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We report a fuel-dependent reactor electron antineutrino ($overline{ u}_e$) yield using six 2.8 GW$_{text{th}}$ reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. The analysis uses $850,666$ $overline{ u}_e$ candidate events with a background fraction of 2.0 % acquired through inverse beta decay (IBD) interactions in the near detector for 1807.9 live days from August 2011 to February 2018. Based on multiple fuel cycles, we observe a fuel $^{235}$U dependent variation of measured IBD yields with a slope of $(1.51 pm 0.23) times 10^{-43} $cm$^2$/fission and measure a total average IBD yield of $(5.84 pm 0.13) times 10^{-43} $cm$^2$/fission. The hypothesis of no fuel-dependent IBD yield is ruled out at 6.6 $sigma$. The observed IBD yield variation over $^{235}$U isotope fraction does not show significant deviation from the Huber-Mueller (HM) prediction at 1.3 $sigma$. The measured fuel-dependent variation determines IBD yields of $(6.15 pm 0.19) times 10^{-43} $cm$^2$/fission and $(4.18pm 0.26) times 10^{-43} $cm$^2$/fission for two dominant fuel isotopes $^{235}$U and $^{239}$Pu, respectively. The measured IBD yield per $^{235}$U fission shows the largest deficit relative to the HM prediction. Reevaluation of the $^{235}$U IBD yield per fission may mostly solve the Reactor Antineutrino Anomaly (RAA) while $^{239}$Pu is not completely ruled out as a possible contributor of the anomaly. We also report a 2.9 $sigma$ correlation between the fractional change of the 5 MeV excess and the reactor fuel isotope fraction of $^{235}$U.
The RENO experiment reports measured flux and energy spectrum of reactor electron antineutrinos,($overline{ u}_e$) from the six reactors at Hanbit Nuclear Power Plant. The measurements use 966,094,(116,111),$overline{ u}_e$ candidate events with a ba
The RENO experiment reports more precisely measured values of $theta_{13}$ and $|Delta m_{ee}^2|$ using $sim$2,200 live days of data. The amplitude and frequency of reactor electron antineutrino ($overline{ u}_e$) oscillation are measured by comparin
The Reactor Experiment for Neutrino Oscillation (RENO) experiment has been taking data using two identical liquid scintillator detectors of 44.5 tons since August 2011. The experiment has observed the disappearance of reactor neutrinos in their inter
Neutrinos are elementary particles in the standard model of particle physics. There are 3 flavors of neutrinos that oscillate among themselves. Their oscillation can be described by a 3$times$3 unitary matrix, containing three mixing angles $theta_{1
Recently new reactor antineutrino spectra have been provided for 235U, 239Pu, 241Pu and 238U, increasing the mean flux by about 3 percent. To good approximation, this reevaluation applies to all reactor neutrino experiments. The synthesis of publishe