Ecological Dose Modeling of Aquatic and Riparian Receptors to Strontium-90 with an Emphasis on Radiosensitive Organs

Poston, Ted M. ; Traub, Richard J. ; Antonio, Ernest J.

Pacific Northwest National Laboratory (U.S.)

关键词: Resrad Biota;    Monte Carlo Simulations;    Biota Dose Rate;    Strontium-90;    Kidney Dose;   

DOI  :  10.2172/1052954
RP-ID  :  PNNL-20529
RP-ID  :  AC05-76RL01830
RP-ID  :  1052954

美国|英语

来源: UNT Digital Library

【 摘 要 】

The 100-NR-2 site is the location of elevated releases of strontium-90 to the Columbia River via contaminated groundwater. The resulting dose to aquatic and riparian receptors was evaluated in 2005 (DOE 2009) and compared to U.S. Department of Energy (DOE) dose guidance values. We have conducted additional dose assessments for a broader spectrum of aquatic and riparian organisms using RESRAD Biota and specific exposure scenarios. Because strontium-90 accumulates in bone, we have also modeled the dose to the anterior kidney, a blood-forming and immune system organ that lies close to the spinal column of fish. The resulting dose is primarily attributable to the yttrium-90 progeny of strontium-90 and very little of the dose is associated with the beta emission from strontium-90. All dose modeling results were calculated with an assumption of secular equilibrium between strontium-90 and yttrum-90.