[en] The Shaft Liner Design Criteria and Methodology Guide outlines a methodology for designing concrete shaft liners for the Yucca Mountain Project repository in tuff, the use of which will ensure that all shafts meet the requirements for repository service. These requirements are identified in the guide; then, unlined shaft behavior is examined to establish rock behavior modes and to investigate the development of convergence during construction. Ground pressure and induced thermal and seismic loads imposed on the shaft liner are evaluated. The modes of deformation resulting from loading, which include bending, shear, hoop deformation, and axial strain, are analyzed following a working stress approach that uses closed-form interaction models. Predicted liner stresses are then evaluated using allowable stress criteria. The methodology is illustrated with examples appropriate to the repository site at Yucca Mountain. 43 refs., 35 figs., 25 tabs