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Analysis of a hypothetical dropped spent nuclear fuel shipping cask impacting a floor mounted crush pad
| 题名： | Analysis of a hypothetical dropped spent nuclear fuel shipping cask impacting a floor mounted crush pad |
| 作者： | Hawkes, B. D.; Uldrich, E. D. |
| 关键词： | Spent Fuel Casks##Finite Element Method##Impact Tests##Fuel Storage Pools##Materials Handling##Accidents##Computerized Simulation##Foams##Shock Absorbers##Meetings##EDB/420204##EDB/050900##EDB/054000## |
| 摘要： | A crush pad has been designed and analyzed to absorb the kinetic energy of a hypothetically dropped spent nuclear fuel shipping cask into a 44-ft. deep cask unloading pool at the Idaho Chemical Processing Plant. The 110-ton Large Cell Cask was assumed to be accidentally dropped onto the parapet of the unloading pool, causing the cask to tumble through the pool water and impact the floor mounted crush pad with the cask's top corner. The crush pad contains rigid polyurethane foam, which was modeled in a separate computer analysis to simulate the manufacturer's testing of the foam and to determine the foam's stress and strain characteristics. This computer analysis verified that the foam was accurately represented in the analysis to follow. A detailed non- linear, dynamic finite element analysis was then performed on the crush pad and adjacent pool structure to assure that a drop of this massive cask does not result in unacceptable damage to the storage facility. Additionally, verification was made that the crush pad adequately protects the cask from severe impact loading. At impact, the cask has significant vertical, horizontal and rotational velocities. The crush pad absorbs much of the energy of the cask through plastic deformation during primary and secondary impacts. After the primary impact with the crush pad, the cask still has sufficient energy to rebound and rotate until it impacts the pool wall. An assessment is made of the damage to the crush pad and pool wall and of the impact loading on the cask. |
| 总页数： | 9 |
| 报告类型： | 科技报告 |
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