If the US government was serious about wanting to let nuclear power development happen in the US, they should set up a location where companies could work with live nuclear material while developing reactors. Workers could be required to have some type of security clearance and each company could have its own building(s) to avoid "mistakes" at one company from effecting other companies people and worksites. OSHA rules could be relaxed to allow quicker development, as everyone working there will be well informed of the radiation risks. The former nuclear test site in Nevada would seem to be a great location for this.