A message received on 8/10/13 from DGT...
For the history:
We first realized such magnetic noise linked with thermal anomalies 18 months ago, when we were making tests with R4 Reactors with isoparabolic calorimetry. One day whilest huge thermal anomalies were observed in the active reactor, our cell phones got grazy and the line telephone system was full of noise! We tried to repeat the noise with Ar with no success. So we started looking on this seriously not just as a noise problem. At that time we were seeking for any possible gamma radiation as the main source of lab danger. We realized that we, as well as all before us, that we were looking the wrong way. I think that you know the rest of the story. Out of public health protection from magnetic radiation we phased the problem of protection of the control electronics, living very close to the reactor. That was (and still is) a major challenge for NI engineers too.