Experimental method for verification of calculated Cs-137 content in nuclear fuel assemblies
| Autor: | Martin Bengtsson, Anders Sjöland, Ulrika Bäckström, Fredrik Johansson, Peter Jansson |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Nuclear fuel Astrophysics::High Energy Astrophysical Phenomena activity Analytical chemistry Condensed Matter Physics Subatomär fysik Nuclear Energy and Engineering Cs-137 Content (measure theory) Subatomic Physics Calibration nuclear fuel characterization Irradiation |
| Popis: | A method to determine the absolute activity of 137Cs in irradiated nuclear fuel is presented. Using a well-known point-like calibration source in combination with measurements of the gamma-ray intensity from the nuclear fuel and Monte Carlo calculations based on the nominal measurement geometry, the activity content can be determined without prior knowledge of the intrinsic detection efficiency of the gamma-ray detector. The presented method is tested using measurements of the 137Cs intensity from spent nuclear fuel of the pressurized water type at the central interim storage in Sweden. Using an assumption of homogeneous distribution of 137Cs throughout the fuel, we demonstrate a linear relationship between measured activity and the activity calculated by a state-of-the-art simulation code. For future studies, we suggest some factors that potentially can decrease the uncertainty in the correlation between measured and calculated activity. |
| Databáze: | OpenAIRE |
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