Full-Scale Assembly 30 cm Drop Test
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MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.477
Full-Scale Assembly 30 cm Drop Test Elena Kalinina1, Doug Ammerman1, Carissa Grey1, Gregg Flores1, Sylvia Saltzstein1, Nicholas Klymyshyn2 1
Sandia National Laboratories, United States
2
Pacific Northwest National Laboratory, United States
ABSTRACT
Can Spent Nuclear Fuel withstand the shocks and vibrations experienced during normal conditions of transport? This question was the motivation for the multi-modal transportation test (MMTT) (Summer 2017), 1/3-scale cask 30 cm drop test (December 2018), and full-scale assembly 30 cm drop tests (June 2019). The full-scale ENSA ENUN 32P cask with 3 surrogate 17x17 PWR assemblies was used in the MMTT. The 1/3-scale cask was a mockup of this cask. The 30 cm drop tests provided the accelerations on the 1/3-scale dummy assemblies. These data were used to design full-scale assembly drop tests with the goal to quantify the strain fuel rods experience inside a cask when dropped from a height of 30 cm. The drop tests were first done with the dummy and then with the surrogate assembly. This paper presents the preliminary results of the tests.
INTRODUCTION The goal of the full-scale dummy assembly drop test was to obtain data on accelerations of the full-scale dummy assembly during a 30 cm horizontal drop (normal conditions of transport). These data can be then used to design the 30 cm drop test of the full-scale surrogate fuel assembly. A surrogate assembly is one that includes top and bottom nozzles, spacer grids, and tubes filled with non-radioactive material. A dummy assembly has the same mass and cross-sectional area as the surrogate assembly but is made of a single piece of steel. The 30 cm drop is the remaining NRC normal conditions of transportation regulatory requirement (10 CFR 71.71) for which there are no data on the actual surrogate fuel. While obtaining data on the actual fuel is not a direct requirement, it provides definitive information which aids in quantifying the risk of fuel breakage resulting from a cask drop from a height of 30 cm or less. 265
Downloaded from https://www.cambridge.org/core. Rice University, on 17 May 2020 at 03:27:00, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2019.477
The 30 cm drop test was a follow-on to the 2017 Spanish/US/Korean MultiModal Transportation Test (MMTT) that obtained strain and acceleration data on surrogate fuel within the ENUN 32P dual purpose rail cask. The goal of the MMTT was to validate the hypothesis that spent nuclear fuel can withstand the shocks and vibrations from routine transport. Data were collected during actual heavy-haul truck transport through Spain, small ship from Spain to Belgium, large ship from Belgium to the USA, and rail transportation from Baltimore to Pueblo (Colorado). The results can be found in [1-6]. A short video documenting the major test events is available on YouTube [7]. Note that the common assumption is that the cask content expe
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