NUCLEAR FUEL ASSEMBLY WITH MULTI-PITCH WIRE WRAP
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United States of America Patent
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Issued Date -
Oct 12, 2023
app pub date -
May 31, 2023
filing date -
Aug 17, 2020
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Abstract
A nuclear fuel assembly is constructed with fuel assembly components that are wire wrapped and positioned in hexagonal rings within a fuel assembly duct. The fuel assembly components positioned in an outermost ring of the fuel assembly are wire wrapped with a pitch that is shorter than fuel assembly components positioned at an interior ring of the fuel assembly. The shorter pitch at the outer ring of the fuel assembly increases pressure drop of a coolant fluid at the edge and corner subchannels and thereby reduces the temperature gradient across the fuel assembly, which provides a higher output temperature of the nuclear reactor without substantially increasing peak temperature of the fuel cladding.
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