Kyodo: No. 4 fuel pool warms — Backup pump stopped Wednesday — Main pump stopped Tuesday — Tepco expects temperature to start falling
Subscription Only: Water in Fukushima No. 4 spent fuel pool warms after pump troubles
June 6, 2012
The operator of the crippled Fukushima Daiichi nuclear power plant said Wednesday that the temperature of water inside the No. 4 unit’s spent fuel pool rose to 42 C as of 5 p.m. following problems with the water circulation system pumps.
One of two pumps which stopped was later reactivated, and the water temperature is expected to start falling [...]
There are two pumps to cool water [...] But the main pump stopped working on Tuesday, and the backup pump stopped on Wednesday.