In general terms, the current approach to assessing potential risks to nonhuman biota from radiation and radioactivity in the environment involves:
• estimation of the levels of radioactivity in the biota arising from levels of radioactivity in the environment;
• estimation of the consequent dose or dose rate to biota arising from both the internally deposited radioactivity and the external radiation from the environment in which it lives; and
• comparison of the calculated dose (dose rate) to a reference dose (dose rate).
To facilitate the implementation of this approach, five key elements are defined and are summarized in Table 1. Further discussion on each of these aspects is provided in the following sections.
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