2017 | AFC ACCOMPLISHMENTS 15 system codes applicable to ATF evalua- tion.The Cladding and Core Materials (TF2) and Fuel Concepts (TF3) task forces are working to identify gaps and needs for modeling and experi- mental demonstration; define key properties of interest; identify the data necessary to perform concept evalu- ation under normal conditions and illustrative scenarios; identify available infrastructure (internationally) to support experimental needs; and make recommendations on priorities.Where possible, considering proprietary and other export restrictions (e.g., Interna- tionalTraffic in Arms Regulations), the Expert Group will facilitate the sharing of data and lessons learned across the international group membership. The Systems Assessment task force is chaired by Shannon Bragg-Sitton (Idaho National Laboratory [INL], U.S.), the CladdingTask Force is chaired by Marie Moatti (Electricite de France [EdF], France), and the FuelsTask Force is chaired by Masaki Kurata (Japan Atomic Energy Agency [JAEA], Japan).The original Expert Group mandate was established for June 2014 to June 2016. In April 2016 the Expert Group voted to extend the mandate one additional year to June 2017 in order to complete the task force deliverables; this request was subsequently approved by the Nuclear Science Committee.All three task forces are expected to publish their respec- tive deliverable reports in Fall 2017 following the final task force meeting in November 2017. IAEA Coordinated Research Project on Accident Tolerant Fuels for LWRs (ACTOF) The Fuel Performance andTechnology Technical Working Group (FPTTWG) within the International Atomic Energy Agency (IAEA) established a coordinated research project (CRP) on ATF for LWRs (ACTOF) in 2015 (CRP-T12030). CRPs are typically initiated with a technical workshop, followed by a solicitation for proposals on potential projects under the CRP. Each CRP runs approximately 4 years, with a joint plan for the work established based on proposals submitted by various member institutes/organizations. Studies under that joint plan are typically managed through a series of consultants meetings and small contracts.A technical meeting on ATF for LWRs was initially held in October 2014 at ORNL to launch the ACTOF CRP. Focused on nuclear fuel performance and safety, the objective of ACTOF is to support options for the development of nuclear fuel with improved tolerance of severe accident conditions through experiments to acquire data on new fuel and cladding materials and modeling of new fuel designs using ATF materials.ACTOF is expected to provide information to IAEA Member States to support decision making on ATF choices and to provide data, analyses, and advanced techniques to understand and predict the integral performance of ATF designs under normal, tran- sient, and severe accident conditions. The first Research Coordination Meeting (RCM) on ACTOF was held in November 2015 and was attended by 14 organizations across 11 countries, including Westinghouse and Battelle Energy Alliance (BEA, with INL as the participating laboratory) in the U.S. The Westinghouse contribution to the CRP will include information associ- ated with the design and development of U3Si2 and UN-U3Si2 composite fuel, SiC composite cladding,Ti2AlC coated Zr cladding, and SiC wrapped Zr cladding.The INL contribution will provide implementation of material models and properties for FeCrAl and U3Si2 in INL’s fuel performance code BISON, validate models against experiments, perform simulations of fuel rod behavior with ATF clad- ding and/or fuel (under normal and accident conditions), and perform sensitivity studies on critical mate- rial properties using BISON interfaced with DOE uncertainty quantification tools.Additional participants currently include Karlsruhe Institute ofTech- nology (KIT) in Germany, VTTTechnical Research Center in Finland,A.A. Bochvar Institue (VNIINM) in Russia, Bhabha Atomic Research Centre (BARC) in India, and Korea Atomic Energy Research Institute (KAERI) in Korea. Proposals will still be accepted until the next RCM, tentatively scheduled for Sprint/ Summer 2017.