Study of hydrodynamics and iodine removal by self-priming venturi scrubber

Ahad Jawaria; Rizwan Talha; Farooq Amjad; Waheed Khalid; Ahmad Masroor; Qureshi Kamran Rasheed; Siddique Waseem; Irfan Naseem

doi:10.1016/j.net.2022.09.005

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자료유형: 학술저널

저자정보: Ahad Jawaria (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences) Rizwan Talha (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences) Farooq Amjad (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences) Waheed Khalid (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences) Ahmad Masroor (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences) Qureshi Kamran Rasheed (Pakistan Institute of Engineering and Applied Sciences) Siddique Waseem (Pakistan Institute of Engineering and Applied Sciences) Irfan Naseem (Department of Nuclear Engineering Pakistan Institute of Engineering and Applied Sciences)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제1호

발행연도: 2023.1

수록면: 169 - 179 (11page)

DOI: 10.1016/j.net.2022.09.005

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Filtered containment system is a passive safety system that controls the over-pressurization of containment in case of a design-based accidents by venting high pressure gaseous mixture, consisting of air, steam and radioactive particulate and gases like iodine, via a scrubbing system. An indigenous lab scale facility was developed for research on iodine removal by venturi scrubber by simulating the accidental scenario. A mixture of 0.2 % sodium thiosulphate and 0.5 % sodium hydroxide, was used in scrubbing column. A modified mathematical model was presented for iodine removal in venturi scrubber. Improvement in model was made by addition of important parameters like jet penetration length, bubble rise velocity and gas holdup which were not considered previously. Experiments were performed by varying hydrodynamic parameters like liquid level height and gas flow rates to see their effect on removal efficiency of iodine. Gas holdup was also measured for various liquid level heights and gas flowrates. Removal efficiency increased with increase in liquid level height and gas flowrate up to an optimum point beyond that efficiency was decreased. Experimental results of removal efficiency were compared with the predicted results, and they were found to be in good agreement. Maximum removal efficiency of 99.8% was obtained.

#Filtered containment venting system #Nuclear powerplants #Severe accident mitigation #Venturi scrubber #Iodine removal #Environment safety #Mass transfer #Hazardous gas removal

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