Deep Borehole Nuclear Waste Disposal Just Got A Whole Lot More Likely
Deep Isolation is a recent start-up company from Berkeley that seeks to dispose of nuclear waste safely at a much lower cost than existing strategies.

The Deep Isolation strategy begins with a one-mile vertical access drillhole that curves into a two-mile horizontal direction where the waste is stored. The horizontal repository portion has a slight upward tilt that provides additional isolation, and isolating any mechanisms that could move radioactive constituents upward. They would have to move down first, then up, something that cannot occur by natural processes.
DEEP ISOLATION
..."The technology takes advantage of recently developed fracking technologies to place nuclear waste in a series of two-mile-long tunnels, a mile below the Earth’s surface, where they’ll be surrounded by a very tight rock known as shale. This type of shale is so tight that it takes fracking technology to get any oil or gas out of it at all.
As geologists, we know how many millions of years it takes for anything to get up from that depth in the Earth’s crust, especially in tight rock formations like shale. And we have plenty of shale in America (see figure)."...

Shale Provinces in the United States. There is lots of suitable shale in the United States, enough so that almost every state with nuclear waste can have its own disposal site. After Gonzales and Johnson, 1984.
SANDIA
This sounds like a good idea, eliminates transport of nuclear waste, no added NIMBY, a tried and true technology we already use Injection well strategy for toxic and hazardous waste disposal and have for years....
https://www.forbes.com/sites/jamesconca/2019/06/24/deep-borehole-nuclear-waste-disposal-just-got-a-whole-lot-more-likely/#53f7c61f67c8
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