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

中国物理C, 2012, 36(1): 1-5. doi: 10.1088/1674-1137/36/1/001

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

2.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China ;Northwest Institute of Nuclear Technology, Xi'an 710024, China

3.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

4.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

5.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

6.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

基金项目: National Natural Science Foundation of China(10890094)

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

ZHOU Bin ^1, , RUAN Xi-Chao ^2, , NIE Yang-Bo ^3, , ZHOU Zu-Ying ^4, , AN Feng-Peng ^5, , CAO Jun ^6,

1.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

2.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China ;Northwest Institute of Nuclear Technology, Xi'an 710024, China

3.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

4.Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, China

5.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

6.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Keywords： spent nuclear fuel

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.

参考文献

[1]	Kopeikin VI;Milkaelyan LA;Sinev VV .Antineutrino background from spent-fuel storage in sensitive searches for Theta(13) at reactors[J].Physics of atomic nuclei,2006(2):185-188.
[2]	AN Feng-Peng,TIAN Xin-Chun,ZHAN Liang,CAO Jun.Systematic impact of spent nuclear fuel on θ13 sensitivity at reactor neutrino experiment[J].中国物理C（英文版）,2009(09):711-716.

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

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