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Although most people are unaware of the problem, the mantles in such lamps are actually radioactive . . . possibly enough so to threaten the health of folks who depend on them.Those mantles emitted alpha particles which can’t penetrate paper or your external skin. In the 90s, Coleman switched over to using yttrium instead, which is NOT radioactive.Gas lantern mantles containing radioactive thorium have been used for more than 100 years. Although thorium was once believed to be indispensable for giving a bright light, non-radioactive mantles are now available.
Are Coleman mantles radioactive?
Those mantles emitted alpha particles which can’t penetrate paper or your external skin. In the 90s, Coleman switched over to using yttrium instead, which is NOT radioactive.
Are lantern mantles still radioactive?
Gas lantern mantles containing radioactive thorium have been used for more than 100 years. Although thorium was once believed to be indispensable for giving a bright light, non-radioactive mantles are now available.
The Best Radioactive Mantles for a Coleman Lantern
Images related to the topicThe Best Radioactive Mantles for a Coleman Lantern
Do Coleman mantles have thorium?
Sometime around 1990, the Coleman Company replaced the thorium in their mantles with yttrium. The yttrium mantle produces about 20% less light, but it lasts longer.
What are Coleman mantles made of?
The mantles are a ceramic mesh that encase the flame produced by the lantern. Typical mantles look like this: Mantles start out as silk fabric sacks impregnated with different oxides. The standard for decades has been the Welsbach mantle, which uses a mixture of thorium oxide, cerium oxide and magnesium oxide.
Do you have to pre burn mantles?
Yes, IMO you should always pre-burn followed by a burn-in as BigLew suggests.
How much thorium is in a mantle?
[5] Each mantle contained nearly 250 mg of thorium. [6] Though kerosene lanterns made with thorium are beginning to slowly decrease in number due to danger there are still many people who use them and are unaware of the dangers that they can cause.
What is the half life of thorium?
When a nucleus of thorium-232 absorbs, or “captures,” a neutron, it becomes thorium-233, whose half-life is approximately 21.83 minutes. After that time the nuclide decays through electron emission to protactinium-233, whose half-life is 26.967 days.
See some more details on the topic Are Coleman mantles still radioactive? here:
Incandescent Gas Lantern Mantles – Oak Ridge Associated …
Coleman gas lantern mantle … becoming airborne includes approximately 50 % of the beryllium and many of the radioactive decay products of the thorium.
Are camp lanterns radioactive? – The Straight Dope
A study conducted at Oak Ridge National Laboratory in 1981 concluded that using a Coleman-type lantern with thorium mantles every other weekend …
Radioactivity released from burning gas lantern mantles
Abstract. Gas lantern mantles contain thorium to produce incandescence when lantern fuel is burned on the mantle. Although only thorium is initially present on …
The Thorium Lantern: Your Opportunity for Retail Radiation …
Many mantles in retail lanterns still contain Thorium, with 50 million mantles sold in 2000 containing the radioactive element.
Where do you get thorium?
The most common source of thorium is the rare earth phosphate mineral, monazite, which contains up to about 12% thorium phosphate, but 6-7% on average. Monazite is found in igneous and other rocks but the richest concentrations are in placer deposits, concentrated by wave and current action with other heavy minerals.
When should I replace my lantern mantle?
Beyond replacing damaged mantles, American Gas Lamp Works recommends that you replace your mantles at least once per year. Changing your mantles annually will ensure that your lamp remains bright and fuel-efficient.
Why is thorium used on gas mantle?
Abstract. Gas lantern mantles contain thorium to produce incandescence when lantern fuel is burned on the mantle.
What is thorium dioxide used for?
Thorium Dioxide is a heavy, white, crystalline (sand-like) powder. It is used in ceramics, in nuclear fuels, as a catalyst, and in electrodes for arc welding.
Radioactive vs Non-Radioactive Gas Lantern Mantles
Images related to the topicRadioactive vs Non-Radioactive Gas Lantern Mantles
Where are peerless mantles made?
‘PEERLESS’ mantles were initially produced at Manila, Philippines. The founder or first owner sold the business in 2007 to another person who in turn sold the business, lock stock and barrel to us, it’s current owner, Indo Auerlicht Manufacturing Company.
Can I make my own lantern mantles?
Things You’ll Need
The mantle is usually made from artificial silk or rayon fabric. The fabric is completely soaked with an earth oxide. Thorium is an example of a rare earth oxide that can be used to saturate the fabric. The mantle is then placed inside of the lantern.
What can you use for lantern mantles?
Traditional fuel-burning lantern mantles can be can be powered by one of three main fuel types: liquid fuel, propane, or butane.
How are gas mantles made?
use of thorium
…in the commercial production of gas mantles. Such mantles are made by impregnating cotton or synthetic fibres with a 25 to 50 percent solution of Th(NO3)4 containing 0.5 to 1 percent each of thorium sulfate and cerous nitrate.
How long do lantern mantles last?
The mantles are fragile but if you store and transport the lantern upright in a case, they can last a season. The surest ways to damage mantles is to touch them or lay/drop the lantern on its side. I always keep a couple spares in the lantern case. 1 of 1 found this helpful.
Can you use a Coleman lantern without mantles?
As long as both mantles are intact, you can light them as many times as you want. It will light with a single mantle being whole, but the light isn’t very good, and it will smoke.
Are thorium mantles safe?
You have nothing to worry about. The trace amount of radioactivity in gas mantles which use thorium is extremely small.
What are fireplace mantels made of?
What Are Fireplace Mantels Made Of? Standalone floating mantels are commonly made from wood, while mantels found as part of a complete fireplace surround can commonly be found made from wood, stone, concrete and marble.
Is the mantle solid liquid or gas?
The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.
Why do we not use thorium reactors?
Thorium cannot in itself power a reactor; unlike natural uranium, it does not contain enough fissile material to initiate a nuclear chain reaction. As a result it must first be bombarded with neutrons to produce the highly radioactive isotope uranium-233 – ‘so these are really U-233 reactors,’ says Karamoskos.
The Best Radioactive Mantles for a Coleman Lantern
Images related to the topicThe Best Radioactive Mantles for a Coleman Lantern
Is thorium safer than uranium?
Benefits. Thorium is safer and more efficient to mine than uranium, thus making it more environmentally friendly. [5] The percentage of thorium found in its ore is generally greater than the percentage of uranium found in its ore, so it is more cost-efficient.
Is thorium more radioactive than uranium?
Thorium is more easily extracted than uranium. Liquid fluoride thorium reactors (LFTR) have very little waste compared with reactors powered by uranium. LFTRs run at atmospheric pressure instead of 150 to 160 times atmospheric pressure currently needed. Thorium is less radioactive than uranium.
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