干旱区生态环境知识资源中心(Arid): Radiation effects in moist-air systems and the influence of radiolytic product formation on nuclear waste glass corrosion

Arid

DOI	10.2172/548617
报告编号	ANL--97/15
来源ID	OSTI_ID: 548617
	Radiation effects in moist-air systems and the influence of radiolytic product formation on nuclear waste glass corrosion
	Wronkiewicz, D.J.; Bates, J.K.; Buck, E.C.; Hoh, J.C.; Emery, J.W. [Argonne National Lab., IL (United States). Chemical Technology Div.]; Wang, L.M. [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Geology]
英文摘要	Ionizing radiation may affect the performance of glass in an unsaturated repository site by interacting with air, water vapor, or liquid water to produce a variety of radiolytic products. Tests were conducted to examine the effects of radiolysis under high gas/liquid ratios. Results indicate that nitrate is the predominant radiolytic product produced following both gamma and alpha radiation exposure, with lesser amounts of nitrite and carboxylic acids. The formation of nitrogen acids during exposure to long-lived, alpha-particle-emitting transuranic elements indicates that these acids may play a role in influencing nuclear waste form reactions in a long-term unsaturated disposal scenario. Experiments were also conducted with samples that simulate the composition of Savannah River Plant nuclear waste glasses. Radiolytic product formation in batch tests (340 m{sup {minus}1}, 90 C) resulted in a small increase in the release rates of many glass components, such as alkali and alkaline earth elements, although silicon and uranium release rates were slightly reduced indicating an overall beneficial effect of radiation on waste form stability. The radiolytic acids increased the rate of ion exchange between the glass and the thin film of condensate, resulting in accelerated corrosion rates for the glass. The paragenetic sequence of alteration phases formed on both the irradiated and nonirradiated glass samples reacted in the vapor hydration tests matches closely with those developed during volcanic glass alteration in naturally occurring saline-alkaline lake systems. This correspondence suggests that the high temperatures used in these tests have not changed the underlying glass reaction mechanism relate to that which controls glass reactions under ambient surficial conditions.
出版年	1997
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	36 MATERIALS SCIENCE ; 05 NUCLEAR FUELS ; WASTE FORMS ; CORROSION ; RADIOACTIVE WASTE DISPOSAL ; GLASS ; RADIOLYSIS ; MOISTURE ; NITRATES ; NITRITES ; CARBOXYLIC ACIDS ; LEACHING ; ALPHA PARTICLES ; GAMMA RADIATION ; EXPERIMENTAL DATA
URL	http://www.osti.gov/scitech/servlets/purl/548617
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/267203
推荐引用方式 GB/T 7714	Wronkiewicz, D.J.,Bates, J.K.,Buck, E.C.,et al. Radiation effects in moist-air systems and the influence of radiolytic product formation on nuclear waste glass corrosion,1997.