Cryogenic Thermal Expansion of Y-12 Graphite Fuel Elements

摘要

Thermal expansion measurements between 20°K and 300°K were made on segments of three uranium-loaded Y-12 uncoated graphite fuel elements. The thermal expansion of these fuel elements over this temperature range is represented by the equation:n△L/L = -39.42 x 10-5 + 1.10 x lO-7 T+ 6.47 x 10-9 TZ -8.30 x 10-l2 T3.