HISI, High-tech Submarine Interior, hisi_reactr, submarine nuclear reactor chamber with centrally positioned cylindrical glass-walled reactor vessel, transparent liquid core emitting intense blue Cherenkov radiation glow, internal moderator structures and vertical luminous rods visible through the fluid, heavy metallic reactor dome and reinforced base housing with radiation hazard marking, dense surrounding network of pipes, valves, cables and control units forming a compact engineering environment, symmetrical layout with strong central focus on reactor, grated industrial flooring and worn metal surfaces, overhead lighting combined with blue core illumination creating high contrast reflections and volumetric glow, cool blue light dominating against darker metallic surroundings, high detail textures, confined high-tech nuclear engineering space