Assuming only one rotor cracks, then the radiation is from one rotor IBIS and the detector electronics could detect radiation levels that ripple synchronously with the rotor speed.
The Strontium-90 is a beta radiation emitter.
The external radiation level of the IBIS [is] 75 mR/hr at 12 inches in the failure (extended) mode.
Comments
Assuming only one rotor cracks, then the radiation is from one rotor IBIS and the detector electronics could detect radiation levels that ripple synchronously with the rotor speed.
The Strontium-90 is a beta radiation emitter.