Did you know that a projectile travelling at 86.6% the speed of light has the same relativistic kinetic energy as its rest mass? This means the projectile contains the same energy as it would if it was made of antimatter!
Since according to the Stephan-Boltzman Law: P = A * ε * σ * T^4 , the effectiveness of a spacecraft's radiator increases with the fourth power of it's temperature. Run those radiators hot!
ALARA or "As Low As Reasonably Achievable" is an important basic guideline for decreasing exposure to ionizing radiation sources. To adhere to this principle when working, one should minimize time spent around the source, maximize the distance allowable, and use proper shielding!
