ML19329B739
| ML19329B739 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/03/1972 |
| From: | TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19329B735 | List: |
| References | |
| NUDOCS 8002060746 | |
| Download: ML19329B739 (2) | |
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D['S-BESSE NUCIEAR PCiER STATICN Report of Shipping Da= age to Centain=ent Vessel Equipment Hatch.
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Background
The contain=ent vessel for the Davis-Besse Station is being fabricated and field-erected by the Chicago Bridge & Iron Cc=pany and is in final stages of erection.
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The 13-foot dia=eter equipment hatch for this structure had been shipped to the job site en April 11, 1972. After shipment, a routine internal CE&I shop audit disclosed that velded attach =ents had been attached after stress reliev-ing, which required further tress relieving.
--On-May 2h,1972, this equipment hatch was shipped from the site to the Chicago plant for stress relieving in the shop facilities.
Incident -
on May 28 or 29, 1972, while the shipping ' car was on the Penn Central Railroad at Elkhart, Indiana, the shipping car was hu= ped sufficiently to damage the equipment hatch. Upen arrival at the C3&I Chicago plant, inspection revealed
. damage to the' extent that repair vould be necessa:/.
Inspection and Renair
- A complete inspection and repair procedure with results of da= age was sub=itted under date of. June e, 1972, and approved en June 9, 1972.
be danage consisted of two dented-in areas of the dished decr head. The ene
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tire head was cleaned of paint, the veld sea =s and attach =ent velds were sand-blasted and magnetic pe.rticle tested.
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8002060 g
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Te center portion of thwdoor head containing the two de".ed areas was cut
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out and replaced with a new dished center plate.
4 i The entire equipment hatch assembly was then st ess relieved, final inspected, and finished for shipment.
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The inspection, repair, and stress relieving was completed and the hatch assembly re-shipped to the job site on June lh, 1972. Installation of the hatch assembly in t* ne centainment vessel commenced on June 26, 1972, and is essentially cc=plete.
Summary The shipping damage to the containment vessel equipment hatch was inspected and
- j. repaired using detailed approved precedures in the nanufacturer's plant and the hatch meets all requirements of the codes and specifications under which it was manufactured.
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-August 3, 1972 l
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