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Recent Progress in the Design of a Tomographic Device for Measurements of the Three-Dimensional Pin-Power Distribution in Irradiated Nuclear Fuel Assemblies
Vattenfall Power Consultant AB, Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Nuclear fuel diagnostics and safeguards)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Nuclear fuel diagnostics and safeguards)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Nuclear fuel diagnostics and safeguards)
2010 (English)In: Nuclear science and engineering, ISSN 0029-5639, E-ISSN 1943-748X, Vol. 165, no 2, 232-239 p.Article in journal (Refereed) Published
Abstract [en]

A tomographic technique for determination of the thermal power distribution in nuclear fuel assemblies is under development. The purpose is to provide an experimental validation tool for core simulation codes. Such codes are essential for the operation of nuclear power reactors, and validation is important in the process of improving and developing the codes as well as the fuel.

The tomographic method is nonintrusive and offers large amounts of data within a normal revision shutdown. In earlier experimental investigations using a test platform, the method proved useful, demonstrating results of satisfying quality. However, the measuring setup also revealed nonfeasible properties related to transport, decontamination, and background radiation shielding.

In this paper, the design of a new measuring device is presented. It is based on experiences from the test platform, but its size and weight make it advantageous regarding transports and decontamination. Moreover, the design inherently allows for more efficient background shielding.

The latter has been investigated in a detailed study using the MCNP simulation code. The results confirm the high levels of background radiation observed in the test platform. It is also concluded that the shielding properties in the new design are sufficient.

Place, publisher, year, edition, pages
2010. Vol. 165, no 2, 232-239 p.
Keyword [en]
tomography, nuclear fuel, pin power
National Category
Subatomic Physics
Research subject
Physics with specialization in Applied Nuclear Physics; Applied Nuclear Physics
Identifiers
URN: urn:nbn:se:uu:diva-146740ISI: 000278139500008OAI: oai:DiVA.org:uu-146740DiVA: diva2:398868
Available from: 2011-02-20 Created: 2011-02-20 Last updated: 2017-12-11Bibliographically approved

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http://www.new.ans.org/pubs/journals/nse/a_10321

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Jacobsson Svärd, Staffan

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