SEDL / STP / STP1550-EB / STP155020120039

The Neutron Standard Fields at the BR1 Reactor at SCK•CEN

Wagemans, J.
SCK•CEN,

Malambu, E.
SCK•CEN,

Borms, L.
SCK•CEN,

Pages: 9    Published: Aug 2012

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Abstract

The BR1 research reactor at SCK•CEN is characterized by a wide variety of irradiation possibilities, a large reactor core, and strong flexibility in its operation. A full MCNP model of BR1 has been recently developed in order to complement the results that can be obtained from activation dosimetry. After a general presentation of the reactor, this paper pays particular attention to its standard ²³⁵U(n,f) fast neutron field MARK III. This irradiation field is a useful tool for integral measurements and for detector calibrations. With the support of MCNP calculations, irradiations in MARK III can be directly referred to the pure ²³⁵U(n,f) fast neutron spectrum.