Dose Averted By Populations Following The Rehabilitation Of A Territory Contaminated By The Fallout...

Universities and Institutes of France
October 03, 2022
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  • Organisation/Company: Institut de radioprotection et de sûreté nucléaire
  • Research Field: Environmental science › Ecology
  • Researcher Profile: First Stage Researcher (R1)
  • Application Deadline: 03/10/2022 00:00 - Europe/Brussels
  • Location: France › Fontenay-aux-Rose (Paris metro area)
  • Type Of Contract: Temporary
  • Job Status: Full-time
  • In the frame of a project funded by BPl France (call “Plan de relance pour l'industrie - Secteur stratégique Nucléaire”), IRSN is committed to developing and validating decision support tools that will provide decision- makers and the general public with information on the choice of remediation actions to be implemented in post-nuclear crisis situations, to promote the recovery of territories.

    In this context, the objective of this 18-month post-doctoral fellowship is to propose a method to evaluate different remediation strategies for territories contaminated by atmospheric fallout of radiocesium (eg 134Cs, 136Cs, 137Cs) and then to apply this method to two typical situations: the Fukushima accident in Japan and a hypothetical accident in France. The method will in particular target the definition of a new criterion: the “dosimetric gain” (a concept derived from occupational dosimetry), that is to say the balance between the averted dose (decrease of the population exposure, thanks to the remediation) versus the additional dose (exposure of the workers engaged in remediation).

    The assessment will focus on agricultural, forestry, and urban areas using transfer and dosimetric impact models developed or to be developed in the IRSN SYMBIOSE platform. The selection of regions of interest, target populations (eg children, rural adults, workers) and remediation actions to be considered in the cases of application (eg stripping or ploughing of agricultural or forest soils, cleaning of urban areas, etc) will be done in consultation with the other actors of the project.

    The first step will be to characterize the different remediation actions in agricultural, forestry and urban environments, in order to achieve a detailed specification of a (new) SYMBIOSE module allowing to quantify in a simple way the impact of these actions on the decrease of the levels of cesium contamination predicted in the environment (soils, plants, etc). In a second step, it will be necessary to specify the method for quantifying the volume of waste generated and the levels of contamination expected in this waste. The evaluation method will be based on the information provided by the remediation module (eg.areas treated, dates of application) as well as the levels of contamination predicted by the transfer models in the environmental compartments targeted by these actions (eg surface soil, plants, various man- made materials etc.). As in the previous step, the candidate will aim to specify in a detailed way a (new) SYMBIOSE module to be added downstream of the calculation chain. Concerning the evaluation of the transfer in the environment of atmospherically deposited cesium and its dosimetric impact on the population, the post-doc will benefit from existing SYMBIOSE modules. Once the chaining of the modules will be done, the candidate will proceed to the numerical simulations allowing to quantify the dosimetric gain for each of the application cases and each of the management strategies.

    Offer Requirements Specific Requirements

    You have strong skills in modelling and a PhD in environmental sciences, in earth sciences or in physics. You have experience of scientific programming with a software such as GoldSim, or R.

    Familiarity with remediation of contaminated soils/sites, or with occupational or environmental risk analysis, or with radiation protection would be assets.

    Expected qualities: analytical and synthetic skills, autonomy, team spirit, writing skills.

    Occasional travel in France and abroad is to be expected.

    Contact Information
  • Organisation/Company: Institut de radioprotection et de sûreté nucléaire
  • Organisation Type: Public Research Institution
  • Website: https:// www. irsn.fr
  • Country: France
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