Development of a neutron/. gamma. ray radiation monitor

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6050482

Korsah, K J

Personnel radiation monitoring is essential to the operation of any nuclear facility and work in this area continues to strive for an accurate determination of personnel dose. In particular recent attention has been focused upon the need to improve the accuracy of neutron dosimetry, mainly because of their high Relative Biological Effectiveness. In this work the feasibility of using the NE-213 liquid scintillation detector as an efficient neutron/..gamma.. ray radiation monitor is demonstrated. Derivative method spectrum unfolding used in MATXUF for on-line analysis of fast neutron spectra has also been applied to real time ..gamma.. spectrum unfolding (MATXUF2), making possible simultaneous on-line monitoring of both fast neutrons and gammas. To eliminate the negative fluxes in the unfolded ..gamma.. spectra created by the photopeak-Compton edge combination in the plateau portion of the knee response, correcting equations using a linearized approximation to the electron recoil spectrum has been developed and incorporated in the MATXUF2 unfolding code. A neutron/..gamma.. ray discriminator based on the method of Adams and White but using two Analog-To-Digital Converters (ADC's) similar to the design of Morris et al has also been designed and its performance evaluated by using it in combination with MATXUF and MATXUF2 to unfold neutron and ..gamma.. ray spectra for some standard sources and filters. Finally suggestions are given for the incorporation of the software and hardware into a single unit micro processor-based instrument for real time neutron/..gamma.. ray dose and/or spectral measurements.

• Research Organization: Missouri Univ., Columbia (USA)
• OSTI ID: 6050482
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
GAMMA DOSIMETRY
LIQUID SCINTILLATION DETECTORS
ON-LINE SYSTEMS
NEUTRON DOSIMETRY
FEASIBILITY STUDIES
REAL TIME SYSTEMS
SPECTRA UNFOLDING
DATA PROCESSING
DOSIMETRY
MEASURING INSTRUMENTS
PROCESSING
RADIATION DETECTORS
SCINTILLATION COUNTERS
440102* - Radiation Instrumentation- Radiation Dosemeters