South African Nuclear Energy Corp. announced this month that a leak has resulted in a global shortage of molybdenum-99, the precursor for Tc-99m used in a majority of molecular imaging scans. Authorities reportedly conducted an investigation Nov. 12 at the NTP plant in Pelindaba, just shy of 20 miles from the capital of Pretoria.

It was estimated that the leak began Nov. 2. and was comprised of noble gas and iodine. Repairs are underway and the NTP plant will await independent review and authorization from the National Nuclear Regulator before operation can begin again.