Reactor dosimetry
Tiret rouge


A platform of measurement tools accredited COFRAC/Tests.​​​​​

Our dosimetry platform called MADERE (measurements applied to in-vessel dosimetry) is designed to measure the specific radioactivity of solid samples emitting photonic gamma or X-rays.
This facility meets the needs of experimental dosimetry programmes with all types of neutron sources (mock-up reactors, test reactors in France and overseas, neutron generators, the RES and the future JHR), as well as the needs of the reactor vessel irradiation monitoring programme for the EDF nuclear power fleet. MADERE is accredited ‘COFRAC/Tests’.
MADERE is a CEA facility made available under the International Centres of Excellence based on Research Reactors (ICERR) since 2020. The IAEA relies on this network to support its Member States in quickly gaining access to nuclear infrastructure in order to achieve the objective of consolidating R&D capacities across the board.

Several measurement systems are installed in the MADERE facility and are used for:

  • Conventional γ measurements:
    Measurement of all γ-emitting samples existing in dosimetry whose activity level ranges between 10 Bq and 10 MBq. The energy range of γ radiation falls between 50 keV and 2 MeV.

  • High-efficiency γ measurements:
    Samples with an activity level above 0.1 Bq can be measured.

  • X-ray measurements:
    The energy range of X-rays falls between 10 keV and 90 keV. The absolute activity level of any X-ray emitting sample is also determined by this measurement method, which has yet to be accredited by COFRAC.

These measurement systems are associated with extremely accurate weighing equipment comprising two microscales, as well as different shaped dosimeters: disks with diameters between 1 mm to 30 mm and thicknesses between 0.1 mm and 3 mm, wires of several tens of millimetres to 1 mm in diameter, sometimes encapsulated in quartz, strips of several tens of microns in thickness.

To meet the different requirements involved in monitoring activity levels and ensuring the traceability of information needed to provide customers with reliable results, the MADERE platform also develops and uses computerised management tools to reach an optimal level of efficiency and productivity.​

​Activités. © IRESNE/CEA​​


  • Reactor dosimetry,
  • γ and X-ray measurements,
  • Certification,
  • Operation of environmentally regulated facilities.
​Equipements majeurs. © IRESNE/CEA

Major equipment

  • Measurement systems,
  • HPGe detectors,
  • Accurate microscales.
​​Chiffres clés. © IRESNE/CEA​​

​Key figures

  • 4 staff members,
  • Several R&D projects:
    - Improvement of modelling of detectors/ diodes
    - Validation of the TRIPOLI4 code package used to predict the embrittlement of vessel steels
    - Experimental validation of the fast reduction in the flux on vessels to support core and absorber assembly design change requests
    - Characterisation of the cobalt concentration in AlCo dosimeters, etc.
​​Partenaires. © IRESNE/CEA​​


About ten clients and industry partners

  • LNHB,
  • EDF,
  • JSI,
  • IAEA
  • IRSN,
  • CT2M​
  • EPFL
  • EWGRD,
  • Etc.​