TRITIUM ENVIRONMENTAL SOURCE TERMS FOR THE EFFLUENTS OF ITER WATER-SYSTEMS

An analysis of the heat transport and water detritiation systems of IT ER has been performed in order to determine major pathways for tritium loss and estimate releases during normal operation (operational triti um release). Heavy water escape and tritium release estimates compiled on the basis of operating experiences of typical CANDU PWR and the Da rlington Tritium Removal Facility (DTRF) have been appropriately scale d on the basis of water and tritium inventories and tritium concentrat ions to fit ITER design and operating conditions. The paper estimates the chronic and acute tritium releases to the environment in elemental and oxide forms, via waterborne and airborne pathways of the ITER wat er systems. The results of the analysis will be used to demonstrate th at the ITER design will meet the dose limits for occupational and acci dental tritium releases.