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The Radiation Control Board on April 14, 2010 approved a new rule that required EnergySolutions to conduct a performance assessment before disposing of depleted uranium. The Board's action was based on the fact that DU's radioactivity increases over a very long period of time. In addition, NRC did not evaluate shallow land disposal of DU when it developed its low-level radioactive waste disposal regulations. In the absence of federal regulation, the Board adopted the new rule.
The Depleted Uranium Performance Assessment Rule, R313-25-8, "Technical Analysis" is posted on the DRC Web.
The assessment was originally due on December 31, 2010 however, EnergySolutions asked for another two months, in part to take into account the input received during a series of scoping meetings that have taken place this year. To read more Information on the scoping meetings.
The assessment is expected by the end of February. Once it is received, the staff will review it for completeness and then start a technical review of the Performance Assessment. A stakeholder workshop on the topic is also anticipated.