A federal task force calls for tighter regulations of the nation’s nuclear power plants. The task force says radioactive tritium leaks have been discovered at power plants throughout the country, including the Callaway nuclear power plant operated by AmerenUE. The task force report says those leaks pose no public health hazard, but should be addressed by tighter regulation of equipment that, at present, is exempt from regular inspection and maintenance. AmerenUE reported in June that small amounts of tritium had leaked from a discharge pipeline carrying cooling water and low-level radioactive waste to the Missouri River. The utility says no material reach the local water supply or harmed crops.