Tritium Accounting Characteristics of “In-Bed” Gas Flowing Calorimetry

In-Bed Accountability Development for a Passively Cooled, Electrically Heated Hydride (PACE) Bed

“…6 The purpose of this work was to perform IBA tests on Gen2 storage beds, using electric heaters to simulate tritium decay, and determine the IBA accuracy for this bed design.…”

“…6 It was anticipated that lower losses of tritium decay heat through the jacket would improve the accuracy and the detection limit of the IBA technique for Gen2 beds.…”

Improvement of tritium accountancy technology for ITER fuel cycle safety enhancement

“…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].…”

“…This system has been developed to establish a safe and simple tritium accounting method for the tritium storage system. 'In-bed' gas flowing calorimetry was applied to a scaled ZrCo bed with 25 g tritium capacity [6,7]. In the principal design of this calorimetric system, helium gas is circulated through a pipe inserted inside the primary vessel containing zirconium cobalt tritide to remove the decay heat of tritium.…”

“…One was to develop a remote and multi-location analysis system of hydrogen isotopes and tritiated molecular impurities in process gases by application of laser Raman spectroscopy [3]. The other was to develop "in-situ" tritium inventory measurement by application of a "self assaying" storage bed [4,5]. Here, the brief specifications and performance of the developed systems are reported.…”