SYMPOSIA PAPER Published: 01 January 1994
STP15134S

The Materials Dosimetry Reference Facility

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The Materials Dosimetry Reference Facility (MDRF) is a new reactor-driven reference neutron field for reactor dosimetry calibrations and methods validation. Basically, the facility design is a steel cylinder (15-cm o.d., 5-cm i.d.) mounted in the pool close to the core of the Ford Nuclear Reactor at the Phoenix Memorial Laboratory of the University of Michigan. Two spectrum options are available: one with a near-1/E distribution below 0.1 MeV, and the other with a 10B filtered spectrum that cuts off below 4 keV. Fast-neutron fluence rates (nominally 2.8×l011cm−2s−1, E>1 MeV) are established by means of neutron fluence transfer from the 252Cf Fission Neutron Irradiation Facility at NIST. Neutron fluences for sample irradiations (conventional maximum 2×l016n/cm2, E>1 MeV) will be certified to uncertainties of ±(5−6)%, lσ. The neutron spectrum in the facility is established on the basis of neutron transport calculations and spectral index measurements, the latter with threshold, low-energy activation, and fission reactions. The results of calculations and measurements are reported in this paper.

Author Information

Hawari, AI
The University of Michigan, Ann Arbor, MI
Venkataraman, R
The University of Michigan, Ann Arbor, MI
Fleming, R
The University of Michigan, Ann Arbor, MI
Charles, E
National Institute of Standards and Technology, Gaithersburg, MD
Grundl, J
National Institute of Standards and Technology, Gaithersburg, MD
McGarry, ED
National Institute of Standards and Technology, Gaithersburg, MD
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Developed by Committee: E10
Pages: 401–410
DOI: 10.1520/STP15134S
ISBN-EB: 978-0-8031-5281-6
ISBN-13: 978-0-8031-1899-7