TY - JOUR
T1 - Thermal runaway of nitric acid-soaked kitty litter in transuranic waste
AU - Hobbs, Michael L.
AU - Britt, Phillip F.
AU - Hobbs, David T.
AU - Kaneshige, Michael J.
AU - Minette, Michael
AU - Mintz, Jessica
AU - Pennebaker, Frank M.
AU - Parker, Gary R.
AU - Pierce, Robert
AU - Rosenberg, David M.
AU - Schwantes, Jon
AU - Williams, Audrey
N1 - Publisher Copyright:
© 2022
PY - 2022/11
Y1 - 2022/11
N2 - Precise wording is important in every field of study, including operational procedures. Confusion in the wording “organic” and “inorganic” may have contributed to substitution of an organic kitty litter for an inorganic adsorbent used to prepare nuclear waste for disposal at an underground salt repository. Adsorbents prevent liquids like nitric acid from causing corrosion within the waste drums. However, combination of organic material with nitric acid can cause heat- and gas-generating reactions resulting in thermal runaway, rapid pressurization, and drum rupture. In 2014, waste Drum 68660 containing nitric acid-soaked organic kitty litter exploded and released transuranic waste into the repository. The cause of the accident was never identified. Here we show that the root cause of Drum 68660 igniting was restriction of the drum vent resulting in accelerated nitric acid chemistry, thermal runaway, and radiation dispersal.
AB - Precise wording is important in every field of study, including operational procedures. Confusion in the wording “organic” and “inorganic” may have contributed to substitution of an organic kitty litter for an inorganic adsorbent used to prepare nuclear waste for disposal at an underground salt repository. Adsorbents prevent liquids like nitric acid from causing corrosion within the waste drums. However, combination of organic material with nitric acid can cause heat- and gas-generating reactions resulting in thermal runaway, rapid pressurization, and drum rupture. In 2014, waste Drum 68660 containing nitric acid-soaked organic kitty litter exploded and released transuranic waste into the repository. The cause of the accident was never identified. Here we show that the root cause of Drum 68660 igniting was restriction of the drum vent resulting in accelerated nitric acid chemistry, thermal runaway, and radiation dispersal.
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U2 - 10.1016/j.psep.2022.09.047
DO - 10.1016/j.psep.2022.09.047
M3 - Article
AN - SCOPUS:85138829603
SN - 0957-5820
VL - 167
SP - 543
EP - 549
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
ER -