[1O01-03] Applications of Compact Neutron Source

[1O03] Modified Design of Mobile 3.95 MeV X-band Linac Neutron Source

*Jean-Michel Antoine Bereder¹, Yuki Mitsuya¹, Mitsuru Uesaka¹, Yoshichika Seki² (1.NEM, The University of Tokyo, 2.JAEA J-PARC Center)

Keywords:Neutron Source, Mobile Electron Linear Accelerator, Social Infrastructure Inspection, Moisture Inspection

The existing non-destructive inspection method using high energy X-ray for social infrastructures is aimed to detect the inner flaw in concrete structure and iron rods. In addition to the conventional method, development of an innovative inspection system using mobile neutron source to perform neutron backscatter moisture detection to measure moisture distribution in concrete structure is progressing, in order to estimate the corrosion probability distribution of iron rods.
We developed the mobile linac driven neutron source using (γ, n) reaction of beryllium and succeeded in moisture detection experiment. In the new design, we downsized the target by reducing its neutron and gamma ray shield. The neutron flux has increased by a factor of 10 compared to the former design so that the estimated detection time is shortened to about 1 minute, and the target weight is reduced to 70kg, making it much more manageable in actual use.