Water c. Paper d. Fuel Ans.16. a) Regenerative reactor. All nuclear plants have some form of reactor protection system. [coolant water is pressurised to prevent bulk boiling of water in the core.] Q17. Fire extinguisher-a. Nuclear Power-> Nuclear Power Plant-> Types of Reactors-> Pressurized Water Reactor Pressurized Water Reactor – PWR. In both types, water is converted to steam, and then recycled back into water by a part called the condenser, to be used again in the heat process. c) Breeder reactor. c) Has high specific heat. Light water is much more abundant than heavy water, as it makes up 99.99% of natural water.. a) Ordinary fluid. Pressurized water reactors use a reactor pressure vessel (RPV) to contain the nuclear fuel, moderator, control rods and coolant. The reactor pump which acts as a reactor coolant pump is a centrifugal pump, which circulates the coolant necessary to carry away the decay heat. a) Fast breeder. Helium B. Deuterium C. Heavy hydrogen D. Tritium ANS:- D. 157) _____ have the same mass number, but different nuclear charge. 155) The most commonly used nuclear fuel in boiling water reactor is. The BWRX-300 is a 300-megawatt electric water-cooled natural circulation SMR with passive safety systems, according to the release. A large number of boiling-water reactors have been designed in various countries—for example, the Oyster Creek vessel-type boiling-water reactor (USA), with a power rating of 515 MW, in which the devices for steam separation and the multiple circulation … The control rods inside are used to … See Fig. b) Heavy water. A fourth reactor, one of those that had been shut down prior to March 11, experienced a fire Tuesday that threatened to evaporate water in a storage pool for spent nuclear fuel. A. Coolant water is allowed to boil in the core of the reactor B. Coolant water, after being heated in the reactor core, generates steam in a boiler C. Pressurised water is pumped into the core D. Fuel and the coolant are thoroughly mixed to form a homogeneous solution Q3. The Boiling Water Reactor (BWR) The Boiling Water Reactor (BWR) BWRs actually boil the water. a) Is lighter. c) Boiling water. c) Molten lead. POWER SYSTEM MCQ_25_5( NUCLEAR POWER STATION) byelectricalworld August 15, 2019electricalworld August 15, 2019 The coolant water is pressurised to work as moderator. The following section consists of Chemistry Multiple Choice questions on Nuclear Power Engineering. These are mainly used at all Canadian nuclear stations. The water in the core is heated by nuclear fission … C. The coolant water is pressurised to prevent boiling of water in the core. Bring down the temperature of fuel c. Both (a) & (b) d. None of these Ans.15. As a fuel, it uses natural uranium because, in a pressurized water reactor, the coolant can be used for boiling normal water in a different loop. These reactors signify about 12% of the nuclear reactors globally. Q15. A. Air c. Heat d. All of these Ans.14. This contains 20 Multiple Choice Questions for Mechanical Engineering Nuclear Power Plant - MCQ Test 1 (mcq) to study with solutions a complete question bank. Approximately 22% of the nuclear reactors installed in the different nuclear power plants use the BWR reactor.. [coolant water boils in the core of the reactor.] A. enriched uranium B. natural uranium C. plutonium D. monazite sand ANS:- A. [use of moderator is not required.] In the boiling water reactor (BWR), the water which passes over the reactor core to act as moderator and coolant is also the steam source for the turbine. B. reactor fuel assemblies, the boiling water reactor fuel bundle is enclosed in a fuel channel (6) to direct coolant up through the fuel assembly and act as a bearing surface for the control rod. 31. Boiling Water Reactor. Reactor protection system (RPS) A reactor protection system is designed to immediately terminate the nuclear reaction. The team created a 3D-printed part compliant with reactor safety regulations for deployment in a commercial reactor. The SMR model is the tenth evolution of the firm’s Boiling Water Reactor designs. Ina pressuried water reactor (PWR)..... A. d) Sodium graphite . B. 1. Hydrogen is preferred as better coolant in comparison to C02 because former. GE Hitachi anticipates the design to require less capital costs than similar SMR designs or existing large nuclear reactor designs. A BWR plant layout comprises the reactor vessel at its centre that is surrounded by the shield wall of reinforced concrete. ORNL additively manufactured channel fasteners for Framatome’s boiling water reactor fuel assembly using a micro-welding process. Cut off the supply of air b. A. Light Water Reactors Boiling Water Reactor This section describes boiling water nuclear reactors . The thermal efficiency of a nuclear power plant using a boiling water reactor is higher than of a plant using a pressurized water reactor. The most commonly used nuclear fuel in boiling water reactor is o natural uranium o enriched uranium o monazite sand o plutonium Ans: B D. Plutonium-239 can be used as a fuel in another type of nuclear reactor. General Information Boiling water nuclear reactors are a type of light water reactor . Of the 104 operational nuclear power reactors in the United States, thirty-five are boiling water reactors (BWR). D. None of the above The coolant water boils in the core of the reactor. b) Pressurized water. a nuclear reactor in which the core is cooled by a boiling coolant, usually water. Q1. When gas burns, it produces heat and light b. As mentioned before, light water is used as the coolant and moderator for a boiling water reactor. D. inside the reactor, enriched uranium produces heat energy from a fission chain reaction that boils the water to create steam. For combustion _____is necessary a. These reactors pump water into the reactor core under high pressure to prevent the water from boiling. A boiling water reactor or BWR (boiling water reactor) is a type of nuclear reactor.It is the second most used type of reactor in nuclear power plants in the world.. A reactor capable of converting a ferrite material into fissile isotopes is called. … In addition, the fuel channel protects the fuel during refueling operations. d) Hydrogen gas . Westinghouse is the world leader in delivering Pressurized Water Reactor (PWR) nuclear fuel. 1) coolant water boils in the core of the reactor., 2) fuel is natural uranium and heavy water acts both as moderator & coolant., 3) use of moderator is not required, 4) coolant water is pressurised to prevent bulk boiling of water in the core, 5) NULL d) Is a good conductor . Answered - [fuel is natural uranium and heavy water acts both as moderator & coolant.] Gas-cooled Reactors Air b. C. Control rods are used to slow down plutonium-239. b) Fast breeder reactor. Q16. The BWR design 8 development has comprised six stages beginning with the BWR/1 (embodied by the example of the Dresden plant in the United States, 180 MWe commissioned in 1955) through to the BWR/6 at 1100 MWe pioneered in the early 1970s. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has (A) High neutron absorption cross-section (B) Low moderating efficiency (C) High neutron scatter cross-section (D) Low neutron absorption cross-section In boiling water nuclear reactors (BWRs), the heat generated by the splitting of uranium atoms is used to boil water within the reactor … Boiling water reactor uses the following as moderator, coolant and working fluid. The BWR is a power reactor; that is, it is designed to generate electrical power. One disadvantage of using photovoltaic cells to power a domestic water heater is that A. In a pressurised water reactor (PWR), the. (a) 17. Fuel b. Coolant and Moderator. The BWR’s distinguishing feature is that the reactor vessel serves as the boiler for the nuclear steam supply system. 1 Country with the highest uranium resources; 2 Nuclear power plants approximately consume how many gallons of water per MWh; 3 Reactors which don’t need a moderator; 4 Boiling water reactor contains number of loops; 5 AGR reactors use which coolant By breaking the nuclear chain reaction, the source of heat is eliminated.Other systems can then be used to remove decay heat from the core. Multiple fuel lattice designs continue to be delivered to Westinghouse and Combustion Engineering (CE) plants with unmatched global experience for decades. Q2. Question is ⇒ Boiling water reactor employs, Options are ⇒ (A) boiler, (B) direct cycle of coolant system, (C) double circuit system of coolant cycle, (D) multi pass system, (E) single circuit system., Leave your comments or Download question paper. Electrical Engineering MCQ. Take the Quiz for competitions and exams. b) Is inert. 1 Reactor pump Depending on the type of reactor plant, it is necessary to distinguish between pressurised, boiling and heavy water reactor pumps, and liquid-metal reactor pumps. It takes place at a lower pressure as in PWR, what allows the water to boil inside the pressure vessel producing the steam that runs the turbines. Boiling-water reactors may be used in single-loop schemes of atomic power plants, in which steam produced in the reactor is conducted directly to a turbine. Boiling-Water Reactor . 16MPa). Fuel is natural uranium and heavy water acts both as moderator & coolant B. Coolant water boils in the core of the reactor C. Coolant water is pressurised to prevent bulk boiling of water in the core D. Use of moderator is not required Answer: Option C In the boiling water reactor the same water loop serves as moderator, coolant for the core, and steam source for the turbine.. Boiling water reactor – BWR A boiling water reactor (BWR) is cooled and moderated by water. d) Boiling water reactor . They are cooled and moderated by high-pressure liquid water (e.g. The nuclear power plant at Tarapur has the following reactor. General Electric is the sole designer and manufacturer of BWRs in the United States. 156) Which one is radioactive in nature? C. Control rods are inserted into the water to start the fission chain reaction begins, water boils and is turned into steam. (d) 15. A moderator is used to absorb plutonium-239. 10. a. These reactors use heavy water like both coolant & moderator. More than 65% of the commercial reactors in the United States are pressurized-water reactors or PWRs. Rapid combustion is a. 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