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M. Štefánik*), P. Bém, M. Honusek, K. Katovský,
M. Majerle, J. Novák, and E. Šimečková
*)
Department of Nuclear Reactions NPI ASCR, pri, 250 68 Řež, Czech Republic
Department of Nuclear Reactors FNSPE CTU, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
E-mail: [email protected]
AER Working Group F – „Spent Fuel Transmutation“ and
INPRO IAEA Collaborative Project SYNERGIES
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Goals of experiments
Motivation
Experimental equipment
◦ D2O-target station
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Activation method
Measurement of p-D2O neutron spectrum
◦ Specification of experiments, set-up, results
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MCNPX calculations
Conclusion
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
2
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Neutron spectrum determination of p-D2O
generator
◦ Specification of neutron field characteristic in low
energy range
◦ MCNPX model of heavy water target for direct
neutron beam
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
3
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IFMIF-like neutron spectrum simulation
utilizing the NPI Cyclotron U-120M and NG-2
generator
Application of simulated IFMIF neutron field
for testing Eurofer
Need for knowledge of neutron spectrum in
whole energy range including the low energy
part
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
4
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International Fusion Material Irradiation Facility
Accelerator driven neutron source
Source reaction: d(40 MeV) + Li
Spectrum mean energy of 14 MeV
Testing of materials for fusion reactors
Deuteron beam
Neutron beam
Liquid Li
Chamber with samples
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
5
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Source of white neutron spectrum
Mean energy of 14 MeV, spectrum extending
to 33 MeV
In negative ion mode of acceleration
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
6
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16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
7
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Measurement of low-energy part of spectra
(En < 4 MeV)
Two irradiation position
Field deformed by samples and devices
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
8
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Proton (36 MeV) beam current of 8.4 µA
7 types of activation materials (Mn, Y, Mo, In,
Lu, Cd and Au)
◦ From thermal to fast region
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Nuclear γ-spectrometry technique
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
9
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21 activation reactions observed
Spectrum unfolded by modified SAND-II code
EAF-2007 library, MCNPX input spectrum
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
10
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Parallel proton beam (Ep = 36 MeV)
D2O layer, Si and PE plate
Nuclear data library: LA-150h, ENDF/B-VII
Input spectrum for SAND-II code
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
11
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Dosimetry foil activation method used for
IFMIF-like neutron spectrum determination.
Spectral flux for energies less than 4 MeV
relatively well known now.
16 March 2015
The Neutron Spectrum Determination of p-D2O Generator
by the Dosimetry-Foil Method
12
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