ML20032C760
| ML20032C760 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf, San Onofre, Shoreham  |
| Issue date: | 11/05/1981 |
| From: | Boyer R TRANSAMERICA DELAVAL, INC. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-PT21-81-511-000 PT21-81-511, PT21-81-511-000, NUDOCS 8111110663 | |
| Download: ML20032C760 (2) | |
Text
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Director, Office of Inspection and Regulation 6
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Dear Sir:
in accordance with the requi rements of Ti tle 10, Chapter 1, Code of Federal Re-gulations, Part 21, Transamerica Delaval, Inc., hereby noti fies the Commission of a potential defect in a component of DSRV or DSR Standby Diesel Generator.
There exists a potential problem with a spherical washer subassembly which is part of the piston assembly, which could result in engine non-availability.
s Transamerica Delaval has supplied the D."' and DSRV engines with the potential defect to the following sites.
1)
Long Island Lighting Co., Shorham Nuclear Power Station S/N 74010/12 DSR8 7
2)
Hiddlesouth South Energy, Grand Gulf Nuclear Station S/N 74033/36 DSRVl6 3)
Southern California Edison, San Onofre S/N 75041/42 DSRV20
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These spherical washers were purchased from W: tern Tool and Supply, Jakland, Ca l i;forn i a.
The spherical washers were installed in the Piston Assembly by r
Transamerica Delaval.
The potential defect is improperly manufactured spherical washers. Spherical washers which have not been properly heat treated or machined incorrectly could fail pre.iaturely.
If the spherical washer fails, engine availability could be af fected.
A copy of this letter will be sent to each of the cognizant parties listed in paragraph 2.
Transamerica Delaval has a design available now which replaces the spherical washer design. The existing pistons can be modified to the new desiy1.
Information on this modi fication will be sent to each party meritioned in paragraph 2, when a copy of this letter is sent as mentioned above. Trans-l an. erica Delaval will furnish parts and technical services as requested, and in accordance wi th each individual contract.
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P O Don 2161 yp Oakiard Cahfarnea 94621 (415) 577 7400 i
Director, Of fice of Inspection and Regulation U.S. Nuclear Regulatory Connaission November 5, 1981 Transamerical Delaval received informc tion on a failure of a spherical washer piston assembly at Grand Gul f Nuclear Station on October 27, 1981.
The corrective action recommended to eliminate this potencial problem is to re-place the spherical washe, design with the new design. We cannot estimate the completion date, since it will depend on the cction taken by the engine users.
This report confi rms an ini tial telephone call to Mr. R.T. Dodds, Region 5, Walnut Creek, Cali fornia, on November 5,1981.
Our evaluation of this matter was concluded on November 4,1981.
Sincerely,
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R. E. Boyer, Manager Quality Assurance f.EB : l c cc:
Mr. R.T. Dodds U.S. Nuclear Regulatory Commission 1990 N. Cali fornia Blvd.
Walnut Creek, CA 94596 l
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