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  • 1 Canberra Industries Inc. 800 Research Parkway Meriden CT 06450 USA
  • | 2 Harwell International Business Centre Canberra-Harwell Ltd., B528.10 Unit 1 Didcot Oxfordshire OX11, 0TA UK
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Abstract  

The application of quantitative high-resolution gamma-ray spectrometry for the non-destructive assay of plutonium bearing items, such as waste drums, is complicated by self-attenuation if the plutonium is present as lumps. By definition, lumps are small compared to the bulk matrix and so are not accounted for in the gross matrix correction yet can exert a significant influence on the assay result. Compared to a calibration using dilute standards, self-attenuation results in an under-reporting of the mass of plutonium present. The availability of representative standards is unrealistic for diverse waste streams and so a means to detect and compensate for the presence of lumps is needed. An experimental approach that can in principle generate an item specific correction factor is to exploit the differential attenuation between a set of gamma-lines of known relative emission intensity. In the case of routine measurements of drummed Pu wastes the choice of lines is often limited, the most appropriate often being those at 129 keV and 414 keV from 239Pu. This paper discusses the problems and potential of exploiting this pairing in a simple dual energy approach to the long standing and challenging problem of self-attenuation.

Manuscript Submission: HERE

  • Impact Factor (2019): 1.137
  • Scimago Journal Rank (2019): 0.360
  • SJR Hirsch-Index (2019): 65
  • SJR Quartile Score (2019): Q3 Analytical Chemistry
  • SJR Quartile Score (2019): Q3 Health, Toxicology and Mutagenesis
  • SJR Quartile Score (2019): Q2 Nuclear Energy and Engineering
  • SJR Quartile Score (2019): Q3 Pollution
  • SJR Quartile Score (2019): Q3 Public Health, Environmental and Occupational Health
  • SJR Quartile Score (2019): Q3 Radiology, Nuclear Medicine and Imaging
  • SJR Quartile Score (2019): Q3 Spectroscopy
  • Impact Factor (2018): 1.186
  • Scimago Journal Rank (2018): 0.408
  • SJR Hirsch-Index (2018): 60
  • SJR Quartile Score (2018): Q2 Nuclear Energy and Engineering
  • SJR Quartile Score (2018): Q2 Pollution

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
4
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)