Title: Americium-241 integral radiative capture cross section in over-moderated neutron spectrum from pile oscillator measurements in the Minerve reactor
Authors: GESLOT B.GRUEL A.ROS P.BLAISE P.LECONTE P.NOGUERE G.MATHIEU LUDOVICVILLAMARIN D.BECARES V.PLOMPEN ARJANKOPECKY STEFANSCHILLEBEECKX PETER
Citation: EPJ Web of Conferences vol. 146 p. 06016
Publisher: EDP Sciences
Publication Year: 2017
JRC N°: JRC108739
ISSN: 2100 014X
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC108739
DOI: 10.1051/epjconf/201714606016
Type: Articles in periodicals and books
Abstract: An experimental program, called AMSTRAMGRAM, was recently conducted in the Minerve low power reactor operated by CEA Cadarache within the frame of the CHANDA initiative (Solving CHAllenges in Nuclear Data). Its aim was to measure the integral capture cross section of 241Am in the thermal domain. Motivation of this work is driven by large differences in this actinide thermal point reported by major nuclear data libraries. The AMSTRAMGRAM experiment, that made use of well characterized EC-JRC americium samples, was based on the oscillation technique commonly implemented in the Minerve reactor. First results are presented and discussed in this article. A preliminary calculation scheme was used to compare measured and calculated results. It is shown that this work confirms a bias previously observed with JEFF-3.1.1 (C/E-1 = −10.5 ± 2%). On the opposite, the experiment is in close agreement with 241Am thermal point reported in JEFF-3.2 (C/E-1 = 0.5 ± 2%).
JRC Directorate:Nuclear Safety and Security

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