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<p>Dear colleagues,<br>
<br>
we hope to "see" you at the KFN Neutron Webinar by Christian
Reiter:<br>
<br>
Friday, 23 May 2025, 11:00 - 12:00 CET<br>
</p>
<h2><b>An LEU Core Design for FRM II Conversion - A Reactor Physics
Overview</b></h2>
<h3>
Dr. Christian Reiter</h3>
<p>
Head of Reactor Physics, FRM II, TUM<br>
Instrumentation Prize for Neutron Research awardee 2024<br>
<br>
Zoom link: <a rel="noreferrer" target="_blank"
href="https://fz-juelich-de.zoom.us/j/64141367598?pwd=E9Pr5XOLtFqIlyBkdNb9KbaDdoTEuZ.1"
class="moz-txt-link-freetext">https://fz-juelich-de.zoom.us/j/64141367598?pwd=E9Pr5XOLtFqIlyBkdNb9KbaDdoTEuZ.1</a><br>
Meeting-ID: 641 4136 7598<br>
Passcode: 365979<br>
<br>
The conversion of the FRM II from highly enriched uranium (HEU) to
low enriched uranium (LEU) presents unique reactor physics
challenges. This presentation will provide an overview of the
reactor physics considerations in the design of an LEU core,
focusing on key parameters that influence its neutronic and
thermal-hydraulic behavior. The change in moderation ratio due to
the modified fuel and fuel element geometry will be discussed,
highlighting its effects on the neutron flux distribution and the
reactor performance. In addition, the influence of secondary
sources on the fuel element will be examined, particularly in the
context of the scientific performance of the instruments. A
crucial aspect of the conversion is the use of monolithic
Uranium-Molybdenum, a novel high-density LEU fuel, which requires
thorough characterization to provide accurate input data for
reactor simulations. The presentation will highlight the
importance of experimental validation and fuel qualification to
ensure the safe operation of the converted reactor without losing
scientific performance.<br>
<br>
The lecture will be recorded, and there is information on data
protection at<br>
<a rel="noreferrer" target="_blank"
href="https://www.sni-portal.de/en/files/kfn-neutron-webinar-data-protection"
class="moz-txt-link-freetext">https://www.sni-portal.de/en/files/kfn-neutron-webinar-data-protection</a><br>
<br>
On the website<br>
<a rel="noreferrer" target="_blank"
href="https://www.sni-portal.de/en/user-committees/committee-research-with-neutrons/neutron-webinar"
class="moz-txt-link-freetext">https://www.sni-portal.de/en/user-committees/committee-research-with-neutrons/neutron-webinar</a><br>
you will find announcements of upcoming lectures and the link for
the webinar mailing list.<br>
<br>
The following webinar will be on 27 June by Paul Zakalek on "High
Current Accelerator-driven Neutron Sources - The HBS project for a
next generation neutron facility".<br>
<br>
Kind regards,<br>
Frank Schreiber (KFN chair)<br>
Thomas Gutberlet (Webinar organization)</p>
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