MCQ
Nuclear Safety MCQ - Practice Questions with Answers
Solve 92 Nuclear Safety questions for RAS/RPSC preparation.
Practice questions
Q11. AERB states that defence-in-depth, redundancy and diversity are inbuilt in the design of Indian nuclear power plants. 2. Indian nuclear power plants rely on backup cooling systems but do not use robust containment systems for confining radioactivity. 3. Emergency Preparedness and Response plans for nuclear power plants are tested and regularly revised. 4. AERB classifies radiological emergencies at nuclear power plants only into on-site and off-site emergencies, excluding plant emergencies. Which of the statements given above are correct?
Statement 1 is true. Statement 2 is false because robust containment systems are explicitly listed. Statement 3 is true. Statement 4 is false because AERB classifies emergencies into plant, on-site and off-site categories.
Q21. Protective actions in a radiological emergency can include evacuation and sheltering. 2. Potassium iodide may be used only as a supplement to evacuation or sheltering, as appropriate. 3. Sheltering always increases a person's radiation dose compared to remaining outside. Which of the statements given above are correct?
Statements 1 and 2 are correct: the NRC lists evacuation, sheltering and KI, with KI as a supplement. Statement 3 is incorrect because the NRC says sheltering can significantly reduce dose compared to staying outside.
Q31. AERB's regulatory requirements for nuclear and radiation safety for nuclear power plants in India are generally technology and entity neutral. 2. AERB issues an operating licence to a nuclear power plant only after satisfactory review during siting, construction and commissioning stages. 3. India's regulatory requirements specify a comprehensive Periodic Safety Review typically every five years. 4. AERB's routine inspections may be supplemented by special or reactive inspections when events or specific activities require them. Which of the statements given above are correct?
Statements 1, 2 and 4 are correct. The PIB release describes AERB requirements as generally technology and entity neutral, states that operation licensing follows satisfactory review through siting, construction and commissioning, and notes special or reactive inspections. Statement 3 is false because PSR is typically every ten years, not five.
Q41. AERB's regulatory safety documents are issued under the Atomic Energy (Radiation Protection) Rules, 2004. 2. AERB safety codes establish objectives and set requirements that shall be fulfilled to provide adequate assurance for safety. 3. Safety guides are documents meant only for public awareness and do not elaborate code requirements. 4. AERB's compliance framework is limited to nuclear power plants and does not cover radiation facilities and activities. Which of the statements given above are correct?
Statements 1 and 2 are correct. Statement 3 is false because AERB says safety guides elaborate safety-code requirements and recommended implementation approaches. Statement 4 is false because compliance to these documents is the basis for regulation of facilities and activities, not only NPPs.
Q51. INES is a worldwide tool for communicating the safety significance of nuclear and radiological events. 2. On INES, Levels 1-3 are called accidents and Levels 4-7 are called incidents. 3. Events without safety significance are classified as Below Scale / Level 0. Which of the statements given above are correct?
Statement 1 is correct: INES is meant for consistent public communication of safety significance. Statement 2 is incorrect; the IAEA classifies Levels 1-3 as incidents and Levels 4-7 as accidents. Statement 3 is correct: no-safety-significance events are Below Scale / Level 0.
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6Consider the following statements about the legal-regulatory framework for nuclear safety in India: 1. The Atomic Energy Act provides the basic regulatory framework for activities related to the atomic energy programme and the use of ionising radiation in India. 2. AERB has been designated as the competent authority for granting, renewal, withdrawal and revocation of consents for nuclear and radiation facilities. 3. Section 23 of the Atomic Energy Act empowers the regulatory body with administration of the Factories Act, 1948 in installations of the Department of Atomic Energy. 4. AERB's regulatory control over radioactive substances is limited to nuclear installations and does not extend outside such installations. Which of the statements given above are correct?
71. Indian nuclear power plants are designed, constructed, commissioned and operated with stringent safety requirements. 2. Because of these requirements, emergency preparedness and response plans are not necessary for nuclear power plants. 3. AERB states that emergency preparedness and response plans are tested and regularly revised. Which of the statements given above are correct?
81. AERB authorised inspectors may enter nuclear or radiation facility premises at reasonable hours for inspection during any stage of the consenting process. 2. Routine regulatory inspection of operating nuclear facilities is typically conducted 1-7 times in a year depending on hazard potential. 3. Construction-stage regulatory inspections focus only on financial accounting and land records. Which of the statements given above are correct?
9Consider the following statements about dose limits and radiological protection in Indian nuclear power plants: 1. AERB prescribes 20 mSv per year averaged over five consecutive years as the effective whole-body dose limit for a radiation worker. 2. The cumulative effective dose for a radiation worker must not exceed 100 mSv in the same five-year period. 3. The additional constraint on a radiation worker's dose is a maximum of 50 mSv in any one year. 4. For the public, AERB prescribes a dose limit of 1 mSv per year during normal operation of all facilities at a given site. Which of the statements given above are correct?
101. INES considers People and the Environment as one area of impact. 2. INES considers Radiological Barriers and Control as one area of impact. 3. INES considers agricultural price support as one area of impact. Which of the statements given above are correct?
11Consider the following statements about obligations under the Convention on Nuclear Safety: 1. Countries operating nuclear power plants have obligations aligned with IAEA Fundamental Safety Principles. 2. These obligations cover siting, design, construction and operation of nuclear installations. 3. The obligations expressly exclude siting of nuclear installations. Which of the statements given above are correct?
121. Emergency Preparedness and Response plans at nuclear power plants are developed as a measure of abundant caution. 2. Once prepared, such plans are not tested or revised. 3. Exercises to test emergency plans are conducted with involvement of relevant agencies identified to respond during an emergency. Which of the statements given above are correct?
13Consider the following statements about radioactive waste-management philosophy: 1. No waste in any physical form is released to the environment unless it is cleared, exempted or excluded from regulations. 2. Waste minimisation and volume reduction are given priority in radioactive waste management. 3. Low-level radioactive waste must always be stored permanently and can never be diluted and dispersed within authorised limits. Which of the statements given above are correct?
14The upcoming CBRN Centre of Excellence mentioned in the release is under which institute?
151. The Convention on Nuclear Safety aims to commit Contracting Parties operating land-based civil nuclear power plants to maintain a high level of safety. 2. The Convention obliges Parties to submit implementation reports for peer review at meetings normally held at IAEA Headquarters. 3. The Convention was adopted on 24 October 1996 and entered into force on 17 June 1994. 4. The depositary of the Convention is the Director General of the International Atomic Energy Agency. Which of the statements given above are correct?