A fuel cycle for the HFIR normally consists of full-power operation at 85 MW for a period of 21 to 23 days (depending on the experiment and radioisotope load in the reactor), followed by an end-of-cycle outage for refueling. End-of-cycle refueling outages vary as required to allow for control plate replacement, calibrations, maintenance, and inspections. Experiment insertion and removal may be accomplished during any end-of-cycle outage. Interruption of a fuel cycle for experiment installation or removal is strongly discouraged to avoid impact on other experiments and neutron scattering.