The NRC issued an Environmental Assessment and Finding of No Significant Impact (FONSI) for an exemption request by Vistra Operations Company LLC (VistraOps) at Perry Nuclear Power Plant, Unit 1, in North Perry, Ohio. The exemption allows VistraOps to load two Holtec MPC-89-CBS (89-assembly multi-purpose canisters with continuous basket shims) in the HI-STORM Flood/Wind storage system at Perry's Independent Spent Fuel Storage Installation, despite the MPC-89-CBS configuration not meeting Certificate of Compliance No. 1032, Amendment No. 5. The NRC concluded no significant environmental impacts would result, and the exemption is needed to maintain spent fuel pool capacity through 2028.