Tokyo: Data taken at Japan’s Fukushima Daiichi nuclear power plant suggest that plant’s key facilities might have been damaged by the March 11 quake itself rather than tsunami-caused power loss that failed the reactor`s cooling function, according to a utility source.
The revelation may call for a review of preparedness against quakes at various nuclear power stations in Japan, Kyodo reports.
Most nuclear power plants have primarily focused on securing auxiliary power supplies and embankment enhancement against tsunami after the Fukushima plant crisis, assuming that reactor facilities at the plant were unscathed by trembling.
On March 11, the power plant was shut down automatically following the magnitude-9 quake.
Within an hour, it was hit by at least two rounds of tsunami waves. The external power supply was then shut down, disabling the emergency core cooling system from injecting water.