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23 lines
1.1 KiB
TeX
23 lines
1.1 KiB
TeX
\section*{Problem 6}
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\subsection*{Part A}
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Withdrawing the control rods will move power production towards the upper half
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of the core. Changing boron concentration will affect all parts of the core the
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same amount, while increasing to full power does not provide enough information
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to describe what's happening in the core. That can be accomplished through rod
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position or through boron concentration.
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Assume rods remove through the top of the core (basically all PWRs), moving the
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rods out will allow more flux higher in the core and thus move the average
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production upwards.
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\subsection*{Part B}
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This happens because the moderator is the coolant, and the
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coolant is colder as it enters the core at the bottom of the core. A low
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enrichment core using boron does not have as pronounced of an effect because at
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the same time because the boron is a poison. As boron enters the core, it is
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more effective compared to as it travels through the core and is 'used up'. This
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is the opposite effect of the moderator temperature, and as such they balance
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each other out to a degree.
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