Modal Analysis of Spent Fuel Cask for WWER-1000 Reactors

Azimfar, S.A; Kazemi, A.

Modal Analysis of Spent Fuel Cask for WWER-1000 Reactors

Document Type : Research Paper

Authors

S.A Azimfar

A. Kazemi

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

Abstract

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.

Highlights

“Description of fresh and spent fuel storage at balakovo NPP-definitions for safety calculation,” Russian Research Center "Kurchatov Institute", (April 2007).
ANSYS, Inc., “ANSYS users guide for revision 10.0,” ANSYS, Inc., PA, USA (2006).

Bechtel/Parsons Brinkerhoff, Inc. November 1995. Memorial Tunnel Fire Ventilation Test Program, Comprehensive Test Report, Prepared for Massachusetts Highway Department and Federal Highway Administration.

NRC Docket Number 71-9225. Legal Weight Truck Transport(LWT) Packaging Safety (2001).

Conceptual project “Multipurpose universal CERMET-based for transportation and temporary storage of SNF from power reactor,” (2006).

Project No 2693 of the International Science and Technology Center “Production and research of cast cermet based on stainless steel and dioxide of depleted uranium as applied to use of it as protective material in designs of casks for spent nuclear fuel and radioactive wastes,” (2006).

Keywords

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).
ANSYS, Inc., “ANSYS users guide for revision 10.0,” ANSYS, Inc., PA, USA (2006).

Bechtel/Parsons Brinkerhoff, Inc. November 1995. Memorial Tunnel Fire Ventilation Test Program, Comprehensive Test Report, Prepared for Massachusetts Highway Department and Federal Highway Administration.

NRC Docket Number 71-9225. Legal Weight Truck Transport(LWT) Packaging Safety (2001).

Conceptual project “Multipurpose universal CERMET-based for transportation and temporary storage of SNF from power reactor,” (2006).

Project No 2693 of the International Science and Technology Center “Production and research of cast cermet based on stainless steel and dioxide of depleted uranium as applied to use of it as protective material in designs of casks for spent nuclear fuel and radioactive wastes,” (2006).