ML19220B834
| ML19220B834 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/30/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Herbein J METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 7904270443 | |
| Download: ML19220B834 (1) | |
Text
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R "FG0g UNITED STATES
,g NUCLEAR REGULATORY COMMISSION
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631 PARK AVENUE j
3, KING OF PRUSSI A, PENNSYLVANI A 19406 March 30, 1979 Docket Nos. 50-320 50-289 Metropolitan Edison Company ATTN:
Mr. J. G. Herbein Vice President - Generation P. O. Box 542 Reading, Pennsylvania 19640 Gentlemen:
Enclosed is IE Bulletin No. 79-04, which requires action by you with regard to your power reactor facility (ies) with an operating license or a construction permit.
A written response is required.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely,
/d Boyce H. Grier
~ Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/encls:
E. G. Wallace, Licensing Manager J. J. Barton, Project Manager R. C. Arnold, Vice President - Generation L. L. Lawyer, Manager - Generation Operations G. P. Miller, Manager - Generating itation - Nuclear J. L. Seelinger, Unit i Superintender,t W. E. Potts, Unit 1 Superintendent - Technical Suoport J. B. Logan, Unit 2 Superintendent G. A. Kunder, Unit 2 Superintendent - Technical Support I. R. Finfrock, Jr.
Mr. R. Conrad G. F. Trowbridge, Esquire Miss Mary V. Southard, Chairman, Citizens for a Safe Environment 83 127 7004270443
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-04 Date:
March 30,1979 Page 1 of 3 INCORRECT WEIGHTS FOR SWING CHECK VALVES MANUFACTURED BY VELAN ENGINEERING CORPORATION Description of Circumstances:
North Anna No. 1, Beaver Valley No. I and Salem No. I have reported to the NRC that they had been provided incorrect weights for the six inch swing check valves provided by Velan Engineering Corporation.
The six inch valve weight provided on the drawing was 225 pounds, whereas the actual weight has been determined to be 450 pounds.
In addition to the 6 inch valves, drawings for 3 inch valves have specified 60 pounds weight while the measured weight by the manufacturer was 85 pounds and drawings for 4 inch valves have specified 100 pounds weight while the measured weight was 135 pounds.
The manufacturer presently estimates the following maximum weights for swing check valves.
Maximum Weight (lbs)
Nominal Valve Size for High Pressure (1500 psi)
Up to 1973 After 1973 3 inches 85 100 4 inches 135 150 6 inches 450 525 8 inches 750 1200 10 inches 1200 1200 The NRC staff has indications that in some cases, incorrect valve weights derived from engineering drawings were used in piping stress analyses.
The staff is not aware of a significant difference in the actual weight and the weight provided on drawings for the 8 and 10 inch valves.
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