Results of field trials using the NPL simulated reactor neutron field facility.

Abstract:

:The NPL simulated reactor neutron field facility provides neutron spectra similar to those found in the environs of UK gas-cooled reactors. Neutrons are generated by irradiating a thick lithium-alloy target with monoenergetic protons between 2.5 and 3.5 MeV (depending on the desired spectrum), and then moderated by a 40-cm diameter sphere of heavy water. This represents an extremely soft workplace field, with a mean neutron energy of 25 keV and, more significantly, a mean fluence to ambient dose equivalent conversion coefficient of the order of 20 pSv cm(2), approximately 20 times lower than those of the ISO standard calibration sources (252)Cf and (241)Am-Be. Results of field trials are presented, including readings from neutron spectrometers, personal dosimeters (active and passive) and neutron area survey meters, and issues with beam monitoring are discussed.

journal_name

Radiat Prot Dosimetry

authors

Taylor GC,Thomas DJ,Bennett A

doi

10.1093/rpd/ncm018

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

89-92

issue

1-4

eissn

0144-8420

issn

1742-3406

pii

ncm018

journal_volume

126

pub_type

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