Japan:TEPCO to install cooling system at No. 4 reactor
Laaska News June 11,2011
The operator of the damaged Fukushima nuclear power plant is preparing to install a circulatory cooling system for a spent nuclear fuel pool in the plant’s Number 4 reactor building.
The Tokyo Electric Power Company, or TEPCO, has been using a vehicle to try to cool the pool, which contains 1,535 fuel rods, the most among the plant’s 6 reactors. The rods continue to generate high heat, raising temperatures in the pool above 80 degrees Celsius.
TEPCO plans to start operating the cooling system as early as July to pump water out of the pool to a heat exchanger and return the water to the pool as coolant.
On Friday, workers entered the 4th floor of the building for the first time since a hydrogen blast on March 15th severely destroyed the building and damaged water pipes connected to the pool.
The workers checked the pipes and monitored radiation levels. Data on these matters is to be used to study routes for injecting water into the pool.
TEPCO began operating a similar circulatory cooling system at the plant’s Number 2 reactor on May 31st.