7. UNUSUAL FEATURES OF THE PROGRAM
TRITON is not restricted to a fixed chain of burnable isotopes, but may treat any isotopic chain specified in input (with some minor restrictions). However, a standard chain is incorporated in the program and contains - 6 fuel isotopes (U-235, U-236, Pu-239, Pu-240, Pu-241), 2 pairs of single fission products (Pr-149, Sm-149, I-135, Xe-135), a lumped fission product, boron, a burnable poison. Automatic fuel shuffling is allowed.
The selfshielding factors are automatically calculated at each time step by means of given rules.