I do not know the answer with certainty, but it's my very strong impression that rreppy is right, which if true, would seem to make logic.exe's optimism unwaranted. By the very nature of matter and radiation, effective shielding necessarily requires shielding containing significant amounts of mass, usually lead. The stronger the radiation, the greater the need for large amounts of shieding. The only way to provide effective shielding is to place lead or other massive shielding between the radiation source and whatever is to be protected.

Radiation in the solar system is mostly in the form of energetic particles from the sun and in planetary radiation belts. Extrasolar sources may also be dangerous.

In spacecraft, mass needs to be kept to a minimu to conserve fuel requirements, so it's not practical to provide heavy shielding against intense radiation now, and I'm not aware that the situation shows much promise of improving in the foreseeable future.