| dc.contributor.advisor |
Dr. David N McNelis, Committee Member |
en_US |
| dc.contributor.advisor |
Dr. John Franke, Committee Member |
en_US |
| dc.contributor.advisor |
Dr. Man-Sung Yim, Committee Chair |
en_US |
| dc.contributor.advisor |
Dr. Donald J. Dudziak, Committee Member |
en_US |
| dc.contributor.author |
Davis, Adam |
en_US |
| dc.date.accessioned |
2010-04-02T18:07:31Z |
|
| dc.date.available |
2010-04-02T18:07:31Z |
|
| dc.date.issued |
2007-12-07 |
en_US |
| dc.identifier.other |
etd-11072007-213713 |
en_US |
| dc.identifier.uri |
http://www.lib.ncsu.edu/resolver/1840.16/1790 |
|
| dc.description.abstract |
In radiation protection, photon buildup factors provide a convenient method for calculating dose and exposure response after various shielding configurations, as well as information about the behavior of radiation in these configurations. Though many situations call for multi-layer shields, few data bases and derived analytical formulas for photon buildup in multi-layer shields exist. This research develops buildup factors and an analytical fit to these for dual-layer shields of various materials.The photon buildup factors were calculated for two-layer shields of various combinations of lead, polyethylene, aluminum and stainless steel for thicknesses of 2-20 mean free paths using the discrete-ordinates code PARTISN. The Gauss-Lobatto S100 quadrature was used with a 244-energy-group structure and coupled photon and electron cross sections. These were then benchmarked for representative cases using MCNP5 and fit to a new analytical formula using Mathematica 6.0. |
en_US |
| dc.rights |
I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dis
sertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee.
I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I
retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
en_US |
| dc.subject |
Dual Layer Buildup Factors |
en_US |
| dc.subject |
Photon Buildup |
en_US |
| dc.subject |
Radiation Shielding |
en_US |
| dc.subject |
Radiation Protection |
en_US |
| dc.title |
Photon Buildup Factors in Laminated Dual-Layer Shields |
en_US |
| dc.degree.name |
MS |
en_US |
| dc.degree.level |
thesis |
en_US |
| dc.degree.discipline |
Nuclear Engineering |
en_US |
