b'Figure 1. MITR irradiation of chrome coated zirconium cladding showed excellent performance.Accomplishments: istics which will facilitate high burnup A draft Topical Report for ADOPT fuel/ high enrichment core designs, was sent to the NRC. including accident tolerant features.Coatings using physical vapor deposi- General Atomics (GA) is continuing tion (PVD) are being evaluated fordevelopment of their SiGA clad fuel mechanical properties and comparedusing a Sn liquid metal bonding tech-to cold spray (CS) applied coatings.nique. A detailed analysis is underway Corrosion testing both in and out ofat GA to determine the root cause of reactor is being pursued. A cost studythe leak test discrepancy indicating that has concluded that PVD and CS coststhere is a feature unique to the third are comparable. PVD offers an advan- rodlet that has not yet been determined.tage over CS in that the Zr-Cr interfaceTests are continuing at the MITR at pres-thickness variability is smaller and thesurized water reactor (PWR) coolant neutronic penalty is therefore some- conditions on the Cr coated Zr and SiC what smaller. cladding options as well as the in-rod Efforts were initiated to determinesensor that is being developed by West-the safety significant consequences ofinghouse to support the ATF testing and postulated fuel fragmentation, reloca- licensing process. The results indicate tion, and dispersal (FFRD) in loss-of- minimal corrosion of the Cr coated coolant accident (LOCA) scenarios forZr samples and minimal to moderate the high burnup-higher enrichmentcorrosion of the SiC, depending on the (HBHE) program. Initial representativemanufacturing conditions of the SiC and 3- and 4-loop high burnup and enrich- the manufacturer.ment core designs were developed toLTRs containing EnCore cold sprayed facilitate investigations of fuel rod andCr coated rods with UO 2were deliv-safety analysis limits. Initial steps wereered to Tractebel in late April 2020 for taken to define the fuel rod character- loading in Doel 4 during the summer 2020 outage.2020|AFC ACCOMPLISHMENTS 35'