NPCIL Corporate Profile - Nuclear Power Corporation of India Limited

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5 N P C I L ISO-14001 and IS-18001 Certification: All the nuclear power stations namely Narora, Kakrapar, Tarapur, Kalpakkam, Rajasthan and Kaiga have been certified for ISO-14001 (Environment Management System) and IS-18001 (Occupational Health and Safety Management System). This certification provides for : � Compliance with applicable environmental legislation and regulations along with a commitment for continual improvement. � Improved corporate commitment to environmental protection and conservation of resources. Typical ESL at one of the Nuclear Power Plants of NPCIL 10.15 39.60 3.12 0.42 0.75 1.47 1000 2400 0 TAPS RAPS MAPS NAPS KAPS KGS AERB Natural LIMIT Average 2500 2000 1500 1000 Average Radiation Dose from NPPs at 1.6 Km for Year (2010) 500 Dose Micro Sievert/year (µSv/y) Ensuring Environmental Protection Protection of the plant personnel, the environment and the public is an important consideration in the design, construction and operation of the nuclear power stations. The radiation source is adequately shielded, monitored in all operation and constantly maintenance works on the active systems are carried out strictly according to approved procedures. The release of radioctivity to the environment from nuclear power stations is in very small quantities, in any case well within the limits stipulated by the Atomic Energy Regulatory Board (AERB). The radiation dose due to actual releases is insignificant compared to the dose that from the natural radiation background. A person living at the fence post of a nuclear power station receives a radiation dose in 20 years equivalent to the radiation dose of a single chest X-ray indicating the adequacy of radiation control in nuclear power plants. It is interesting to compare the radiation exposures resulting from the operation of a nuclear power plant in India to the unavoidable natural background radiation exposure. Detailed surveys have shown that normal natural background radiation in different parts of the country varies from
N P C I L 2.07 mSv/year (a unit for radiation measurement) at Tarapur in Maharashtra to 3.1 mSv/yr at Narora in Uttar Pradesh. It is estimated that annual average maximum individual exposure at a plant boundary of nuclear power stations is less then 0.1 mSv/year. These small additional exposures are indistinguishable in the large variation of natural background that are observed and have no impact whatsoever on the health of the population. Environment Survey Laboratory with advanced monitoring equipments are set-up at each of the sites, before commissioning of the nuclear plants. These ESLs monitor, environmental matters like air, water, soil, crop, vegetation, fish, meat, food stuff etc., upto an area of 30 kms radius form the plant for radioactivity. The background level of radiation is established for comparison after commissioning of the plants. The data from the ESLs over the last 43 years of operation of nuclear power plants in India has shown that, there is no significant rise in radioactivity due to the operation of nuclear power plants over the natural background radiation. Safety of Nuclear Power Stations Safety has been given paramount importance in design, construction and operation of nuclear power stations. To ensure the safety of reactor, a defence-in-depth philosophy is followed, which leads to multiple barriers, diversity, redundancy, independence and fail-safe design of the safetyrelated systems. Safety of nuclear power stations is further ensured through sound design, using international standards and codes, stringent quality assurance, approved operating procedures, in-service inspection and maintenance of safety systems, etc. ACCIDENT INCIDENT DEVIATION 0 2 1 3 5 4 6 7 Major Accident Serious Accident Accident with off-site risk Accident without significant off-site risk Serious incident Incident Anomaly No safety significant International Nuclear Event Scale (INES) PRIMARY CONTAINMENT FUEL CLADDING EXCLUSION ZONE (Not to scale) SECONDARY CONTAINMENT FUEL HEAT TRANSPORT SYSTEM International Nuclear Event Scale International Atomic Energy Agency (IAEA) classifies nuclear events in the International Nuclear Event Scale (INES). INES is a 0 to 7 point scale. Events at level 0 are ‘deviations’ and have no safety significance. Events of level 1 to 3 are ‘incidents’. Events of level 4 to 7 are ‘accidents’. In India, no nuclear accident as defined by INES of IAEA has occurred so far over 362 reactor years of operation. 6
Page 1 and 2: CORPORATE PROFILE N P C I L NUCLEAR
Page 3 and 4: N P C I L NPCIL-Power Behind Nuclea
Page 5: N P C I L DETAILS OF OPERATING REAC
Page 9 and 10: N P C I L Future Nuclear Power Prog
Page 11 and 12: N P C I L NPCIL’s - Plants under

NPCIL Corporate Profile - Nuclear Power Corporation of India Limited

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