Operation of ventilation and air-conditioning system at reactor building of unit 5 and 6 has been suspended since March 11, 2011. We have been carrying restoration works and checks to repair the system to prevent the equipment from degradation aiming for keeping the stable cold shutdown and improve the high-humidity environment in the building. Now the system is ready to operate and so we will start the operation of the system at 13:30 pm on January 11, 2012. The operation of the system leads air inside of reactor building to be exhausted through main exhaust stack of unit 5 and 6. However, we will monitor the exhausted air by radiation monitor (exhaust monitor) that is the same as the way we monitor them before March 11, 2011, and also we will exhaust the air through newly installed high performance particle filter placed at both intake and exhaust sides at air-condition equipment in reactor building to reduce the level of radioactive.
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