Design and calculation for the main shielding layer of researching reactor

To satisfy the national safety criteria of the radiation shielding when the reactor is in operation, We must complete the design of shielding for the main body of reactor. This paper introduces the design and computing methods of the shielding for the main body of reactor, using the researching reactor as an example, and gives the results of the computing for the radiation shielding. The results show that it can satisfy the safety criteria of radiation to use water and heavy concrete as biological layer for radiation, so the design of the main layer for radiation shielding is reliable.