MONTE CARLO SIMULATION OF SHIELDED FAST NEUTKON SOURCE

The physics process T(d, n)￣4He fast neutron source shielded of with natural iron is simulat-ed by using Monte Carlo method.A NSMCS procedure in Fortran high grade language has beenwritten. NSMCS is divided into four grades according to their functions.Grade two is taken asthe dominant factor,which consists of several subroutines with a single function,and is trans-fered by main and grade one procedures.When the procedure was up to standard,the variousproperties of different thicknesses of iron shielding the fast neutron source were computed.Theresults obtained are not only satisfactory,But also in agreement with foreign data adopted.