Doctoral Dissertations

Abstract

"By utilizing a geometrically centered pulsed source internal to a large (B2g) ≈ 0.002) cylindrical H₂O system, the neutron flux was measured as a function of position and time. A least square fit of the data yielded the fundamental and five higher decay constants and amplitudes of the thermal neutron flux. Symmetrical and enhanced neutron densities were obtained as a result of the internal source. Long waiting times were unnecessary and data acquisition was accelerated.

The decay constants were found to be independent of position, pulse width, counting time and rates, method of normalization, or waiting time. The decay constants were related to the bucklings by an analysis of the amplitudes without variance of the size of the system.

This method gives Σav = (4759 ± 54) sec⁻¹, Do = (3.7084 ± 0.0897) x 10⁴ cm²/sec, L = (2.79 ± 0.05) cm, σaH = (323 ± 3) mb, and a mean neutron lifetime of (210 ± 2.4) µsec"--Abstract, page ii.

Advisor(s)

Edwards, D. R.

Committee Member(s)

Bolon, Albert E., 1939-2006
Webb, William H.
Penico, Anthony J., 1923-2011
Tsoulfanidis, Nicholas, 1938-

Department(s)

Nuclear Engineering and Radiation Science

Degree Name

Ph. D. in Nuclear Engineering

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

viii, 69 pages

Note about bibliography

Includes bibliographical references (pages 42-43).

Rights

© 1970 Harold David Hollis, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Pressurized water reactors
Pulsed neutron techniques
Thermal neutrons
Cylindrical probabilities

Thesis Number

T 2393

Print OCLC #

6022498

Electronic OCLC #

854567830

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