Light-water reactor fuel assembly (alternatives), a light-water reactor, and a fuel element of fuel assembly
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United States of America Patent
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May 31, 2016
Grant Date -
Dec 22, 2011
app pub date -
Dec 25, 2008
filing date -
Dec 25, 2008
priority date (Note) -
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Abstract
A 17×17 jacketless fuel assembly for a PWR-type light-water reactor uses thorium as the fuel. The fuel assembly has a square shape in the plan view, a seed region, a blanket region that encircles it, an upper nozzle, and a lower nozzle. The fuel elements of the seed region re arranged in the rows and columns of a square coordinate grid and have a four-lobed profile that forms spiral spacer ribs along the length of a fuel element. The blanket region contains a frame structure within which a bundle of fuel elements made from thorium with the addition of enriched uranium is positioned. The blanket region fuel elements are arranged in the two or three rows and columns of a square coordinate grid.
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