RTK system robust for HIGH VOLTAGE near inspection

I have a customer that has to fly near high voltage lines. Voltage is 360000 and 150000 volt. Both 40 meter away. They have the HERE+ RTK system. Now because of safety the client ask a safety analyse to be sure this RTK system will work or not. Or if we have to install a more robust RTK system.

Also as info they tested the M200 RTK from DJI and this system got interference and did crash.
only the M210 and M300 is working in this area.

thanks