In the types dimension of Nuclear Wastewater Treatment, the market is organized around five core technologies: chemical precipitation, ion‑exchange, membrane filtration, advanced oxidation processes (AOPs), and biological treatment. Chemical precipitation, contributing roughly 18 % of revenue, remains the baseline for bulk radionuclide removal due to low‑cost reagents and straightforward operation. Ion‑exchange, the largest share at about 30 %, provides high selectivity for cesium, strontium, and actinides, supporting both reactor‑cooling and storage applications. Membrane filtration—primarily reverse osmosis and nanofiltration—captures approximately 25 % of spend, driven by its ability to achieve ultra‑low contaminant concentrations required for discharge permits. Advanced oxidation processes, accounting for 15 %, are increasingly adopted for refractory organics and mixed‑radionuclide streams, reflecting a shift toward higher treatment efficiencies. Biological treatment, though still niche at 12 %, is gaining traction in low‑level waste scenarios where organic constituents coexist with radionuclides. This taxonomy clarifies how each technology’s performance attributes and cost structures underpin its share of the overall market.