Development of an in-core neutron monitoring system and characterization of the University of Texas at Austin TRIGA reactor steady-state neutron flux variations for use with Neutron Activation Analysis

dc.contributor.advisorHaas, Derek Anderson, 1981-
dc.creatorStokley, Matthew Brian
dc.creator.orcid0000-0002-4066-2303
dc.date.accessioned2018-10-19T23:28:47Z
dc.date.available2018-10-19T23:28:47Z
dc.date.created2018-05
dc.date.issued2018-05-02
dc.date.submittedMay 2018
dc.date.updated2018-10-19T23:28:48Z
dc.description.abstractThe pneumatic NAA facility within The University of Texas at Austin is widely used for the measurement of trace elemental concentrations. It has been shown for extremely short duration NAA irradiations, sample activation measurements can vary by up to 12% from normalized values. The typical university research reactor’s external neutron monitoring instruments are unable to detect small, localized variations in neutron population likely resulting in the observed error. The primary method to reduce this uncertainty is to irradiate traceable flux monitor samples in addition to the experimental samples to be analyzed. This method doubles the required sample prep, measurement, and analysis effort. An in-core neutron monitoring system was designed and installed adjacent to the pneumatic NAA sample system terminus to track these localized fluctuations. This design consists of a miniature in-core fission chamber fitted through the upper grid plate of the reactor core. The system is controlled by a NI LabVIEW data logging application. This system provides the capability of monitoring sample irradiance in real-time. In preliminary testing, the system was able to track short irradiation NAA sample variance to within 3% of normalized values. Thus, a significant reduction in the uncertainty of NAA measurements for trace elemental concentrations is achievable.
dc.description.departmentMechanical Engineering
dc.format.mimetypeapplication/pdf
dc.identifierdoi:10.15781/T2416TJ4Z
dc.identifier.urihttp://hdl.handle.net/2152/69096
dc.language.isoen
dc.subjectNeutron flux monitoring
dc.subjectNeutron Activation Analysis
dc.subjectNeutron flux variance
dc.titleDevelopment of an in-core neutron monitoring system and characterization of the University of Texas at Austin TRIGA reactor steady-state neutron flux variations for use with Neutron Activation Analysis
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentMechanical Engineering
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Engineering
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
STOKLEY-THESIS-2018.pdf
Size:
6.13 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.45 KB
Format:
Plain Text
Description:
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.84 KB
Format:
Plain Text
Description: