ML20087F428

Part 21 Rept Re Apparent Design Deficiency in Siemens Allis Model MA-205B Stored Energy Circuit Breaker.Breaker Insp & Hold Down Device Orientation Will Be Complete by 840401. Determination of Permanent Fix & Implementation by 840601

ML20087F428
Person / Time
Site:	Palisades
Issue date:	02/29/1984
From:	Johnson B, Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-84-161-000 PT21-84-161, PT21-84-161-000, NUDOCS 8403190101
Download: ML20087F428 (5)

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Consumers Power Company l

General offices: 1945 West Parnall Road Jackson, MI 49201 * (517) 788 0550 February 29, 1984 James G Keppler, Administrator Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - TITLE 10 CFR 21 REPORT -

DEFECTIVE SIEMENS ALLIS BREAKERS The attached 10 CFR 21 Report provides information on the apparent design deficiency discovered in the Siemens Allis Model #MA-205B Stored Energy Circuit Breaker. As a result of an evaluation of the deviation, it was determined that this occurrence is reportable in accordance with 10 CFR 21,

" Reporting of Defects and Noncompliances."

This correspondence confirms a telecon report made to Mr Robert DeFayette of your staff on February 24, 1984 and thus conforms with the notification criteria of 10 CFR 21.21(b)(2).

1.<Euu ww Brian D Johnson Staff Licensing Engineer CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement hPC Resident Inspector-Palisades Attachment i

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oc0284-0352a142 . MAR 5 1240 g/f 8403190101 840229 PDR ADOCK 05000255 I!I i

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Consumers Power Company Palisades Plant Docket 50-255 10 CFR 21 REPORT DEFECTIVE BREAKERS Februarf 29, 1984 3 pages ic0284-0352bl42

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10 CFR 21 REPORT Defective Breakers

1) Name and address of individual 15 forming the Commission:

Brian D Johnson 2, Consumers Power Company '

1945 W Parnall Road Jackson, MI 49?ol

2) Facility identification, activity or basic component which fails to comply or contains defects is:

Siemens Allis Model # MA-250B Stored Energy Circuit Breaker

3) The firm constructing facility or supplying the basic component which failed to comply or contained defect is:

Siemens Allis, Inc.

5700 West Hemlock St.

Milwaukee, WI 53223 (404) 457-2810

4) a. Nature of defect or failure to comply is:

The orientation cf the breakcr indication wire nold down device is not specified on the breaker design drawings, thereby allowing the indication wire to be orientated such that it. can inhibit breaker operation. If improperly oriented, the indication wire can interfere with the movement of the prop latch, resulting in at least two modes of breaker failure. In the first mode, the prop latch cannot function properly, which prevents the charging springs from becoming fully charged. As a result, when an attempt is made to close the breaker, there is insufficient stored energy to close the breaker and the breaker trips open. In the second mode, the indication wire can inhibit the prop latch from indicating that the charging springs are fully charged. Therefore, the charging motor continues to operate continuously, cycling the charging springs and preventing breaker operation. In both modes, the net result is the breaker cannot be closed locally or remotely.

The defect was initially discovered during evaluation and corrective action for a recent loss of communications event (LER 84-001). Two additional breakers have subsequently been inspected with the orientation problem noted in one of'the breakers. Consequently, two of the three breakers inspected have had the orientation problem.:

IC0284-0059B-L101

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b. The safety hazard which was or could be created is:

Breakers of this type are used to supply both station power and startup power to the class 1E 2400 volt buses 1C and ID from which

, all emergency safeguards loads are supplied. Additionally, breakers of this type supply station power and startup power to the 4160 volt buses 1A and IB, which provide power to the primary coolant pumps.

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5) The date when information of defect or failure to comply was obtained is:

February 21, 1984

6) In the cace of a basic component which contains a defect or fails to cocply, the number and location of all such components in use at, supplicd for or being supplied for one or more facilities or activities subject to Part 21 is:

There are 11 breakers of this type in use at the Palisades Nuclear Plant. Their location is as follows:

Breaker Number Supply Function Station Power to Bus 252-101 1A '

252-201 IB 152-105 1C 152-203' ID -

152-302 IF Startup Power to Bus 252-102 1A 252-202 IB-152-106 1C 152-202 1D 152-303 LE 152-310 Eus 1E supply to Transformers 90 and 91

7) a. The corrective action planned or taken is:

1. Inspect all breakers of t'.iis type to assure correct orientation of indication wire hold dows device.

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2. Contact the breaker vendor to determine appropriate permanen:.

repair.

3. Upon determination of appropriate permenent repair, revise applicable maintenance procedures and periodic inspection requirements to reflect the repairs.

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'b. The name of the individual /organi=ation responsible is:

Palisades Nuclear Plant ia ,

c. The length of time required to complete action was or is estimated to be:

j 1. The breaker inspection and hold down device orientation will be completed by April 1, 1984.

2. Determination of a permanent fix and implementation is expected by t

June 1, 1984.

8) Any advice related to the defect or failure to comply about the facility,

activity, or basic component that has been, is being or will be given to purchasers or licensees

None

!e Prepared By DWRogers (signed) Date 2-22 ,84 1

Approved Yes No thC /dAi G_ 1f 24 8y ,

' Nuclear Lgphnsing Administrator Date 1

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