Journal article Open Access

# Analysis of the neutron noise induced by fuel assembly vibrations

Andrea Zoia; Amélie Rouchon; Baptiste Gasse; Christophe Demazière; Paolo Vinai

### DataCite XML Export

<?xml version='1.0' encoding='utf-8'?>
<identifier identifierType="URL">https://zenodo.org/record/4545311</identifier>
<creators>
<creator>
<creatorName>Andrea Zoia</creatorName>
<affiliation>Université Paris-Saclay, CEA</affiliation>
</creator>
<creator>
<creatorName>Amélie Rouchon</creatorName>
<affiliation>Université Paris-Saclay, CEA</affiliation>
</creator>
<creator>
<creatorName>Baptiste Gasse</creatorName>
<affiliation>Université Paris-Saclay, CEA</affiliation>
</creator>
<creator>
<creatorName>Christophe Demazière</creatorName>
<affiliation>Chalmers University of Technology</affiliation>
</creator>
<creator>
<creatorName>Paolo Vinai</creatorName>
<affiliation>Chalmers University of Technology</affiliation>
</creator>
</creators>
<titles>
<title>Analysis of the neutron noise induced by fuel assembly vibrations</title>
</titles>
<publisher>Zenodo</publisher>
<publicationYear>2021</publicationYear>
<subjects>
<subject>Neutron noise</subject>
<subject>Frequency domain</subject>
<subject>Linearized equations</subject>
<subject>Non-pertubative approach</subject>
<subject>Harmonics</subject>
</subjects>
<dates>
<date dateType="Issued">2021-02-17</date>
</dates>
<language>en</language>
<resourceType resourceTypeGeneral="Text">Journal article</resourceType>
<alternateIdentifiers>
<alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/4545311</alternateIdentifier>
</alternateIdentifiers>
<relatedIdentifiers>
<relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.anucene.2020.108061</relatedIdentifier>
</relatedIdentifiers>
<rightsList>
<rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
</rightsList>
<descriptions>
<description descriptionType="Abstract">&lt;p&gt;The investigation of neutron noise is key to several applications in nuclear reactor&lt;br&gt;
physics, such as the detection of control rod or assembly vibrations and&lt;br&gt;
the diagnostic of coolant speed and void fraction. In this paper we will elucidate&lt;br&gt;
some aspects of the noise equations in the Fourier domain, for the case of&lt;br&gt;
periodic fuel rod vibrations with frequency &amp;omega;&lt;sub&gt;0&lt;/sub&gt; in a small symmetrical system&lt;br&gt;
in which the perturbation is centrally located. We will in particular focus on&lt;br&gt;
the double frequency effect, i.e., the emergence of a noise component at 2&amp;omega;&lt;sub&gt;0&lt;/sub&gt;&lt;br&gt;
(possibly stronger than the one at the fundamental frequency &amp;omega;&lt;sub&gt;0&lt;/sub&gt;). Our analysis&lt;br&gt;
will be carried out without truncating the noise source at the first order and in&lt;br&gt;
the context of a non-perturbative approach (i.e., without resorting to linearization).&lt;br&gt;
For this purpose, we will select a simple benchmark configuration that&lt;br&gt;
is amenable to accurate reference solutions obtained by solving the exact timedependent&lt;br&gt;
transport equations. The analysis carried out in this work suggests&lt;br&gt;
that the non-perturbative noise equations are mandatory in order to properly discriminate&lt;br&gt;
the possible emergence of double frequency effects in neutron noise,&lt;br&gt;
especially in view of comparing simulation results to experimental data&lt;/p&gt;</description>
</descriptions>
<fundingReferences>
<fundingReference>
<funderName>European Commission</funderName>
<funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
<awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/754316/">754316</awardNumber>
<awardTitle>Core monitoring techniques and experimental validation and demonstration</awardTitle>
</fundingReference>
</fundingReferences>
</resource>

13
22
views