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Dec 2007

Volume 78, Issue 12, Articles (12xxxx)

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Rev. Sci. Instrum. 78, 121301 (2007); http://dx.doi.org/10.1063/1.2821148 (15 pages)

A. Westphalen, M.-S. Lee, A. Remhof, and H. Zabel
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An apparatus for the study of high temperature water radiolysis in a nuclear reactor: Calibration of dose in a mixed neutron/gamma radiation field

Eric J. Edwards, Paul P. H. Wilson, Mark H. Anderson, Stephen P. Mezyk, Simon M. Pimblott, and David M. Bartels

Rev. Sci. Instrum. 78, 124101 (2007); http://dx.doi.org/10.1063/1.2814167 (11 pages) | Cited 1 time

Online Publication Date: 12 December 2007

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The cooling water of nuclear reactors undergoes radiolytic decomposition induced by gamma, fast electron, and neutron radiation in the core. To model the process, recombination reaction rates and radiolytic yields for the water radical fragments need to be measured at high temperature and pressure. Yields for the action of neutron radiation are particularly hard to determine independently because of the beta/gamma field also present in any reactor. In this paper we report the design of an apparatus intended to measure neutron radiolysis yields as a function of temperature and pressure. A new methodology for separation of neutron and beta/gamma radiolysis yields in a mixed radiation field is proposed and demonstrated.
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28.41.Fr Reactor coolants, reactor cooling, and heat recovery
28.41.Ak Theory, design, and computerized simulation
61.80.Hg Neutron radiation effects
87.53.Bn Dosimetry/exposure assessment
82.50.Kx Processes caused by X-rays or γ-rays
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