Coated Fuel Particles: Requirements and Status of Fabrication Technology

Thermal conductivity mapping of pyrolytic carbon and silicon carbide coatings on simulated fuel particles by time-domain thermoreflectance

“…For the triple layer coatings an average value of 5.7 W/m K and 13.5 W/m K were determined for the buffer PyC layer and inner PyC (IPyC) layers respectively, while the densities of the buffer and IPyC are 1.35 and 2 g/cm 3 , respectively. It is important to mention that the deposition conditions used for the formation of the buffer layer were not the optimum conditions to obtain the standard density required for this layer of around 1 g/cm 3 [30]. For this reason the value of thermal conductivity quoted here should be higher than the value obtained for the PyC buffer layer in typical TRISO particles.…”

Sorption of Strontium by Graphitic Materials

“…The fuel elements (manufacturer: HOBEG, Hanau, Federal Republic of Germany) are made of matrix graphite, grade A 3 (see Ref. [2]), in which the UO, fuel is embedded as coated particles [3]. Delle et al.…”

Effect of Deposition Parameters on the Properties of Pyrolytic Carbon Deposited by Fluidized-Bed Chemical Vapor Deposition

“…1) TRISO형 피복입자 핵 연료는 직경이 약 500 µm인 구형의 UO 2 입자에 저밀 도 열분해 탄소층(buffer PyC), 내부 고밀도 열분해 탄 소층(inner PyC), 탄화규소층(SiC), 외부 고밀도 열분해 탄소층(outer PyC)의 4개의 층이 피복된 다층구조로 각 피복층은 중성자 조사에 의한 부피변화와 조사손상을 최 소화하기 위해 등방성 구조를 가져야 한다. 2,3) Fig…”