ML19249B682
| ML19249B682 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 08/14/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Koester G KANSAS GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7909040665 | |
| Download: ML19249B682 (1) | |
Text
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- e cq"'c UNI T ED STATES
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NUCLE AR REGULATORY COMMISSION
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'E 611 RYAN PL AZA DRIVE, SUITE 1000 o, -;4LJ -
,I AR LINGToN, TE X AS 76012 6
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August 14, 1979 In Reply Refer To:
RIV Docket No.
n.. cu-482/IE Circular No. 79-17 Kansas Gas 5 Electric Co.
Attn:
Mr. Glenn L. Koester
'. ice President-Operations Post Office Box 203 Wichita, r:ansas 67201 Gentlemen:
This IE Circular is provided as an early notification of a possible 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 evaluations so indicate, an IE Bulletin will be issued to reconcend or request specific licensee actions.
If you have questions regarding this natter, please contact the Director of the appropriate NRC Regional Office.
Sincerely 7
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tarl V. Seyfrit Director
Enclosures:
1.
IE Circular No. 79-17 2.
List of lE Circulars Issued in the Last 6 Months cc: w/ enclosures Messrs.
Nicholas A. Petrick, SNUPPS D. T. McPhee, Kansas City Power and Light Company Gerald Charnoff, Shaw, Pittman, Potts & Trowbridge E. W. Creel, Kansas Gas and Eicctric Company f'
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UNITED STATES NUCLEAR REGULATORY COBLMISSION OFFICE OF INSPECTION AND ENFORCEPENT WASHINGTON, D.C.
20555 IE Circular No. 79-17 Date: August 14, 1979 Page 1 of I COE_C _J:m! IN 53-12 5%'ITCIES ON GENERAL ELECTRIC flETALCLAD CIRCUIT BRE. C :
The C---- ni Electric C =pany, Switchgear Departmeat in Philadelphia, reported to the XEC :n July 3,1979,, an intermittent, contact problem in SB-12 switches.
This inte--"ttent contact problem will cause a lack of continuity through the "a"
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o f the switch that is used to energize the trip coil of the circuit breake.
Investigation disolosed that a die used to form a hole in the contact arms of the switch had worn, resulting in elongated holes.
This condition could permit the contact bridge member to move laterally relative to the contact arm, occasionally resulting in improper "a" contact wipe.
The worn die has been corrected, and all switches shipped on or af ter July 1, 1979, include this co r rec t.ic a. A review of the history of these components indicates that switches shipped in the time period of August 1,1978 to Ju!y 1, 1979, could have this problem. The trip coil and auxiliary switch portion of the trip circuit is monitored for continuity by a red light on the front door of the switchgear.
This light is lit.when.the breaker is closed 'nd the control circuits are energized.
If the red light is lit, this inc. cates that the "a" contacts of the switch are closed, and that a trip signal will trip the breaker.
Based on the above, the licensees are advised to do the fol' lowing:
1.
Insure that all General Electric Company tietalclad Circuit Breakers shipped to your facilities during the period from August 1, 1978 to July 1, 1979 and used in or affecting the operation of safety related equipment are furnished with new SB-12 control switches as promptly as possible.
2.
Pending replacement of SB-12 control switches, administrative controls should be initiated to assure the red light which demonstrates contact continuity, is lit and remains lit each time these circuit breakers are closed.
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.
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IE Circular No. 79-17 August 14, 1979 LISTING OF IE CIRCULARS ISSED IN LAST SIX MONTHS Circt_2r Subject Date of Issued To No.
Issue 79-03 Inadequate Guard 2/23/79 All Holders of and Training - Qualifica-applicants for Special tion and Falsified Nuclear Material Licenses Training Records in Safeguards Group I 79-04 Loose Locking Nut 3/16/79 All Holders of Reactor Oa Limitorque Valve Operating License (OL) or Operators Construction Permits (CP) 79-05 Moisture Leakage in 3/20/79 All Holders of Reactor St randed b' ire Conductors Operating License (0L) or Construction Permits (CP) 79-06 Failure to Use Syringe 4/19/79 All Holders of Medical and Battle Shields in Licensees except Teletherapy Nuclear Medicine Licensees 79-07 Unexpected Speed Increase 5/2/79 All Holders of BWR Operating of Reactor Recirculation Licenses (OLs) or Construc-MG Set Resulted in Reactor tion Permits (cps)
Power Increase 79-08 Attempted Extortion - Low 5/18/79 All Fuel Facilities and Enriched Uranium Reactors Licensed by NRC 79-09 Occurrences of Split or 6/22/79 All Materials Priority I, Punctured Regulator Fuel Cycle and Operating Diaphragas in Certain Reactor Licenses (OL)
Self Contained Breathing Apparatus 79-10 Pipefittings Manufactured 6/26/79 All Power Reactor Licensees froa Unacceptable Material with a Construction Permit and/or Operating License (OL) 79-11 Design / Construction 6/27/79 All Holders of and Applicants Interface Problem for Power Reactor Construction Permits (CP)
Enclosure Page 1 of 2 n:.
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IE Circular No. 79-17 August 14, 1979 79-12 Potential Die 2:1 Generator 6/28/79 All Power Reactor Licensee with Turbocharger Problem a Construction Permit (CP) and/or Operating License (OL) 79-12 Replaca--n*
3 Diesel 7/13/79 All Power Reactor Licensee n
Fire Purp ;
'-*ing with a Construction Permit Contactors (CP) and/or Operating Licensee (OL) 79-14 Unauthorized Procurement 7/13/79 All Medical Licensees and Distribution of Except Teletheraphy XE-133 Medical Licensees and to all Radiopharmaceutical Suppliers 79-15 Bursting of High Pressure 8/8/79 All Materials Priority I, Hose and Malfunction of Fuel Cycle and Operating Relief Valve "0" Ring in Power Reactor Licensees Certain Self-contained Breathing Apparatus 79-16 Excessive: Radiation 8/16/79 All Radiography Exposures to Members Licensees of the General Public and a Radiographer o-Enclosure N cn Page 2 of 2 D
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