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model.xml
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model.xml
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<?xml version='1.0' encoding='utf-8'?>
<model>
<materials>
<material depletable="true" id="2" name="fuel" temperature="523.15">
<density units="atom/b-cm" value="0.07021"/>
<nuclide ao="0.0149" name="U235"/>
<nuclide ao="0.0826" name="U238"/>
<nuclide ao="0.00469" name="O16"/>
</material>
<material id="3" name="steel" temperature="523.15">
<density units="atom/b-cm" value="0.0049"/>
<nuclide ao="0.05815775" name="Fe54"/>
<nuclide ao="0.9129523" name="Fe56"/>
<nuclide ao="0.02108405" name="Fe57"/>
<nuclide ao="0.0028059" name="Fe58"/>
<nuclide ao="0.00494461" name="C12"/>
<nuclide ao="5.5389999999999997e-05" name="C13"/>
</material>
<material id="4" name="helium" temperature="523.15">
<density units="sum"/>
<nuclide ao="1.9999999999999998e-17" name="He3"/>
<nuclide ao="9.999979999999999e-12" name="He4"/>
</material>
<material id="5" name="sodium" temperature="523.15">
<density units="sum"/>
<nuclide ao="0.0233" name="Na23"/>
</material>
</materials>
<geometry>
<cell id="12" material="4" region="-13" universe="5"/>
<cell id="13" material="2" region="13 -14" universe="5"/>
<cell id="14" material="4" region="14 -15" universe="5"/>
<cell id="15" material="3" region="15 -16" universe="5"/>
<cell id="16" material="5" region="16" universe="5"/>
<cell id="22" material="5" universe="13"/>
<cell fill="9" id="23" region="-36 37 -38 -39 40 41" universe="14"/>
<cell id="24" material="3" region="~(-36 37 -38 -39 40 41) (-42 43 -44 -45 46 47)" universe="14"/>
<cell id="25" material="5" region="~(-42 43 -44 -45 46 47) (-48 49 -50 -51 52 53)" universe="14"/>
<cell fill="14" id="26" region="55 -54 -48 49 -50 -51 52 53" universe="15"/>
<hex_lattice id="9" n_rings="5">
<pitch>0.695</pitch>
<outer>13</outer>
<center>0.0 0.0</center>
<universes>
5
5 5
5 5 5
5 5 5 5
5 5 5 5 5
5 5 5 5
5 5 5 5 5
5 5 5 5
5 5 5 5 5
5 5 5 5
5 5 5 5 5
5 5 5 5
5 5 5 5 5
5 5 5 5
5 5 5
5 5
5</universes>
</hex_lattice>
<surface coeffs="0.0 0.0 0.0802" id="13" type="z-cylinder"/>
<surface coeffs="0.0 0.0 0.25565" id="14" type="z-cylinder"/>
<surface coeffs="0.0 0.0 0.27112" id="15" type="z-cylinder"/>
<surface coeffs="0.0 0.0 0.30499" id="16" type="z-cylinder"/>
<surface coeffs="2.841720000066609" id="36" type="x-plane"/>
<surface coeffs="-2.841720000066609" id="37" type="x-plane"/>
<surface coeffs="0.5773502691896257 1.0 0.0 3.281335614" id="38" type="plane"/>
<surface coeffs="-0.5773502691896257 1.0 0.0 3.281335614" id="39" type="plane"/>
<surface coeffs="-0.5773502691896257 1.0 0.0 -3.281335614" id="40" type="plane"/>
<surface coeffs="0.5773502691896257 1.0 0.0 -3.281335614" id="41" type="plane"/>
<surface coeffs="2.9622100001797844" id="42" type="x-plane"/>
<surface coeffs="-2.9622100001797844" id="43" type="x-plane"/>
<surface coeffs="0.5773502691896257 1.0 0.0 3.420465482" id="44" type="plane"/>
<surface coeffs="-0.5773502691896257 1.0 0.0 3.420465482" id="45" type="plane"/>
<surface coeffs="-0.5773502691896257 1.0 0.0 -3.420465482" id="46" type="plane"/>
<surface coeffs="0.5773502691896257 1.0 0.0 -3.420465482" id="47" type="plane"/>
<surface boundary="reflective" coeffs="3.062600000138308" id="48" type="x-plane"/>
<surface boundary="reflective" coeffs="-3.062600000138308" id="49" type="x-plane"/>
<surface boundary="reflective" coeffs="0.5773502691896257 1.0 0.0 3.536385869" id="50" type="plane"/>
<surface boundary="reflective" coeffs="-0.5773502691896257 1.0 0.0 3.536385869" id="51" type="plane"/>
<surface boundary="reflective" coeffs="-0.5773502691896257 1.0 0.0 -3.536385869" id="52" type="plane"/>
<surface boundary="reflective" coeffs="0.5773502691896257 1.0 0.0 -3.536385869" id="53" type="plane"/>
<surface boundary="vacuum" coeffs="20.0" id="54" type="z-plane"/>
<surface boundary="vacuum" coeffs="-20.0" id="55" type="z-plane"/>
</geometry>
<settings>
<run_mode>eigenvalue</run_mode>
<particles>1000</particles>
<batches>50</batches>
<inactive>10</inactive>
<source particle="neutron" strength="1.0" type="independent">
<space type="point">
<parameters>0.0 0.1 0.0</parameters>
</space>
</source>
<temperature_method>nearest</temperature_method>
<temperature_tolerance>100.0</temperature_tolerance>
</settings>
<tallies>
<filter id="3" type="material">
<bins>2 3 4 5</bins>
</filter>
<tally id="6">
<filters>3</filters>
<scores>fission absorption scatter</scores>
</tally>
</tallies>
</model>