Master Thesis - Parameter study on radiological impact
ESS AB, European Spallation Source / Fysikjobb / Lund
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hela Sverige Name Department ESS
ESS Target Division
Name Supervisor at ESS
WP Leader Daniela Ene (DE)/Senior Scientist Kasper Andersson (KA)
Title of Master thesis/project
Parameter study on the environmental radiological impact from the ESS facility
Contact Information Supervisor
DE, European Spallation Source ESS ABP.O.Box 176, SE-221 00 Lund, SwedenVisiting address: Stora Algatan 4Mobile: +46 767 72 67 16e-mail:
daniela.ene@ess.se KA,
Radiation Research Division
Risø DTU
Technical University of Denmark
Risø National Laboratory for Sustainable Energy
Frederiksborgvej 399
Building 204
DK-4000 Roskilde
Denmark
Direct +45 4677 4173
Faxnummer: +45 4677 5330
kgan@risoe.dtu.dkPrimary Location
Risø DTU, 4000 Roskilde Denmark
Schedule
Months 0-4: Getting acquainted with the general modelling principles for the various relevant dose pathways, building up knowledge on parameters (e.g., tungsten dust production and behaviour, and various characteristics of produced radiocontaminants), and studying available modelling tools. Setting up scripts for automatic running and processing of results.
Months 5-8: Implementing suitable parameters in the agreed models, and running them to obtain data to facilitate sensitivity analyses. Data-processing and sensitivity analysis on the results.
Months 9-12: Drawing conclusions, writing the thesis and preparation for presentation.
Start Date
1 January 2012
End Date
31 December 2012
Estimated Presentation Date
20 December 2012
Project Description
The environmental risk from releases to atmosphere of radionuclides from ESS is evaluated by modeling atmospheric dispersion and deposition and subsequent environmental transfer to man and resulting radiation doses.
Atmospheric dispersion of contaminants following discrete releases of radioactive material in open terrain may be evaluated using tools such as the EU standard model COSYMA’s segmented Gaussian plume model, or the RIMPUFF / URD puff dispersion models from ARGOS might be applied. For continuous atmospheric releases, the EU standard model CREAM could be the primary tool, and may possibly be used together with ARGOS dispersion modelling tools.
The related endpoints governing dose to man will be calculated using a suite of state-of-the-art models, which will require new parameterization to accommodate the most important of the many ‘unusual’ radionuclides that ESS will produce. Such models might include ECOSYS for foodchain transfer modelling, MCNP, as required, for external dose contributions, the John Garland model for resuspension, Risø DTU’s own developed modelling methodologies (through 3 consecutive experimental European projects) for exposure from contamination on humans, and ICRP standard models for ingestion and inhalation dose estimation.
The aim is to perform sensitivity analyses of model endpoints defining consequences of releasing large amounts of radionuclides for hypothetical accident scenarios.
The amount of tungsten dust released from the target for such events is unknown. Therefore, variation of dust source terms is an important parameter to study.
Other required input parameters are: atmospheric release height and duration as well as atmospheric conditions.
The analysis will contribute to understand the importance of selected parameters on the radiation doses as well as to identify potential countermeasures following such events.
The project will be integrated in the ESS Work Package No. 11.
Prerequisites Student
Relevant technical background from a university, and good computing skills. Good language skills - both speaking, reading and writing (English and preferably also Nordic language).
The European Spallation Source ESS AB will design, build and operate a multi-disciplinary, large-scale research infrastructure based on the world’s most powerful neutron source. ESS will provide scientists with unique and powerful neutron scattering instruments for the study of a large range of materials – from polymers and pharmaceuticals to membranes and molecules. The ESS project is partnered by 17 European countries, and hosted by Sweden and Denmark. The ESS will be built in Lund, Sweden, by a collaboration of European scientists and engineers. ESS is planned to produce the first neutrons by 2019. When the facility is in full operation 2025, ESS has around 450 employees.
ESS aim to ensure that staff are employed on the basis of ability and the requirements of the job, and that no applicant or employee receives less favourable treatment because of race, religion, ethnic origin, gender, sexual orientation or disability.
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Publiceringsdatum2011-10-18Arbetstider och omfattningDag , Heltid , Sommarjobb
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FöretagESS AB, European Spallation Source
AdressESS AB, European Spallation Source
Stora Algatan 4
22350 Lund
Jobbnummer 1056829
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