Variance-to-mean method generalized by linear difference filter technique

Hashimoto, Kazuo; Ohsaki, Hiroshi; Horiguchi, Tetsuo; Yamane, Yoshihiro; Shiroya, Seiji

doi:10.1016/s0306-4549(97)00077-7

Cited by 16 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A difference filter is effective for suppressing the divergence. Modification of the Feynman-method with the filter 6) enables the measurement of an value of the system where a neutron flux varies over time. If the 1 st order difference filter is applied, the modified method evaluates the ratio of a variance of (N i À N iÀ1 ) to a mean of N i which is also a function of ( expressed as 6) Vð Record on Hard Disk…”

Section: Feynman-methods With the Difference Filtermentioning

confidence: 99%

See 1 more Smart Citation

Real Time a Value Measurement with Feynman-α Method Utilizing Time Series Data Acquisition on Low Enriched Uranium System

Tonoike

Yamamoto

Watanabe

et al. 2004

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

As a part of the development of a subcriticality monitoring system, a system which has a time series data acquisition function for detector signals and a real time evaluation function of the value with the Feynman-method was established, with which the kinetic parameter ( value) was measured at the STACY heterogeneous core. Hashimoto's difference filter was implemented in the system, enabling the measurement in a critical condition. The measurement result of the new system agreed with the pulsed neutron method. The value was also evaluated by the newly developed algorithm of -mode calculations for the Monte Carlo method, which was compared with the experimental value. Those computational and experimental values show agreement within their uncertainties.

show abstract

Section: Feynman-methods With the Difference Filtermentioning

confidence: 99%

“…The 2 nd order filter can also be utilized by evaluating the ratio of a variance of (N i À1=2N iÀ1 À1=2N iþ1 ) to a mean of N i written as follows, 6) which suppresses the slow change of neutron flux more than the 1 st order filter,…”

Section: Feynman-methods With the Difference Filtermentioning

confidence: 99%

Real Time a Value Measurement with Feynman-α Method Utilizing Time Series Data Acquisition on Low Enriched Uranium System

Tonoike

Yamamoto

Watanabe

et al. 2004

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

show abstract

“…The detailed derivation of (3) and (5) is described in [4]. The subcritical reactivity is given by the relation (5) where is the neutron lifetime and is the prompt neutron decay constant for the delayed critical state.…”

Section: Difference Filter Techniquementioning

confidence: 99%

“…However, the subcritical reactivity in an unsteady state, in which subcritical reactivity is varying with time, was not obtained by the conventional Feynman-technique. Manuscript In this work, the difference filter technique [4], [5] was applied in order to monitor the slightly subcritical ( ) reactivity in an unsteady state using the Digital Time-Series Data Acquisition System.…”

Section: Introductionmentioning

confidence: 99%

Measurement of subcritical reactivity in unsteady state with Digital Time-Series Data Acquisition System using difference filter technique

Wakabayashi

Yonemura

Heguri

et al. 2002

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

The Digital Time-Series Data Acquisition System using first-in-first-out (FIFO) memory module has been developed for the monitoring of subcritical reactivity. The system records arriving time of the signal from a neutron detector, and time-series data are saved in a personal computer (PC). Using this system, the measurement of time-series data is carried out more efficiently than that using a conventional multichannel scaler (MCS) system, and it has been applied for the monitoring of subcritical reactivity of the reactor in a steady state using the conventional Feynmantechnique. In the present work, this system was applied for the monitoring of subcritical reactivity in an unsteady state using the difference filter technique. The test experiment was carried out with the research reactor of Atomic Energy Institute of Kinki University, Japan. From the experimental results, it was shown that the present system was useful for the continuous monitoring of varying subcritical reactivity by application of the difference filter technique.

show abstract

Stability improvement of noise analysis method in the case of random noise contamination for subcriticality measurements

Kong

Lee

2014

Annals of Nuclear Energy

View full text Add to dashboard Cite

Variance-to-mean method generalized by linear difference filter technique

Cited by 16 publications

References 4 publications

Real Time a Value Measurement with Feynman-α Method Utilizing Time Series Data Acquisition on Low Enriched Uranium System

Real Time a Value Measurement with Feynman-α Method Utilizing Time Series Data Acquisition on Low Enriched Uranium System

Measurement of subcritical reactivity in unsteady state with Digital Time-Series Data Acquisition System using difference filter technique

Stability improvement of noise analysis method in the case of random noise contamination for subcriticality measurements

Contact Info

Product

Resources

About