b'SATS In-Cell and Out-of-Cell Fuel Safety TestingPrincipal Investigator: Yong Yan, ORNLTeam Members/ Collaborators: Ken Kane, Zach Burns and Kory D. Linton (ORNL); Ken Yueh (EPRI)basis accident (DBA) and DBA scenarios including high-temperature, steam, internal pressure, and water quench. The two key highlights from fiscal year (FY) 19 include: 1) industry supported out-of-cell, unfueled testing of General Electric (GE)-ARMOR cladding and 2) Electric Power Research Institute (EPRI) proposed in-cell burst and fuel fragmentation testing of commercial high-burnup fuel (Nuclear Science User Facilities (NSUF) award).The GE-ARMOR testing was performed in support of ATF vendor data needs and provides important results on the improved embrittlement performance of coated claddings.The EPRI NSUF in-cell testing demonstrates the readiness of ORNL rodlet re-fabrication techniques and SATS testing capabilities for upcoming vendor testing needs while providing valuable data on fuel Figure 1. Typical temperature andT fragmentation behavior of high burnup pressure profile during a LOCAhe high-temperature steamfuels under accident scenarios. test sequence. The temperature isoxidation behavior of zirconium increased and held to ensure properalloy cladding under designBoth FY19 fuel safety related testing sealing of cladding tube assembly.basis Loss of Coolant Accident (LOCA)activities provide critical data supporting Burst is indicated by sudden and rapidscenarios has been studied acrossvalidation of nuclear fuel performance loss of pressure, and burst temperaturea broad set of conditions at severalcodes, such as BISON, and improve is taken at this occurrence. facilities around the world. The Severemodels designed to predict fuel system Accident Test Station (SATS) at Oakbehavior during accident scenarios.Ridge National Laboratory (ORNL)Project Description: was developed and demonstrated inOut-of-cell SATS testing was performed order to domestically re-establish thisto evaluate the impact of ARMOR testing capability for advanced nuclearcoating on burst behavior of Zircaloy-4 fuel cladding concepts with enhancedcladding under LOCA scenario accident tolerance, known as accident- conditions. A typical out-of-cell LOCA tolerant fuel (ATF).SATS is an in-celltesting procedure began with cladding and out-of-cell capability used totest train assembly using zirconia rods reproduce conditions typical of designto simulate fuel rods on the interior of 142 2019|AFC ACCOMPLISHMENTS'