In the recent trace tritium experiments at JET, neutron cameras were the only diagnostics which could be used to study adequately the transport of tritium as a function of space and time. Direct confrontation is made between the measured neutron camera data and a forward model of 14MeV and 2.5MeV neutron detectors in order to derive the transport coefficients. The analysis method for tritium transport is presented, including a discussion of the error propagation techniques used in determining transport coefficients.