Hydrogen Recombiners

actually called this Passive autocatalytic recombiner (Wikipedia) but this is a word jumble

Most popular company that makes these is FramatoneFramatoneFramatone is a French nuclear reactor business, majority owned by France electric. It first formed to license PWR reactor designs, and then went on to produce more nuclear reactor based products. Originally licensing and construction, it supplies the entire reactor life cycle, including the design of the EPR Reactor & other tasks. (See Also: Hydrogen Recombiners - Framatone built the leading hydrogen recombiner) - which is a nuclear reactor based company.

Hydrogen Recombiners are nifty devices that are integral to BWRs (and really most reactors). In the event of the zirconium alloy claddingCladdingCladding is the thin walled metal tube that composes the outside of a fuel rod. It's purpose is to prevent corrosion of the fuel by the coolant & release of fission contents into the coolant. Although Zirconium alloy is common, aluminum and stainless steel is also used. Cladding Types Zirconium alloy has been used for so long due to it's properties being very good for nuclear reactors. * New research suggests that there is an alternative - SiGA cladding. This cladding is made from silicon car on fuel rods mixing with the water, hydrogen is created, and this gas can lead to devastating explosions (Fukushima ReactorFukushima ReactorThe purpose of this page is to inform people of what happened at Fukushima and the reactor incident, and to give information about the plant itself. (present tense will be used throughout this) Fukushima Reactor Fukushima Daiichi NPP is plant that hosts 6 BWR reactors, using Light Water. This resulted in Fukushima being capable of delivering a combined power of 4.7 GWe (4700 MWe). Units 1, 2, and 6 were made by GE, 3 & 5 by Tobisha, and 4 by Hitachi. All 6 reactors were designed by GE. Unit 3)

Recombiners have plates/pellets coated with platinum or palladium catalyst (palladium was also used in iron man????). On the surface of the catalyst, the molecules react chemically at a low temp & low hydrogen concentration - starting spontaneously at 1-2% hydrogen (the burning of hydrogen requires 4% with the flashpoint being much higher). The recombiner is a box open from the bottom and from the top.

The reaction inside of the recombiner reaches a very high temperature (not burning the hydrogen bc the hydrogen flammable concentration has not reached the point.) The reaction causes a positive feedback loop as hot steam rises, increasing airflow.

The recombiner is only efficient up to ~5 kg of hydrogen gas per hour, requiring multiple recombiners to maximum effectiveness in the event of a nuclear incident

(By Pavlin Groudev, Marina Andreeva, Stilyana Mladenova, Tsvetan Topalov - http://file.scirp.org/Html/1-1770213_65679.htm, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=67008270)