Measurement of the fission yield of 136Cs in the 239Pu(nth,f) reaction

Abdelaziz Chebboubi; David Bernard; Vanessa Vallet; Grégoire Kessedjian; Olivier Méplan; Yung Hee Kim; Ulli Köster; Florian Géhin; Christophe Sage; Mourad Ramdhane; Maxime Houdouin-Quenault; Christoph E. Düllmann; Christoph Mokry; Jörg Runke; Dennis Renisch; Olivier Litaize; Olivier Serot

doi:10.1051/epjconf/202328408004

All issues

Volume 284 (2023)

EPJ Web of Conf., 284 (2023) 08004

Abstract

Open Access

Issue		EPJ Web of Conf. Volume 284, 2023 15^th International Conference on Nuclear Data for Science and Technology (ND2022)


Article Number		08004
Number of page(s)		4
Section		Nuclear Data for Reactors
DOI		https://doi.org/10.1051/epjconf/202328408004
Published online		26 May 2023

EPJ Web of Conferences 284, 08004 (2023)
https://doi.org/10.1051/epjconf/202328408004

Measurement of the fission yield of ¹³⁶Cs in the ²³⁹Pu(n_th,f) reaction

Abdelaziz Chebboubi¹^*, David Bernard¹, Vanessa Vallet¹, Grégoire Kessedjian¹, Olivier Méplan², Yung Hee Kim³, Ulli Köster³, Florian Géhin¹, Christophe Sage², Mourad Ramdhane², Maxime Houdouin-Quenault¹^,2, Christoph E. Düllmann⁴^,5^,6, Christoph Mokry⁴^,6, Jörg Runke⁴^,5, Dennis Renisch⁴^,6, Olivier Litaize¹ and Olivier Serot¹

¹ CEA, DES, IRESNE, DER, SPRC, Cadarache, Physics Studies Laboratory, 13108 Saint-Paul-lès-Durance, France
² LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble, France
³ Institut Laue-Langevin, 38042 Grenoble, France
⁴ Department of Chemistry - TRIGA site, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
⁵ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
⁶ Helmholtz Institute Mainz, 55099 Mainz, Germany

^* Corresponding author: abdelhazize.chebboubi@cea.fr

Published online: 26 May 2023

Abstract

A recent experimental campaign performed at the LOHENGRIN spectrometer at ILL aimed at measuring the independent fission yield of ¹³⁶Cs in the ²³⁹Pu(n_th,f) reaction. This nuclide can have an important contribution to the total dose rate coming from spent light water reactor UOX and MOX fuels. Moreover, its impact is of first order on the uncertainty of the total dose rate calculated in specific areas of Nuclear Power Plants within accidental conditions. One of the most important sources of uncertainty is its independent fission yield. Therefore, a new measurement of its independent yield along with a rigorous uncertainty analysis was performed. Due to its low independent yield, a new measurement technique has been applied. Ions recoiling from neutron-irradiated ²³⁹Pu target were collected by implantation into an Al foil placed inside a vacuum chamber. This foil was then transferred to a low γ-ray background setup located at nearby laboratory (LPSC). The procedure was then repeated for different LOHENGRIN settings. Compared to the JEFF-3.1.1 library, a decrease of the fission yield of ¹³⁶Cs with a reduced uncertainty is obtained.

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