The role of Japan's industry in the HTTR design and its construction

Evaluation of the Start-Up Core Physics Tests at Japan's High Temperature Engineering Test Reactor (Fully-Loaded Core)

“…Because insufficient data is available for the final composition and density of the graphite overcoat, this layer is being treated with equal properties to that of the surrounding compact graphite matrix (Table 1. 14). Therefore modification of the overcoat diameter would not generate an effective uncertainty in k eff beyond statistical uncertainty.…”

“…For the effective change in height, the fuel stack height was adjusted by ±7.0 mm and the effect from a height change in a single fuel compact was then determined by dividing by 14 for the number of compacts in a fuel rod. The nominal values for the inner diameter, outer diameter, and height of the fuel compacts are 10.0, 26.0, and 39.0 mm, respectively (Table 1. 14). Results are shown in Table 2.8.…”

“…% from the nominal value of 30 % ( Table 1. 14) to determine the effective uncertainty in k eff . It is a bounding limit.…”

“…The SiC density was increased by 0.06 g/cm 3 , which is typical for SiC material, from the nominal value of 3.20 g/cm 3 ( Table 1. 14) to determine the effective uncertainty in k eff . This value is three times the bounding limit.…”

Removal of arsenic by a granular Fe–Ce oxide adsorbent: Fabrication conditions and performance

“…These adsorbents, however, suffer from several drawbacks such as low adsorption capacity caused by limited active components, and low stability and durability [29]. Among several particle fabrication technologies reported [30][31][32], the vibration dropping method is considered an effective mechanism as it can fabricate homogeneous smallsized particles from powdered materials without a carrier core and has been successfully applied in the preparation of small-sized fuel particles on a mass production scale [32].…”