[2D05-10] TRU Waste 1

[2D08] Leaching behavior of radionuclides from irradiated endpiece under geological repository condition

(5) Experimental evaluation for the C-14 release fraction by Accelerator mass spectrometry

*Naoki Tezuka¹, Hiroaki Suganuma¹, Kenichiro Kino¹, Toshinori Taniuchi², Akira Sakashita², Hiroyuki Matsuzaki³, Hiroyoshi Ueda⁴, Tomofumi Sakuragi⁴ (1. NDC, 2. MHI, 3. UTokyo, 4. RWMC)

Keywords:TRU waste, Geological disposal, Hull endpiece, C-14, Accelerator Mass Spectrometry (AMS)

In the safety assessment of TRU waste disposal, it is important to understand the release behavior of C-14 from TRU waste. In particular, the amount of metal waste such as end pieces discussed in this study is limited for an experiment due to the high concentration of radioactivity. In addition, since the emission rate of C-14 is slow, it has been difficult to obtain the measured data on the emission rate of C-14 because the measurement sensitivity is not sufficient by the conventional radiometric approach. In this study, we used Accelerator Mass Spectrometry and performed quantitative analysis of very small amounts of C-14 emitted from endpiece specimens in an experimental environment.