This has been done before
How can one get excited about this? Since the late 1950s, the US and other countries have been deploying small reactors to military submarines. Here are some specs on the first nuclear submarine, the USS Nautilus (SSN-571):
"Size: The reactor core itself was relatively compact, designed to fit within the submarine’s pressure hull, which had a diameter of about 28 feet. The entire reactor compartment, including shielding and associated systems, occupied a cylindrical section roughly 30–40 feet long and about 20–25 feet in diameter (estimated based on submarine design constraints)."
Sounds like the size of a Shipping container to me.
"Nautilus was powered by the Submarine Thermal Reactor (STR), later designated the S2W reactor, a pressurized water reactor produced for the US Navy by Westinghouse Electric Corporation".
Westinghouse reactor again. Did that company dust off the old reactor schematic?
Uncanny
*Note* I didn't read the entire article, but... just saying.