Modal Analysis of Spent Fuel Cask for WWER-1000 Reactors

نوع مقاله: مقاله پژوهشی

نویسندگان

Nuclear Power Production and Development Co. of Irna, AEOI, P.O. Box: 19395-7484, Tehran - Iran

چکیده

The Spent Fuel Assemblies (SFAs) of WWER-1000 reactors are planned to be transported by special containers which are supposed to be designed in a manner to stand against vibrations and impacts in order to protect the spent fuel from any possible damage. The vibration opposition of these containers shall be far beyond the critical resonance, because the resonances about the natural frequency of the structure will cause the enhancement of its oscillation range and may end with its disintegration. Determination of the amounts of natural frequencies and their mode shape can be achieved by vibration analyzing methods. The amount of the natural frequency of any structure crucially depends on its shape, material and lean points as well as the amount of the loads and the type of these loads. Due to the fact that the Spent Fuel Casks used for transportation in nuclear power plants in Russian Federation are TK-13 type and the pieces of information released are negligible, the scientists in Russia are working on the design and analysis of a new type made up of composite Material. In the presented paper the cask of spent fuel of TK-13 is modeled by ANSYS® 10.0 and ten natural frequency modes have been calculated, followed by the comparison of this result with the composite cask.

کلیدواژه‌ها


عنوان مقاله [English]

Modal Analysis of Spent Fuel Cask for WWER-1000 Reactors

نویسندگان [English]

  • S.A Azimfar
  • A. Kazemi
Nuclear Power Production and Development Co. of Irna, AEOI, P.O. Box: 19395-7484, Tehran - Iran
چکیده [English]

The Spent Fuel Assemblies (SFAs) of WWER-1000 reactors are planned to be transported by special containers which are supposed to be designed in a manner to stand against vibrations and impacts in order to protect the spent fuel from any possible damage. The vibration opposition of these containers shall be far beyond the critical resonance, because the resonances about the natural frequency of the structure will cause the enhancement of its oscillation range and may end with its disintegration. Determination of the amounts of natural frequencies and their mode shape can be achieved by vibration analyzing methods. The amount of the natural frequency of any structure crucially depends on its shape, material and lean points as well as the amount of the loads and the type of these loads. Due to the fact that the Spent Fuel Casks used for transportation in nuclear power plants in Russian Federation are TK-13 type and the pieces of information released are negligible, the scientists in Russia are working on the design and analysis of a new type made up of composite Material. In the presented paper the cask of spent fuel of TK-13 is modeled by ANSYS® 10.0 and ten natural frequency modes have been calculated, followed by the comparison of this result with the composite cask.
 

کلیدواژه‌ها [English]

  • Natural Frequency
  • Vibration Mode
  • WWER-1000 Reactor
  • Critical Resonance
  • Spent Fuel Transportation Cask
  • Composite
“Description of fresh and spent fuel storage at balakovo NPP-definitions for safety calculation,” Russian Research Center "Kurchatov Institute", (April 2007).

 

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