August 2, 2011 1:22:14 am
The level of radiation that four workers were exposed to at the Kakrapar Atomic Power Station-2 or KAPS unit 2 in Gujarat is not significant enough to cause any harm to their health,the Nuclear Power Corporation of India Limited (NPCIL) has said.
On May 30,KAPS-2 was operating normal and,as planned,painting work was in progress at the spent fuel transport duct (SFTD). Seven contract workers were deployed to do the painting and all of them had been trained in radiation aspects prior to taking up the work. Other operations in this area were kept on hold. However,inadvertently a fuel discharge operation was initiated which resulted in increased radiation field in the SFTD area. This led to radiation exposure of four workers, said an NPCIL official. Subsequently,the fuel discharge operations were suspended and the workers removed.
According to NPCIL,the exposures to the four workers were recorded in the range of 23.23 milli-Sieverts (mSv) to 90.77 mSv. The level of exposure of the four workers is significantly lower than that what can cause adverse health effects. However,a comprehensive medical check up of these workers has been carried out and no adverse effect has been detected. The workers continue to perform their normal duties,albeit in other areas of the station, said an official statement from the NPCIL. The detectable health effects are observed beyond 500 mSv of radiation dose.
Due to this exposure,the four workers wont be given a job in the radiation area for a year, said another NPCIL official.
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The incident was also reported to the Atomic Energy Regulatory Board (AERB),which conducted a detailed review and reported it to the International Atomic Energy Agency (IAEA) as per the existing procedure.
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