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A new gamma spectroscopy methodology based on probabilistic uncertainty estimation and conservative approach / Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Duchemin, Charlotte (CERN) ; Riggaz, Nicolas (CERN) ; Theis, Chris (CERN)
The gamma spectroscopy technique is commonly used in many applications to evaluate the activity of gamma emitters in a given sample. This assessment of activity is of particular interest for the disposal of radioactive waste or for clearance purposes. [...]
2020 - Published in : Appl. Radiat. Isot. 155 (2020) 108929 Fulltext: PDF;

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(91)

A novel technique for the optimization and reduction of gamma spectroscopy geometry uncertainties / Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Bertreix, Philippe (CERN) ; Rimlinger, Maeva (CERN) ; Theis, Chris (CERN)
Material activation can sometimes cause large heterogeneities in the distribution of radioactivity (hotspots). Moreover, the sample geometry parameters are not always well known. [...]
2020 - 16 p. - Published in : Appl. Radiat. Isot. 156 (2020) 108953 Fulltext from publisher: PDF;

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(64)

New methodology for in-situ classification of radiological items with a clearance monitor system / Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Dumont, Gérald (CERN) ; Aberle, Frédéric (CERN)
Maintenance activities and operations of high-energy particle accelerators can lead to the collection ofradioactive equipment as well as waste materials. In order to ensure their proper classification as radioactiveor non-radioactive, one has to quantify the activities of radionuclides produced. [...]
2020 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 966 (2020) 163847 Fulltext: PDF;

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(60)

Qualification of gamma spectrometry measurement for the radiological characterization of mixed VLLW cables in particle accelerators / Rimlinger, Maeva (CERN) ; Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Magistris, Matteo (CERN) ; Theis, Chris (CERN)
In the framework of maintenance activities in particle accelerators, such as upgrades and dismantling, a large number of activated equipment are removed from the accelerator complex and require characterization in view of their disposal as radioactive waste. In particular, cables can be of different types. [...]
2020 - 10 p. - Published in : Appl. Radiat. Isot. 166 (2020) 109419 Fulltext: PDF;

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(58)

Classification of radiological objects at the exit of accelerators with a dose-rate constraint / Frosio, Thomas (CERN) ; Dumont, Gerald (CERN) ; Froeschl, Robert (CERN) ; Iliopoulou, Elpida (CERN) ; Magistris, Matteo (CERN) ; Menaa, Nabil (CERN) ; Roesler, Stefan (CERN) ; Theis, Chris (CERN) ; Vincke, Heinz (CERN) ; Vincke, Helmut (CERN)
Maintenance activities and operations of high-energy particle accelerators can lead to the collection of radioactive equipment as well as waste materials. In order to ensure their proper classification as radioactive or non-radioactive, one has to quantify the activities of radionuclides produced. [...]
2020 - 13 p. - Published in : Appl. Radiat. Isot. 165 (2020) 109303 Fulltext: PDF;

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(48)

An enhanced characterization process for the elimination of very low level radioactive waste in particle accelerators / Frosio, Thomas (CERN) ; Bertreix, Philippe (CERN) ; Magistris, Matteo (CERN) ; Menaa, Nabil (CERN) ; Michaud, Régis (CERN) ; Rimlinger, Maeva (CERN) ; Theis, Chris (CERN) ; Ulrici, Luisa (CERN) ; Zaffora, Biagio (CERN)
The elimination of very low level waste towards the French national repository requires their radiological characterization to estimate the radionuclide inventory and the associated activities within a waste package. Such characterization is performed by means of activation calculations and measurements. [...]
2020 - Published in : Appl. Radiat. Isot. 166 (2020) 109312

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(45)

Radiological characterization of large electromagnets in view of their elimination as very low-level wastes / Frosio, Thomas (CERN) ; Magistris, Matteo (CERN) ; Menaa, Nabil (CERN) ; Michaud, Régis (CERN) ; Rimlinger, Maeva (CERN) ; Theis, Chris (CERN)
The operation of particle accelerators at CERN requires the use of electromagnets, which are accelerator components used to guide and focus charged particles. In the framework of maintenance activities and machine upgrades or dismantling, a large number of magnets are removed from the accelerator complex and required characterization in view of their disposal as radioactive waste. [...]
2020 - 13 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 959 (2020) 163493 Fulltext from publisher: PDF;

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(44)

Spectrum and Yield to Dose Conversion Coefficients for Beta Skin Doses Linked to the Q System / Frosio, Thomas (CERN) ; Bertreix, Philippe (CERN) ; Köster, Ulli (Laue-Langevin Inst.) ; Theis, Christian (CERN) ; Magistris, Matteo (CERN)
Monte Carlo simulations are a state-of-the-art method to calculate dose coefficients and could be used with the Q system for radioactive material packaging. These simulations often take a long time to converge with sufficient precision. [...]
2019 - 12 p. - Published in : Health Phys. 116 (2019) 607-618 Fulltext: PDF;

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On the holistic validation of electronic materials compound for irradiation study - Experimental and calculated results / Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Magistris, Matteo (CERN) ; Theis, Chris (CERN)
Due to the large variations of chemical compositions in electronic material, the estimation of the radionuclide inventory following irradiation represents a technical challenge at CERN high-energy particle accelerators. In particular, the activation of printed circuit boards is of concern to the CERN experiments as they are widely used for various purposes ranging from safety systems to sub-detector controls. [...]
2020 - 14 p. - Published in : J. Radioanal. Nucl. Chem. 326 (2020) 11-24 Fulltext: PDF;

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Generation of low-energy neutrons cross-sections for the Monte Carlo code FLUKA and the deterministic code ActiWiz / Frosio, Thomas (CERN) ; Magistris, Matteo (CERN) ; Theis, Chris (CERN) ; Vincke, Helmut (CERN)
Activation of material is of interest for waste treatment and hazard assessment. In particular, activation of printed circuit can lead to the production of radionuclides at an isomeric state, for example, coming from silver. [...]
2020 - 6 p. - Published in : Appl. Radiat. Isot. 166 (2020) 109352 Fulltext: PDF;

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