Program - Brookhaven National Laboratory

Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and Los Alamos National
Laboratory under Contract DE-AC52-06NA25396.
[1] M. Heil et al., Nucl. Instrum. Methods Phys. Res. A 456 (2001) 229. [2] R.C. Haight et al., Proc.
of the Int. Workshop on Fast Neutron Detectors and Applications, Ein Gedi, Israel, Nov 6 - 11, 2011.
[3] C.Y. Wu et al., Lawrence Livermore National Laboratory, LLNL-JRNL-541392 (2012); submitted for
publication in Nucl. Instrum. Methods in Phys. Res. A (2012). [4] R.A. Henderson et al., Nucl. Instrum.
Methods in Phys. Res. A 655, 66 (2011). [5] C.Y. Wu et al., Lawrence Livermore National Laboratory,
LLNL-TR-461044 (2010).
PR 35
Design of the MAESTRO Experimental Programme Dedicated to the Validation of
Neutron Cross Sections: Preliminary Results for Rh, Co, V and Mn
P. Leconte, B. Geslot, A. Gruel, J. Di-Salvo, A. Pépino, R. Eschbach, S. Cathalau, J.C. Bosq, P. Blaise,
CEA Cadarache.
The MAESTRO experimental program has been designed to improve the accuracy of neutron cross sections
of a wide range of structural, moderation, detection and absorption materials used for LWR applications.
Pile-oscillation experiments and neutron activation analysis are performed in the MINERVE low power
facility, located at Cadarache (France) . A first stage of the programme has been completed in 2011 with
the measurement and analysis of samples made of pure Rh, Co, V and Mn rods, for the validation of GEN-
III+ in-core instrumentation. A second phase will be conducted in 2012 and 2013 with pile-oscillation
and activation analysis of 45 kinds of sample, including natural materials (Mg, Al, Si, Cl, Ca, Ti, Cr,
Fe, Ni, Cu, Zn, Zr, Mo, Sn, V, Mn, Co, Nb, Rh, H2O, D2O, Be, C, CH2, Cs, Ag, In, Cd, Eu, Gd, Dy,
Er, Hf), isotopic materials (107Ag, 109Ag, 153Eu), industrial alloys (Zy4, M5, SS304, SS316, Inconel-
718, concrete) and calibration materials (Au, B, Li) In this paper the design studies of the programme,
including the sample preparation, the core configuration and the optimization of experimental techniques
are detailed. Then, preliminary results are presented concerning the analysis of neutron activation and
pile-oscillation experiments of Rh, Co, V and Mn.
PR 36
Integral Cross Section Data Measurements Around 14 MeV for Validation of Activation
Libraries
L. W. Packer, M. Gilbert, S. Lilley, Applied Radiation Physics Section Leader— Phone: +44 (0)1235
466458 Theory and Modelling Department, Culham Centre for Fusion Energy.
The radioactive properties of materials over time, through and after the operation lifetime of a fusion device
or power plant for example, may be simulated using the European Activation System II 2012 (EASY-
II(12)). EASY-II(12) allows neutron-induced activation of materials by a range of different reactions. It
has recently been updated with enhanced physics in the FISPACT-II inventory code and expanded nuclear
data libraries which have now been released for wider use. To give users of EASY-II(12) confidence in
the predictions of activation quantities it is necessary that the inventory code and the data libraries are
validated. This is done by comparing the predictions of EASY-2012 with activation measurements made
on materials relevant to fusion technology in well-characterised neutron fields. If the ratio of results from
Experiment (E) and Calculation (C) is close to 1 then the data are validated. In other cases it may be
necessary to change the library data to improve the C/E ratio. For the present and ongoing validation
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