ML19324C113

Part 21 Rept Re Defects in Instrument Racks for Use in Hatch,Inc Supplied Emergency Diesel Generator Starting Air & Lube Oil Sys.Verification of All Tube Fittings in Instrument Rack Completed & All Discrepant Fittings Corrected

ML19324C113
Person / Time
Site:	Cooper
Issue date:	11/02/1989
From:	Horn G NEBRASKA PUBLIC POWER DISTRICT
To:	Murley T Office of Nuclear Reactor Regulation
References
REF-PT21-89-189-000 CNSS893230, PT21-89-189-000, NUDOCS 8911150006
Download: ML19324C113 (3)

Text

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Nebraska Public Power District

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CNSS893230 l

. November 2, 1989 l I

l Mr. Thomas E. Murley, Director  !

1 Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission .

Washington, DC 20555

Subject:

Report of a Defect in Accordance with 10CFR21 i I

Dear Mr. Murley:

i Enclosed please find a report submitted in accordance with 10CFR21.21(b').

This report details defects in instrument racks supplied to the Nebraska

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Public Power District's Cooper Nuclear Station for use in the emergency diesel generator starting air and lube oil systems.

Should you have any questions or concerns regarding the enclosed report, 1 please contact me.

Sine rely,

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9 da-Division Manager.of Nuclear Operations-Cooper. Nuclear Station i

CRHiju Enclosure L

! cc: Region IV Administrator .

U. S. Nuclear Regulatory Commission /

l' Arlington, TX f NRC Document Control Desk I' Washington, DC l.

Hatch,.Inc.

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8911150006 891102 7 ADOCK 05000298 i PDR S PDC 'I

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Pokverful Pride =n, in Nebraska . . ..

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n . ' Attachment (CNSS893230)' ,

November 2, 1989 .

Page 1 i

1,0CFR21 Report s t>

Defects in Hatch, Inc. Instrument Racks Six instrument racks, supplied by Hatch, inc., for use in the Cooper Nuclear

[' Station emergency diesel generator starting air and lube oil systems have been identified as~containing defects. The identified defects could have created a ,

L substantial safety hazard, if the components had been installed and used in

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L their as received condition. The following information is provided pursuant.  ;

to the requirements of 10CFR21.21(b)(3).

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1. 10CFR21. 21 (b) (3) (1)- Name and address of the individual or individuals informing the Commission:

Guy R. Horn Division Manager Nuclear Operations

-Nebraska Public Power District Cooper Nuclear Station P. O. Box 98

• Brownville, NE 68321 f

2.- 10CFR21.21 (b) (3)(ii) Identification of the facility, the activity,'or the basic component supplied for such facility or such activity with.tn the United States which fails to comply or contains a defect.

Basic Component Containing Defect - Diesel Generator -#

Instrument Racks (6)

Facility Supplied to - Cooper Nuclear Station

3. 10CFR21.21(b)(3)(111) Identification of the firm constructing the f

-facility or supplying the basic component which fails to comply or contain a defect.

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Hatch, Incorporated 1206 Myrtic' Avenue .

El Paso, TX 79901-1699

4. 10CFR21.21(b)(3)(iv) Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply.

The six instrument racks supplied by Hatch, Inc. contained numerous cases of discrepancies in the tube fittings. The discrepancies noted were 1) loose and inadequately seated ferrules, 2) missing ferrules, 3) tubing not sufficiently inserted into ferrules, and 4) cross-threaded connections.

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(. .. iAttachment (CNSS893230)'

p November 2, 1989 L Page 2 i The inadequate tube fittings in the ste.rtitig air racks could have i allowed enough leakage, such that the air pressure would not have

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been sufficient to start the diesels. Theer. components, if they have been installed and used ao received, could have caused both L emergency diesel generators to be inoperable. This potential for the loss of the safety function of both emergency diesel generators  ;

l 1s considered to be a substantial safety hazard.

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f. 5. 10CFR21.21(b)(3)(v) The date on which the information of such defect or s failure to comply was obtained.

E November 1, 1989 T~

6. 10CFR21.21(b) (3) (vi) In the case of a basic component which contains a  ;

defec. or fails to comply, the number and location of all such components in~use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part.

Six (6) instrument racks installed in the Diesel Generator Rooms at-Cooper Nuclear. Station (CNS). No other Hatch, Inc. racks are in use  !

or ordered for use at CNS.

7. I0' CFR21.21(b)(3)(v11) The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the actions; and the length of time that has been or will.be taken'to 4 complete the action.

i corrective Action - A one hundred percent (100%) verification of all tube fittings in the Hatch, Inc. instrument racks has been completed. ,

All' discrepant fittings have been corrected. A review was completed to confirm that no other similar instrument racks are in use or on order at Cooper Nuclear Station. ]

Responsible Organization - Nebraska Public Power District l

Length of Time to Complete - The 100% verification of all tube I fittings and repair of discrepant fittings consumed approximately 30  ;

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man-hours per instrument rack. The review to ensure no other similar racks are in use or on order at CNS took approximately 2 l man-hours. ]

8. 10CFR21.21(6)(3)(viii) 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.

Not applicable. The supplier has been informed through previous correspondence and will be further advised of the District's evaluation by copy of this notification. .

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