DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fission meter and neutron detection using poisson distribution comparison

Abstract

A neutron detector system and method for discriminating fissile material from non-fissile material wherein a digital data acquisition unit collects data at high rate, and in real-time processes large volumes of data directly into information that a first responder can use to discriminate materials. The system comprises counting neutrons from the unknown source and detecting excess grouped neutrons to identify fission in the unknown source. Comparison of the observed neutron count distribution with a Poisson distribution is performed to distinguish fissile material from non-fissile material.

Inventors:
;
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1459003
Patent Number(s):
10001571
Application Number:
14/515,321
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Oct 15
Country of Publication:
United States
Language:
English

Citation Formats

Rowland, Mark S., and Snyderman, Neal J. Fission meter and neutron detection using poisson distribution comparison. United States: N. p., 2018. Web.
Rowland, Mark S., & Snyderman, Neal J. Fission meter and neutron detection using poisson distribution comparison. United States.
Rowland, Mark S., and Snyderman, Neal J. Tue . "Fission meter and neutron detection using poisson distribution comparison". United States. https://www.osti.gov/servlets/purl/1459003.
@article{osti_1459003,
title = {Fission meter and neutron detection using poisson distribution comparison},
author = {Rowland, Mark S. and Snyderman, Neal J.},
abstractNote = {A neutron detector system and method for discriminating fissile material from non-fissile material wherein a digital data acquisition unit collects data at high rate, and in real-time processes large volumes of data directly into information that a first responder can use to discriminate materials. The system comprises counting neutrons from the unknown source and detecting excess grouped neutrons to identify fission in the unknown source. Comparison of the observed neutron count distribution with a Poisson distribution is performed to distinguish fissile material from non-fissile material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {6}
}

Works referenced in this record:

Count logic circuit
patent, July 1978


Subthreshold neutron interrogator for detection of radioactive materials
patent, May 1980


Determining fissile content of nuclear fuel elements
patent, October 1980


Measurement of radionuclides in waste packages
patent, October 1986


Advanced electronics for faster time-correlation analysis of pulse sequences
patent, December 2001


Fissile material detector
patent, January 2002


Fission meter
patent, April 2012


Detection of neutrons and sources of radioactive material
patent-application, May 2005


Absolute nuclear material assay
patent-application, April 2006


Physical description of nuclear materials identification system (NMIS) signatures
journal, August 2000

  • Mihalczo, J. T.; Mullens, J. A.; Mattingly, J. K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 450, Issue 2-3, p. 531-555
  • https://doi.org/10.1016/S0168-9002(00)00304-1

Direct neutron spectrum measurement to validate natZr(n,2n) reaction cross-section at 14MeV
journal, June 2009


Probabilities of Prompt-Neutron Emission from Spontaneous Fission
journal, February 1956


Application Guide to Neutron Multiplicity Counting
report, November 1998