No quelling required, for there are NO spent fuel rods.
TerraPower uses a small amount of enriched uranium at the beginning of the process (see slides at the bottom of the post), but then the nuclear reactor runs on the waste product and can make and consume its own fuel. The benefits are that the reactor doesn’t have to be refueled or have its waste removed until the end of life of the reactor (theoretically a couple hundred years). Using waste uranium reduces the amount of waste in the overall nuclear life cycle, and extends the available supply of the world’s uranium for nuclear by many times.
https://gigaom.com/2010/02/15/terrapower-how-the-travelling-wave-nuclear-reactor-works/
Computer simulations stated this MIGHT be operational in 10 years in 2010.....real world application has not been achieved has it?