b'Investigation of I-Loops for Ramp TestingPrincipal Investigator: N. Woolstenhulme, INLTeam Members/ Collaborators: N. Oldham, T. Maddock, K. Horman, M. Ramirez and H. Hiruta (INL)Figure 1. Booster Fuel in Large-I Position.Preliminary design andT he Advanced Test Reactorsbe needed in order to address Halden (ATR) existing Light Watercapability gaps using ATR. Anticipated safety evaluations haveReactor (LWR) loop in thetesting will be performed in two been performed andcenter flux trap provides ampleseparate loops conditions, Boiling show that the I-Loopflux for both prototypic andWater Reactor (BWR) and Pressurized design effort in ATRaccelerated burnup accumulationWater Reactor (PWR), running base is a viable strategyin approximately 30 test rodlets,irradiations and ramp testing with to address LWR fuela handful of which can beinstrumented specimens.irradiation testingcomprehensively instrumented.Project Description:capability gaps left byThis loop alone cannot satisfy theThe HBWR in Norway has been a the HBWR closure ascapabilities and demand required forprimary irradiation test facility for well as enhance testingLWR fuel testing. The Halden BoilingLWR nuclear fuels and materials capabilities includingWater Reactors (HBWR) was a mainbehavior to assess fuel performance ramp testing. provider of irradiation testing offor nuclear regulators. Due to LWR fuel. However, the closure andtechnical issues, financial risk, decommissioning announcement and political challenges, Haldens of the Halden Reactor has left a parent organization Institute for major void. Energy Technology (IFE) voted to Additional LWR loops (I-Loops),permanently close the reactor. This which are not subject to some ofis a major loss to the LWR industry the availability and size constraintsbecause there are few testpresent in flux trap-based loops, willfacilities available for advancing reactor technologies. 126 2019|AFC ACCOMPLISHMENTS'