Pump Jet propulsion - that’s what Tom Clancy wrote about in the hunt for red october, isn’t it?
No. I believe they are two totally different concepts. The one in the movie was a large magneto-hydrodynamic pump.
The pump jet technology here is closer to the jet-ski propulsion.
Basically the idea is to have a much smaller propeller surrounded by a radial flow chamber. (I wish I knew what I just said)
Here is an example.