Program - Brookhaven National Laboratory

WInfried Zwermann, Kiril Velkov, Andreas Pautz, Benjamin Collins, Thomas Downar, “Comparison of
XSUSA and ”TWO-STEP” aproaches for full-core uncertainty quantification”, Physor 2012, Knoxville,
Tenessee, USA, April 15-20, 2012 [5] Ball, Matthew R., ”Uncertainty Analysis In Lattice Reactor Physics
Calculations” (2012). Paper 6565 Open Access Dissertations and Theses, PhD Thesis, University of Mc-
Master, Ontario, Canada
Session FD Antineutrinos
Tuesday March 5, 2013
Room: Empire West at 10:30 AM
FD 1 10:30 AM
Results of Reactor Neutrino Measurement from RENO
JeeSeung Jang, on behalf of the RENO collaboration
Gwangju Institute of Science and Technology, Korea
The Reactor Experiment for Neutrino Oscillation(RENO) started data-taking from August, 2011 and has
observed the disappearance of reactor electron antineutrinos, consistent with neutrino oscillations. The
experiment has performed a definitive measurement of the smallest neutrino mixing angle θ13 based on
the disappearance. Antineutrinos from six reactors at Yonggwang Nuclear Power Plant in Korea, are
detected and compared by two identical detectors located at 294 m and 1383 m, respectively, from the
reactor array center. The detectors are located beneath hills that provide, respectively, 120 and 450 m
of water-equivalent of rock overburden. The far (near) detector observes 73 (780) events per day electron
antineutrino candidate events with a background fraction of 5.5% (2.7%), allowing an unprecedentedly
accurate measurement of reactor neutrino flux. In this talk, a new result from RENO will be presented
based on the further reduction of backgrounds and a spectral shape analysis. A precise measurement of
reactor neutrino flux and spectrum will be also presented in comparison with expectations.
FD 2 11:00 AM
Nuclear Data in the θ13 measurement by the Daya Bay Reactor Experiment
Patrick Huber, the Daya Bay collaboration
Virginia Tech
In this talk I will explain how reactor antineutrino fluxes are inferred from existing integral beta spectra
of fission fragments and how information from nuclear data bases enters crucially in the process. I also
will explain how our theoretical understanding of corrections to the simple, statistical beta decay spectra
enters this conversion and how missing data from nuclear data bases limits our ability to account for
induced currents. It turns out that for the θ13 measurement at the Daya Bay reactor experiment the flux
uncertainties and complexities of the flux computation have no discernible effects thanks to the careful
layout of near and far detectors.
FD 3 11:20 AM
Reactor Neutrino Spectrum Modeling from the Latest ENDF Nuclear Data Library
T.D. Johnson, A.A. Sonzogni, E.A. McCutchan
Brookhaven National Laboratory
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