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This paper reports a feasibility study, performed by numerical simulation with MCNPX PoliMi v2.0, for plutonium characterization in radioactive waste packages by passive neutron coincidence counting with plastic scintillators. Owing to their low cost and good detection efficiency for fast neutrons, these last could indeed constitute a good alternative to 3He proportional counters, now too costly because...
The French national collaboration CLaRyS aims at the on-line monitoring of hadron therapy by means of imaging nuclear reaction products that are related to the ion range. For this purpose, the MoniDiam project is dedicated to the development of a large area detector with a high detection efficiency for the primary carbon or proton beams, giving time and position measurements at count rates greater...
This paper reports a numerical feasibility study of a passive neutron coincidence counting system for radioactive waste drums with plastic scintillators. The motivation is to replace 3He gas counters generally used for this type of measurement. Indeed, plastic scintillators present several advantages for the measurement of neutron coincidences such as a good efficiency for detecting fast neutrons,...
In view of long-term radioactive waste repository, the Differential Die away Technique (DDT) can be used to determine the amount of fissile materials, mainly 239Pu and 235U, in 225 L bituminized waste drums by detecting prompt and delayed fission neutrons between the pulses of a deuterium-tritium neutron generator. A complementary approach studied in this paper is to detect fission delayed gamma rays...
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