Radiation News Roundup for May 28, 2013 The Radiation Oncology Institute (ROI) is seeking proposals to examine the comparative value of radiation therapy and will provide support for the research project in the amount of $200,000 over two years. newswise.com Seaweed caused the shutdown of multiple nuclear reactors in the United Kingdom. enenews.com Iran's presidential candidates clash over their approach to Iran’s nuclear program. reuters.com Kentucky’s Paducah Gaseous Diffusion Plant will begin shutting down at the end of this week. nuclearstreet.com