Development of Security and Safety Fuel for Pu-Burner HTGR: Part 4 — Study on 3S-TRISO Fuel Fabrication

Abstract

In order to develop 3S-TRISO fuel for Pu-burner High Temperature Gas Reactor (HTGR), we conducted lab. scale experiments such as preparation test of simulated fuel kernel; CeO2-YSZ particle, and coating pre-test with simulated kernel. In the preparation test, based on the actual achievement of manufacturing fuel for High Temperature Engineering Test Reactor (HTTR)[1], we tried to fabricate some CeO2-YSZ particles through external gelation process. As a result, we successfully obtained the manufacturing parameters that can prepare good particles. In addition, we carried out some parametric coating test with fluidized-bed equipment and ZrO2 particle as simulated ZrC coated fuel kernel, and obtained the prospect of the possibility to coat the layer having desired thickness.

Development of security and safety fuel for Pu-burner HTGR - Test and characterization for ZrC coating -

“… Preliminary fluidizing test with smaller YSZ dummy kernel with 0.4 mm in diameter is conducted to optimize fluidizing condition.  ZrC coating test on cerium dioxide (CeO 2)-YSZ kernel surrogating PuO2-YSZ with 0.4mm of diameter (Saiki, et al, 2017) is conducted with the optimized gas flow rate. This paper describes interim results in JFY 2016 on coating test and characterization of ZrC coating on YSZ dummy kernel for 3S-TRISO fuel for Pu-burner HTGR.…”