ML20113D420

Part 21 Rept Re Certain Lots of Commercial Grade Potentiometers in Transmeters Have Been Supplied W/Lubrication in Noncompliance W/Engineering Spec Requirements

ML20113D420
Person / Time
Site:	Hatch
Issue date:	05/15/1996
From:	ITT BARTON
To:	NRC
References
REF-PT21-96 NUDOCS 9607030156
Download: ML20113D420 (3)

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ITT BARTON INUESTR ADVESORY (May 15,1996)

MODEL 765/765A TRANSMITTER ZERO & SPAN POTENTIOMETER CONCERNS ITT Barton supplies Model 765/765A Differential Pressure Electronic Transmitters to the commercial nt: clear power industry with harsh environment (LOCA)IEEE-323/344 qualifications. ITT Barton has just recently confirmed that certain lots of the commercial grade potentiometers used in these transmitters have been supplied with lubrication in noncompliance with the engineering / purchasing specification requirements.

This Industry Advisorv is acolicable only to Model 765 and 766A Electronic Transmitten qualified under ITT Barton Engineering Report R3-765-2, where the accident ambient conditions include pressure exposures in excessive of 10 psig and significant moisture is present. For those installations where the accident environment is relatively benign (outside containment applications) the findings of t

this Advisory may not apply. Because ITT Barton sales records indicate that many Model 765/765 A Transmitters have been purchased for outside containment installations, and it may be possible that some of the installations need not remain filnctional after the start of the accident, we have left the final determination for 10CFR21 applicability to the notified purchasers of the instruments of concern, l consistent with Section 21.21 (b) of 10CFR21. A courtesy copy of this Advisory and a list of the notified customers have been supplied to the NRC consistent with the Defect and Noncompliance Reporting intent of 10CFR21.

Upon request, ITT Barton will supply a set of new potentiometers (zero and span) along with a potentiometer replacement procedure to any customer who determines that replacement of these parts is pmdent in their Model 765/765A Transmitters. All new Model 765/765 A Transmitters shipped from the ITT Barton factory after the date of this Adsisory utilize parts which satisfy the engineering specifications.

Qualification testing has shown that the same lubricated potentiometers are not a concern for LOCA harsh environment installations where the ambient atmosphere does not enter the transmitter electronics case. In the Model 765/765A Transmitter, the electronics case is a deep drawn thin wall stainless steel canister whose back is subject to deflection under elevated ambient pressure conditions

(>10 psig) allowing the ambient atmosphere to enter the transmitter electronics case at the torque tube penetration seal. The moisture and chemical environment of the containment LOCA conditions causes a breakdown in the potentiometer lubrication resulting in corrosion of the potentiometer Contacts.

Questions regarding this issue should be addressed to J. Anderson, Director ofITT Barton Quality Assurance at (818) 961-2547.

MpO 9607030154 960515 PDR ADOr' 05000321 PDR S

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l Bechtel overseas Corporation P.O. Box 34178 Phoenix, AZ 85067-4178 ATTN: Q.A. Manager Bell Power Coporation 1340 Lexington Ave.

Rochester, NY 14606 ATTN: Q.A. Manager American Air Filter 20th Floor - Q.A. ,

1 Riverside Plaza Columbus, OH 43215 ,

ATTN: Mr. J. B. Brittan j

Illinois Power P.O. Box 678 l Clinton, IL 61727 4 l

ATTN: M.R. Hiter 1

Consumer Power 1945 W. Parnall Jackson, MI 49201 ATTN: J.E. Harding Entergy Operations, Inc.

Route 3, Box 137G Russellville, AR 72801 ATTN: Charles R. Gaines Supr., Industry Events Analysis Nebraska Public Power P.O. Box 98 Brownville, NE 68321 ATTN: Guy Horn 1 Prematecnica, S.A.

C/Ulises, 18 Madrid - 28043 Spain ATTN: Q.A. Manager

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1 Tennessee Valley Authority 1101 Market Street, BR 4J ,

Chattanooga, TN 37402-2801 ATTN: R.R. Baron j

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Westinghouse Electric Corporation i Nuclear Services Division l P.O. Box 855 I Pittsburgh, PA 15230-0855 I ATTN: Q.A. Manager )

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United Engineers & Constructors-P.O. Box 221 Hancocks Bridge, NY 09038 s ATTN: Q.A. Manager  !

Yankee Atomic Electric Company f 580 Main St. l Bolton, MA 01740-1396 j i

ATTN: Sandra Nichols l

Georgia Power Co.

Plant E.I. Hatch P.O. Box 439 Baxley, GA 31513 ATTN- Q.A. Manager ITT Barton Industrial Sales 349 W. 195th Street l Glenwood, IL 60425 ATTN: Q.A. Manager