Okay, I've run across a few issues with Interstellar 0.12 with the reactors and the smaller D/T Radial Cryostat. If you attach the D/T radial Cryostat to a reactor, upon launching the rendered scene turns black, and the resources for reactor fuel (UF4, ThF4) show as NaN on the resource panel: https://dl.dropboxusercontent.com/u/23648271/KSP/ReactorBlackScreen.png When you use the large D/T cryostat and a Lithium canister, the Enable Tritium Breeding mode doesn't do anything. I created a minimal install with just Interstellar 0.12, Toolbar, and Alternate Resource Panel. (I also tried with just Interstellar, and the issues were the same) Kerbal Space Program - 0.24.2.559 (WindowsPlayer) OS: Windows 7 Service Pack 1 (6.1.7601) 64bit CPU: Intel® Core i5-3570K CPU @ 3.40GHz (4) RAM: 16329 GPU: NVIDIA GeForce GTX 760 (3072MB) SM: 30 (Direct3D 9.0c [nvd3dum.dll 9.18.13.4052]) RT Formats: ARGB32, Depth, ARGBHalf, RGB565, Default, DefaultHDR, ARGBFloat, RGFloat, RGHalf, RFloat, RHalf, R8 I've created a zip that contains a .log, .craft, and screenshots for a few test cases. Since the game did not crash, just glitch, there are no dumps. Test Case 1: Fission Reactor, Generator, Probe Core, Microwave Transmitter; Works Test Case 2: Same parts as Test 1, plus a Lithium Canister; Works Test Case 3: Same parts as Test 2, plus the small D/T radial cryostat; Shortly after launch the scene turns black Test Case 4: Same parts as Test 2, with the large inline D/T cryostat; No black scene, but Enable Tritium Breeding does not function. https://dl.dropboxusercontent.com/u/23648271/KSP/Reactor_Tests.zip Edit: And after reading some on the forum, looks like I included the wrong log files, here's an output_log of Test Case 3: https://dl.dropboxusercontent.com/u/23648271/KSP/output_log.zip Second Edit: Looks like I've traced the black screen issue to a problem with the .cfg for the radial D/T cryostat. The ModuleElementRadioactiveDecay was using the wrong strings for the resources: MODULE { name = ModuleElementRadioactiveDecay decayConstant = 1.7915586e-9 resourceName = Tritium decayProduct = Helium-3 convFactor = 1 } Should be: MODULE { name = ModuleElementRadioactiveDecay decayConstant = 1.7915586e-9 resourceName = LqdTritium decayProduct = LqdHelium3 convFactor = 1 } Still doesn't fix the Tritium Breeding mode not working.