Neutron flux characterization of the Kansas State University TRIGA Mark II’s Northeast Beam Port

A high-resolution, multi-dimensional flux characterization was performed for the Kansas State University TRIGA Mark II’s Northeast Beam Port for the purpose of informing future experimental work, such as detector characterization, done using the beam. First, the Beam Port geometry was added to the existing reactor model. Then the in-core fission rates were tallied using MCNP to provide a source term for the beam transport. The program ADVANTG was used for automated generation of weight windows to accelerate the convergence of tallies in the beam port model. A tally was then collected at the end of the beam port and results are presented. Results from this tally were used to produce simulated responses and response functions for two detectors: a gold foil-based passive spectrometer and a standard set of Bonner Spheres. An experiment was conducted with both measurement devices to obtain responses. These measurements showed decent shape agreement and a small magnitude bias relative to the simulated results. Finally, the measurements, simulated flux, and response functions were used to unfold a final set of spectra using three different unfolding techniques. The Doroshenko directed divergence and Gravel (modified Sand-II) methods produced physically-realistic spectra which successfully fit the measured data, while MAXED did not.

Grantor dc:publisher

Kansas State University

Year dc:date.issued

2019

Author dc:creator

• Boyington, John Charles

• Neutron Spectrometry Beam TRIGA

Statement dc:rights

• © the author. This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/2097/40093

OAI identifier oai:identifier

oai:krex.k-state.edu:2097/40093