摘要
耐火材料的选择对放射性核废料的玻璃化过程是至关重要的 ,本文采用动态耐火材料腐蚀速度技术比较了铁磷模拟放射性核废料熔体和硼硅酸盐熔体DWPF的腐蚀性质 ,测量在10 0 0至 130 0℃之间进行。在铁磷熔体中 ,致密氧化铝和氧化铬耐火材料有最低的熔线腐蚀速度 ,二氧化硅、锆英石和AZS耐火材料的腐蚀速度比较高。同时 ,氧化铝和氧化铬耐火材料在铁磷熔体中的腐蚀速度小于它们在硼硅酸盐熔体DWPF中的腐蚀速度。对氧化铬耐火材料来说 ,其在三种含有模拟HLW废料的铁磷熔体中的熔线腐蚀速度小于 0 1mm day。按照DWPF熔化器的设计标准 ,Alumina和Zircon商品耐火材料可以用来熔化多种HLW废料。
Proper selection of melt contact refractory is paramount in the vitrification of high level waste(HLW),the dynamic corrosion rate was measured in the iron phosphate melts containing simulated HLW and a borosilicate melt(DWPF) in six commercial refractories at temperatures from 1000 to 13000℃.A dense alumina and a chrome refractory had the lowerst melt-line corrosion rate in the iron phosphate melts,whereas the corrosion rate for silica,zircon,and alumina-zirconia-silica(AZS)refractories was somewhat high.In general,the corrosion rate for the alumina and chrome refractory in the iron phosphate melts was no higher than their corrosion rate in the DWPF melt now used at the Savannah River Site.For the chrome refractory,the corrosion rate in three iron phosphate melts containing simulated HLW waste was under 0 1mm/day at the melt line.It is concluded that commercially manufactured,dense alumina or chrome refractories should be acceptable for melting many iron phosphate composition accoding to the design value of DWPE.
出处
《材料科学与工程》
CSCD
北大核心
2001年第3期54-59,共6页
Materials Science and Engineering
基金
中国留学基金委和美国能源部资助 (DE FG0 7 96ER45 618)
