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Title: Continuous Holdup Measurements with Silicon P-I-N Photodiodes

Abstract

We report on the behavior of silicon P-I-N photodiodes used to perform holdup measurements on plumbing. These detectors differ from traditional scintillation detectors in that no high-voltage is required, no scintillator is used (gamma and X rays are converted directly by the diode), and they are considerably more compact. Although the small size of the diodes means they are not nearly as efficient as scintillation detectors, the diodes' size does mean that a detector module, including one or more diodes, pulse shaping electronics, analog-to-digital converter, embedded microprocessor, and digital interface can be realized in a package (excluding shielding) the size of a pocket calculator. This small size, coupled with only low-voltage power requirement, completely solid-state realization, and internal control functions allows these detectors to be strategically deployed on a permanent basis, thereby reducing or eliminating the need for manual holdup measurements. In this paper, we report on the measurement of gamma and X rays from {sup 235}U and {sup 238}U contained in steel pipe. We describe the features of the spectra, the electronics of the device and show how a network of them may be used to improve estimates of inventory in holdup.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Oak Ridge Y-12 Plant, TN (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
795458
Report Number(s):
Y/DX-2494
TRN: US0201328
DOE Contract Number:  
AC05-00OR22800
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 May 2002
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; ANALOG-TO-DIGITAL CONVERTERS; PHOTODIODES; STEELS; PIPES; SI SEMICONDUCTOR DETECTORS; X-RAY DETECTION; GAMMA DETECTION; URANIUM 235; URANIUM 238; MATERIAL UNACCOUNTED FOR; NUCLEAR MATERIALS MANAGEMENT

Citation Formats

Bell, Z.W., Oberer, R.B., Williams, J.A., Smith, D.E., and Paulus, M.J. Continuous Holdup Measurements with Silicon P-I-N Photodiodes. United States: N. p., 2002. Web. doi:10.2172/795458.
Bell, Z.W., Oberer, R.B., Williams, J.A., Smith, D.E., & Paulus, M.J. Continuous Holdup Measurements with Silicon P-I-N Photodiodes. United States. doi:10.2172/795458.
Bell, Z.W., Oberer, R.B., Williams, J.A., Smith, D.E., and Paulus, M.J. Wed . "Continuous Holdup Measurements with Silicon P-I-N Photodiodes". United States. doi:10.2172/795458. https://www.osti.gov/servlets/purl/795458.
@article{osti_795458,
title = {Continuous Holdup Measurements with Silicon P-I-N Photodiodes},
author = {Bell, Z.W. and Oberer, R.B. and Williams, J.A. and Smith, D.E. and Paulus, M.J.},
abstractNote = {We report on the behavior of silicon P-I-N photodiodes used to perform holdup measurements on plumbing. These detectors differ from traditional scintillation detectors in that no high-voltage is required, no scintillator is used (gamma and X rays are converted directly by the diode), and they are considerably more compact. Although the small size of the diodes means they are not nearly as efficient as scintillation detectors, the diodes' size does mean that a detector module, including one or more diodes, pulse shaping electronics, analog-to-digital converter, embedded microprocessor, and digital interface can be realized in a package (excluding shielding) the size of a pocket calculator. This small size, coupled with only low-voltage power requirement, completely solid-state realization, and internal control functions allows these detectors to be strategically deployed on a permanent basis, thereby reducing or eliminating the need for manual holdup measurements. In this paper, we report on the measurement of gamma and X rays from {sup 235}U and {sup 238}U contained in steel pipe. We describe the features of the spectra, the electronics of the device and show how a network of them may be used to improve estimates of inventory in holdup.},
doi = {10.2172/795458},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 01 00:00:00 EDT 2002},
month = {Wed May 01 00:00:00 EDT 2002}
}

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