I have been wondering just how hot can LENR be? If you use something like a diamond anvil lithium can become a superconductor a dielectric and an insulator and hydrogen turns into a metal. So increasing pressure you can increase the tempature, yes? What about the other extrem, high pressure gaseous reactors, Widom Larsen talk about LENR in
Solar flux tubes, solar flares and CME, all under high magnetic fields. I remember in high school a book about gaseous nuclear fission reactor rockets that had such a high impulse that it could send a manned mission to Pluto in just a few short weeks! Just how quickly can yo reach Mars if you have a constant 1g thrust accelerating and deaccelerating from earth to mars!
Some have tried LENR experiments in hugre pressure and it does not improve the reaction...
about space application, the Nuclear Thermal Reactor design of rocket seems a good application with LENR