A study of antineutrino spectra from spent nuclear fuel at Daya Bay

ZHOU Bin; RUAN Xi-Chao; NIE Yang-Bo; ZHOU Zu-Ying; AN Feng-Peng; CAO Jun

doi:10.1088/1674-1137/36/1/001

Chinese Physics C> 2012, Vol. 36> Issue(1) : 1-5 DOI: 10.1088/1674-1137/36/1/001

A study of antineutrino spectra from spent nuclear fuel at Daya Bay

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Abstract：
The Daya Bay Reactor Antineutrino Experiment is designed to determine the as yet unknown neutrino mixing angle, θ₁₃, by measuring the disappearance of electron antineutrinos from several nuclear reactor cores. The projected sensitivity in sin²(2θ₁₃) of better than 0.01 at a 90% CL should be achieved after three years of data-taking. Antineutrinos emitted from spent nuclear fuel (SNF) distort the soft part of the energy spectrum. In this article, a calculation of the antineutrino spectra from the long-life isotopes in SNF is performed. A non-equilibrium generation of long half-life isotopes during the running time of the reactor is also analyzed. Finally, we show that the antineutrino event rate contribution from SNF, which has been stored in the SNF pool for several years, may be non-negligible.

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ZHOU Bin, RUAN Xi-Chao, NIE Yang-Bo, ZHOU Zu-Ying, AN Feng-Peng and CAO Jun. A study of antineutrino spectra from spent nuclear fuel at Daya Bay[J]. Chinese Physics C, 2012, 36(1): 1-5. doi: 10.1088/1674-1137/36/1/001

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Received: 2011-05-25
Revised: 2011-06-30

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沈阳化工大学材料科学与工程学院沈阳 110142

A study of antineutrino spectra from spent nuclear fuel at Daya Bay

Corresponding author: ZHOU Bin,

Corresponding author: RUAN Xi-Chao,

Received Date: 2011-05-25
Accepted Date: 2011-06-30
Available Online: 2012-01-05

Abstract: The Daya Bay Reactor Antineutrino Experiment is designed to determine the as yet unknown neutrino mixing angle, θ₁₃, by measuring the disappearance of electron antineutrinos from several nuclear reactor cores. The projected sensitivity in sin²(2θ₁₃) of better than 0.01 at a 90% CL should be achieved after three years of data-taking. Antineutrinos emitted from spent nuclear fuel (SNF) distort the soft part of the energy spectrum. In this article, a calculation of the antineutrino spectra from the long-life isotopes in SNF is performed. A non-equilibrium generation of long half-life isotopes during the running time of the reactor is also analyzed. Finally, we show that the antineutrino event rate contribution from SNF, which has been stored in the SNF pool for several years, may be non-negligible.