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Keywords: decontamination factor
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Proceedings Papers

Proc. ASME. ICONE29, Volume 15: Student Paper Competition, V015T16A119, August 8–12, 2022
Paper No: ICONE29-94057
... of a source term. To meet this target, we have developed the computer program AESOP that deals with the expansion and the deformation of the bubble together with the aerosol absorption and researched the sensitivities of the physical parameters on decontamination factor (DF) of cesium aerosols...
Proceedings Papers

Proc. ASME. ICONE29, Volume 15: Student Paper Competition, V015T16A025, August 8–12, 2022
Paper No: ICONE29-90448
... removal in pool scrubbing. However, the removal mechanism is not fully understood because the phenomena occurring in pool scrubbing are very complicated. It has been shown that parameters such as pool water depth and FPs size affect FPs removal rate (DF: Decontamination Factor), but there have been few...
Proceedings Papers

Proc. ASME. ICONE29, Volume 11: Mitigation Strategies for Beyond Design Basis Events, V011T11A015, August 8–12, 2022
Paper No: ICONE29-92561
... the possibility to develop a pool scrubbing measure to retain graphite dust and fission products for the overpressure discharge of HTGR. A scrubber is set up with aerosol particle concentration measurement at both the inlet and outlet, which enables us to determine the decontamination factor (DF). By conducting...
Proceedings Papers

Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A003, August 4–6, 2021
Paper No: ICONE28-61490
.... This result suggests that the overestimating of DF at downstream is caused by wg Radius average of gas phase velocity overestimating bubble breakup in MELCOR model. z Submergence Keywords: Pool scrubbing, decontamination factor, Two Greek Symbol phase flow, severe accident, wire-mesh sensor Instantaneous...
Proceedings Papers

Proc. ASME. ICONE28, Volume 3: Computational Fluid Dynamics (CFD); Verification and Validation; Advanced Methods of Manufacturing (AMM) for Nuclear Reactors and Components; Decontamination, Decommissioning, and Radioactive Waste Management; Beyond Design Basis and Nuclear Safety; Risk Informed Management and Regulation, V003T12A007, August 4–6, 2021
Paper No: ICONE28-63286
... In a postulated accident of fuel pin failure of sodium Size Distribution, Agglomeration, Sodium Pool, Decontamination Factor cooled fast reactor, a fission product cesium will be released from the failed pin as an aerosol such as cesium iodide and/or cesium NOMENCLATURE oxide together with a fission product noble...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 2: Nuclear Policy; Nuclear Safety, Security, and Cyber Security; Operating Plant Experience; Probabilistic Risk Assessments; SMR and Advanced Reactors, V002T08A025, August 4–5, 2020
Paper No: ICONE2020-16208
... with the aerosol absorption. In the analysis, initial bubble diameter, sodium pool depth and temperature, aerosol particle diameter and density, initial aerosol concentration in the bubble were changed as parameter, and the sensitivities of these parameters on decontamination factor (DF) of cesium aerosol were...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T12A011, August 4–5, 2020
Paper No: ICONE2020-16216
... are not enough. Therefore, a reliable model to evaluate particle decontamination efficiency by pool scrubbing is highly regarded. Currently, decontamination factor (DF) of pool scrubbing is calculated by analysis code such as MELCOR. In the MELCOR code, some assumptions and empirical formula are used, e.g...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T13A010, August 4–5, 2020
Paper No: ICONE2020-16173
... the fundamental process of particle decontamination from gas to liquid-phase, we focused on decontamination factor (DF) of particle from a single bubble. However, it is very difficult to calculate the initial particle concentration inside the bubble. Therefore, in our experiment, we developed a method to measure...
Proceedings Papers

Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T13A015, August 4–5, 2020
Paper No: ICONE2020-16223
.... decontamination factor particle number density condensation particle growth pool scrubbing THE DEPENDENCE OF POOL SCRUBBING DECONTAMINATION FACTOR ON PARTICLE NUMBER DENSITY: MODELING BASED ON BUBBLE MASS AND ENERGY BALANCE Yasuteru SIBAMOTO, Haomin SUN, Yoshiyasu HIROSE, Yutaka KUKITA Nuclear Safety...