4,818 research outputs found
MCNP6 Simulation of Reactions of Interest to FRIB, Medical, and Space Applications
The latest, production, version of the Los Alamos Monte Carlo N-Particle
transport code MCNP6 has been used to simulate a variety of particle-nucleus
and nucleus-nucleus reactions of academic and applied interest to the Facility
for Rare Isotope Beams (FRIB), medical isotope production, space-radiation
shielding, cosmic-ray propagation, and accelerator applications, including
several reactions induced by radioactive isotopes, analyzing production of both
stable and radioactive residual nuclei. Here, we discuss examples of validation
and verification of MCNP6 compared to recent neutron spectra measured at the
Heavy Ion Medical Accelerator in Chiba, Japan; to spectra of light fragments
from several reactions measured recently at GANIL, France; INFN Laboratori
Nazionali del Sud, Catania, Italy; COSY of the Julich Research Center, Germany;
and to cross sections of products from several reactions measured lately at
GSI, Darmstadt, Germany; ITEP, Moscow, Russia; LANSCE, LANL, Los Alamos, USA.
As a rule, MCNP6 provides quite good predictions for most of the reactions we
analyzed so far, allowing us to conclude that it can be used as a reliable and
useful simulation tool for FRIB, medical, and space applications involving
stable and radioactive isotopes.Comment: 4 pages, 4 figures, Proc. 2nd Conference on "Advances in Radioactive
Isotope Science" (ARIS2014) June 1-6, 2014, Tokyo, Japan, to be published in
JPS Conference Proceeding
Radiological characterisation in view of nuclear reactor decommissioning: On-site benchmarking exercise of a biological shield
Nearly all decommissioning and dismantling (D&D) projects are steered by the characterisation of the plant being dismantled. This radiological characterisation is a complex process that is updated and modified during the course of the D&D. One of the tools for carrying out this characterisation is the performance of in-situ measurements.
There is a wide variety of equipment and methodologies used to carry out on-site measurements, depending on the environment in which they are to be carried out and also on the specific objectives of the measurements and the financial and personnel resources available. The extent to which measurements carried out with different types of equipment or methodologies providing comparable results can be crucial in view of the D&D strategy development and the decision-making process.
This paper concerns an on-site benchmarking exercise carried out at the activated biological shield of Belgian Reactor 3 (BR3). This activity allows comparison and validation of characterisation methodologies and different equipment used as well as future interpretation of final results in terms of uncertainties and sensitivities. This paper describes the measurements and results from the analysis of this exercise. Other aspects of this exercise will be reported in separate papers. This paper provides an overview of the on-site benchmarking exercise, outlines the participating organisations and the measurement equipment used for total gamma, dose rate and gamma spectrometry measurements and finally, results obtained and their interpretations are discussed for each type of measurement as a function of detector type.
Regarding the dose measurements, results obtained by using a large variety of equipment are very consistent. In view of mapping the inner surface of the biological shield the most appropriate equipment tested might be the organic scintillator, the BGO or even the ionisation chamber. In addition, for mapping this surface, the most appropriate total gamma equipment tested might be the LaBr(Ce), the thick organic scintillator or the BGO. These measurements can only be used as a secondary parameter in a relative way. Results for the gamma spectrometry are very consistent for all the equipment used and the main parameters to be determined
Radiological characterisation in view of nuclear reactor decommissioning: On-site benchmarking exercise of a biological shield
[EN] Nearly all decommissioning and dismantling (D&D) projects are steered by the characterisation of the plant being dismantled. This radiological characterisation is a complex process that is updated and modified during the course of the D&D. One of the tools for carrying out this characterisation is the performance of in-situ measurements.
There is a wide variety of equipment and methodologies used to carry out on-site measurements, depending on the environment in which they are to be carried out and also on the specific objectives of the measurements and the financial and personnel resources available. The extent to which measurements carried out with different types of equipment or methodologies providing comparable results can be crucial in view of the D&D strategy development and the decision-making process. This paper concerns an on-site benchmarking exercise carried out at the activated biological shield of Belgian Reactor 3 (BR3). This activity allows comparison and validation of characterisation methodologies and different equipment used as well as future interpretation of final results in terms of uncertainties and sensitivities.
This paper describes the measurements and results from the analysis of this exercise. Other aspects of this exercise will be reported in separate papers. This paper provides an overview of the on-site benchmarking exercise, outlines the participating organisations and the measurement equipment used for total gamma, dose rate and gamma spectrometry measurements and finally, results obtained and their interpretations are discussed for each type of measurement as a function of detector type.
Regarding the dose measurements, results obtained by using a large variety of equipment are very consistent. In view of mapping the inner surface of the biological shield the most appropriate equipment tested might be the organic scintillator, the BGO or even the ionisation chamber. In addition, for mapping this surface, the most appropriate total gamma equipment tested might be the LaBr3(Ce), the thick organic scintillator or the BGO. These measurements can only be used as a secondary parameter in a relative way. Results for the gamma spectrometry are very consistent for all the equipment used and the main parameters to be determined.INSIDER is a EU Horizon 2020 project and received funding from the Euratom Research and Training Programme 2014–2018 under grant agreement No 755554
A Frictional Cooling Demonstration Experiment with Protons
Muon cooling is the main technological obstacle in the building of a muon
collider. A muon cooling scheme based on Frictional Cooling holds promise in
overcoming this obstacle. An experiment designed to demonstrate the Frictional
Cooling concept using protons was undertaken. Although the results were
inconclusive in the observation of cooling, the data allowed for the
qualification of detailed simulations which are used to simulate the
performance of a muon collider.Comment: 24 Pages 16 figures 2 table
Robotic equipment carrying RN detectors: requirements and capabilities for testing
77 pags., 32 figs., 5 tabs.-- ERNCIP Radiological and Nuclear Threats to Critical Infrastructure Thematic Group . -- This publication is a Technical report by the Joint Research Centre (JRC) . -- JRC128728 . -- EUR 31044 ENThe research leading to these results has received funding from the European Union as part of
the European Reference Network for Critical Infrastructure Protection (ERNCIP) projec
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