On Sunday and Monday, workers at Fukushima Daiichi carried out operations at the Unit 2 reactor to drill a new penetration on the first floor to insert a dosimeter, thermometer, and camera. The perforation was drilled in the RHR heat exchanger area on the north side of the reactor building.
Workers found problems as they ran into steel pipes and metal grates which made it difficult to insert survey instruments. TEPCO is planning a survey that will measure the amount of radiation to ensure that no fuel is melting.
Source: Tokyo Web