Mg. Na et Hc. No, QUANTITATIVE-EVALUATION OF SWELLING OR SHRINKING LEVEL CONTRIBUTIONS IN STEAM-GENERATORS USING SPECTRUM ANALYSIS, Annals of nuclear energy, 20(10), 1993, pp. 659-666
The swell and shrink phenomena make controlling the water level in ste
am generators extremely difficult, along with the flow errors. Therefo
re, quantitative evaluation of the swell and shrink is interesting and
valuable in analyzing the nuclear steam generator and in the design o
f its controller. The power spectral density function (PSDF) distribut
es the power of the signal for frequencies. This excitatory input sign
al is assumed to be the band-pass white noise, which is more realistic
than the ideal white noise. The integration of the PSDF over frequenc
y is defined as energy. We derive the energy contribution of each dyna
mic mode using the PSDF. Its energy contribution can be calculated eas
ily by arithmetic calculation.