ML19261D400
| ML19261D400 | |
| Person / Time | |
|---|---|
| Issue date: | 04/03/1979 |
| From: | Potapovs U NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19261D382 | List: |
| References | |
| REF-QA-99900053 99900053-79-1, NUDOCS 7906190067 | |
| Download: ML19261D400 (1) | |
Text
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Anchor Darling Valve Company Docket No. 99900053/79-01 NOTICE OF DEVIATION Based on the results of an NRC inspection conducted on February 21-23, 1979, it appeared that certain of your activities were not conducted in full compliance with NRC requirements as indicated below:
A.
Criterion V of Appendix B to 10 CFR 50 states in part, "... Proce-dures or drawings shall include appropriate quantative or qualitative acceptance criteria for determining that important activities have been satisfactorily accomplished."
The ASME Code Figure NC-3673.2(b), 3(F) of Section III establishes that the minimum size of a socket weld shall be 1.09 x tn (tn= nominal pipe wall thickness) or for 3" schedule 160 pipe: 1.09 x 0.437" =
0.467" minimum weld size.
Contrary to the above, the minimum size socket weld specified in the ASME Code is not being adhered to.
For example, ADVC-W approved drawings numbers, D-9486, Revision D; C-1596-8 and C1596-9; specifies that 3" schedule 160 pipe, which has a wall thickness 0.437", is to i
be joined to a 3" valve body (Drawing No. F-5000) using a socket joint with a 3/8" (0.375") minimum fillet weld size.
B.
Criterion V of Appendix B to 10 CFR 50 and paragraph NCA-4134.5 of Section III to the ASME' Code states in part, " Activities affecting quality shall be prescribed by... drawings of type appropriate to the circumstances and shall be accomplished in accordance with these... drawings...."
ADVC-W Drawing D-9486, Revision D, for a 30" x 24" x 30" Class II, 700#, Valve Body, specifies a 3/8" (0.375") fillet weld for joining a schedule 160 pipe, to the bodies 3" by-pass valves.
Contrary to the above, it was determined that in some areas of the fillet welds inspected, the size of the fillet weld was approximately 5/16 inch (0.3125") which is less than the minimum size of the fillet welds specified by ADVC-W drawing D-9486 for joining the 3 inch by-pass piping on valve serial number NN26908; Shop Order E6210-2-1.
2308 179 79061900(;7
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