A detection apparatus usable with a fuel rod from among a plurality of fuel rods of a fuel assembly , the fuel rod having a cladding that has an interior region , the fuel rod being situated within a nuclear reactor , the detection apparatus being cooperable with an electronic processing apparatus situated outside of the nuclear reactor , the detection apparatus characterized by : a transmitter positioned outside the cladding and inside the nuclear reactor in the vicinity of the fuel rod , the transmitter being structured to generate an excitation pulse in the form of a first magnetic field signal and to wirelessly transmit the excitation pulse , the excitation pulse being structured to travel wirelessly through the cladding and into the interior region ; an electrical circuit apparatus having a resonant electrical circuit supported within the interior region , the resonant electrical circuit being structured to generate a response pulse in the form of a second magnetic field signal in response to the excitation pulse and to wirelessly transmit the response pulse , the response pulse being structured to travel wirelessly from the interior region and through the cladding ; the resonant electrical circuit comprising a plurality of circuit components , at least one circuit component of the plurality of circuit components having a property which is structured to vary in response to a condition of the fuel rod and which, responsive to a change in the condition, is structured to cause the property and the response pulse to vary with the change in the condition and to be indicative of the condition; and a receiver supported within the nuclear reactor outside the cladding and in the vicinity of the fuel rod , the receiver being structured to receive the response pulse and to communicate to the electronic processing apparatus an output responsive to the received response pulse . a transmitter positioned outside the cladding and inside the nuclear reactor in the vicinity of the fuel rod , the transmitter being structured to generate an excitation pulse in the form of a first magnetic field signal and to wirelessly transmit the excitation pulse , the excitation pulse being structured to travel wirelessly through the cladding and into the interior region ; an electrical circuit apparatus having a resonant electrical circuit supported within the interior region , the resonant electrical circuit being structured to generate a response pulse in the form of a second magnetic field signal in response to the excitation pulse and to wirelessly transmit the response pulse , the response pulse being structured to travel wirelessly from the interior region and through the cladding ; the resonant electrical circuit comprising a plurality of circuit components , at least one circuit component of the plurality of circuit components having a property which is structured to vary in response to a condition of the fuel rod and which, responsive to a change in the condition, is structured to cause the property and the response pulse to vary with the change in the condition and to be indicative of the condition; and a receiver supported within the nuclear reactor outside the cladding and in the vicinity of the fuel rod , the receiver being structured to receive the response pulse and to communicate to the electronic processing apparatus an output responsive to the received response pulse . <EOS>