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Colin Judge: Testing structural materials in Idaho’s newest hot cell facility
Idaho National Laboratory’s newest facility—the Sample Preparation Laboratory (SPL)—sits across the road from the Hot Fuel Examination Facility (HFEF), which started operating in 1975. SPL will host the first new hot cells at INL’s Materials and Fuels Complex (MFC) in 50 years, giving INL researchers and partners new flexibility to test the structural properties of irradiated materials fresh from the Advanced Test Reactor (ATR) or from a partner’s facility.
Materials meant to withstand extreme conditions in fission or fusion power plants must be tested under similar conditions and pushed past their breaking points so performance and limitations can be understood and improved. Once irradiated, materials samples can be cut down to size in SPL and packaged for testing in other facilities at INL or other national laboratories, commercial labs, or universities. But they can also be subjected to extreme thermal or corrosive conditions and mechanical testing right in SPL, explains Colin Judge, who, as INL’s division director for nuclear materials performance, oversees SPL and other facilities at the MFC.
SPL won’t go “hot” until January 2026, but Judge spoke with NN staff writer Susan Gallier about its capabilities as his team was moving instruments into the new facility.
Kazuhiro Sawa, Isao Murata, Shusaku Shiozawa, Mikio Matsumoto
Nuclear Technology | Volume 106 | Number 3 | June 1994 | Pages 265-273
Technical Paper | Nuclear Reactor Safety | doi.org/10.13182/NT94-A34957
Articles are hosted by Taylor and Francis Online.
In high-temperature gas-cooled reactors, a small amount of fission products (FPs) are released from fuel elements during normal operation, and condensable FPs plate out on the inner surface of primary cooling system components. In a depressurization accident, plated out FPs would be forced to reentrain or lift off by chemical and/or mechanical forces. The amount of liftoff FPs is important because they have a potential hazard of radiation exposure to the environment. In order to investigate the behavior of FPs under the rapid depressurization condition caused by a large-scale pipe rupture accident, blow down, wipe off, and leaching tests were carried out. It is observed that the liftoff of plated out FPs is caused not only by desorption but also by mechanical phenomena such as break of microstructure on the metal surface in the rapid depressurization condition. Then, it is considered that the liftoff fraction would depend on the fraction of migration of FPs into the oxide film or base metal.
