http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kizub P.A.,Blokhin A.I.,Blokhin P.A.,Mitenkova E.F.,Mosunova N.A.,Kovrov V.A.,Shishkin A.V.,Zaikov Yu.P.,Rakhmanova O.R. 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.3
A preliminary criticality analysis for novel pyrochemical apparatuses for the reprocessing of mixed uranium-plutonium nitride spent nuclear fuel from the BREST-OD-300 reactor was performed. Hightemperature processing apparatuses, “metallization” electrolyzer, refinery remelting apparatus, refining electrolyzer, and “soft” chlorination apparatus are considered in this work. Computational models of apparatuses for two neutron radiation transport codes (MCU-FR and MCNP) were developed and calculations for criticality were completed using the Monte Carlo method. The criticality analysis was performed for different loads of fissile material into the apparatuses including overloading conditions. Various emergency situations were considered, in particular, those associated with water ingress into the chamber of the refinery remelting apparatus. It was revealed that for all the considered computational models nuclear safety rules are satisfied.
Shishkin R. A.,Yuferov Y. V.,Karagergi R. P.,Schak A. V. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.1
The microstructural and mechanical properties of pressuless sintered SiC-based composite materials with Al or Cu addition (0–10 wt.%) were studied. The introduction of 1–2 wt.% of metals to the SiC results in appreciable porosity decreases from 31 to 19 ± 1%. Moreover, metallic aids considerably affects the phase composition of the materials. Cu suppresses the formation of mullite. In contrast, Al increases the content of the moissanite phase in the final material because of a thick oxide film on the surface of silicon carbide. However, metal content does not steadily increases due to the melt removes from the open pores during the sintering process. The hardness of the composite material mainly depends on the moissanite phase content, which could be enhanced by metal additives. Developed composite materials have up to 50 and 3 times greater resistance to abrasive and cavitation wear correspondingly than the original porous SiC.