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27 lines
1.2 KiB
XML
27 lines
1.2 KiB
XML
<?xml version="1.0"?>
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<geometry>
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<!--
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This is a simple pin cell model based on dimensions from the MIT BEAVRS
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(Benchmarking for Evaluation and Validation of Reactor Simulations)
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benchmark.
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-->
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<!-- Surfaces for fuel, gap, cladding. Dimensions from Figure 2 in BEAVRS -->
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<surface id="1" type="z-cylinder" coeffs="0. 0. 0.39218" /> <!-- Fuel OR -->
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<surface id="2" type="z-cylinder" coeffs="0. 0. 0.40005" /> <!-- Clad IR -->
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<surface id="3" type="z-cylinder" coeffs="0. 0. 0.45720" /> <!-- Clad OR -->
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<!-- Reflective surfaces on outside of pin-cell. The lattice pitch is 1.25984
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cm (taken from Table 2 in BEAVRS). -->
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<surface id="4" type="x-plane" coeffs="-0.62992" boundary="reflective" />
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<surface id="5" type="x-plane" coeffs=" 0.62992" boundary="reflective" />
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<surface id="6" type="y-plane" coeffs="-0.62992" boundary="reflective" />
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<surface id="7" type="y-plane" coeffs=" 0.62992" boundary="reflective" />
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<cell id="1" material="1" region=" -1" /> <!-- UO2 Fuel -->
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<cell id="2" material="2" region="1 -2" /> <!-- Helium gap -->
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<cell id="3" material="3" region="2 -3" /> <!-- Zircaloy cladding -->
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<cell id="4" material="4" region="3 4 -5 6 -7" /> <!-- Borated water -->
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</geometry>
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