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Title

SIMULATING THE KATANA EFFECT MONTE CARLO NEUTRON TRANSPORT COMBINED WITH FINITE ELEMENT ANALYSIS TO CALCULATE NEGATIVE REACTIVITY DUE TO DUCT-BOWING

Organization

Department: Nuclear Eng'g & Health Physics

University: Idaho State University College: Science & Engineering Department: Nuclear Eng'g & Health Physics 23

Document Attachments

Resource	Length	Width	Thickness
Paper	0	0	0

Specimen Elements

City

Pocatello

Coverage

Unknown to Unknown

Creator

Edward Lum

Publisher

Idaho State University

Type

Dissertation

Is Complete

No

Date Published

1/31/2018

Archive

digital

City: Pocatello

Degree

Doctorate

Document Attachments

Abstracts

The research presented here focuses on simulating the duct-bowing reactivity coefficient for EBR-II run 138B. Quantification of duct-bowing has been a persistent problem since liquid metal fast reactors were first designed and operated. Simulation has been difficult because the level-of-detail required to fully simulate this effect has exceeded most computing capabilities. The new method shown here utilizes a finite element analysis code called ANSYS to analysis the thermal and structural components. The thermal expansion is calculated from temperature and power data. The displacement data are placed into an MCNP model of EBR-II run 138B where neutrons are passed through the simulated bowed ducts. Multiple MCNP files were created such that a set of changes in keff were compiled and a temperature coefficient was calculated. The method was validated using GODIVA-IV as a benchmark. The values calculated for the GODIVA-IV thermal expansion reactivity coefficient agreed with reported values.