干旱区生态环境知识资源中心(Arid): Geothermal areas as analogues to chemical processes in the near-field and altered zone of the potential Yucca Mountain, Nevada repository

Arid

DOI	10.2172/106518
报告编号	UCRL-ID--119842
来源ID	OSTI_ID: 106518
	Geothermal areas as analogues to chemical processes in the near-field and altered zone of the potential Yucca Mountain, Nevada repository
	Bruton, C.J.; Glassley, W.E.; Meike, A.
英文摘要	The need to bound system performance of the potential Yucca Mountain repository for thousands of years after emplacement of high-level nuclear waste requires the use of computer codes. The use of such codes to produce reliable bounds over such long time periods must be tested using long-lived natural and historical systems as analogues. The geothermal systems of the Taupo Volcanic Zone (TVZ) in New Zealand were selected as the site most amenable to study. The rocks of the TVZ are silicic volcanics that are similar in composition to Yucca Mountain. The area has been subjected to temperatures of 25 to 300 C which have produced a variety of secondary minerals similar to those anticipated at Yucca Mountain. The availability of rocks, fluids and fabricated materials for sampling is excellent because of widespread exploitation of the systems for geothermal power. Current work has focused on testing the ability of the EQ3/6 code and thermodynamic data base to describe mineral-fluid relations at elevated temperatures. Welfare starting long-term dissolution/corrosion tests of rocks, minerals and manufactured materials in natural thermal features in order to compare laboratory rates with field-derived rates. Available field data on rates of silica precipitation from heated fluids have been analyzed and compared to laboratory rates. New sets of precipitation experiments are being planned. The microbially influenced degradation of concrete in the Broadlands-Ohaaki geothermal field is being characterized. The authors will continue to work on these projects in FY 1996 and expand to include the study of naturally occurring uranium and thorium series radionuclides, as a prelude to studying radionuclide migration in heated silicic volcanic rocks. 32 refs.
出版年	1995
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	05 NUCLEAR FUELS ; YUCCA MOUNTAIN ; RADIOACTIVE WASTE FACILITIES ; PERFORMANCE ; E CODES ; NEW ZEALAND ; GEOTHERMAL SYSTEMS ; SAMPLING ; VALIDATION ; HIGH-LEVEL RADIOACTIVE WASTES ; RADIOACTIVE WASTE DISPOSAL ; COMPUTERIZED SIMULATION ; MATHEMATICAL MODELS ; ROCK-FLUID INTERACTIONS ; MATERIALS TESTING ; CORROSION RESISTANCE ; BROADLANDS GEOTHERMAL FIELD ; MINERALOGY ; GEOLOGY ; HYDROLOGY ; Yucca Mountain Project Geothermal Legacy
URL	http://www.osti.gov/scitech/servlets/purl/106518
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266000
推荐引用方式 GB/T 7714	Bruton, C.J.,Glassley, W.E.,Meike, A.. Geothermal areas as analogues to chemical processes in the near-field and altered zone of the potential Yucca Mountain, Nevada repository,1995.