The potential need to store Spent Nuclear Fuel (SNF) for many decades will have a near-term and potentially significant impact on nuclear plant licensing and operations.  While dry storage of lower burnup SNF [less than 45 gigawatt days per metric ton uranium (GWD / MTU)] has occurred since 1986, dry storage of high burnup SNF is more recent. Approximately 200 dry storage casks now have been loaded with at least some high burnup SNF, and almost all SNF being loaded in the U.S. is now high burnup.  Industry needs additional data on high burnup SNF under typical storage conditions.  In response to DOE R&D project initiation, the Electric Power Research Institute (EPRI, project lead) in concert with U.S. national laboratories are developing and implementing this test plan to collect data from an SNF dry storage system containing high burnup fuel.  This Test Plan for the High Burnup Dry Storage Research Project (HDRP) outlines the data to be collected, the high burnup fuel to be included,   and the storage system design, procedures, and licensing necessary for implementation.  The Test Plan results are anticipated to provide confirmatory data to support license extensions of ISFSIs containing high burnup spent fuel and to evaluate the integrity of the dry storage systems.  Planned models and tests are intended to supply a large amount of data relevant to the assessment of the safety of long-term storage followed by transportation.