When I started this thread back in 2014 the price of oil had been relatively high and relatively stable for several years and there were people planning to build a prototype 'energy amplifier' accelerator driven fission reactor. My thought was the research from building that system would be mostly applicable to the Proton-Lead reactor and would tell us if the system would be net energy positive instead of consuming more power than it produces.
Unfortunately 11 months after that initial post the price of oil dropped 25 percent and the oil service company that was planning to build the prototype in Norway scrapped the entire plan as part of their belt tightening. In the last three years they have divested themselves of everything but direct servicing of oil platforms which is their core business to survive the price downturn of the last 18 months. As a result they still own the patent for the 'energy amplifier' which they purchased almost a decade ago but they are no longer pursuing it and nobody else can without violating the patent, or buying it from them.
China continues to invest a lot in nuclear testing and development so there is still the possibility that they will seek to develop the technology, but for now nothing is being published that indicates anyone is developing the Proton-Lead technology or the Energy Amplifier technology.