The 235U Prompt Fission Neutron Spectrum in the BR1 Reactor at SCK•CEN
SCK•CEN, Boeretang 200, 2400 Mol, Belgium
a Corresponding author: email@example.com
Published online: 3 February 2016
The BR1 research reactor at SCK•CEN has a spherical cavity in the graphite above the reactor core. In this cavity an accurately characterised Maxwellian thermal neutron field is present. Different converters can be loaded in the cavity in order to obtain other types of neutron (and gamma) irradiation fields. Inside the so-called MARK III converter a fast 235U(n,f) prompt fission neutron field can be obtained. With the support of MCNP calculations, irradiations in MARK III can be directly related to the pure 235U(n,f) prompt fission neutron spectrum. For this purpose MARK III spectrum averaged cross sections for the most relevant fluence dosimetry reactions have been determined. A calibration factor for absolute measurements has been determined applying activation dosimetry following ISO/IEC 17025 standards.
© Owned by the authors, published by EDP Sciences, 2016
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