The U.S. Nuclear Regulatory Commission (NRC) is updating and revising NUREG-1437, "Generic Environmental Impact Statement for License Renewal of Nuclear Plants" (GEIS), which the NRC issued in May 1996. The revised GEIS provides the technical basis for amending certain NRC environmental protection regulations. The NRC has also revised NUREG-1555, Supplement 1, "Standard Review Plans for Environmental Reviews for Nuclear Power Plants, Supplement 1: Operating License Renewal" (ESRP). The ESRP serves as a guide to the NRC staff in preparing a plant-specific supplemental environmental impact statement to the GEIS. This document is announcing the issuance of NUREG-1437, Revision 1, and NUREG-1555, Revision 1.