Relationship between self-priming and hydraulic behavior in Venturi Scrubber

As revealed by Fukushima Daiichi nuclear disaster, countermeasures against severe accident in nuclear power plants are an urgent need. In particular, from the viewpoint of protecting a containment and suppressing the diffusion of radioactive materials, it is important to develop the device which all...

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Autores principales:	Naoki HORIGUCHI, Hiroyuki YOSHIDA, Akiko KANEKO, Yutaka ABE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	venturi scrubber visualized observation filtered venting self-priming hydraulic behavior Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/c2fa8a2cdddb4c59addc0024f6168268
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spelling	oai:doaj.org-article:c2fa8a2cdddb4c59addc0024f61682682021-11-26T06:09:52ZRelationship between self-priming and hydraulic behavior in Venturi Scrubber2187-974510.1299/mej.2014tep0026https://doaj.org/article/c2fa8a2cdddb4c59addc0024f61682682014-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/4/1_2014tep0026/_pdf/-char/enhttps://doaj.org/toc/2187-9745As revealed by Fukushima Daiichi nuclear disaster, countermeasures against severe accident in nuclear power plants are an urgent need. In particular, from the viewpoint of protecting a containment and suppressing the diffusion of radioactive materials, it is important to develop the device which allows a filtered venting of contaminated high pressure gas. In the filtered venting system that used in European reactors, so called Multi Venturi Scrubbers System is used to realize filtered venting without any power supply (Lindau, 1988) (Rust, et al., 1995). The system operates with any power supply and high pressure gas filled in the containment. This system is able to define to be composed of Venturi Scrubbers (VS) and a bubble column. In the VS, scrubbing of contaminated gas is promoted by both gas releases through a submerged VS and gas-liquid contact with splay flow formed by liquid suctioned through a hole provided by the pressure difference between inner and outer parts of a throat part of the VS. This type of the VS is called self-priming ones. However, the scrubbing mechanism of the self-priming VS including effects of gas mass flow rate and shape of the VS are understood insufficiently in the previous studies. In this study, to understand the VS operation characteristics for the filtered venting, we discussed the mechanisms of the self-priming phenomena and the hydraulic behavior in the VS. In this paper, we conducted a visualized observation of the hydraulic behavior in the VS and measured liquid flow rate of the self-primming. As a result, it is shown that there is the possibility that the VS decontamination performance falls low level with no self-priming.Naoki HORIGUCHIHiroyuki YOSHIDAAkiko KANEKOYutaka ABEThe Japan Society of Mechanical Engineersarticleventuri scrubbervisualized observationfiltered ventingself-priminghydraulic behaviorMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 4, Pp TEP0026-TEP0026 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	venturi scrubber visualized observation filtered venting self-priming hydraulic behavior Mechanical engineering and machinery TJ1-1570
spellingShingle	venturi scrubber visualized observation filtered venting self-priming hydraulic behavior Mechanical engineering and machinery TJ1-1570 Naoki HORIGUCHI Hiroyuki YOSHIDA Akiko KANEKO Yutaka ABE Relationship between self-priming and hydraulic behavior in Venturi Scrubber
description	As revealed by Fukushima Daiichi nuclear disaster, countermeasures against severe accident in nuclear power plants are an urgent need. In particular, from the viewpoint of protecting a containment and suppressing the diffusion of radioactive materials, it is important to develop the device which allows a filtered venting of contaminated high pressure gas. In the filtered venting system that used in European reactors, so called Multi Venturi Scrubbers System is used to realize filtered venting without any power supply (Lindau, 1988) (Rust, et al., 1995). The system operates with any power supply and high pressure gas filled in the containment. This system is able to define to be composed of Venturi Scrubbers (VS) and a bubble column. In the VS, scrubbing of contaminated gas is promoted by both gas releases through a submerged VS and gas-liquid contact with splay flow formed by liquid suctioned through a hole provided by the pressure difference between inner and outer parts of a throat part of the VS. This type of the VS is called self-priming ones. However, the scrubbing mechanism of the self-priming VS including effects of gas mass flow rate and shape of the VS are understood insufficiently in the previous studies. In this study, to understand the VS operation characteristics for the filtered venting, we discussed the mechanisms of the self-priming phenomena and the hydraulic behavior in the VS. In this paper, we conducted a visualized observation of the hydraulic behavior in the VS and measured liquid flow rate of the self-primming. As a result, it is shown that there is the possibility that the VS decontamination performance falls low level with no self-priming.
format	article
author	Naoki HORIGUCHI Hiroyuki YOSHIDA Akiko KANEKO Yutaka ABE
author_facet	Naoki HORIGUCHI Hiroyuki YOSHIDA Akiko KANEKO Yutaka ABE
author_sort	Naoki HORIGUCHI
title	Relationship between self-priming and hydraulic behavior in Venturi Scrubber
title_short	Relationship between self-priming and hydraulic behavior in Venturi Scrubber
title_full	Relationship between self-priming and hydraulic behavior in Venturi Scrubber
title_fullStr	Relationship between self-priming and hydraulic behavior in Venturi Scrubber
title_full_unstemmed	Relationship between self-priming and hydraulic behavior in Venturi Scrubber
title_sort	relationship between self-priming and hydraulic behavior in venturi scrubber
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/c2fa8a2cdddb4c59addc0024f6168268
work_keys_str_mv	AT naokihoriguchi relationshipbetweenselfprimingandhydraulicbehaviorinventuriscrubber AT hiroyukiyoshida relationshipbetweenselfprimingandhydraulicbehaviorinventuriscrubber AT akikokaneko relationshipbetweenselfprimingandhydraulicbehaviorinventuriscrubber AT yutakaabe relationshipbetweenselfprimingandhydraulicbehaviorinventuriscrubber
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Relationship between self-priming and hydraulic behavior in Venturi Scrubber

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