干旱区生态环境知识资源中心(Arid): Bench-scale experimental determination of the thermal diffusivity of crushed tuff

Arid

DOI	10.2172/395414
报告编号	SAND--94-2320
来源ID	OSTI_ID: 395414
	Bench-scale experimental determination of the thermal diffusivity of crushed tuff
	Ryder, E.E.; Finley, R.E.; George, J.T.; Ho, C.K.; Longenbaugh, R.S. [Sandia National Labs., Albuquerque, NM (United States)]; Connolly, J.R. [New Mexico Univ., Albuquerque, NM (United States)]
英文摘要	A bench-scale experiment was designed and constructed to determine the effective thermal diffusivity of crushed tuff. Crushed tuff particles ranging from 12.5 mm to 37.5 mm (0.5 in. to 1.5 in.) were used to fill a cylindrical volume of 1.58 m{sup 3} at an effective porosity of 0.48. Two iterations of the experiment were completed; the first spanning approximately 502 hours and the second 237 hours. Temperatures near the axial heater reached 700 degrees C, with a significant volume of the test bed exceeding 100 degrees C. Three post-test analysis techniques were used to estimate the thermal diffusivity of the crushed tuff. The first approach used nonlinear parameter estimation linked to a one dimensional radial conduction model to estimate thermal diffusivity from the first 6 hours of test data. The second method used the multiphase TOUGH2 code in conjunction with the first 20 hours of test data not only to estimate the crushed tuffs thermal diffusivity, but also to explore convective behavior within the test bed. Finally, the nonlinear conduction code COYOTE-II was used to determine thermal properties based on 111 hours of cool-down data. The post-test thermal diffusivity estimates of 5.0 x 10-7 m{sup 2}/s to 6.6 x 10-7 m{sup 2}/s were converted to effective thermal conductivities and compared to estimates obtained from published porosity-based relationships. No obvious match between the experimental data and published relationships was found to exist; however, additional data for other particle sizes and porosities are needed.
出版年	1996
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	05 NUCLEAR FUELS ; 36 MATERIALS SCIENCE ; TUFF ; THERMAL DIFFUSIVITY ; HIGH-LEVEL RADIOACTIVE WASTES ; UNDERGROUND DISPOSAL ; T CODES ; CONVECTION ; SEALING MATERIALS ; MATERIALS TESTING ; YUCCA MOUNTAIN ; POROSITY ; CONTAINMENT ; SITE CHARACTERIZATION ; MOISTURE
URL	http://www.osti.gov/scitech/servlets/purl/395414
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266592
推荐引用方式 GB/T 7714	Ryder, E.E.,Finley, R.E.,George, J.T.,et al. Bench-scale experimental determination of the thermal diffusivity of crushed tuff,1996.