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CERN Document Server 15 records found  1 - 10próximo  jump to record: Search took 0.61 seconds. 
1.
Transfer functions for $Q_A/Q_B$ international regulatory limits for the safe transport of radioactive materials / Frosio, Thomas (SLAC) ; Thomas, Samuel (IRSN, France) ; Endres, Janis ; Eberhardt, Holger ; Louis, Baptiste (IRSN, France) ; Cabianca, Tiberio ; Brown, Iain ; Foster, Matthew ; Menaa, Nabil (CERN) ; Bertreix, Philippe (CERN)
Abstract This paper presents a proposed revision of the International Atomic Energy Agency transport regulations, related to the A 1 and A 2 limit values used to determine the radioactive transport classification. Based on the ‘Q system’, a novel methodology was introduced to derive QA and QB values related to scenarios involving external exposure from a distant source. [...]
2024 - 14 p. - Published in : J. Radiol. Prot. 44 (2024) 031504 Fulltext: PDF;
2.
Calculation and benchmark of fluence-to-local skin equivalent dose coefficients for neutrons with FLUKA, MCNP, and GEANT4 Monte-Carlo codes / Frosio, Thomas (CERN) ; Bertreix, Philippe (CERN) ; Menaa, Nabil (CERN) ; Thomas, Samuel (IRSN, France)
Dose equivalent limits for single organs are recommended by the ICRP (International Commission for the Radiological Protection publication 103). These limits do not lend themselves to be measured. [...]
2021 - 15 p. - Published in : Journal of Radiological Protection 41 (2021) 564-578 Fulltext: PDF;
3.
Photons fluence to local skin Dose coefficients and benchmark with three Monte-Carlo codes. Application to the computation of radioactive material transport limits / Frosio, Thomas (CERN) ; Bertreix, Philippe (CERN) ; Menaa, Nabil (CERN) ; Thomas, Samuel (IRSN, France) ; Eberhardt, Holger (Gesellschaft für Anlagen- und Reaktorsicherheit) ; Endres, Janis (Gesellschaft für Anlagen- und Reaktorsicherheit)
Fluence to Local Skin Dose Conversion Coefficients (LSD-CC) are radiological protection quantities used for external radiation exposures which allow the conversion of particle fluences into local skin equivalent dose. The International Commission on Radiological Protection published LSD-CC for electrons with an energy range from 10 keV to 10 MeV. [...]
2021 - 8 p. - Published in : Appl. Radiat. Isot. 176 (2021) 109892 Fulltext: PDF;
4.
Computation of radioactive material transport limits within A1/A2 Working Group at IAEA TRANSSC / Frosio, Thomas (CERN) ; Bertreix, Philippe (CERN) ; Theis, Chris (CERN) ; Donjoux, Yann (CERN) ; Cabianca, Tiberio (Public Health England, London) ; Brown, Iain (Public Health England, London) ; Foster, Matthew (Public Health England, London) ; Endres, Janis (Gesellschaft für Anlagen-und Reaktorsicherheit, Cologne) ; Eberhardt, Holger (Gesellschaft für Anlagen-und Reaktorsicherheit, Cologne) ; Hayakawa, Nobuhiro (MHI NS Engineering Company, Yokohama) et al.
IAEA's (International Atomic Energy Agency) publication SSG-26 defines a methodology for calculating A1/A2 values. These values were conceived as limits for the transport of radioactive goods, to limit the public's exposure to radiation in the event of an accident. [...]
2020 - 15 p. - Published in : IEEE Access 8 (2020) 29040-29054 Fulltext: PDF;
5.
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
6.
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;
7.
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;
8.
Qualification of the activities measured by gamma spectrometry on unitary items of intermediate-level radioactive waste from particle accelerators / Dyrcz, Patrycja (CERN) ; Frosio, Thomas (CERN) ; Menaa, Nabil (CERN) ; Magistris, Matteo (CERN) ; Theis, Chris (CERN)
In the frame of maintenance, upgrade and dismantling activities, activated equipment are removed from the accelerator complex and require characterization in view of their disposal as radioactive waste. The characterization process consists of a series of radiation measurements, complemented by analytical studies, which quantify the activity of radionuclides inside an object. [...]
2021 - Published in : Appl. Radiat. Isot. 167 (2021) 109431 Fulltext: PDF;
9.
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;
10.
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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