CIP includes a total of twelve tests. The first two reactivity injection tests on irradiated fuel rods were performed in 2002 in the Cabri reactor equipped with a "sodium loop", i.e., in which the coolant is liquid sodium. The loop represents the reactor coolant system in which the reactor coolant circulates. The two tests provided an opportunity to study phenomena that do not depend on the nature of this coolant (PCMI phase).
However, to study accident conditions in a PWR (phase post-DNB and fuel-coolant interaction in the event of cladding failure), the "sodium loop" had to be replaced by a pressurized water loop. The renovation of the reactor core cooling system, as well as the remediation work to bring the facility into compliance, have been completed. The following ten tests in the program consist in exposing the sections of irradiated fuel to conditions found during a reactivity injection accident. The following table lists the characteristics of the fuels that will be tested and the main objectives of each of the tests