| Autor: |
Zsigrai, Jozsef, Berlizov, Andriy, Bagi, Janos, Muehleisen, Artur |
| Předmět: |
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| Zdroj: |
Journal of the Institute of Nuclear Materials Management; 2022, Vol. 50 Issue 1, p132-140, 9p |
| Abstrakt: |
The capability of the Fixed-Energy, Response Function Analysis with Multiple Efficiency (FRAM) software to accurately determine the isotopic composition of shielded uranium and plutonium was tested by the Joint Research Centre in Karlsruhe to support the use of FRAM by safeguards inspectors in the field. More than 17,000 spectra of certified uranium and plutonium reference materials were analyzed using different FRAM parameter sets. Uranium spectra were recorded by the ORTEC Detective spectrometer and analyzed by FRAM v5.1. Plutonium spectra were recorded by the ORTEC Micro-Detective spectrometer and analyzed by FRAM v5.2. The performance of FRAM was evaluated as a function of shielding thickness, measurement time, isotopic composition, and spectrum quality. The spectrum quality was quantified using a numerical figure-of-merit constructed from the uncertainties of the peak areas relevant for the isotopic analysis. A new FRAM parameter set for analyzing uranium spectra taken by the ORTEC Detective was developed. This provided more accurate results than the default parameter sets. In the case of plutonium samples, the default parameter sets were found to be optimal and could not be further improved. It was shown how FRAM's automatic analysis option improves the plutonium isotopic results, especially in the case of lower quality spectra. The results of this work will help safeguards inspectors optimize the use of electrically cooled gamma spectrometers and improve the accuracy of isotopic composition measurements in the field. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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