A radiation leak at an underground nuclear waste dump in New Mexico was caused by "chemically incompatible" contents, including kitty litter, that reacted inside a barrel of waste causing it to rupture, scientists said on Thursday.
The U.S. Energy Department report on last year's radiation accident at the Waste Isolation Pilot Plant (WIPP) near Carlsbad showed that a drum of waste containing radioisotopes like plutonium was improperly packaged at the Los Alamos National Laboratory near Santa Fe before arriving for disposal.
The improper mix in the barrel, including the wrong sort of kitty litter used to absorb liquids, sparked a chemical reaction causing it to heat up and generate gases that dislodged its lid, spewing radioactive materials, investigators found.