Tennessee Valley Authority's Sequoyah 1 plant accident

1981 accidental
8 workers are contaminated when coolant fund leaked into the contaminant building of the Tennessee Valley Authority's Sequoyah 1 plant in Tennessee.

More than 100,000 gallons of radioactive coolant fluid was involved in the leak.

Link
http://www.atomicarchive.com/Reports/Japan/Accidents.shtml