Aerosol retention in low-subcooling pools under realistic accident conditions

Dehbi, A.; Suckow, D.; Guentay, S.

doi:10.1016/s0029-5493(00)00343-5

Cited by 60 publications

(10 citation statements)

References 2 publications

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“…The models are very detailed and at the same time they differ significantly from each other. And, in both cases their authors are rather dissatisfied with the performance of the models when compared to data; data from ARTIST (Lind et al, 2011), POSEIDON (Dehbi et al, 2001), and from CIEMAT tests in PECA facility (Herranz et al, 1997). That is, the models fail to predict the high aerosol DFs in a flooded bundle of tubes and in many cases even the DFs in bare pools under jet regime conditions.…”

Section: Sparc90 and Other Scrubbing Modelsmentioning

confidence: 99%

“…The existence of the tube bundle generates far more complicated flow patterns than those in the bare pools increasing the retention of aerosols in the flooded bundle as compared to the retention in bare pools. Farther up from the break, in the "rise zone" where the flow direction is mainly upwards, the scrubbing of aerosols in SG secondary is more closely approximated by values for scrubbing in bare pools (Dehbi et al, 2001). Even then, this is a conservative approach because the presence of the structures perturbs the flow far from the break zone so that the aerosol retention is higher even in the rise zone.…”

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

“…Fig. 13b presents the same flooded bundle data, as a function of Stk * submergence in logarithmic scale, compared to the data for bare pools from the POSEIDON experimental program (Dehbi et al, 2001).…”

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

“…In the rise zone, the well-established exponential relationship (Dehbi et al, 2001) between the DF rise and the submergence L for bare pools was employed And the total DF for the flooded SG secondary can be decomposed (Lind et al, 2011) into DF = DF break * DF rise Thus the joint correlation, with the explicit exponential term, used in this work to estimate the aerosol retention in a postulated ISGTR scenario with mitigation by SG secondary re-fill is as follows…”

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

See 3 more Smart Citations

Integral analyses of fission product retention at mitigated thermally-induced SGTR using ARTIST experimental data

Rydl

Lind

Birchley

2016

Nuclear Engineering and Design

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Section: Sparc90 and Other Scrubbing Modelsmentioning

confidence: 99%

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

Section: Experimental Findings and Implementation In Integral Analysesmentioning

confidence: 99%

See 2 more Smart Citations

Integral analyses of fission product retention at mitigated thermally-induced SGTR using ARTIST experimental data

Rydl

Lind

Birchley

2016

Nuclear Engineering and Design

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“…DF in gas jet injection conditions was measured. Dehbi et al [7] did an experiment in a low-subcooling pool under realistic accident conditions. It was pointed out that there was a large discrepancy of DF between the experiment and the analysis by BUSCA code.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Decontamination Factor Dependence on Aerosol Concentration in Pool Scrubbing

Sun

Sibamoto

Okagaki

et al. 2019

Science and Technology of Nuclear Installations

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Because a pool scrubbing is important for reducing radioactive aerosols to the environment for a nuclear reactor in a severe accident situation, many researches have been performed. However, decontamination factor (DF) dependence on aerosol concentration was seldom considered in an aerosol number concentration with limited aerosol coagulation. To investigate an existence of DF dependence on the concentration, DF in a pool scrubbing with 2.4 m water submergence was derived from aerosol measurements by light scattering aerosol spectrometers. It was observed that DF increased monotonically with decreasing particle number concentration in a constant thermohydraulic condition: a gradual increase from 10 to 32 in the range of 1.3×1011 - 8.0×1011/m3 at the inlet and a significant increase from 32 to 77 in the range of 3.6×1010 - 1.3×1011/m3. Two validation experiments were conducted in the range with the gradual DF increase to confirm whether the DF dependence is a real pool scrubbing phenomenon. In addition, characteristics of the DF dependence in different water submergences were investigated experimentally. It was found that the DF dependence became more significant in higher water submergence. Significant DF dependence was observed in the condition of the water submergence higher than 1.6 m and the inlet particle number concentration less than around 1×1011 /m3. It is recommended to perform further analysis for the DF dependence mainly in such condition since it could make a difference to both experiment and model of the pool scrubbing.

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