M. Štefánik*), P. Bém, M. Honusek, K. Katovský, M. Majerle, J. Novák, and E. Šimečková

AER Working Group F – AER Working Group F – „„Spent Fuel Spent Fuel Transmutation“Transmutation“ and INPRO IAEA and INPRO IAEA CollaborativeCollaborative

Project SYNERGIESProject SYNERGIES

*) 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: milan.stefanik@fjfi.cvut.cz

Goals of experiments Motivation Experimental equipment

◦ D2O-target station Activation method Measurement of p-D2O neutron spectrum

◦ Specification of experiments, set-up, results MCNPX calculations Conclusion

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 2

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

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 3

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

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 4

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

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 5

Source of white neutron spectrum Mean energy of 14 MeV, spectrum

extending to 33 MeV In negative ion mode of acceleration

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 6

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 7

Measurement of low-energy part of spectra (En < 4 MeV)

Two irradiation position Field deformed by samples and devices

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 8

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

Nuclear γ-spectrometry technique

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 9

21 activation reactions observed Spectrum unfolded by modified SAND-II

code EAF-2007 library, MCNPX input spectrum

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 10

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

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 11

Dosimetry foil activation method used for IFMIF-like neutron spectrum determination.

Spectral flux for energies less than 4 MeV relatively well known now.

April 21, 2023The Neutron Spectrum Determination of p-D2O Generator

by the Dosimetry-Foil Method 12