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Alternative measuring approaches in gamma scanning on spent nuclear fuel
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2007 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In the future, the demand for energy is predicted to grow and more countries plan to utilize nuclear energy as their source of electric energy. This gives rise to many important issues connected to nuclear energy, such as finding methods that can verify that the spent nuclear fuel has been handled safely and used in ordinary power producing cycles as stated by the operators. Gamma ray spectroscopy is one method used for identification and verification of spent nuclear fuel. In the specific gamma ray spectroscopy method called gamma scanning the gamma radiation from the fission products Cs-137, Cs-134 and Eu-154 are measured in a spent fuel assembly. From the results, conclusions can be drawn about the fuels characteristics.

This degree project examines the possibilities of using alternative measuring approaches when using the gamma scanning method. The focus is on examining how to increase the quality of the measured data. How to decrease the measuring time as compared with the present measuring strategy, has also been investigated. The main part of the study comprises computer simulations of gamma scanning measurements. The simulations have been validated with actual measurements on spent nuclear fuel at the central interim storage, Clab.

The results show that concerning the quality of the measuring data the conventional strategy is preferable, but with other starting positions and with a more optimized equipment. When focusing on the time aspect, the helical measuring strategy can be an option, but this needs further investigation.

Place, publisher, year, edition, pages
2007. , 40 p.
UPTEC ES, ISSN 1650-8300 ; 07011
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-162795OAI: diva2:461671
Educational program
Master Programme in Energy Systems Engineering
Available from: 2011-12-05 Created: 2011-12-05 Last updated: 2011-12-05Bibliographically approved

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