Understanding of the operation behaviour of a Passive Autocatalytic Recombiner (PAR) for hydrogen mitigation in realistic containment conditions during a severe Light Water nuclear Reactor (LWR) accident

Payot, F.; Reinecke, Ernst-Arndt; Morfin, F.; Sabroux, J. C.; Meynet, N.; Boutarfaïa, Ahmed; March, P.; Zeyen, R.

doi:10.1016/j.nucengdes.2012.03.042

Cited by 39 publications

(8 citation statements)

References 21 publications

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“…The other types of catalytic recombiners consisted of spherical granules of a ceramic carrier (e.g. alumina) coated with Pd, porous catalyst material (cordierite 2MgO 2Al 2 O 3 5SiO 2 ) in the shape of honeycomb coated with platinum [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…At massive hydrogen release (concentration of hydrogen above 7-10%) as in case of severe accident, the recombiner can overheat due to the large exothermic effect of the recombination reaction and thus PAR reactors may become an ignition source itself. This problem has been studied mainly by the numerical simulation of hydrodynamic conditions and hydrogen mitigation in catalytic recombiner [1][2][3][4][5][6]. Several analytical models have been developed to study the recombiner behavior with regard to detailed fluid kinetics, hydrogen and temperature distribution along with the recombination process.…”

Section: Introductionmentioning

confidence: 99%

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Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Lalik

Kosydar

Tokarz-Sobieraj

et al. 2015

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Lalik

Kosydar

Tokarz-Sobieraj

et al. 2015

Applied Catalysis A: General

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“…Далее следуют адсорбция, поверхностная диффузия, реакция и десорбция, диффузия продуктов реакции в поток. Кинетические характеристики процессов приведены, например, в [14]. Поскольку до появления водорода пластина находится в контакте с воздухом, платиновые структуры оказываются предварительно насыщенными кислородом.…”

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“…В атмосфере герметичной оболочки наиболее вероятный состав газов -это бедная водороднокислородная смесь с большим количеством разбавителей, в основном азота и водяного пара. В таких условиях реакция превращения водорода в воду имеет первый порядок по водороду и мало зависит от присутствия других веществ [14,[16][17][18][19][20].…”

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Passive autocatalitic recombiner characteritics calculation during severe accident on AES-2006 NPP

Сорокін

2020

Vescì Akademìì navuk Belarusì. Seryâ fizika-tehničnyh navuk

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A modern NPP is equipped by containment to hold radioactive substances and ionizing radiation bounded as design margins prescribe. Hydrogen mitigation system is used to protect containment against hydrogen fire and detonation. The system includes a scope of passive autocatalitic recombiners. Hydrogen is transformed into water, passing through said recombiners. The reaction occurs on catalyst surface. The main catalyst material is a palladium doped platinum. Hydrogen mitigation system parameters during severe accident are of interest. Wise admitted for NPP full scale tests are impossible, so the main analysis are calculations. Recombiner consists of catalytic block and stuck. The stuck provides reagents feeding and products evacuation enhancing natural convection transport. A model for calculations is suggested for recombiner with a plate-type catalyst block. The two free parameters of the model are chemical reaction intensity on catalyst and unit drag. Said parameters are estimated experimental data based on. Passive autocatalitic recombiner characteritics during severe ac- cident on AES-2006 NPP are calculated. The unit capacity is found not less that specification points. Catalyst temperatures, even the mean one, are above 500 °С, exhaust jet temperature exceeds 150 °С. Hydrogen content is high in the jet. Capacity increases linearly with hydrogen concentration at the unit entrance. Atmospheric temperature influence is low. Hydrogen mitigation system overall capacity is constant for uniform or not uniform hydrogen distribution in the containment. The calculated data may be used for recombiner work estimation during accident on AES-2006 NPP.

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Investigation of the iodine species on platinum catalyst used as hydrogen oxidation

Park²,

Yeon

2020

Int J Energy Res

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Understanding of the operation behaviour of a Passive Autocatalytic Recombiner (PAR) for hydrogen mitigation in realistic containment conditions during a severe Light Water nuclear Reactor (LWR) accident

Cited by 39 publications

References 21 publications

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Passive autocatalitic recombiner characteritics calculation during severe accident on AES-2006 NPP

Investigation of the iodine species on platinum catalyst used as hydrogen oxidation

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