Detection apparatus

A detection apparatus useable with a nuclear fuel rod, comprising:

• a transmitter structured to be outside the nuclear fuel rod, wherein the transmitter is configured to:
• generate an excitation pulse;
• and
• transmit the excitation pulse through a material into a volume surrounded by the material;
• a sensing circuit positioned within the volume of the nuclear fuel rod and comprising an inductor and a capacitor, wherein the sensing circuit is configured to:
• generate a response pulse in response to the excitation pulse;
• and
• transmit the response pulse through the material to a space external to the material, wherein the response pulse is indicative of a parameter associated with the volume;
• and
• a receiver, wherein the receiver is positioned in the space and is configured to communicate a signal representative of the response pulse.

A detection apparatus useable with a nuclear fuel rod, comprising:

• a transmitter structured to be outside the nuclear fuel rod, wherein the transmitter is configured to:
• generate an excitation pulse;
• and
• transmit the excitation pulse through a material into a volume surrounded by the material, wherein the volume is within a nuclear fuel rod;
• means for generating a response pulse in response to the excitation pulse and for transmitting the response pulse through the material to a space external to the material, wherein the response pulse is indicative of a parameter associated with the volume;
• and
• a receiver, wherein the receiver is positioned in the space and is configured to communicate a signal representative of the response pulse.