Radiological Risk Assessment for King County Wastewater Treatment Division Page: 9 of 51
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Tables
T able 1. L ist of radionuclides of concern ................................................................................................ 8
Table 2. EPA limits from 40 CFR 141, National Primary Drinking Water Regulations............................ 11
Table 3. Initial Chemical and Physical Forms of Radionuclides ...............................................................14
Table 4. Estimates (in italics) of low and high ranges of percent of radioactive material entering a
combined sanitary and storm sewer system that will appear in various waste streams or be retained for
some time on surfaces within the system....................................................................................................17
Table 5. Dose rate constants for radionuclides emitting significant gamma radiation ......................... 22
Table 6. Percent or fraction of 60Co radiation transmitted through various depths of wate ..................24
Table 7. Concentration limits for discharge to sanitary sewage ............................................................ 25
Table 8. Concentrations of selected radionuclides that would deliver 1 rem per hour
to an infinite volume ................................................................................................................................... 26
T able 9. D irect Irradiation of the Public ................................................................................................. 28
Table 10. D irect Irradiation of W TD W orkers ....................................................................................... 29
Table 11. Direct radiation and aliquot radiation detection considerations............................................. 33vii
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Strom, Daniel J. Radiological Risk Assessment for King County Wastewater Treatment Division, report, August 5, 2005; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc902140/m1/9/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.