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boiling water reactor and pressurised water reactors are mcq

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A reactor capable of converting a ferrite material into fissile isotopes is called. This is done through uranium enrichment—which increases the concentration of Uranium-235 from 0.7% to around 4%. The coolant water boils in the core of the reactor. Babcock & Wilcox Pressurized Water Reactors Gary W Castleberry, PE. The difference between the two is that water is heated in the reactor core in a boiling water reactor. These short objective type questions with answers are very important for Board exams as well as competitive exams. Description . See typical animated images below and learn how they generate electricity. In a BWR, the reactor core heats water which turns to steam and then drives a steam turbine. The light water reactors are of two types viz. Boiling Water Reactors (BWR) and Pressurized Water Reactors (PWR). Boiling water reactors. Pressurized-Water Reactor (PWR) (Click for Larger Version) View an Animated Image of a Pressurized Reactor . This is because light water absorbs too many neutrons to be used with natural uranium, so the fuel content of fissile Uranium-235 must be increased. Pressurized water reactors (PWRs) and boiling water reactors (BWRs) are classified as light water reactors (LWRs). In boiling water nuclear reactors (BWRs), the heat generated by the splitting of uranium atoms is used to boil water within the reactor … A boiling water reactor (BWR) uses demineralized water as a coolant and neutron moderator. Of the 110 operational nuclear power reactors in the United States, 73 of these reactors are pressurized water reactor (PWR) designs. In the United States LWRs are used in the production of electric power. Q1. a) Regenerative reactor. b) Is inert. Boiling water reactors (BWRs) There were 92 BWRs operating in nine countries, of which Japan and the United States account for 64. B OTEC. The boiling water reactor does not use steam generators or pressure compensators. Boiling water reactors must use enriched uranium as their nuclear fuel, due to their use of light water. These reactors pump water into the reactor core under high pressure to prevent the water from boiling. The water in the core is heated by nuclear fission … This hot radioactive water flows through tubes in a steam generator. Light Water Reactors. There can be two to four steam generators for each reactor unit. Q2. Pressurised water reactor isdesigned (a) for boiling pi water in the core (b) to use liquid sodium metal as coolant (c) to use intermediate coolant (d) to prevent the water coolant from boiling in the core (e) to eliminate the coolant loop of the pressurised water. • PWRs keep water under pressure so that it heats, but does not boil. B. In PWRs the coolant water is used as a moderator by letting the neutrons undergo multiple collisions with light hydrogen atoms in the water, losing speed in the process. 82. Answer/ Hint A nuclear power reactor uses fission reactions to produce thermal energy that is converted to electrical energy. The reactor's first circuit operates at a pressure of 70 atmospheres against 160 atmospheres used by PWR reactors (pressurized water reactor). Which among the following is not an adverse environmental impact of tidal power generation? ... 9 Boiling water reactor and pressurised water reactors are: A Solar reactor. The objective of this publication is to provide specific guidance for accident analysis for nuclear power plants with pressurized water reactors, taking into account the specific design features of these reactors. As of 2016, 69 out of 104 commercial nuclear power plants licensed by … One common class of nuclear reactor is the light water reactor which uses light water as a moderator and as a coolant. See Fig. It requires lower operating temperatures, even at fuel rods. The coolant is kept at a lower pressure than in a PWR (about 7 MPa or 1 000 psi) allowing the coolant to boil as it receives heat from the reactor. c) Has high specific heat. Heat is produced by nuclear fission in the reactor core, and this causes the cooling water to boil… It is classified as a Light Water Reactor. Q3. Free download in PDF Non Conventional Energy Sources Multiple Choice Questions and Answers for competitive exams. In a pressurised water reactor (PWR) A. There are two types of light water reactors: the pressurized water reactor and the boiling water reactor. Light Water Reactors Boiling Water Reactor This section describes boiling water nuclear reactors . This form of light water nuclear reactor BWR is one of the main reactors and the second one to Pressurized Water Reactor (PWR). In the United States, steam generators are only found in pressurized-water reactors, one of the two types of U.S. reactors. As an effect of this, only localized boiling occurs and steam will recondense promptly in the bulk fluid. General Information Boiling water nuclear reactors are a type of light water reactor . Schematic diagram of a boiling water reactor (BWR) - German only Source: Deutsches Atomforum e. V.. Like pressurised water reactors, boiling water reactors (BWR) belong to the design of light-water-reactor.. Hydrogen is preferred as better coolant in comparison to C02 because former. (a) Nuclear reactor (b) Wind mills (c) Biogas reactor (d) Solar cell. c) Breeder reactor. a) Is lighter. The Pressurized Water Reactor (PWR) is one of the first reactors developed for commercial power and is the most common nuclear reactor type. d) Boiling water reactor . C. The coolant water is pressurised to prevent boiling of water in the core. In a pressurized-water reactor, the reactor core heats water and keeps it under pressure to prevent the water from turning into steam. A steam generator is a giant cylinder filled with nonradioactive water (or clean water). At present, the PWR are most popular kind of nuclear reactors.Key difference between a BWR and PWR is that. There are two types of typical reactors in the United States: Pressurized-water reactor and Boiling-water reactors. Pressurized-water nuclear reactors. This means that regular (light) water acts as the coolant, moderator, and reflector for the core. Each pressurized water reactor has at least two steam generators. Pressurized water reactors, like all thermal reactor designs, require the fast fission neutrons to be slowed (a process called moderation or thermalizing) in order to interact with the nuclear fuel and sustain the chain reaction. 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