Tritium Inventory Evaluation Program for the Tritium Laboratory Karlsruhe (TLK)

Improvement of tritium accountancy technology for ITER fuel cycle safety enhancement

“…The tritium inventory is evaluated by the temperature difference at a steady state between inlet and outlet of the circulated He gas. Comparing volumetric method (Pressure, Volume, Temperature and Concentration) commonly used for tritium accountancy of the storage beds at tritium facilities in the world [7][8][9][10], this tritium accountancy method has advantages in the following points; 1) simple operation without requirement to move tritium from the system, 2) measurement of the whole amount of tritium stored in the bed at once and 3) continuous removal of tritium decay heat to avoid overheating the ZrCo that results in increase the gas pressure inside. It has been demonstrated using the scaled ZrCo bed that measurement within an accuracy of ±1 gram against 100 grams tritium storage for an ITER design requirement could be carried out with this method [4,5].…”

“…The tritium inventory is evaluated by the temperature difference at a steady state between the inlet and the outlet of the circulated helium gas. Comparing the volumetric methods (pressure, volume, temperature and concentration) commonly used for tritium accountancy of the storage beds at tritium facilities around the world [8][9][10][11], this tritium accountancy method has advantages in the following points:…”