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- 저자 : Qianliang Liu (검색결과 2 건)
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Neutronic design and evaluation of the solid microencapsulated fuel in LWR
Deng Qianliang,Li Songyang,Wang Dingqu,Liu Zhihong,Xie Fei,Zhao Jing,Liang Jingang,Jiang Yueyuan 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.8
Solid Microencapsulated Fuel (SMF) is a type of solid fuel rod design that disperses TRISO coated fuel particles directly into a kind of matrix. SMF is expected to provide improved performance because of the elimination of cladding tube and associated failure mechanisms. This study focused on the neutronics and some of the fuel cycle characteristics of SMF by using OpenMC. Two kinds of SMFs have been designed and evaluated - fuel particles dispersed into a silicon carbide matrix and fuel particles dispersed into a zirconium matrix. A 7x7 fuel assembly with increased rod diameter transformed from the standard NHR200-II 9x9 array was also introduced to increase the heavy metal inventory. A preliminary study of two kinds of burnable poisons (Erbia & Gadolinia) in two forms (BISO and QUADRISO particles) was also included. This study found that SMF requires about 12% enriched UN TRISO particles to match the cycle length of standard fuel when loaded in NHR200-II, which is about 7% for SMF with increased rod diameter. Feedback coefficients are less negative through the life of SMF than the reference. And it is estimated that the average center temperature of fuel kernel at fuel rod centerline is about 60 K below that of reference in this paper
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H2S adsorption performance of alkali lignocarbon/PVA composite membrane
Youjing Li,Fen Li,Menglong Zheng,Hong Yan,Qianliang Liu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9
In this work, lignin carbon-based membranes were prepared for H2S adsorption. Alkali lignin was carbonizedto obtain alkali lignocarbon (CLA). Using the CLA and polyvinyl alcohol (PVA) as raw materials, glycerol andwater as plasticizers, and nano-CuO and Cu2+ as dopants, CLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 compositemembranes were prepared by solution casting method. The structures of these membranes and their H2S adsorptionproperties were then analyzed. The results show that with a membrane solution water-alcohol ratio of 3 : 1 and2 wt% CLA content, the prepared CLA/PVA membrane can adsorb H2S for 30 min. The CuO-CLA/PVA-1 and Cu-CLA/PVA-2 membranes, which were obtained after doping with nano-CuO and Cu2+, demonstrate significantlyimproved deodorization performance compared with that of CLA/PVA. The Cu-CLA/PVA-2 membrane can adsorbH2S for up to 75min and also demonstrates better mechanical properties. The H2S adsorption capacity of this membraneis up to 0.27 mol/kg. Structural analysis shows that the veneers of the three composite membranes are smoothand that doped copper is evenly distributed in the membranes as nano-CuO. The surface functional groups of theCLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 membranes are similar and play a positive role in H2S adsorption. Nano-CuO is the main active site for H2S adsorption in the Cu-containing composite membranes.
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