|SUBJECT:||M.S. Thesis Presentation|
|TIME:||Thursday, July 23, 2015, 3:00 p.m.|
|TITLE:||Reactivity Control of a PWR 19x19 Uranium Silicide Fuel Assembly|
|COMMITTEE:||Dr. Bojan Petrovic, Chair (NRE)
Dr. Weston Stacey (NRE)
Dr. Paolo Ferroni (Westinghouse Nuclear)
The Integral Inherently Safe Light Water Reactor (I2S-LWR) is a novel reactor concept which aims to apply safety-promoting features typical of small modular reactors (SMRs) to a large pressurized water reactor (PWR) of 3000 MWt, thus providing an option for a passively safe reactor to markets which would find greater economic benefit in a large reactor. Pushing the compact core of an integral reactor to 3000 MWt necessitates several design innovations to remain within safety margins while meeting the goal of increased power density. The I2S-LWR fuel assembly takes on a 19x19 lattice with reduced fuel rod dimensions relative to traditional Westinghouse-type 17x17 PWR fuel assemblies. It is anticipated that the I2S-LWR will eventually employ uranium silicide (U3Si2) fuel instead of uranium oxide (UO2) to improve thermal performance. These unique design features are closely tied to the I2S-LWR core neutronics, thereby necessitating a thorough investigation of reactivity control options.