Conference Proceeding

Identification of Actinides Inside Nuclear Waste Packages by Measurement of Fission Delayed Gammas

DRT, CEA Saclay, Gif-sur-Yvette
IEEE Nuclear Science Symposium conference record. Nuclear Science Symposium 12/2006; DOI:10.1109/NSSMIC.2006.355994 pp.909 - 913 In proceeding of: Nuclear Science Symposium Conference Record, 2006. IEEE, Volume: 2
Source: IEEE Xplore

ABSTRACT A characterization of the alpha-activity due to the presence of actinides inside nuclear waste packages is necessary to select the best mode of storage. Non-destructive active methods, based on fission process, allow to quantify the global mass of actinides. However, these measurements give no information on the nature of isotopes in most cases. We are currently developing a method to identify actinides (235U, 238U, 239Pu), based on the detection of delayed gammas emitted by fission products. The delayed gamma spectrum can be regarded as a "fingerprint" of the irradiated sample. Qualitative and quantitative analysis of peaks allow an identification of actinides. The main purpose of this paper is twofold. First, basis of this method of differentiation are described. Then, experimental results obtained in fission and photofission are presented, in particular in the case of mixtures containing several actinides.

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Keywords

actinides
 
alpha-activity
 
delayed gamma spectrum
 
detection
 
experimental results
 
fingerprint
 
global mass
 
irradiated sample
 
isotopes
 
main purpose
 
measurements
 
Non-destructive active methods
 
nuclear waste packages
 
photofission
 
quantitative analysis
 

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