ML20153G102

Part 21 Rept Re Potential Defect in K-1 Relays of Dsr or Dsrv Standby Diesel Generators Mfg by Gould/Ite.Relays Have Incorrect Voltage Range.Dc Voltage Source or Voltage Regulator Circuitry Requires Mod

ML20153G102
Person / Time
Site:	Perry, Harris, Comanche Peak, 05000000, Shoreham, Hartsville, Phipps Bend
Issue date:	02/19/1986
From:	Guntrum B TRANSAMERICA DELAVAL, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-86, REF-PT21-86-080-000 134, PT21-86-080-000, PT21-86-80, NUDOCS 8602280017
Download: ML20153G102 (3)

Text

-

Tmumma * "**=e"c oe**""c-Enterprise Engine Division wy 1 1 iera"=e war a esta ^ve"ve '

h'[* Delmal e".O. Box 2161 P l)' 6 e f "' g oaktand. Cahfornia 94621 i (415) 577-7400 _

/ goo T " h ll- % a>

3 y ves r u

\ Report #134 "

February 19, 1986 '

Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Sir:

In accordance with the requirements of Title 10, Chapter 10, Code of Federal Regulations, Part 21, Transamerica Delaval hereby notifies the Commission of a potential defect in a component of a DSR or DSRV Standby Diesel Generator. There could exist a potential problem with a K-1 Relay in the generator voltage regulator.

Transamerica Delaval has supplied DSR and DSRV series engines with this potential problem to the following nuclear sites:

Utility Site Serial # Model Long Island Lighting Shoreham 74010-12 DSR-48 Carolina Power Shearon Harris 74046-49 DSRV-16-4 Cleveland Electric Perry 75051-54 DSRV-16-4 Texas Utilities Commanche Peak 76001-04 DSRV-16-4 TVA Hartsville/Phipps 77024-35 DSRV-16-4 Bend A recently completed analysis indicates that the K-1 relay was supplied to these sites with an incorrect voltage range. The relays have been environmentally qualified to IEEE-323 with a 100-140 VDC operating range whereas customer specifications require a 90-140 VDC range.

The K-1 relay is manufactured by Gould/ITE (now Telemecanique) and is mounted in the Generator Control Panel. This panel is part of the Standby Diesel Generator system supplied by Transamerica Delaval.

e602200017 e60219 2 /

ADOCK 050 gDR s O

. Transamenoa Delaval T

Director, Office of Inspection and Enforcement February 19, 1986 Page 2 This relay is interconnected in the field flash circuit and must operate properly for field flash operation to begin.

DC voltage is provided for engine-generator startup from customer supplied on-site battery sources. If the voltage supplied is between 90-100 VDC, the K-1 relay may not operate properly,adversly affecting generator output.

Immediate correction of this problem is necessary. This can be effected in either of two ways; the Utility can modify its DC voltage source and specification to assure a supply range of 100-140 VDC or the voltage regulator circuitry can be modified to reliably accept a DC voltage supply in the 90-140 VDC range. Since action is required by others, we cannot estimate when the corrective action will be completed.

A copy of this letter will be sent to all of the sites referenced in paragraph 2 of this letter as indicated by the carbon copy list.

Our evaluation of this matter was concluded on February 14, 1986.

Very truly yours, i

_, w-B.C.,Guntrum Manage r, Quality Assurance BCG:ddm cc: LILCO CP&L CEI TUSI TVA Stride

_. Transamenoa Delaval T

cc: Long Island Lighting Co.

Shoreham Nuclear Power Station North Country Road Wading River, New York 11791 Attn: Manager, Nuclear Operations Support Department Carolina Power & Light Co.

Shearon Harris Nuclear Plants P.O. No. 101 New Hill, North Carolina 27562 Attn: Mr. R.A. Watson, Vice President Mr. L.I. Loflin, Harris Plant Eng.

Mr. N.J. Chiangi, Manager, Q.A.

Cleveland Electric Illuminating Co.

c/o Perry Nuclear Power Plant P.O. Box 97 Perry, Ohio 44081 Attn: Mr. C.M. Shuster, Manager Nuclear Quality Assurance Texas Utilities Services Inc.

P.O. Box 2300 Glen Rose, Texas 76043 Attn: Mr. J.T. Merritt, Jr.

Engineering & Construction Mgr.

TVA Hartsville W10 D224-400 Commerce Avenue Knoxville, Tennessee 37902 Attn: Mr. C.A. Chandley Chief, Mech. Eng. Branch