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Pulsed neutron source reference measurements in the subcritical experiment YALINA-Booster
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.
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2009 (English)In: Proceedings of International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators: 4-8 May 2009, Vienna, International Atomic Energy Agency, 2009Conference paper (Refereed)
Abstract [en]

In support of an online reactivity monitoring experiment, also presented in this conference, this work presents the reactivity calibration measurements performed with a pulsed neutron source in the coupled fast-thermal subcritical facility YALINA-Booster. These experiments reveal the complexity of experimentally obtaining a global reactivity from a highly heterogeneous core. Moreover, the effect of varying the source multiplication at constant reactivity on the area ratio technique is explored. It is found that the reactivity obtained with the area ratio technique carry strong spatial dependence, but it can be handled by calculated correction factors. On the other hand the method is showed not to be sensitive to changes in the source multiplication. It is also shown that the prompt neutron decay constant does not vary strongly over the core except at deep subcritical states.

Place, publisher, year, edition, pages
International Atomic Energy Agency, 2009.
, Proceedings series (International Atomic Energy Agency), ISSN 0074-1884 ; 173
Keyword [en]
Area ratios, Calibration measurements, Correction factors, Heterogeneous cores, Prompt neutron decay constant, Pulsed neutron sources, Reactivity monitoring, Source multiplication, Spatial dependence, Subcritical experiments, Subcritical state, Neutron emission, Neutron sources, Nuclear engineering, Reactivity (nuclear), Experiments
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-152424ScopusID: 2-s2.0-79952788836ISBN: 978-920150410-4OAI: diva2:753993
IAEA International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators, 4 May 2009 through 8 May 2009, Vienna, Austria

QC 20141009

Available from: 2014-10-09 Created: 2014-09-26 Last updated: 2014-10-09Bibliographically approved

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