2005 Volume 4 Issue 3 Pages 194-202
The radon emanation fraction E is a very important parameter for safety assessment of uranium bearing waste. However, reported E values have been measured only for natural material or uranium ore. This paper describes the development of a measurement method of E for uranium bearing waste, and presents measured E values for calcium super phosphate.
Measured E values were dependent on moisture saturation M and the maximum E was measured when M was about 0.2. The E values for the calcinated material were low, 1/4 to 1/6 of those for the raw material. Each E value was estimated by two methods: using Eg which was based on a difference of gamma ray counts, and using Ea which was based on alpha-ray count. Almost all the Eg values were in good agreement with the Ea values.
