Recycling radioactive liquid wastes at light-water cooled nuclear power reactors is becoming a popular method of limiting release levels to as low as practicable. As a result of recycling the liquid wastes the tritium in the liquid waste streams is not removed. Combined with its relatively long half life (12.33 years), recycling results in a buildup of large volumes of tritium contaminated liquids. To evaluate the magnitude of the potential tritium handling problem and to develop recommendations for solutions, a computerized model of tritium buildup in a PWR was developed. The results from this model will be used to assess the potential environmental impact of tritium recycle for the entire nuclear power reactor industry and will be instrumental in developing standards or guidance concerning tritium recycle.