This Bulletin report describes the activities of the PVRC Steering Committee on Cyclic Life and Environmental Effects (CLEE) and the PVRC Working Group S-N Data Analysis. This report presents the PVRC recommendations to the ASME Board on Nuclear Codes and Standards (BNCS) concerning needed modifications to the ASME fatigue analysis procedure. The proposed modifications will account for the effect of the environment on the fatigue properties of the pressure boundary materials. These recommendations are in response to the following request from the BNCS:“BNCS Looks to PVRC to Obtain, Characterize, and Report in Sufficient Detail to ASME Such Data as May be Useful to ASME in its Evaluation of the Fatigue Curves of Sections IV and XI” The PVRC Committee has worked closely with, and received comments from, investigators in Japan, Europe, and America and has reviewed essentially all public domain data. We are particularly appreciative of databases and analyses provided by those in Japan working on MITI projects and in America at the Argonne National Laboratory.