Cost of tritium bred in a critical fission reactor

Elementary equations related to the ''six-factor'' formula for criticality are used to derive an expression for the cost of tritium, bred in a fission reactor, in terms of the cost of fissile material. Reasonable parameters give a value about two-thirds of that usually quoted (80 times the price of fissile) for fusion-fission reactor self-bred tritium. However, the handling costs and hazards associated with large-scale LWR tritium production are not assessed.