Doctor of Philosophy / Department of Mechanical and Nuclear Engineering / Douglas S. McGregor / A Micro-Pocket Fission Detector (MPFD) is a miniaturized type of fission chamber developed for use inside a nuclear reactor. Their unique design allows them to be located
between or even inside fuel pins while being built from materials which give them an operational lifetime comparable to or exceeding the life of the fuel. While other types of neutron detectors have been made for use inside a nuclear reactor, the MPFD is the first neutron detector which can survive sustained use inside a nuclear reactor while providing a real-time measurement of the neutron flux.
This dissertation covers the deployment of MPFDs as a large three-dimensional array
inside the Kansas State University TRIGA Mark-II Nuclear Reactor for real-time neutron
flux measurements. This entails advancements in the design, construction, and packaging
of the Micro-Pocket Fission Detector Triads with incorporated Thermocouple, or MPFD[superscript]3-T. Specialized electronics and software also had to be designed and built in order to make a functional system capable of collecting real-time data from up to 60 MPFD[superscript]3-Ts, or 180 individual MPFDs and 60 thermocouples. Design of the electronics required the
development of detailed simulations and analysis for determining the theoretical response of the detectors and determination of their size.
The results of this research shows that MPFDs can operate for extended times inside a nuclear reactor and can be utilized toward the use as distributed neutron detector arrays for advanced reactor control systems and power mapping. These functions are critical for continued gains in efficiency of nuclear power reactors while also improving safety through relatively inexpensive redundancy.
| Identifer | oai:union.ndltd.org:KSU/oai:krex.k-state.edu:2097/13672 |
| Date | January 1900 |
| Creators | Ohmes, Martin Francis |
| Publisher | Kansas State University |
| Source Sets | K-State Research Exchange |
| Language | en_US |
| Detected Language | English |
| Type | Dissertation |
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