Liquid Fueled NTRs: An Introduction

Hello, and welcome back to Beyond NERVA! Today we continue our look into advanced NTR fuel types, by diving into an extended look at one of the least covered design types in this field: the liquid fueled NTR (LNTR). This is a complex field, with many challenges unique to the phase state of the fuel, […]

Topaz International part II: The Transition to Collaboration

Hello, and welcome back to Beyond NERVA! Before we begin, I would like to announce that our Patreon page, at, is live! This blog consumes a considerable amount of my time, and being able to pay my bills is of critical importance to me. If you are able to support me, please consider doing […]

Topaz International part 1: ENISY, the Soviet Years

Hello, and welcome back to Beyond NERVA! Today, we’re going to return to our discussion of fission power plants, and look at a program that was unique in the history of astronuclear engineering: a Soviet-designed and -built reactor design that was purchased and mostly flight-qualified by the US for an American lunar base. This was […]

SNAP-50: The Last of the SNAP Reactors

Hello, and welcome to Beyond NERVA, for our first blog post of the year! Today, we reach the end of the reactor portion of the SNAP program. A combination of the holidays and personal circumstances prevented me from finishing this post as early as I would have liked to, but it’s finally here! Check the […]

US Astro-nuclear History part 2: SNAP-8, NASA’s Space Station Power Supply

Hello, and welcome back to Beyond NERVA! As some of you may have noticed, the website has moved! Yes, we’re now at! I’m working on updating the webpage, and am getting the pieces together for a major website redesign (still a ways off, but lots of the pieces are starting to fall into place) […]

History of US Astronuclear Reactors part 1: SNAP-2 and 10A

Hello, and welcome to Beyond NERVA! Today we’re going to look at the program that birthed the first astronuclear reactor to go into orbit, although the extent of the program far exceeds the flight record of a single launch. Before we get into that, I have a minor administrative announcement that will develop into major […]

Nuclear Electric Propulsion History Part 1: The Soviet Astronuclear Program

Hello, and welcome back to Beyond NERVA, where we’re getting back into issues directly related to nuclear power in space, rather than how that power is used (as we’ve examined in our last three blog posts on electric propulsion)! However, the new Electric Propulsion page is up on the website, including a summary of all […]