Radiation Protection Department

 

Atmospheric dispersion modelling of radioactive contaminants

The development of the 2nd version of the SINAC programme system was finished in 2012. SINAC is developed to follow the consequences of radioactive releases of a (hypothetical) nuclear accident. Atmospheric dispersion, plume depletion by dry-out and wash-out, cloudshine and groundshine doses, dose consequences of inhalation and ingestion, early and late health effects are computed in the software. Effects of the introduction of countermeasures are also taken into account. The SINAC system has gone through a lot of development in the last few years according to users’ needs and to the Hungarian and the international regulations and protocols of radiation protection. Continuous development ensured that the SINAC environmental simulator was used as an interactive expert system in the Hungarian Atomic Energy Authority Centre for Emergency Response, Training and Analysis in the last decade. Since the latest requirements on the programme that were based on principles set forth one and a half decades ago could have been met only by considerable compromises in the future, it was claimed in 2009, that the course of development of SINAC should be reconsidered, and a new version should be created using the potentials of the present-day information technology. The common goal of the development in the last several years was to obtain easily usable, flexibly developable software that gives results comparable to those of other software products being developed in international collaboration.

Space dosimetry

The international collaboration programmes in the field of onboard dosimetry of the International Space Station (ISS) continued in 2012. The Space Dosimetry Group participated in several personal and environmental dosimetry projects onboard the ISS in cooperation with the RussianAcademy of Sciences Institute of Biomedical Problems (DoseMap, BioTrack), the European Space Agency (DOSIS-3D) and the Japan Aerospace Exploration Agency (Matroshka-2B-KIBO). The data of Pille-MKS measurements acquired on the ISS were also processed.

The TriTel detector system developed for space dosimetry was launched, and arrived to the ISS Columbus module in 2012. The first few days of data has been received and analysed. The preliminary evaluation of the data proves that the TriTel provides valuable, good time resolution data to estimate the average quality factor of the Low Earth Orbit radiation environment. Measurements by the Tritel and the Pille dosimeter systems were also performed on board the BEXUS-14 stratospheric balloon.

Monitoring of Rosetta spacecraft designed to orbit around and land on Comet 67P/Churyumov-Gerasimenko also continued.

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