ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,209, issued on April 21, was assigned to TERRAPOWER LLC (Bellevue, Wash.).
"Nuclear fuel assembly with multi-pitch wire wrap" was invented by Brian C Johnson (Issaquah, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "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 pr...