Application of advanced Rossi-alpha technique to reactivity measurements at Kyoto University Critical Assembly

Kong, Chidong; Choe, Jiwon; Yum, Seongpil; Jang, Jaerim; Lee, Woonghee; Kim, Hanjoo; Lemaire, Matthieu; Nguyen, Khang Hoang Nhat; Nguyen, Tung Dong Cao; Dos, Vutheam; Lee, Deokjung; Shin, Ho Cheol; Yamanaka, Masao; Pyeon, Cheol Ho

doi:10.1016/j.anucene.2018.04.009

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…Noise experiments using isotopic neutron source which is Poisson in character have been carried out in different experimental facilities [4,5,6]. Various theoretical developments have also been carried out for pulsed and continuous neutron source under consideration of Poisson source characteristics [7,8,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Noise experiments in BRAHMMA subcritical system using isotopic Poisson source and accelerator based neutron source

Ray

Kumar

Patel

et al. 2022

J. Phys.: Conf. Ser.

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Reactivity measurement using noise methods have been carried out in zero power subcritical system BRAHMMA, installed in BARC, India. During noise experiments, an Am-Be neutron source (1Ci) has been placed at the centre of the subcritical system. However, the proposed external neutron source in ADS, based on particle accelerator, is different from isotopic neutron source and the inherent fluctuations in beam current and accelerating voltage makes the source non-Poisson. In this context, Degweker and Rana had postulated a noise theory based on exponentially correlated Gaussian source characteristics for ADS. In noise experiments based on this postulate, a D-T neutron generator has been used in pulsed mode and source characterisation has been carried out to determine the distribution function, source correlation factor and D+ beam pulse shape. It has been observed that the source is Gaussian in nature, the source correlation factor is very large compared to the prompt neutron decay constant and the pulsed D+ beam is rectangular in shape. In noise experiments, the time stamped data have been analysed using various noise methods. The measured prompt neutron decay constant using Poisson source and correlated Gaussian source are in good agreement with theoretical value and amongst them.

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Section: Introductionmentioning

confidence: 99%

Noise experiments in BRAHMMA subcritical system using isotopic Poisson source and accelerator based neutron source

Ray

Kumar

Patel

et al. 2022

J. Phys.: Conf. Ser.

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Introduction

Pyeon

2021

Accelerator-Driven System at Kyoto University Critical Assembly

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At the Kyoto University Critical Assembly (KUCA), the accelerator-driven system (ADS) is composed of a solid-moderated and solid-reflected core (A-core) and a pulsed-neutron generator (14 MeV neutrons) or the fixed-filed alternating gradient (FFAG) accelerator (100 MeV protons). At KUCA, two external neutron sources, including 14 MeV neutrons and 100 MeV protons, are separately injected into the A-core, and employed for carrying out the ADS experiments. With the combined use of the A-core and two external neutron sources, basic and feasibility studies of ADS have been engaged in the examination of neutronics of ADS, through the measurements of statics and kinetics parameters of reactor physics, including subcritical multiplication factor, subcriticality, prompt neutron decay constant, effective delayed neutron fraction, neutron spectrum, and reaction rates.

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Sensitivity analysis of source intensity and time bin size for the Rossi-alpha method in a numerical reactor model

Kong

Lee

2019

Annals of Nuclear Energy

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Application of advanced Rossi-alpha technique to reactivity measurements at Kyoto University Critical Assembly

Cited by 7 publications

References 12 publications

Noise experiments in BRAHMMA subcritical system using isotopic Poisson source and accelerator based neutron source

Noise experiments in BRAHMMA subcritical system using isotopic Poisson source and accelerator based neutron source

Introduction

Sensitivity analysis of source intensity and time bin size for the Rossi-alpha method in a numerical reactor model

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