ML20212N137
| ML20212N137 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek, 05000000, Satsop, Marble Hill |
| Issue date: | 08/25/1986 |
| From: | Driscoll H MAGNETEK, INC. |
| To: | Forney W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-86, REF-PT21-86-278-000 PT21-86-278, PT21-86-278-000, NUDOCS 8608280098 | |
| Download: ML20212N137 (4) | |
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04 7 A Onma Mywkm at Drives & Sy5tems,16555 West Ryerson Rd., New Berlin, WI 53151 414 782-0200 TWX 910-262-3115 US Nuclear Regulating Commission 799 Roosevelt Road Building 4 Glen Ellyn, IL 60137 Attention:
William L.
Forney - Section IA
'rge r - 1t l\\f n w F w A y o g This is to confirm my telephone notification to you on August 20, 1986.
This is to report potential defects as described below.
For your information Louis Allis is the successor to Beloit Power Systems for nuclear diesel generator control panel switchgear spare parts.
Problem Potentially defective operation in service of Synchronizing Speed Switches used in safety related auxiliary generating equipment (standby diesel gen-orators) at the listed power stations could prevent operation of the equipment.
(See attached list).
Date we concluded problem existed - August 19, 1986 Specific Problem Part Name.
Synchro-Start Electronic Speed Switch Manufacturer Synchro-Start Products, Inc.
Skokie, IL DA progran - commercial Model No.
ESSB Service Class Commercial - user qualified Nuclear Service Oualification Source Colt Industries Qualification Report No. - Wyle Labs 47114-1 Beloit, WI g)G25 5386 n
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i Investigations by Louis Allis OA with the manufacturer - Synchro-Start 1
Products, Skokie, IL has disclosed the following information.
The in-vestigations were made upon Louis Allis rejection of two model ESSB speed switches for speed switch relay high and erratic contact re-4 sistance.
(1)
Report by Synchro-Start that they have been experiencing a high
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rate of Potter Brumfield R10 relay defects and test failures over an extended period of time.
l (2)
Documented analysis and corrective action report by Potter & Brum-field provided by Synchro-Start during an investigative limited survey at their plant.
The analysis reports on a sample of 13 re-1 lays selected from 43 defective relays sent to P&B in January J
1986.
P&B report states that design of relay prior to August 1985 could cause phenolic dust particle contamination of relay con-tacts that could result in intermittent closures.
The report also i
shows R10 relay characteristics that can permit defective relay i
operation if proper manufacturing controls by user are not fol-lowed:
4 A.
Corrosion on relay armature hinge caused by cleaning solvents used during manufacture of the speed switch (relay is not of scaled construction).
j B.
Tension on coil wires that could lead to breakage during i
service if P&B specified maximum allowable 020" coil lug movement occurs in manufacture.
i Synchro-Start has informed Louis Allis that because of their reported i
problems with R10 relays they have discontinued their use in the ESSB l
l speed switch.
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Limited survey at Synchro-start further showed that standard performance l
tests and control does not adequately test for the potential defects.
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Corrective.Tculon Louis Allis Drives & Systems Division to investigate and issue report which will Cefine corrective action.
Report will be issued by 26 Sep-tomber 1986.
I j
Advice 1.
Switches should be checked at first available opportunity for pos-j itive contact function when the relay is energized and deonergized.
A.
If the speed switch is not installed, the contact operation may be checked by placing low resistance ohmmeter across proper terminals of speed switch.
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Page 3 Nor.nally Open Contacts Normally Closed Contacts Terminals Terminals 8-10 8-9 5-7 5-6 2-4 2-3 16-1 16-15 If relay is installed, an alternate method is to observe contact closure is by use of a voltmeter.
Observation - Should be no indication of erratic operation of contacts when energized or deenergized.
Action - Remove and replace if erratic operation is observed.
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Harlan Driscoll Military & Nuclear QA Manager HD/kg
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MFR. OF EQUIPMENT CUSTOMER QUANTITY POWER FACILITY Beloit Power Systems Colt Industries 2-Original Washington Public Power (Succeeded by Louis Fairbanks Horse Engine Div Equipment Supply System Allis Company) 701 Lawton Avenue 2-Excess WNP 3 16555 W. Ryerson Rd Beloit, WI 53511 P.O. Box 1223 New Berlin, WI 53151 Elma, WN 98541
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Beloit Power Systems Colt Industries 4-Original Public Service Co. of (Succeeded by Louis Fairbanks Horse Engine Div Equipment Indiana Allis Company) 701 Lawton Avenue Marble Hill 16555 W. Ryerson Rd Beloit, WI 53511 1000 E. Main Street New Berlin, WI 53151 Plain Field, IN 46168 Beloit Power Systems Colt Industries 4-Original Public Service E&G Co.
(Succeeded by Louis Fairbanks Morse-Engine Div Equipment Hope Creek #1 Allis Company) 701 Lawton Avenue 4-Excess P.O. Box 236 16555 W. Ryerson Rd Beloit, WI 53511 1-Seismic Hancocks Bridge, New Berlin,.WI 53151 Replacement New Jersey 08038 6-Spare Parts t
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