Title: Investigation of the 240Pu(n,f) reaction at n TOF/EAR2 facility in the 9 meV - 6 MeV range
Authors: STAMATOPOULOS A.TSINGANIS A.COLONNA N.KOKKORIS M.VLASTOU R.DIAKAKI M.ZUGEC P.SCHILLEBEECKX PETERGUNSING F.SABATE-GILARTE MBARBAGALLO MABERLE O.ANDRZEJEWSKI J.AUDOUIN L.BECARES V.BACAK M.BALIBREA J.BARROS S.BECVAR F.BEINRUCKER C.BELLONI F.BERTHOUMIEUX E.BILLOWES J.BOSNAR D.BRUGGER M.CAAMANO M.LO-MEO S.CALVIÑO F.CALVIANI M.CANO-OTT D.CERUTTI F.CHIAVERI E.CORTÉS G. P.CORTES-GIRALDO M. A.COSENTINO LUIGIDAMONE L.DEO K.DOMINGO-PARDO C.DRESSLER R.DUPONT E.DURAN I.FERNÁNDEZ-DOMÍNGEZ B.FERRARI A.FERREIRA P.FINOCCHIARO PAOLOFROST R.FURMAN V.GÖBEL K.GARCIA A. R.GHEORGHE I.GLODARIU T.GONCALVES I. F.GONZÁLEZ-ROMERO E.GOVERDOVSKI A.GRIESMAYER E.GUERRERO C.HARADA H.HEFTRICH T.HEINITZ S.HERNANDEZ-PRIETO A.HEYSE JANJENKINS D. G.JERICHA E.KAPPELER F.KADI Y.KATABUCHI T.KAVRIGIN P.KETLEROV V.KHRYACHKOV VITALIKIMURA A.KIVEL N.KNAPOVA I.KRTICKA M.LEAL-CIDONCHA E.LEDERER-WOODS CLAUDIALEEB H.LERENDEGUI-MARCO J.LICATA M.LOSITO R.MACINA D.MARGANIEC J.MARTÍNEZ T.MASSIMI C.MASTINU P.MASTROMARCO M.MATTEUCCI F.MENDOZA E.MENGONI A.MILAZZO P.M.MINGRONE F.MIREA M.MONTESANO S.MUSUMARRA A.NOLTE R.PALOMO-PINTO F. R.PARADELA DOBARRO CARLOSPATRONIS N.PAVLIK A.PERKOWSKI J.PLOMPEN ARJANPORRAS I.PRAENA J.QUESADA J.RAUSCHER T.REIFARTH R.RIEGO-PEREZ A.ROBLES M. S.RUBBIA C.RYAN J.SAXENA A.SCHMIDT S.SCHUMANN D.SEDYSHEV P.SMITH A. G.SURYANARAYANA S. V.TAGLIENTE G.TAIN J.L.TARIFENO-SALDIVIA A.TASSAN-GOT L.VALENTA S.VANNINI G.VARIALE V.VAZ P.VENTURA A.VLACHOUDIS V.WALLNER A.WARREN S.WEIGAND M.WEISS C.WRIGHT T. J.
Citation: PHYSICAL REVIEW C vol. 102 p. 014616
Publisher: AMER PHYSICAL SOC
Publication Year: 2020
JRC N°: JRC120978
ISSN: 2469-9985 (online)
URI: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.102.014616
https://publications.jrc.ec.europa.eu/repository/handle/JRC120978
DOI: 10.1103/PhysRevC.102.014616
Type: Articles in periodicals and books
Abstract: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue, is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimisation and improvement of safety margins of such systems. One such case is 240Pu, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the 240Pu(n,f) cross section was previously attempted at the CERN n TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1 the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high alpha-activity of the fission foils, therefore the measurement could not be successfully completed. The study of the 240Pu(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight-path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analysed with an optimised pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology and other corrections were estimated via Monte Carlo simulations of the experimental setup. This new measurement of the 240Pu(n,f) cross section yielded data from 9 meV up to 6 MeV incident neutron energy and fission resonance kernels were extracted up to 10 keV.
JRC Directorate:Nuclear Safety and Security

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