Workers entered the Unit 1 reactor building for the first time since March 11 when the tsunami and subsequent hydrogen explosion damaged the roof of the building. The area they entered provides access to the pipes which inject water into the reactor. The workers were setting up air filtering equipment and ducting to begin cleaning the contaminated air. The workers were wearing air packs and protective clothing and were limited to working for 10 minutes before reaching radiation exposure limits. Several teams were needed to complete the equipment installation. The air will be filtered for several days to remove the particulates from the air in order to make the areas safer for the work of connecting heat exchangers to the pipes leading to the reactor.
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