The impact of interface bonding efficiency on high-burnup spent nuclear fuel dynamic performance

Journal Article · Mon Sep 26 00:00:00 EDT 2016 · Nuclear Engineering and Design

DOI:https://doi.org/10.1016/j.nucengdes.2016.09.013· OSTI ID:1332069

Jiang, Hao ^[1]; Wang, Jy-An John  ^[1]; Wang, Hong ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Finite element analysis (FEA) was used to investigate the impact of interfacial bonding efficiency at pellet-pellet and pellet-clad interfaces of high-burnup (HBU) spent nuclear fuel (SNF) on system dynamic performance. Bending moments M were applied to FEA model to evaluate the system responses. From bending curvature, κ, flexural rigidity EI can be estimated as EI = M/κ. The FEA simulation results were benchmarked with experimental results from cyclic integrated reversal bending fatigue test (CIRFT) of HBR fuel rods. The consequence of interface debonding between fuel pellets and cladding is a redistribution of the loads carried by the fuel pellets to the clad, which results in a reduction in composite rod system flexural rigidity. Furthermore, the interface bonding efficiency at the pellet-pellet and pellet-clad interfaces can significantly dictate the SNF system dynamic performance. With the consideration of interface bonding efficiency, the HBU SNF fuel property was estimated with CIRFT test data.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1332069
• Alternate ID(s): OSTI ID: 1397954
• Journal Information: Nuclear Engineering and Design, Vol. 309, Issue C; ISSN 0029-5493
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
spent nuclear fuel
interface bonding
dynamic performance