ML13308B389
| ML13308B389 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/14/1976 |
| From: | Ottoson H Southern California Edison Co |
| To: | Engelken R NRC Office of Inspection & Enforcement (IE Region V) |
| References | |
| NUDOCS 8103180673 | |
| Download: ML13308B389 (3) | |
Text
Southern California Edison Company May 4. 1976 United States Nuclear Reqlatory Commission Region V Office of Inspection and Enforcement Walnut Creek Plaza, Suite #02 19390 orth California Boulevard Walnut Creek California 94596 Attention:
Mr, R. H. Engehken, Director Docket No. 50-206 son Onofre Unit 1
Dear Sir:
During spent fuel shipping operations currently in progress, a nondestructive magnetic particle inspection of the spent fuel shipping cask lifting devices was being conducted as part of a continuing lifting device inspection program.
On May 3, 1976, in the process of this inspection program, a defect was discovered in welds on the rectangular coupling device which is positioned between the extension shaft and the sister hooI: adapter as shown in Figure I.
Figure 11 details the rectangular coupling device with pertinent dimensions.
As shown in Figure II, the defective welds secure block A to sides 1 and 2 to foir the rectangular coupling device, Based on the above, the existing rectangular coupling device has been determined unsuitable for further service in its present condition.
Appropriate corrective measures will be taken before spent fuel shipments are resumed.
A detailed report on this matter, together with the licensee event report form will be forwarded within two weeks, Sincerely, H. L. Ottoson Superintendent Csee
(.3
CRANE HO SISTER HOOl,)K ADA I
R PI A
RECTANGULAR COUPLING DEVICE EXTENSION SHAFT COUPLING HOOK FOR SPENT FUEL SHIPPING CASK FIGURE I SPENT FUEL SHIPPING CASK LIFTING DEVICE
~
HOLE FOR PIN A 4 5/8" 3"
37 46" 7 1/2" D FEC IELD WT 5 8"---
DEFECT 7IF i
I D
SIDE tSID 2w HOLE FOR B
BLOC K A EXTENSION SHAFT FIGURE 11 DETAIL OF THE RECTANGULAR COUPLI0 DEVICE