Detailed plan for the COMET WP3 initial research activity - list of research projects and goals, participants and timing

Detailed plan for the COMET Work Package (WP) 3

STAR deliverable (D-No. 3.3). International wildlife dosimetry workshop

This report summarises the main issues related with the International Wildlife Dosimetry Workshop, organized by STAR in June 2014. All the information of the workshop: the agenda, the presentations of all the speakers and the minutes of the discussion sessions can be freely downloaded from the STAR web page: https://wiki.ceh.ac.uk/display/star/ Wildlife+Dosimetry+Workshop. The workshop addressed a wide spectrum of questions related to the ionising radiation dose estimation in animals and plants, involving world leading experts in each of the subjects treated. There were 30 participants from 12 countries (Belgium, Canada, USA, Spain, France, Germany, Japan, Norway, Portugal, United Kingdom, Russia and Sweden)

Inter-comparison of population models for the calculation of radiation dose effects on wildlife

An inter-comparison of five models designed to predict the effect of ionizing radiation on populations of non-human wildlife, performed under the IAEA EMRAS II programme, is presented and discussed. A benchmark scenario \u27Population response to chronic irradiation\u27 was developed in which stable generic populations of mice, hare/rabbit, wolf/wild dog and deer were modelled as subjected to chronic low-LET radiation with dose rates of 0-5 x 10^-2 Gy day^-1 in increments of 10^-2 Gy day^-1. The duration of exposure simulations was 5 years. Results are given for the size of each surviving population for each of the applied dose rates at the end of the 1st to 5th years of exposure. Despite the theoretical differences in the modelling approaches, the inter-comparison allowed the identification of a series of common findings. At dose rates of about 10^-2 Gy day^-1 for 5 years, the survival of populations of short-lived species was better than that of long-lived species: significant reduction in large mammals was predicted whilst small mammals survive at 80-100 % of the control. Dose rates in excess of 2 x 10^-2 Gy day^-1 for 5 years produced considerable reduction in all populations. From this study, a potential relationship between higher reproduction rates and lower radiation effects at population level can be hypothesized. The work signals the direction for future investigations to validate and improve the predictive ability of different population dose effects models