Saturday, May 7, 2011

Ventilation system activated in the unit 1 reactor building

The system primarily targets free I-131 in the air within the reactor building, though i don't understand why it wouldn't remove other varieties of isotopes as well.  In any case, they are touting a possible 96.666 reduction in free air Iodine if the system performs as expected.

How the reduction of iodine impacts the total exposure rates within the building remains to be seen.

During the operation which lasted 26 minutes, exposure rates measured between 8 and 93 milliSieverts per hour at different locations within the unit.  Employees were exposed to between 0.31 to 3.16 millisieverts.

Within a few days, Tepco should be following up with new radiation measurements from within the building to see how effective this makeshift ventilation system is.

Story from The Daily Yomiuri


  1. Ventilation is supply to and removal of air from a space to improve the indoor air quality. Good atmosphere makes good results. Air circulation plays an important role in keeping the atmosphere clean and safe. Air which comes through the openings of the buildings gets heated and circulates in the atmosphere with dusts and gaseous particles. It never gets out of the workplace. You have to do something to push it outside.

  2. The ventilation system effort was a necessary exercise, and i understand the importance of the task. I think the context surrounding this post was my disappointment with the lack of reporting on outside venting that we all witnessed on live cam, and subsequent hailing of this ventilation system as the reason why readings will be low enough to enter the building. Two separate things going on, and it's hard to determine how much one was impacted from the other.