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**Harvard**

Pázsit, I., Kitamura, Y., Wright, J. och Misawa, T. (2005) *Calculation of the pulsed Feynman-alpha formulae and their experimental verification*.

** BibTeX **

@article{

Pázsit2005,

author={Pázsit, Imre and Kitamura, Yasunori and Wright, Johanna and Misawa, T},

title={Calculation of the pulsed Feynman-alpha formulae and their experimental verification},

journal={Annals of Nuclear Energy},

issn={0306-4549},

volume={32},

issue={9},

pages={986-1007},

abstract={An effective method of calculating the pulsed Feynman-alpha formula for finite width pulses is introduced and applied in this paper. The method is suitable for calculating both
the deterministic and the stochastic Feynman-alpha formulae, while also being capable of treating various pulse shapes through very similar steps and partly identical formulae. In the paper both the deterministic and the stochastic cases are treated for square and Gaussian
pulses. The solutions show a very good agreement with the results of currently performed experiments by some of the authors at the Kyoto University Critical Assembly (KUCA).
<p />
The formulae obtained are also used for a quantitative evaluation of the prompt neutron decay constant from a large number of experiments made at the KUCA for a wide range of parameters such as subcritical reactivity, pulse repetition frequency and pulse width. The suitability of the formulae to determine the prompt neutron decay constant a by curve fitting to the measured data was investigated. It was found that, despite the larger deviation from the
traditional Feynman Y(T)-curves from the traditional ones with a constant source (i.e., larger ripples superimposed on a smooth curve), the stochastic pulsing method is superior to the deterministic one in that it yields the correct a value for all subcriticalities. The deterministic
method also works fine for most cases, but its application is not so straightforward.},

year={2005},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 5992

A1 Pázsit, Imre

A1 Kitamura, Yasunori

A1 Wright, Johanna

A1 Misawa, T

T1 Calculation of the pulsed Feynman-alpha formulae and their experimental verification

YR 2005

JF Annals of Nuclear Energy

SN 0306-4549

VO 32

IS 9

SP 986

AB An effective method of calculating the pulsed Feynman-alpha formula for finite width pulses is introduced and applied in this paper. The method is suitable for calculating both
the deterministic and the stochastic Feynman-alpha formulae, while also being capable of treating various pulse shapes through very similar steps and partly identical formulae. In the paper both the deterministic and the stochastic cases are treated for square and Gaussian
pulses. The solutions show a very good agreement with the results of currently performed experiments by some of the authors at the Kyoto University Critical Assembly (KUCA).
<p />
The formulae obtained are also used for a quantitative evaluation of the prompt neutron decay constant from a large number of experiments made at the KUCA for a wide range of parameters such as subcritical reactivity, pulse repetition frequency and pulse width. The suitability of the formulae to determine the prompt neutron decay constant a by curve fitting to the measured data was investigated. It was found that, despite the larger deviation from the
traditional Feynman Y(T)-curves from the traditional ones with a constant source (i.e., larger ripples superimposed on a smooth curve), the stochastic pulsing method is superior to the deterministic one in that it yields the correct a value for all subcriticalities. The deterministic
method also works fine for most cases, but its application is not so straightforward.

LA eng

DO 10.1016/j.anucene.2004.12.007

LK http://dx.doi.org/10.1016/j.anucene.2004.12.007

OL 30