In the framework of studies on hydrogen diffusion dynamics in metals, neutron imaging has become a sought-after analytical method. Multiple advantages come along with this analytical method. It is a non-destructive method, even small amounts of hydrogen are detectable, it is spatially resolvable, the sample’s hydrogen content is three-dimensionally resolvable with neutron tomography and in case of metals with low neutron cross sections it can visualize the diffusion dynamics in-situ. Because of the very low neutron cross section of zirconium, the metal is nearly invisible for neutrons and the contrarily behaving hydrogen that scatters neutrons strongly, appears as dark contrast in neutron images.

In order to investigate zirconium alloyed cladding tubes that are used in the nuclear industry in fuel rods under influence of strain and temperature, the transportable INCHAMEL (in-situ neutron radiography chamber with mechanical load) facility was constructed in cooperation with the company ZwickRoell. The unique facility creates a homogeneous temperature field within the sample and is equipped with all features of a tensile testing machine. The machine’s design was optimized in detail to fulfill the requirements for the usage in neutron scattering and imaging facilities. In this manner, neutron radiography investigations can be performed with the neutron beam passing through the sample without any disturbances by installations like beam windows, furnace tubes, heater wires, etc.

This paper describes the characteristics and features of the new INCHAMEL facility and provides first testing results outside of neutron facilities, where mainly temperature and strain settings were tested.