11. One main advantage of this design is that the moving structure does not include the radiation shielding mass. 12. This is contained in a spherical acrylic tank surrounded by 255 photomultiplier tubes and many layers of radiation shielding . 13. Studies of space radiation shielding should include tissue or water equivalent shielding along with the shielding material under study. 14. Even near ground zero, basement sheltering or buildings with similar radiation shielding characteristics would drastically reduce the radiation dose. 15. The compactness of the cyclotron reduces other costs as well, such as foundations, radiation shielding , and the enclosing building. 16. :Almost all the sci fi spaceships don't have anywhere near the radiation shielding required for 180 + day missions. 17. Unlike most subsequent nuclear reactors, it had no radiation shielding or cooling system as it only operated at very low power. 18. The overburden and structure provide substantial radiation shielding , and the negative pressure is usually only 1 / 3 of the overpressure. 19. Gamma radiation requires an appreciable amount of heavy metal radiation shielding ( usually lead or barium-based ) to reduce its intensity. 20. A conservative configuration weighing 2, 000 metric tons, 2 meters of cryogenic radiation shielding , and 5 Tesla magnets was also presented.
