Post Irradiation Examination (PIE) is the study of used nuclear materials such as nuclear fuel. It has several purposes. It is known that by examination of used fuel that the failure modes which occur during normal use (and the manner in which the fuel will behave during an accident) can be studied.
Post Irradiation Examination (PIE) is a method for investigating spent nuclear materials like nuclear fuel to gain insights into their behavior under normal conditions and potential accidents. This examination helps identify failure modes that can be learned from used fuel.