|
Light Water (other)
Light water or Lightwater may refer to: Science * Deuterium-depleted water, which has a lower concentration of deuterium than occurs naturally on Earth * Water, especially water that is not heavy water ** Water, the coolant in a light-water reactor type of nuclear reactor Other uses * Lightwater, a town in Surrey, England See also * Semiheavy water Semiheavy water is the result of replacing one of the protium in light water with deuterium. It exists whenever there is water with light hydrogen ( protium, 1H) and deuterium (D or 2H) in the mix. This is because hydrogen atoms (hydrogen-1 and ..., the result of replacing one of the protium in light water to deuterium * Heavy water, a form of water that contains a larger than normal amount of the hydrogen isotope deuterium {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterium-depleted Water
Deuterium-depleted water (DDW) is water which has a lower concentration of deuterium than occurs naturally at sea level on Earth. DDW is sometimes known as light water, although " light water" has long referred to ordinary water, specifically in nuclear reactors. Chemistry Deuterium-depleted water has a lower concentration of deuterium (2H) than occurs in nature at sea level. Deuterium is a naturally-occurring, stable (non-radioactive) isotope of hydrogen with a nucleus consisting of one proton and one neutron. The nucleus of ordinary hydrogen ( protium) consists of one proton only, and no neutron. Deuterium atoms have about twice the atomic mass of normal hydrogen atoms as a result. Heavy water consists of water molecules with two deuterium atoms instead of the two normal hydrogen atoms. The hydrogen in normal water consists of about 99.98% (by weight) of normal hydrogen (1H). The production of heavy water involves isolating and removing deuterium-containing isotopologues wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food, energy or organic micronutrients. Its chemical formula, H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H2O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light-water Reactor
The light-water reactor (LWR) is a type of thermal-neutron reactor that uses normal water, as opposed to heavy water, as both its coolant and neutron moderator; furthermore a solid form of fissile elements is used as fuel. Thermal-neutron reactors are the most common type of nuclear reactor, and light-water reactors are the most common type of thermal-neutron reactor. There are three varieties of light-water reactors: the pressurized water reactor (PWR), the boiling water reactor (BWR), and (most designs of) the supercritical water reactor (SCWR). History Early concepts and experiments After the discoveries of fission, moderation and of the theoretical possibility of a nuclear chain reaction, early experimental results rapidly showed that natural uranium could only undergo a sustained chain reaction using graphite or heavy water as a moderator. While the world's first reactors ( CP-1, X10 etc.) were successfully reaching criticality, uranium enrichment began to develop from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightwater
Lightwater is a village in the Surrey Heath district of Surrey, England, about southwest of central London. Immediately surrounding towns and villages include Bagshot, Deepcut, Windlesham, Camberley, and West End, Woking. It is bounded to the north-west by the M3 motorway and to the north-east by the "Lightwater Bypass" (A322). To the south-east it is bounded by the "Red Road" (B311), while to the south-west there are vehicle-testing tracks owned by the Ministry of Defence. The village is adjacent to junction 3 of the M3 motorway. The nearest railway station is at Bagshot, on the line between Ascot and Aldershot. Lightwater is part of the civil parish of Windlesham, which has a population of 17,000 and also includes the neighbouring village of Bagshot. History Development Prior to development, the natural vegetation was part of the Surrey heathland as seen in Bagshot and Chobham Common. The region has been inhabited since pre-historic times with tumuli in the heathland to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiheavy Water
Semiheavy water is the result of replacing one of the protium in light water with deuterium. It exists whenever there is water with light hydrogen ( protium, 1H) and deuterium (D or 2H) in the mix. This is because hydrogen atoms (hydrogen-1 and deuterium) are rapidly exchanged between water molecules. Water containing 50% H and 50% D in its hydrogen contains about 50% HDO and 25% each of H2O and D2O, in dynamic equilibrium In chemistry, a dynamic equilibrium exists once a reversible reaction occurs. Substances transition between the reactants and products at equal rates, meaning there is no net change. Reactants and products are formed at such a rate that the co .... In regular water, about 1 molecule in 3,200 is HDO (one hydrogen in 6,400 is D). By comparison, heavy water D2O occurs at a proportion of about 1 molecule in 41 million (i.e., one in 6,4002). This makes semiheavy water far more common than "normal" heavy water. The freezing point of semiheavy water is close t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Water")
