Uranium-238 - Revision history

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	== Uranium-238 ==		== Uranium-238 ==

	[[File:Uranium03.jpg\|thumb\|right\|Uranium ore containing ~~uranium~~-238]]		[[File:Uranium03.jpg\|thumb\|right\|Uranium ore containing Uranium-238]]

	'''Uranium-238''' ('''U-238''') is the most common isotope of [[uranium]] found in nature, ~~with a natural abundance of approximately~~ 99.3%. It is a [[radioactive]] isotope with a half-life of about 4.468 billion years, making it useful for dating the age of the Earth.		'''Uranium-238''' ('''U-238''') is the most common isotope of [[uranium]] found in nature, accounting for over 99% of the element's abundance. It is a weakly radioactive isotope with a half-life of about 4.468 billion years, making it useful for dating the age of the Earth.

	== Properties ==		== Properties ==

	Uranium-238 is a [[heavy metal]] with a [[~~density~~]] ~~of about 19.1 g/cm_~~. ~~It is weakly radioactive~~ and undergoes [[alpha decay]] to form [[thorium-234]]~~. The decay chain~~ of ~~uranium-238, known as~~ the [[uranium series]], eventually leads to the formation of [[lead-206]].		Uranium-238 is a [[heavy metal]] with a high atomic number of 92. It is a dense, silvery-white metal that is malleable and ductile. U-238 is not fissile, meaning it cannot sustain a nuclear chain reaction by itself. However, it is fertile, meaning it can be converted into a fissile material, such as [[plutonium-239]], through neutron capture.

			== Decay and Radioactivity ==

			Uranium-238 undergoes alpha decay to form [[thorium-234]], which is part of the [[uranium decay series]]. This decay process releases an alpha particle, which consists of two protons and two neutrons. The decay chain eventually leads to the formation of [[lead-206]], a stable isotope.

	== Uses ==		== Uses ==

	~~Uranium~~-238 is not directly usable as ~~[[nuclear~~ fuel]] in ~~its natural form~~, ~~but~~ it ~~can be converted into~~ [[plutonium-239]] ~~through neutron capture and subsequent beta decay. Plutonium-239 is a fissile material that can be used~~ in ~~[[nuclear~~ reactors~~]] and [[nuclear weapons]]~~.		While U-238 is not directly usable as a fuel in nuclear reactors, it plays a crucial role in the production of [[plutonium-239]] in breeder reactors. U-238 is also used in the manufacture of [[depleted uranium]] for military applications, such as armor-piercing projectiles and tank armor.

	~~Uranium~~-238 is also used in [[depleted uranium]] applications, such as in armor-piercing projectiles and ~~radiation shielding, due to its high density~~.

	== ~~Occurrence~~ ==		== Role in Nuclear Power ==

	~~Uranium~~-238 is ~~found~~ in [[~~uranium ore~~]]~~s such as [[uraninite]] and [[carnotite]]. It~~ is ~~extracted through mining and then processed to separate it~~ from ~~other isotopes and impurities~~.		In nuclear reactors, U-238 can absorb neutrons to become plutonium-239, which is a fissile material. This process is utilized in [[breeder reactors]] to generate more fuel than is consumed, effectively "breeding" new fuel from U-238.

	== Health ~~and Safety~~ ==		== Environmental and Health Concerns ==

	~~While uranium~~-238 ~~is less radioactive than~~ other isotopes ~~of uranium~~, it is ~~still a~~ health ~~hazard~~ if ingested or inhaled. ~~Proper precautions must be taken when handling uranium~~ and ~~its compounds to prevent~~ exposure to ~~radiation~~ and ~~chemical toxicity~~.		Uranium-238, like other uranium isotopes, is toxic and poses health risks if ingested or inhaled. Its radioactivity can cause damage to living tissues, and long-term exposure can lead to increased risks of cancer. Environmental contamination from uranium mining and processing is a significant concern, requiring careful management and remediation efforts.

	== Related pages ==		== Related pages ==

	* [[Uranium-~~235~~]]		* [[Uranium]]
	* [[Nuclear ~~fission~~]]		* [[Plutonium-239]]
			* [[Nuclear reactor]]
			* [[Depleted uranium]]
	* [[Radioactive decay]]		* [[Radioactive decay]]
	* [[Nuclear reactor]]

	~~== References ==~~

	~~{{reflist}}~~

	[[Category:Uranium]]		[[Category:Uranium]]
	[[Category:Isotopes]]		[[Category:Isotopes]]
	[[Category:Nuclear materials]]		[[Category:Nuclear materials]]

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	'''Uranium-238''' ('''U-238''') is the most common isotope of [[uranium]] found in nature, with a ~~relative~~ abundance of 99%. ~~Unlike its counterpart~~ [[~~Uranium-235\|U-235~~]]~~, which is fissile and can sustain~~ a ~~nuclear chain reaction, U~~-~~238 is considered fertile~~, ~~meaning~~ it ~~can be converted into a fissile material through~~ the ~~process~~ of neutron absorption and subsequent nuclear reactions. This characteristic makes U-238 crucial in both civilian and military nuclear applications, including its role in nuclear power generation and nuclear weapons.		== Uranium-238 ==

			[[File:Uranium03.jpg\|thumb\|right\|Uranium ore containing uranium-238]]

			'''Uranium-238''' ('''U-238''') is the most common isotope of [[uranium]] found in nature, with a natural abundance of approximately 99.3%. It is a [[radioactive]] isotope with a half-life of about 4.468 billion years, making it useful for dating the age of the Earth.

	== Properties ==		== Properties ==
	U-238 ~~has~~ a ~~half-life~~ of ~~approximately 4~~.~~468 billion years, making it one of the slowest decaying isotopes~~. ~~Its long half-life contributes~~ to ~~its abundance in nature. When U-238 absorbs a neutron, it becomes~~ [[~~Uranium~~-~~239\|U-239~~]], ~~which then decays into~~ [[~~Neptunium-239\|Np-239~~]] ~~and finally into~~ [[~~Plutonium~~-~~239\|Pu-239~~]]~~, a fissile material used in nuclear reactors and weapons~~.
			Uranium-238 is a [[heavy metal]] with a [[density]] of about 19.1 g/cm_. It is weakly radioactive and undergoes [[alpha decay]] to form [[thorium-234]]. The decay chain of uranium-238, known as the [[uranium series]], eventually leads to the formation of [[lead-206]].

	== Uses ==		== Uses ==
	~~=== Nuclear Power ===~~
	In the context of nuclear power, U-238 plays a critical role in [[Breeder Reactor\|breeder reactors]]. These reactors are designed to generate more fissile material than they consume, using U-238 to breed Pu-239. This process significantly enhances the efficiency of uranium as a fuel source, extending the potential energy supply.

	==~~= Nuclear Weapons =~~==		Uranium-238 is not directly usable as [[nuclear fuel]] in its natural form, but it can be converted into [[plutonium-239]] through neutron capture and subsequent beta decay. Plutonium-239 is a fissile material that can be used in [[nuclear reactors]] and [[nuclear weapons]].
	U-238 is ~~also used~~ in ~~nuclear weapons, specifically in the construction of~~ [[~~Thermonuclear Weapon\|thermonuclear weapons~~]] ~~or hydrogen bombs~~. It is ~~used as a tamper material that reflects neutrons~~ and ~~increases the efficiency~~ of ~~the fusion reaction~~. ~~Additionally,~~ when ~~exposed~~ to ~~the intense neutron flux of a detonating nuclear weapon, U-238 can undergo fission, contributing~~ to ~~the weapon's overall yield~~.
			Uranium-238 is also used in [[depleted uranium]] applications, such as in armor-piercing projectiles and radiation shielding, due to its high density.

			== Occurrence ==

			Uranium-238 is found in [[uranium ore]]s such as [[uraninite]] and [[carnotite]]. It is extracted through mining and then processed to separate it from other isotopes and impurities.

			== Health and Safety ==

			While uranium-238 is less radioactive than other isotopes of uranium, it is still a health hazard if ingested or inhaled. Proper precautions must be taken when handling uranium and its compounds to prevent exposure to radiation and chemical toxicity.

	== ~~Health and Environmental Concerns~~ ==		== Related pages ==
	Exposure to uranium, including U-238, poses health risks due to its chemical toxicity and radioactivity. Ingestion or inhalation of uranium can lead to kidney damage and increased risk of cancer. Environmental concerns also arise from the mining and processing of uranium, which can lead to soil and water contamination.

	~~== Regulation and Safety ==~~		* [[Uranium-235]]
	The handling, transportation, and disposal of U-238 and uranium-containing materials are subject to strict regulations to protect human health and the environment. Safety measures include monitoring of exposure levels, use of protective equipment, and secure storage of radioactive waste.		* [[Nuclear fission]]
			* [[Radioactive decay]]
			* [[Nuclear reactor]]

	== ~~See Also~~ ==		== References ==
	* [[Nuclear Fission]]
	* [[Radioactive Decay]]
	* [[Nuclear Reactor]]
	* [[Nuclear Weapon]]

	~~[[Category:Nuclear Materials]]~~		{{reflist}}
	~~[[Category:Radioactive Isotopes]]~~

	~~{{Radiation-stub}}~~		[[Category:Uranium]]
			[[Category:Isotopes]]
			[[Category:Nuclear materials]]

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'''Uranium-238''' ('''U-238''') is the most common isotope of [[uranium]] found in nature, with a relative abundance of 99%. Unlike its counterpart [[Uranium-235|U-235]], which is fissile and can sustain a nuclear chain reaction, U-238 is considered fertile, meaning it can be converted into a fissile material through the process of neutron absorption and subsequent nuclear reactions. This characteristic makes U-238 crucial in both civilian and military nuclear applications, including its role in nuclear power generation and nuclear weapons.

== Properties ==
U-238 has a half-life of approximately 4.468 billion years, making it one of the slowest decaying isotopes. Its long half-life contributes to its abundance in nature. When U-238 absorbs a neutron, it becomes [[Uranium-239|U-239]], which then decays into [[Neptunium-239|Np-239]] and finally into [[Plutonium-239|Pu-239]], a fissile material used in nuclear reactors and weapons.

== Uses ==
=== Nuclear Power ===
In the context of nuclear power, U-238 plays a critical role in [[Breeder Reactor|breeder reactors]]. These reactors are designed to generate more fissile material than they consume, using U-238 to breed Pu-239. This process significantly enhances the efficiency of uranium as a fuel source, extending the potential energy supply.

=== Nuclear Weapons ===
U-238 is also used in nuclear weapons, specifically in the construction of [[Thermonuclear Weapon|thermonuclear weapons]] or hydrogen bombs. It is used as a tamper material that reflects neutrons and increases the efficiency of the fusion reaction. Additionally, when exposed to the intense neutron flux of a detonating nuclear weapon, U-238 can undergo fission, contributing to the weapon's overall yield.

== Health and Environmental Concerns ==
Exposure to uranium, including U-238, poses health risks due to its chemical toxicity and radioactivity. Ingestion or inhalation of uranium can lead to kidney damage and increased risk of cancer. Environmental concerns also arise from the mining and processing of uranium, which can lead to soil and water contamination.

== Regulation and Safety ==
The handling, transportation, and disposal of U-238 and uranium-containing materials are subject to strict regulations to protect human health and the environment. Safety measures include monitoring of exposure levels, use of protective equipment, and secure storage of radioactive waste.

== See Also ==
* [[Nuclear Fission]]
* [[Radioactive Decay]]
* [[Nuclear Reactor]]
* [[Nuclear Weapon]]

[[Category:Nuclear Materials]]
[[Category:Radioactive Isotopes]]

{{Radiation-stub}}