating facilities and all utilities having a CP i
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