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LUND UNIVERSITY LIBRARIES

Improved methodology for postulated fuel handling accident

Fagerberg, Max LU (2020) In TFHF-5000 FHL820 20201
Department of Construction Sciences
Solid Mechanics
Abstract
This report presents a suggestion of an improved method for evaluation of a fuel handling accidents. Using a 3D FE-model and ANSYS LS-DYNA EXT the structural analysis is carried out. Importing geometry from SpaceClaim and simplifying it creates the geometry used in this analysis. By modifying the weight of the parts to resemble the real world product and coupling it with Ramberg-Osgood used as the material model the computational model will be similar to the real assemblies. Four different load cases are suggested to be examined. Together they analyse the effect of tilt angle and distribution of energy across multiple assemblies.
The results show that higher strain might occur in the top of the impacted assembly than previously thought.... (More)
This report presents a suggestion of an improved method for evaluation of a fuel handling accidents. Using a 3D FE-model and ANSYS LS-DYNA EXT the structural analysis is carried out. Importing geometry from SpaceClaim and simplifying it creates the geometry used in this analysis. By modifying the weight of the parts to resemble the real world product and coupling it with Ramberg-Osgood used as the material model the computational model will be similar to the real assemblies. Four different load cases are suggested to be examined. Together they analyse the effect of tilt angle and distribution of energy across multiple assemblies.
The results show that higher strain might occur in the top of the impacted assembly than previously thought. It also shows tendencies for the falling assembly to glance of the impacted assembly and continue until it affects another assembly.
Several improvements on this model can be done. The implementation of birth and death and combining the split assemblies into one singe calculation. (Less)
Popular Abstract
There have never been big studies made on accidents with nuclear fuel rods from great heights while inside a reactor at Westinghouse. They have only been done on fuel assemblies at a max height of 1 meter. So what happens if one entire fuel assembly is dropped from 6 meters onto another fuel assembly?
Please use this url to cite or link to this publication:
author
Fagerberg, Max LU
supervisor
organization
course
FHL820 20201
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
ANSYS LS-DYNA, FEM, nuclear fuel, solid mechanics
publication/series
TFHF-5000
report number
TFHF-5213
language
English
id
9030676
date added to LUP
2020-10-09 12:12:23
date last changed
2020-10-09 12:12:23
@misc{9030676,
  abstract     = {{This report presents a suggestion of an improved method for evaluation of a fuel handling accidents. Using a 3D FE-model and ANSYS LS-DYNA EXT the structural analysis is carried out. Importing geometry from SpaceClaim and simplifying it creates the geometry used in this analysis. By modifying the weight of the parts to resemble the real world product and coupling it with Ramberg-Osgood used as the material model the computational model will be similar to the real assemblies. Four different load cases are suggested to be examined. Together they analyse the effect of tilt angle and distribution of energy across multiple assemblies. 
The results show that higher strain might occur in the top of the impacted assembly than previously thought. It also shows tendencies for the falling assembly to glance of the impacted assembly and continue until it affects another assembly. 
Several improvements on this model can be done. The implementation of birth and death and combining the split assemblies into one singe calculation.}},
  author       = {{Fagerberg, Max}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{TFHF-5000}},
  title        = {{Improved methodology for postulated fuel handling accident}},
  year         = {{2020}},
}