Measurements of the Temperature Coefficient of Resonance Absorption in Uranium Metal and Uranium Oxide

Palowitch, B.L.; Frantz, F.S.

doi:10.13182/nse63-a26414

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…The Doppler coefficient has been measured in small facilities, such as a critical assembly and an experimental reactor. [5][6][7][8] In these experiments, a sample of test material, whose Doppler coefficient was to be measured, was heated with electric heaters or laser beams so as to keep a predetermined temperature. The Doppler coefficient was evaluated from reactivity changes induced by temperature changes of the test sample.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

Tsuji

Shimazu

Narabayashi

et al. 2009

Journal of Nuclear Science and Technology

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A method for estimating the Doppler coefficient from low power transient data that are measured in a routine experiment conducted in a zero-power reactor physics test of a PWR power plant has been developed. A dynamics identification model was introduced by considering two dynamics components for reactor kinetics and heat removal in the primary coolant loops. The dynamics identification method in the time domain was applied under consideration that the effect of reactivity feedback observed in the experiment was very small and measured transient data contained some intermittent intervals unavailable for dynamics identification. Unknown parameters, including the Doppler coefficient, contained in the dynamics model were determined stepwise through five estimation steps. In these steps, gamma ray noises were removed from the NIS signal, the reactivity feedback component was extracted from reactivity transient, and fuel temperature transient was determined in such way as to reproduce the observed low power transient in the digital simulation. In the final step, the Doppler coefficient was estimated from the extracted reactivity feedback component using the quantities evaluated in the preceding steps. The estimated value agreed well with the value evaluated with a core design code.

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Section: Introductionmentioning

confidence: 99%

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

Tsuji

Shimazu

Narabayashi

et al. 2009

Journal of Nuclear Science and Technology

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A hybrid static/dynamic heating technique for the measurement of nuclear doppler effects

Russell

Bhattacharyya

Foell

1978

Nuclear Instruments and Methods

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High Temperature Doppler Effect Experiment for²³⁸U at FCA, (II)

Okajima¹,

Oigawa²,

Andoh³

et al. 1997

Journal of Nuclear Science and Technology

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Measurements of the Temperature Coefficient of Resonance Absorption in Uranium Metal and Uranium Oxide

Cited by 6 publications

References 8 publications

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

A hybrid static/dynamic heating technique for the measurement of nuclear doppler effects

High Temperature Doppler Effect Experiment for²³⁸U at FCA, (II)

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Measurements of the Temperature Coefficient of Resonance Absorption in Uranium Metal and Uranium Oxide

Cited by 6 publications

References 8 publications

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

Estimation of the Doppler Coefficient from a Lower Power Transient Observed in a Zero-Power Reactor Physics Test of a PWR (I)—Methodology—

A hybrid static/dynamic heating technique for the measurement of nuclear doppler effects

High Temperature Doppler Effect Experiment for238U at FCA, (II)

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Product

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About

High Temperature Doppler Effect Experiment for²³⁸U at FCA, (II)