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TOWARDS THE VALIDATION OF NEUTRON NOISE SIMULATORS: QUALIFICATION OF DATA ACQUISITION SYSTEMS

Rais A., Lamirand V., Pakari O., Laureau A., Pohlus J., Pohl C., Hübner S., Hursin M., Demazière C., and Pautz A


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        <foaf:name>Rais A., Lamirand V., Pakari O., Laureau A., Pohlus J., Pohl C., Hübner S., Hursin M., Demazière C., and Pautz A</foaf:name>
        <foaf:givenName>Lamirand V., Pakari O., Laureau A., Pohlus J., Pohl C., Hübner S., Hursin M., Demazière C., and Pautz A</foaf:givenName>
        <foaf:familyName>Rais A.</foaf:familyName>
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    <dct:title>TOWARDS THE VALIDATION OF NEUTRON NOISE SIMULATORS: QUALIFICATION OF DATA ACQUISITION SYSTEMS</dct:title>
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    <dcat:keyword>CORTEX, CROCUS reactor, AKR-2 reactor, neutron noise</dcat:keyword>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2019-08-25</dct:issued>
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    <dct:description>&lt;p&gt;This paper deals with the processes involved in the generation of reliable experimental&lt;br&gt; data for the validation of computer simulations. In the field of neutron noise, the analysis&lt;br&gt; of results is based on spectral features of the detector signals in the frequency domain.&lt;br&gt; Neutron noise simulators also produce estimates that are subjected to studies in the same&lt;br&gt; domain. The validation process of such simulations begins with the generation of reliable&lt;br&gt; experimental data. In this work, we analyze results from two neutron noise experimental&lt;br&gt; campaigns. The focus is placed upon de comparison of results obtained by different data&lt;br&gt; acquisition systems (DAQs) that were used to record the data in parallel. The goal is to&lt;br&gt; verify whether results obtained by the different DAQs are consistent, and thus reliable.&lt;br&gt; The neutron noise-dedicated experiments were carried out in the AKR-2 reactor at the&lt;br&gt; Technische Universit&amp;auml;t Dresden and in the CROCUS reactor at the &amp;Eacute;cole polytechnique&lt;br&gt; f&amp;eacute;d&amp;eacute;rale de Lausanne. The experiments consisted in introducing different types of periodic&lt;br&gt; reactivity perturbations: a rotating neutron absorber with a varying absorption crosssection&lt;br&gt; with respect to the rotation angle; a linearly vibrating absorber that is moved back&lt;br&gt; and forth inside the reactor core; and a fuel rods oscillator that allows to vibrate a set of&lt;br&gt; fuel rods.&lt;/p&gt;</dct:description>
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