Terrapower, LLC

Bao H Truong

Robert C Petroski

Jesse R Cheatham, Iii

Pavel Hejzlar

Christopher J Johns

Brian C Johnson

Joshua C Walter

Jon David McWhirter

John Rogers Gilleland

Nicholas W Touran

Kevan D Weaver

Robert Alan Corbin

Mark R Werner

James M Vollmer

Philip M Schloss

Michael E Cohen

Jay R Tandy

K Michael Steer

Yu-Chih Ko

Michael E Garrett

Jesse R Iii Cheatham

A duct for a nuclear fuel assembly includes a tubular body and an elongated member. The tubular body has a sidewall with an inner face and an outer face and is configured to contain nuclear fuel within a fuel region. The elongated member extends from the outer face along at least a portion of the fuel region and has a contact surface configured to stabilize the duct during operation of the nuclear fuel assembly.

Nuclear fuel assembly design

In response to a change in a thermal operational parameter in a nuclear fission reactor, reactivity is controlled by driving a neutron absorption parameter modifying material to or from a region of the core of the nuclear fission reactor. The apparatus includes a driver material disposed in a first reservoir portion and a second reservoir portion of a first reservoir and connected by a first conduit. A high-Z material may be distributed in the driver material. The neutron absorption parameter modifying material is disposed in both a second reservoir and the second reservoir portion of the first reservoir. A portion of the neutron absorption parameter modifying material is in physical contact with a portion of the driver material in the second reservoir portion. The neutron absorption parameter modifying material is driveable by the driver material between the second reservoir portion and the second reservoir through a second conduit.

Passive reactivity control apparatus

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Bellevue, WA, United States of America

Bao H Truong