The mobile monitoring system for container transport (MMCT) monitors the transfer of spent fuel via railcar and consists of radiation monitoring, video surveillance and GPS location equipment, and smart power management. Radiation sensors detect the spent fuel assembly during the loading, transfer and unloading process. The detector enclosure contains the detector assembly, comprising six 3He neutron tubes and two ionization chambers. The system is capable of acquiring safeguards data over a continuous period of more than one week under harsh outdoor environmental conditions without recharging of batteries being required.

(Source: IAEA Safeguards Techniques and Equipment)