Research on Spent Fuel Storage and Transportation in CRIEPI (Part 2 Concrete Cask Storage)

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Concrete cask storage has been implemented in the world. At a later stage of storage period, the containment of the canister may deteriorate due to stress corrosion cracking phenomena in a salty air environment. High resistant stainless steels against SCC have been tested as compared with normal stainless steel. Taking account of the limited time-length of environment with certain level of humidity and temperature range, the high resistant stainless steels will survive from SCC damage. In addition, the adhesion of salt from salty environment on the canister surface will be further limited with respect to the canister temperature and angle ... continued below

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Shirai, Koji; Tani, Jyunichi; Arai, Taku; Watatu, Masumi; Takeda, Hirofumi; Saegusa, Toshiari et al. October 1, 2008.

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Concrete cask storage has been implemented in the world. At a later stage of storage period, the containment of the canister may deteriorate due to stress corrosion cracking phenomena in a salty air environment. High resistant stainless steels against SCC have been tested as compared with normal stainless steel. Taking account of the limited time-length of environment with certain level of humidity and temperature range, the high resistant stainless steels will survive from SCC damage. In addition, the adhesion of salt from salty environment on the canister surface will be further limited with respect to the canister temperature and angle of the canister surface against the salty air flow in the concrete cask. Optional countermeasure against SCC with respect to salty air environment has been studied. Devices consisting of various water trays to trap salty particles from the salty air were designed to be attached at the air inlet for natural cooling of the cask storage building. Efficiency for trapping salty particles was evaluated. Inspection of canister surface was carried out using an optical camera inserted from the air outlet through the annulus of a concrete cask that has stored real spent fuel for more than 15 years. The camera image revealed no gross degradation on the surface of the canister. Seismic response of a full-scale concrete cask with simulated spent fuel assemblies has been demonstrated. The cask did not tip over, but laterally moved by the earthquake motion. Stress generated on the surface of the spent fuel assemblies during the earthquake motion were within the elastic region.

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  • 16th Pacific Basin Nuclear Conference (16PBNC),Aomori City, Japan,10/13/2008,10/18/2008

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  • Report No.: INL/CON-08-14592
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 950996
  • Archival Resource Key: ark:/67531/metadc927198

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  • October 1, 2008

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 1, 2016, 4:29 p.m.

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Shirai, Koji; Tani, Jyunichi; Arai, Taku; Watatu, Masumi; Takeda, Hirofumi; Saegusa, Toshiari et al. Research on Spent Fuel Storage and Transportation in CRIEPI (Part 2 Concrete Cask Storage), article, October 1, 2008; [Idaho]. (digital.library.unt.edu/ark:/67531/metadc927198/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.