A SCAN A SOURCE MATRIX CORRECTION TECHNIQUE FOR USE WITH A RECONFIGURABLE PASSIVE NEUTRON PLUTONIUM ASSAY SYSTEM

Authors
ARMITAGE BH CHARD PMJ CROFT S LAMBERT KP LLOYD DJ
Citation
Bh. Armitage et al., A SCAN A SOURCE MATRIX CORRECTION TECHNIQUE FOR USE WITH A RECONFIGURABLE PASSIVE NEUTRON PLUTONIUM ASSAY SYSTEM, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 354(2-3), 1995, pp. 522-526
Citations number
10
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
354
Issue
2-3
Year of publication
1995
Pages
522 - 526
Database
ISI
SICI code
0168-9002(1995)354:2-3<522:ASASMC>2.0.ZU;2-V
Abstract
We have developed a mobile, reconfigurable plutonium assay system cons isting of eight identical passive neutron counting modules that can be used individually or in combination, allowing almost any Pu-bearing c ontainer to be assayed. Each module consists of three He-3 proportiona l counters embedded in a polyethylene moderator. The detectors are lin ked to a standard coincidence analyser, which measures the Totals coun trate, the Reals plus Accidentals countrate and the Accidentals coinci dence countrate. This paper describes the principal characteristics of the assay system and reports on a feasibility study aimed at developi ng a novel matrix compensation method for inhomogeneous matrices in dr ummed waste. The method consists of scanning a Cf-252 source up the ou tside of the drums and relating the measured countrate to the detectio n efficiency for Pu within.