MCQ
Nuclear Reactor Design MCQ - Practice Questions with Answers
Solve 96 Nuclear Reactor Design questions for RAS/RPSC preparation.
Practice questions
Q11. India's Stage-I nuclear power programme envisages natural-uranium, heavy-water moderated and cooled PHWRs. 2. Stage-II envisages Fast Breeder Reactors fuelled by plutonium produced in Stage-I. 3. Stage-III would comprise power reactors using U-233 and thorium as fuel. Which of the statements given above are correct?
All three statements are correct. NPCIL describes Stage-I as natural-uranium PHWRs, Stage-II as plutonium-fuelled Fast Breeder Reactors, and Stage-III as reactors using U-233 and thorium as fuel.
Q21. Indigenously built PHWRs form the backbone of the first stage of India's nuclear power programme. 2. Indian PHWRs use domestic natural uranium dioxide with 0.7 percent fissile U-235. 3. Indian PHWRs use heavy water as moderator and primary coolant. 4. Fast Breeder Reactors, not PHWRs, form the backbone of the first stage of India's nuclear power programme. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct according to BARC's description of India's first-stage PHWR programme. Statement 4 is incorrect because Fast Breeder Reactors belong to the second stage and use plutonium extracted from PHWR spent fuel.
Q3Consider the following statements about nuclear reactor design: 1. In a nuclear reactor, fuel is the material containing fissile atoms. 2. A coolant removes heat from the reactor core and transfers it for electricity generation. 3. The turbine is placed inside the reactor core as the moderator. Which of the statements given above are correct?
Statement 1 is correct: reactor fuel contains fissile material. Statement 2 is correct: the coolant carries heat away from the core for steam/electricity production. Statement 3 is incorrect: a moderator slows neutrons; a turbine is a power-conversion component outside the reactor core, not the moderator.
Q41. The technology development and design of PFBR were indigenously done by IGCAR. 2. PFBR was built and commissioned by BHAVINI. 3. PFBR incorporates high-temperature liquid sodium coolant technology. 4. PFBR is a conventional thermal reactor whose main design feature is ordinary-water cooling. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct. PIB identifies IGCAR as the indigenous design and technology-development centre, BHAVINI as builder and commissioning agency, and liquid sodium coolant technology as a PFBR feature. Statement 4 is incorrect because PFBR is explicitly contrasted with conventional thermal reactors and is not ordinary-water cooled.
Q51. In a PWR, the pressurizer keeps reactor-vessel water under very high pressure to prevent boiling. 2. In a BWR, water boils inside the pressure vessel and produces steam. 3. A BWR needs a steam generator because its turbine steam is produced in a separate secondary circuit. 4. In a PWR, steam for the turbine is produced in a steam generator. Which of the statements given above are correct?
Statements 1, 2 and 4 are correct according to the NRC. Statement 3 is false because the NRC BWRs do not have a steam generator; water boils in the pressure vessel and the steam is sent to the turbine.
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More questions
61. AHWR300-LEU is a 300 MWe vertical pressure-tube reactor. 2. AHWR300-LEU is cooled by boiling light water and moderated by heavy water. 3. AHWR300-LEU employs natural circulation for heat removal from the reactor core during operating and shutdown conditions. 4. AHWR300-LEU relies on primary coolant pumps as unavoidable major components for core heat removal. Which of the statements given above are correct?
7Consider the following statements about AHWR fuel and features: 1. AHWR uses only enriched uranium dioxide as fuel. 2. AHWR utilizes (Th, U-233)MOX and (Th, Pu)MOX as fuel. 3. AHWR incorporates several passive safety features and inherent safety characteristics. Which of the statements given above are correct?
8Consider the following statements about boiling water reactor design: 1. In a BWR, steam generated in the core is used directly to drive a steam turbine. 2. Routine BWR reactivity control is normally achieved by dissolving boric acid in the boiling core coolant. 3. The BWR described by NPCIL has negative fuel and moderator temperature coefficients and a negative void coefficient. 4. BWR control blades enter from the bottom of the reactor vessel. Which of the statements given above are correct?
91. Light water reactors are divided into PWRs and BWRs. 2. PWRs produce turbine steam in separate steam generators. 3. BWRs use steam produced inside the reactor core directly in the steam turbine. 4. All light water reactors use natural uranium fuel without enrichment. Which of the statements given above are correct?
10Consider the following statements about Kudankulam and PFBR: 1. Kudankulam Nuclear Power Plant is located in Tamil Nadu. 2. Kudankulam Units 5 and 6 are 700 MW PHWR units. 3. The Prototype Fast Breeder Reactor at Kalpakkam uses ordinary water as coolant. Which of the statements given above are correct?
111. AHWR incorporates several passive safety features and inherent safety characteristics. 2. AHWR is designed without passive systems, so every core-cooling function depends on off-site electric power. 3. In AHWR, the emergency core cooling system actuates by passive means during a loss-of-coolant accident. 4. AHWR's reactor protection system consists of only one shutdown system. Which of the statements given above are correct?
12Consider the following statements about India's three-stage nuclear power programme: 1. Stage I envisages natural-uranium, heavy-water moderated and cooled PHWRs. 2. Spent fuel from Stage I PHWRs is reprocessed to obtain plutonium. 3. Stage II envisages fast breeder reactors fuelled by plutonium produced in Stage I. 4. Stage III would comprise power reactors using uranium-233/thorium as fuel. Which of the statements given above are correct?
131. In a Pressurized Water Reactor, the primary coolant transfers heat to the secondary coolant in a steam generator without mixing the two fluids. 2. In a Boiling Water Reactor, steam produced inside the reactor core is used directly in the turbine. 3. All light water reactors can sustain a chain reaction with natural uranium fuel because light water absorbs fewer neutrons than heavy water. 4. Pressurized Water Reactors use heavy water, not light water, as both coolant and moderator. Which of the statements given above are correct?
141. In an integral Pressurized Water Reactor, primary circuit components are placed within the reactor pressure vessel. 2. The integral PWR layout eliminates the need for primary circuit pipework with the intention of enhancing safety and reliability. 3. The IAEA describes the integral PWR as a type of small modular reactor currently under development in a number of countries. 4. In an integral PWR, the turbine and generator are placed within the reactor pressure vessel. Which of the statements given above are correct?
15Consider the following statements about indigenous reactor design in India: 1. The Government of India approved 10 indigenous PHWR units with a total installed capacity of 7,000 MW as a single project. 2. KAPP-3 and KAPP-4 are among NPCIL's 700 MWe indigenous pressurised heavy water reactors. 3. KAPP-4 had achieved first criticality on 17 December 2023. 4. Kakrapar Units 3 and 4 are imported boiling water reactors supplied as turnkey foreign projects. Which of the statements given above are correct?