Checking to see if there is any experience out there for manually welding the closure rings on a HOLTEC MPC. Both our primary and backup AWS weld heads have failed and we are all stop until repairs can be made. The closure rings have been installed, fit up, and tacked and the cross seam welds have been made. The inner and outer circumferential welds remain. These can be welded using the AWS for 15 to 20 mrem. Initial estimates for manual welding are 200 to 400 mrem.
Note that I am not seriously considering allow this to proceed due to dose concerns. Just doing due diligence to see if there is any experience in the industry for manually welding the closure rings and what dose reduction techniques were deployed. Joel Armstrong ALARA Engineer Dry Cask Storage Project Browns Ferry Nuclear Plant (256) 729-4998 Office (256) 497-1405 Cell
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