Biokinetics of 238Pu oxides: Inferences from bioassay data

Poudel, Deepesh; Bertelli, Luiz; Klumpp, John A.; Dumit, Sara; Waters, Tom L.

doi:10.1088/1361-6498/aaf653

Biokinetics of ²³⁸Pu oxides: Inferences from bioassay data

Journal Article · Tue Feb 05 00:00:00 EST 2019 · Journal of Radiological Protection

DOI:https://doi.org/10.1088/1361-6498/aaf653· OSTI ID:1489966

Poudel, Deepesh ^[1]; Bertelli, Luiz ^[1]; Klumpp, John A. ^[1]; Dumit, Sara ^[1]; Waters, Tom L. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The bioassay data collected from several workers involved in ²³⁸Pu inhalation incidents have been analyzed using the most recent biokinetic models described in Occupational Intakes of Radionuclides (OIR) series of publications. Although all exposures were thought to be to ²³⁸Pu oxides, the observed urinary excretion patterns differed in different inhalation incidents. The urinary excretion from individuals involved in one of the incidents increased steadily with time peaking around 2-3 years before decreasing. This pattern is described in Part 4 of the OIR series using the ‘²³⁸PuO₂, ceramic’ model. This non-monotonic behavior, explained as being due to fragmentation and dissolution, was not specific to the incident, but was also observed in other incidents. The urinary excretion data collected from individuals involved in another incident showed dissolution behavior between Type M and Type S. Finally, the bioassay data from yet another incident showed a pattern that appears to represent behavior more insoluble than Type S, which is possibly a result of self-heating due to the decay heat from ²³⁸Pu. The urinary excretion patterns and the corresponding dose coefficients have been calculated and compared.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1489966

Alternate ID(s):: OSTI ID: 22914717

Report Number(s):: LA-UR--18-29587

Journal Information:: Journal of Radiological Protection, Journal Name: Journal of Radiological Protection Journal Issue: 1 Vol. 39; ISSN 0952-4746

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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