The Nuclear Regulatory Commission will be in Columbia today for a hearing about two mishaps at the M.U. research reactor. Radiation escaped from a storage pool at the reactor in April. And workers failed to follow proper procedure in June during routine maintenance at the facility. NRC spokesman Jan Strasma says the agency will present its findings to the university and hear a report from M-U about how the reactor is fixing the problems. In three to four weeks, the NRC will either fine the reactor, give a less-severe notice of violation, or issue an order detailing changes the reactor staff must make.