Everything has a price, and the price of powerful rockets with nuclear propulsion is of course the dread horror of deadly atomic radiation, and the danger can be brought under control with appropriate counter-measures. By treating the power plant with the respect it deserves, the same measures will come in handy if your ship is an interplanetary warship that may be facing hostile nuclear warheads.
The ionizing radiation in space is comprised of charged particles, uncharged particles, and high-energy electromagnetic radiation. The particles vary in size from electrons (beta rays) through protons (hydrogen nuclei) and helium atoms (alpha particles) to the heavier nuclei encountered in cosmic rays, e.g., HZE particles (High Z and Energy, where Z is the charge). They may have single charges, either positive (protons, p) or negative (electrons, e), multiple charges (alpha or HZE particles); or no charge, such as neutrons. The atomic nuclei of cosmic rays, HZE particles, are usually completely stripped of electrons and thus have a positive charge equal to their atomic number.
As for this terrible radiation, export discover that tungsten alloy could be the most suitable material for radiation protection. The higher density of tungsten alloy, the denser of itself would be. Especially for the outstanding machinability of tungsten alloy, it should be machined into different shape as per the required drawing.
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