Conference paper Open Access

A COMPARISON BETWEEN TIME DOMAIN AND FREQUENCY DOMAIN CALCULATIONS OF STATIONARY NEUTRON FLUCTUATIONS

Viebach M., Lange C., Kliem S., Demazière C., Rohde U., Hennig D. and Hurtado A.


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  <identifier identifierType="DOI">10.5281/zenodo.3567604</identifier>
  <creators>
    <creator>
      <creatorName>Viebach M., Lange C., Kliem S., Demazière C., Rohde U., Hennig D. and Hurtado A.</creatorName>
    </creator>
  </creators>
  <titles>
    <title>A COMPARISON BETWEEN TIME DOMAIN AND FREQUENCY DOMAIN CALCULATIONS OF STATIONARY NEUTRON FLUCTUATIONS</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2019</publicationYear>
  <subjects>
    <subject>neutron noise, DYN3D, CORE SIM</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2019-08-25</date>
  </dates>
  <resourceType resourceTypeGeneral="ConferencePaper"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/3567604</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.3567603</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Unexplained neutron flux fluctuation patterns observed in some reactors were recently&lt;br&gt;
investigated by various European institutions. The time-domain code DYN3D is one of&lt;br&gt;
the tools used for simulating these fluctuations. Though, the applicability of time-domain&lt;br&gt;
codes for modelling small stationary fluctuations remains a discussed question.&lt;br&gt;
Aiming at a confirmation that these codes may be applied for neutron noise calculations,&lt;br&gt;
two special cases of neutron flux oscillations have been simulated with DYN3D and with&lt;br&gt;
CORE SIM, the latter one being validated for the context here. The comparison between&lt;br&gt;
the results of these two codes is the subject of this paper.&lt;br&gt;
This study demonstrates that time- and frequency-dependent calculations can give qualitatively&lt;br&gt;
equivalent results but substantial quantitative deviations may occur. Nevertheless,&lt;br&gt;
DYN3D may be considered as qualified for neutron-noise calculations as the deviations&lt;br&gt;
are smaller than 20 %. The optimization of the DYN3D setup is a matter of future research.&lt;/p&gt;</description>
  </descriptions>
  <fundingReferences>
    <fundingReference>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/100010661</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/754316/">754316</awardNumber>
      <awardTitle>Core monitoring techniques and experimental validation and demonstration</awardTitle>
    </fundingReference>
  </fundingReferences>
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