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Radiation Protection Dosimetry 2004 110(1-4):517-521; doi:10.1093/rpd/nch383
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Radiation Protection Dosimetry Vol. 110 Nos. 1-4 © Oxford University Press 2004; all rights reserved

Neutron measurements in the Vandellòs II nuclear power plant with a Bonner sphere system

F. Fernández1,*, M. Bakali2, M. Tomás1, H. Muller2 and J. L. Pochat2

1 Grup de Física de les Radiacions, Universitat Autónoma de Barcelona, Edifici Cc E-08193 Bellaterra, Spain
2 Institut de Radioprotection et de Sûreté Nucléaire, Direction de la Radioprotection de l'Homme, IRSN/DRPH, BP 3, 13115 Saint Paul-Lez-Durance Cedex, France

* Corresponding author: Francisco.Fernandez{at}uab.es

In some Spanish nuclear power plants of pressurised water reactor (PWR) type, albedo thermoluminescence dosemeters are used for personal dosimetry while survey meters, based on a thermal-neutron detector inside a cylindrical or spherical moderator, are used for dose rate assessment in routine monitoring. The response of both systems is highly dependent on the energy of the existing neutron fields. They are usually calibrated by means of ISO neutron sources with energy distributions quite different from those encountered at these installations. Spectrometric measurements with a Bonner sphere system (BSS) allow us to determine the reference dosimetric values. The UAB group, under request from the National Coordinated Research Action, was in charge of characterising the neutron fields and evaluating the response of personal dosemeters at several measurement points inside the containment building of the Catalan Nuclear Power Plant Vandellòs II. The neutron fields were characterised at five places using the UAB-BSS and a home made unfolding code called MITOM. The results obtained confirm the presence of low-energy components in the neutron field in most of the selected points. Moreover, we have found no influence of the nuclear fuel burning on the shape of the spectrum.


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 Radiat Prot DosimetryHome page
F. Fernandez, C. Domingo, K. Amgarou, T. Bouassoule, and M. J. Garcia
Neutron measurements in Spanish nuclear power plants with a Bonner sphere spectrometer system
Radiat Prot Dosimetry, August 1, 2007; 126(1-4): 355 - 360.
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