ML20073E810

Part 21 Deficiency Rept Re Electroswitch Series 20k Switches Supplied by Electroswitch Corp for Use in NSSS Equipment. Initially Reported on 820223.All Switches Will Be Replaced by Redesigned Version

ML20073E810
Person / Time
Site:	Clinton
Issue date:	04/07/1983
From:	Hall D ILLINOIS POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-83 1606-L, U-10035, NUDOCS 8304150359
Download: ML20073E810 (7)

Text

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t 1606-L ILLINDIS POWER OOMPANY U-10035 CLINTON POWER STATION. P.O. BOX 678, CLINTON ILLINOIS 61727 April 7, 1983 Docket No. 50-461 Mr. James G. Keppler Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

SUBJECT:

10CFR PART 21 DEFECT ELECTROSWITCH SERIES 20K CONTROL SWITCHES

Dear Mr. Keppler:

On February 23, 1982, Mr. F. C. Downey of General Electric notified Mr. J. D. Geier, Illinois Power Company, of a potential reportable defect per 10CFR Part 21 regarding Electroswitch Series 20K switches supplied by the Electroswitch Corporation to General Electric for use in NSSS equipment at Clinton Power Station. Based upon an evaluation, Illinois Power is notifying the Commission of a 10CFR Part 21 defect. This report provides information as required by 10CFR Part 21.21 (3).

(i) D. P. Hall, Vice President of Illinois Power Company, by means of this report, hereby informs the Commission of a 10CFR Part 21 defect.

(ii) The basic components involved are electrical switches, 3 position with spring return to mid position, Electroswitch Series 20K, manufactured by the Electroswitch Corporation during the period of early 1976 through May, 1981.

(iii) The electrical switches were manufactured by the Electroswitch Corporation, Weymouth, Massachu-setts, 02188. (telephone (617)-335-5200, Mr. W. Mello)

(iv) In the event the switch handle is rotated to either extreme position and released so as to cause an accelerated snapping action on its return to normal (center) position, the " normal after" contacts (slip contacts) can index an additional 8304150359 030407 PDR ADOCK 05000461 8 ""

ggjpAPR 11 1983

' l i

'Mr. Jcmas C. Keppler Pago 2 April 7, 1983 l position. This overtravel condition could cause the " normal after" contacts to misoperate, thereby giving false indication as to actual switch position. Failure of the switch to perform as intended could result in safety functions not being performed automatically. Although there may be an indication to the operator which would alert him to this problem, the situation could result in a condition or circumstance that could contribute to the exceeding of a safety limit after the plant is operational.

(v) Illinois Power was notified by General Electric on February 26, 1982 of a potential defect in the Electroswitch Series 20K switches.

(vi) Electroswitch Series 20K switches are used in class 1E systems and are used both for indicating lights and for automatic start circuits.

Attachment A is a tabulation (total 62) of the non-NSSS safety-related Electroswitch Series 20K switches used at Clinton Power Station, i Attachment B is a tabulation (total 18) of the NSSS safety-related Electroswitch Series 20K switches used at Clinton Power Station.

(vii) All Electroswitch Series 20K switches used in safety-related applications will be replaced by a redesigned version of the switch manufactured by Electroswitch to correct the problem. The modified switch has two shafts and a detent housing for the " normal after" contacts. This redesign significantly reduces the spring return snapping action that resulted in the indexing of the slip contacts. The detent prevents the overtravel condition. The number of , lip contact stages has also been reduced on the r2 designed switches. In some instances, separate auxiliary relays will be added to obtain the required number of contacts.

The replacement Series 20K switches will be provided with the original IEEE qualification documents. However, Electroswitch is in the process of a new qualification program on the switches, which should be complete in the first quarter of 1984. Illinois Power will obtain the new qualification documents upon completion of the

• tests.

.a 2-L --_4 k =w - - + -

'Mr. James C. Keppler Page 3 April 7, 1983 ,

Revision of design documents affected by the i replacement will be performed by General Electric for switches in the NSSS scope plus those documents associated with the Power Generation Control Panels. Sargent & Lundy (CPS Architect -

Engineer) will be responsible for modifying non-NSSS documents.

Procurement of the replacement switches will be the responsibility of Baldwin Associates (IP l Contractor) using procurement documentation

furnished by Sargent & Lundy.

Physical replacement of the switches will be performed by Baldvin Associates using documenta-tion furnished by General Electric and Sargent &

Lundy. The replacement of the switches is expect-ed to be complete by December 31, 1983.

(viii) Not applicable i

Our evaluation of this reportable defect is available for your review at our offices. I trust that this letter provides 4

sufficient information for your review ar.d analysis of the

problem.

S cerely yours, 4

. . Hall Vice President attachments 4

cc: H. H. Livermore, U. S. NRC Resident Inspector Illinois Department of Nuclear Safety Manager - Quality Assurance Director of Inspection and Enforcement - 3 copies

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Attachment A Non-NSSS Safety Related Electroswitch Series 20K Switches Switch ID Panel (1HS-) Location Service AP208A P877-14C 4160V SWGR 1A1 BRKR 252-201A1 AP209A P877-14C 4160V SWGR 1A1 BRKR 252-221A1 AP210A P877-15C 4160V SWGR 1B1 BRKR 252-201B1  ;

AP211A P877-15C 4160V SWGR 1B1 BRKR 252-221B1 AP952 P877-14C 4160V BUS,1Al TO 480V BRKR 252-ATIAAl l AP953 P877-15C 4160V BUS 1B1 TO 480V BRKR 252-ATlBBl ,

DG216A P877-14C 4160V SWGR 1A1 BRKR 252-DGlA DG217A P877-15C 4160V SWGR 1B1 BRKR 252-DGlB D0002 P877-14C DG FUEL OIL TRANS PUMP 1A ,

D0005 P877-15C DG FUEL OIL TRANS PUMP 1B D0009 P601-16C DG FUEL OIL TRANS PUMP 1C FC106 P800-62C FC PUMP 1FC02PA FC107 P800-62C FC PUMP 1FC02PB SX007 P601-20C SHUTDOWN SERVICE WATER PMP 1A SX008 P601-17C SHUTDOWN SERVICE WATER PMP 1B SX009 P601-16C SHUTDOWN SERVICE WATER PHP 1C VD001 P801-66B DG ROOM 1A SPLY FAN 1A VD002 P801-67B DG ROOM 1B SPLY FAN 1B VD003 P800-64B DG ROOM IC SPLY FAN 1C ,

VD010 P801-66B DG EXH FAN 2A VD011 P801-67B DG EXH FAN 2B VD012 P800-64B DG EXH FAN 2C VG001 P801-66C SGTS TRAIN A EXH FAN 2A

Attachment A Non-NSSS Safety Related Electroswitch Series 20K Switches Switch ID Panel (lHS-) Location Service VG002 P801-66C SGTS TRAIN A COOLING FAN 3A VG101 P801-67C SGTS TRAIN B EXH FAN 2B VG102 P801-67C SGTS TRAIN B COOLING FAN 3B VH001 P801-66B SHUTDOWN SERVICE WTR VENT FAN 1A VH002 P801-67B SHUTDOWN SERVICE WTR VENT FAN 1B VH003 P800-64B SHUTDOWN SERVICE WTR VENT FAN 1C VP001 P801-66C DIV 1 DRYWELL COOLER FAN 1A VP002 P801-66G DIV 1 DRYWELL COOLER FAN 1C VP003 P801-67C DIV 1 DRYWELL COOLER FAN 1B VP004 P801-67C DIV 1 DRYWELL COOLER FAN 1D VP007 P801-66C DRYWELL CHILLED WATER PUMP 03PA VP008 P801-67C DRYWELL CHILLED WATER PUMP 03PB VX001 P801-66B SWGR SPLY FAN 3A VX002 P801-67B SWGR SPLY FAN 3B VX003 P800-64B SWGR SPLY FAN 3C VX040 P801-66B BATTERY RM EXH FAN IVX05CA VX041 P801-67B BATTERY RM EXH FAN IVX05CB VX042 P800-64B BATTERY RM EXH FAN IVX05CC VX050 P801-66B BATTERY RM EXH FAN IVX11CA VX051 P801-67B BATTERY RM EXH FAN IVX11CB VX070 P801-66B BATTERY RM EXH FAN IVX12CA l I

VX071 P801-67B BATTERY RM EXH FAN IVX12CB VY001 P801-66B ECCS EQUIP AREA CLG LPCS PUMP RM FAN 1C l

l f

Attachment A i Non-NSSS Safety Related Electroswitch Series 20K Switches Switch ID Panel (1HS-) Location Service VY002 P801-66B ECCS EQUIP AREA CLG RHR PUMP RM FAN 2C VY003 P801-66B ECCS EQUIP AREA CLG RHR HT EXCH RM A VY004 P801-66B ECCS EQUIP AREA CLG RCIC PUMP ROOM HC VY005 P801-67B ECCS EQUIP AREA CLG RHR HT EXCH ROOM B VY006 P801-67B ECCS EQUIP AREA CLG RHR HT EXCH ROOM B VY007 P801-67B ECCS EQUIP AREA CLG RHR PUMP ROOM C VY008 P800-64B ECCS EQUIP AREA CLG HPCS PUMP ROOM

/Y009 P800-64B ECCS EQUIP AREA CLG HPCS PUMP ROOM (OHS-)

VC001 P801-66C CONTROL ROOM TRAIN A SPLY FAN 3CA VC004B P801-66C TRAIN A MAKE-UP AIR FAN 05CA VC071 P801-66C EQUIP RM SUPPLY FAN 18CA VC101 P801-67C CONTROL RM TRAIN B FAN 3CB VC104B P801-67C TRAIN B MAKE-UP AIR FAN 05CB VC171 P801-67C EQUIP RM SUPPLY FAN 18CB VQ013 P800-64C DRYWELL PURGE SYS FAN OVQO3CA VQOl6 P800-64C DRYWELL PURGE SYS FAN OVQ03CB

- - . ~_

i Attachment B NSSS Safety Related Electroswitch Series 20K Switches Switch Panel ID Location Service 1C11BS003A P601-22C CRD Pump 1A*

1C11BS003B P601-22C CRD Pump 1B*

1C41AS001A P601-19B SLC Pump 1A & Squib Valve F004A 1C41AS001B P601-18B SLC Pump 1B & Squib Valve F004B 1E12AS003A P601-20C RHR Pump C002A 1E12AS003B P601-17C RHR Pump C002B 1E12AS003C P601-17C RHR Pump C002C 1E12AS057 P601-17C RHR Water Leg Pump 1E21AS006 P601-21C LPCS Pump C001 1E21AS007 P601-21C LPCS Water Leg Pump C002 1E22AS003 P601-16C HPCS Standby Water Leg Pump C003 1E22AS015 P601-16C HPCS Pump 1E22BS007 P601-16C Breaker No. 3 Control 1E22BS009 P601-16C Breaker No. 4 Control 1E22BS010 P601-16C Breaker No. 1 Control 1E22BS015 P601-16C 4160V Bus 1C1 Reserve Feed Breaker 1E51AS015 P601-21C Gland Seal Air Compressor 1E51AS033 P601-21C RCIC Water Leg Pump

• Non 1E switches, but require replacement due to service