Do you want to find out your radiation protection level?
Radiation protection calculations: a customized service from Lemer Pax. With the radiation protection calculations produced by Lemer Pax, you can develop products and services for research, industry or medical applications without going through the usual experimentation processes. We provide customized support to help determine the thickness and nature of the radiation protection required.
Calculation methods
Two calculation methods are used in our radiation protection studies:
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| Calculations using a direct beam radiation attenuation program developed by Lemer Pax (deterministic method). | Calculations using a Monte-Carlo type algorithm (stochastic method). We then develop specifications that take into account the source terms used, the technical features and requirements, facility plans, and your own specifications. |
Different radiation protection calculations
Based on our vast experience in radiation protection and medical physics, Lemer Pax offers you a made-to-measure service, including:
Shielding calculation
Determines the nature and thickness of the material needed to achieve a given attenuation factor or percentage.
Dose calculation, zoning and workstation study
Maps ionizing radiation exposure and determines the related dose rates and zoning.
Models and simulations
These studies provide a 3D view and accurate dose map. The methodology differs depending on the type and level of radiation.
A typical example:
Two calculation methods are used in our radiation protection studies:
Radiation therapy requires the use of particle accelerators for treating tumours by means of ionizing radiation. Given that the characteristics of the equipment proposed by suppliers are all different, a dedicated radiation protection calculation must be carried out to determine the biological shielding required to protect both the operators and the public. An initial study can be conducted using deterministic methods in order to perform a design calculation.
In this case, the result is expressed in shielding thicknesses. Subsequently, these results may be supplemented by Monte-Carlo methods in order to obtain a more detailed study.
In this case, the deliverable is a detailed model of the zone.
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| 2D modelling of the zone for calculating the thicknesses of each of the room’s walls using deterministic methods. | Zoning study carried out using the Fluka Monte Carlo simulation tool. |
Standards and references:
The radiation protection levels are determined based on the fixed exposure limits for personnel laid down in articles R 4451-12, R 231-73 and R 4451-44 of the French Labour Code and for the general population in article R 1333-8 of the French Public Health Code. Moreover, these radiation protection levels are also determined according to the provisional classification for the various adjacent rooms, based on the provisions of the French Decree dated 15 May 2006.
The radiation protection levels determined comply with the ALARA principle in order to ensure that the dose rates of operators working in the facilities and the general public on site is kept at a level that is as low as reasonably achievable.
France
