A recent Department of Energy decision will add further corrosion testing to its vitrification plant planning at the Hanford site, adding time and money while delaying a cost and schedule baseline for the overall project.On Tuesday the DOE agreed to study issues related to certain effects of erosion and corrosion within the plant's design, which had been raised in a report by a Hanford scientist. The Tri-City Herald reported the additional testing, along with testing to ensure waste is adequately mixed, will take more than a year and will cost tens of millions of dollars. Absent technical details from that research, DOE said it will not finish a cost report for the plant's completion.Contractor Bechtel National was to provide revised cost and schedule information in August, but it will now only develop cost and schedule information for the plant's low level waste facility and plant support facilities.The project covers 65 acres at the Washington site, according to DOE, and is being developed to stabilize 56 million gallons of Cold-War era nuclear and chemical liquid waste.