
Botching welds on 12 missile tubes for the Columbia-class submarine earlier this year proved a costly mistake for BWX Technologies [BWXT], which on Wednesday said the problems with its welding program in Indiana were more complicated than first thought.On a conference call with investors, BWX Technologies said its Nuclear Operations Group took a $40 million revenue hit in the third quarter because of the missile tube rework the company embarked on after discovering, and self reporting, balky welds on 12…