In-pile test of Li2TiO3 pebble bed with neutron pulse operation

Effects of hydrogen mixture into helium gas on deuterium removal from lithium titanate

“…These results suggest that the water vapor, which would exist in the actual blanket system, could influence the tritium behaviors in the system. The major desorption peaks of HDO appeared at 570-580 K with the samples after the exposure at RT and 373 K. It was presumed that the peak was due to de-trapping from bonds of Li-D and Li-OD [8], and that around 700 K was due to mainly de-trapping from titanium hydride, Ti-D [9]. The desorption around 400 K was owing to desorption from wall of the apparatus (i.e.…”

“…The diameter of the Li 2 TiO 3 pebble was approximately 2 mm. The characteristics of Li 2 TiO 3 pebbles were evaluated by K. Tsuchiya et al [8,9]. After the degassing at 997 K for 1 h in a vacuum, the pebbles were introduced in the main chamber of an electron cyclotron resonance (ECR) ion source (Fig.…”

Deuterium ion irradiation for tritium breeding material and evaluation for tritium inventories in test blanket module and blanket of a demonstration reactor

“…The diameter of tritium breeding material used for the TBM may be several mm [9]. In the present experiment, the pebbles with a diameter of 2 mmφwas employed.…”

“…Totally 18 Li 2 TiO 3 pebbles with diameter of were used for the deuterium ion irradiation. These pebbles were heated at 973 K for an hour in a vacuum chamber to remove impurities, such as hydroxides and carbon oxides [9]. The amount of impurity gases was significantly reduced by this preheating.…”

In situ tritium recovery behavior from Li2TiO3 pebble bed under neutron pulse operation

“…In the present study, Li 2 TiO 3 pebbles of 0.3 and 2 mm in diameter were fabricated, and a binary pebble bed of Li 2 TiO 3 was irradiated in the Japan Materials Testing Reactor (JMTR) [10,11]. And behavior of tritium recovery from the Li 2 TiO 3 pebble bed was studied under neutron pulse operation.…”