ML20149M060
| ML20149M060 | |
| Person / Time | |
|---|---|
| Site: | 07104909 |
| Issue date: | 02/18/1988 |
| From: | WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20149L611 | List: |
| References | |
| NUDOCS 8802250282 | |
| Download: ML20149M060 (1) | |
Text
m Step #5: Remove the foam to about a 2" depth from both exposed surfaces.
Step #6: Grind all cut stainless steel edges smooth and straight, removing the heat affected zone of plasma cut edges.
Step #7: Remove the remaining sections of wooden side rail f rom both the end assembly and the side assembly.
Step #8: Roll form 14 GA Type 304 stainless-steel strips which, when welded into the gaps in the inner liners, will make the inside length of each package 82-5/8" i 1/8".
See Figure 3.
Step #9: Roll form 14 GA Type 304 stainless steel strips which when welded into the gaps in the outer shells, will make the outside shell length 91" i 1/8".
See Figure 4.
Step #10: Roll 2" wide, 14 GA Type 304 stainless steel strips to be used as backing strips when welding in the inner and outer filler strips from Step #8 and #9.
Tack weld backing strips to inner liner and outer shell on each side assembly as shown on Figures 3 and 4.
Step #11: Install new wooden side rail, cut to the correct length to correspond with an outer shell length of 81" i 1/8".
Use new dowel rods and reglue the joints.
This rejoins the end and side assemblies leaving a void in the foam insulation of approximately 5" and leaving approximately 1" gaps in the inner liner and outer shell where weld backing strips are in place for the installation of filler strips at these gaps.
Step #12: Weld filler strips f rom Step #8 and #9 as shown in Figures 3 and 4; use GTAW weld process, achieve 100% penetration, but limit weld reinforcement to 1/32".
Step #13: Visually inspect welds in inner liners and outer shells for cracks or porosity; repair as needed.
Step #14: Form new side mating surface plates (Items 17 & 18) of 10 GA Type 304 stainless steel and cut the correct shape and length to match the 91" i 1/8" outer shells.
Step #15: Install the new plates f rom Step #14 and reweld using GMAW weld process; achieve 100% penetration at the mitered joints with the end mating surf ace plates and 3/32" fillets at the inner liners and outer shells.
Step #16: Grind miter welds, flush and inspect all new welds for cracks and porosity; repair as needed.
Step #17: Cut 4"
square hole in outer shell on either side at 45* from the centerline, and centered over the 5"
void in the foam insulation resulting f rom Step #11.
Drill four (4) 1/4" diameter vent holes at four (4) circumferential locations in each half-section of the outer shell.
The four locations being 6 1/2" f rom the end of the outer shell.
The four holes at each of these circumferential locations are as follows:
one at each side 4" f rom the mating surf ace, one at each side at 45*
and one near the centerline.
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