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Analysis of Density Changes in Plutonium Observed from Accelerated Aging Using Pu-238 Enrichment
S. R. Thompson
D. J. Hopkins
B. W. Chung
C. H. Woods
T. M. Quick
C. K. Saw
B. B. Ebbinghaus
出版
United States. Department of Energy
, 2006
URL
http://books.google.com.hk/books?id=IbjyjwEACAAJ&hl=&source=gbs_api
註釋
We present dimensional and density changes in an aging plutonium alloy enriched with 7.3 at.% of {sup 238}Pu and reference alloys of various ages. After 45 equivalent years of aging, the enriched alloys at 35 C have swelled in volume by 0.14 to 0.16% and now exhibit a near linear volume increase, without void swelling. Based on X-ray diffraction measurements, the lattice expansion by self-irradiation appears to be the primary cause for dimensional changes during the initial 2-3 years of aging. Following the initial transient, the density change is primarily cause by a constant helium in-growth rate as a result of {alpha}-particle decay.
