Nur Krisna, D. and Su’ud, Z. 2012. Study Neutronic of Small Pb-Bi Cooled Non-Refuelling Nuclear Power Plant Reactor (SPINNOR) with Hexagonal Geometry Calculation. Indonesian Journal of Physics. 23, 1 (Jul. 2012), 16 - 22. DOI:https://doi.org/10.5614/itb.ijp.2012.23.1.4.