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) involves the examination of spent nuclear materials like nuclear fuel to understand its behavior under normal conditions and potential accidents. This analysis helps identify failure modes that can be learned from used fuel.