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Shutdown dose rate benchmark experiment at JET to validate the three-dimensional Advanced-D1S method
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2012 (English)In: Fusion engineering and design, ISSN 0920-3796, Vol. 87, no 7-8, 1095-1100 p.Article in journal (Refereed) Published
Abstract [en]

The paper describes a new benchmark, performed as a preliminary experiment on JET tokamak during the last shutdown. Dose rate has been measured with different dosimeters along the axis of the main horizontal port of Octant 1, from the plasma centre to 1 m outside the port at various times after shutdown. The activation dose from the horizontal neutron camera, moved outside the torus hall during the shutdown, has also been assessed. The measured values have been compared with dose rates calculated using an Advanced-D1S method in which new computation capabilities have been introduced, such as dose rate spatial mesh map and automated time behaviour. Measurements along the axis of the horizontal port are well predicted by the calculation. With few exceptions, the D1S estimation is within the error of the measurements. The activation of the horizontal camera is underestimated by a factor of 2. However, more accurate measurements are needed to reduce the uncertainties. The Advanced-D1S method, the results and implications of the benchmark are presented and discussed.

Place, publisher, year, edition, pages
2012. Vol. 87, no 7-8, 1095-1100 p.
Keyword [en]
Shutdown dose, JET, MCNP, Activation, Direct-1 Step method, Benchmark
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-187113DOI: 10.1016/j.fusengdes.2012.02.081ISI: 000309781500032OAI: oai:DiVA.org:uu-187113DiVA: diva2:573862
10th International Symposium on Fusion Nuclear Technology (ISFNT), SEP 11-16, 2011, Portland, OR
Available from: 2012-12-03 Created: 2012-12-03 Last updated: 2012-12-04Bibliographically approved

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