ML20153G102
| 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
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February 19, 1986 Report #134 "
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.
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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