At every nuclear electrical power plant, spent nuclear fuel is kept cool to avoid it from overheating that may trigger a self-sustaining atomic reaction leading to a meltdown.
At the Fukushima No. 1 nuclear plant there are seven vast clay-lined storage pits each measuring 60 meters long, 53 meters wide and 6 meters deep. Three layers of protective waterproof lining cover each pit.
Tokyo Electric Power (TEPCO) said last Friday that one of the systems, pool #2 that keeps spent atomic fuel cool, failed temporarily at the Fukushima No. 1 nuclear plant. On Saturday, TEPCO said that around 120 tons of contaminated water with an estimated 710 billion becquerel of radioactivity probably leaked into the ground under the power plant. The process of pumping the remaining 13,000 tons of the water in the pool #2 into other tanks would take days. How the water escaped will remain a mystery until they drain and check the faulty pits. TEPCO did not give any explanation about where the leaked contaminated water might have ended up.
On late Sunday, TEPCO confirmed that a second underground storage pool #3, has leaked three liters of radioactive water at the disaster-stricken Fukushima No. 1 power plant. However, the water level inside pool #3, has not gone down, indicating the leak is not that large. According to TEPCO, since this second leak is small, there are no plans to drain pool #3 into another storage area.
TEPCO is transferring the remaining water in pool #2 to two other pits. However, the water leaking from pool #3 is raising questions about the trustworthiness of all the pools and the risk to the environment.
Aside from the pools, the power plant has another headache. TEPCO stores tainted seawater perpetually needed to cool the melted fuel rods of the damaged reactors, in makeshift storage tanks. Unfortunately, the holding capacity of these makeshift tanks is running out quickly. On Sunday, Masayuki Ono, a senior TEPCO official said at a news conference that it is difficult for the plant to store all the tainted radioactive seawater in the temporary tanks.
At Fukushima, the site of the worst nuclear crisis in a generation, reactors went into meltdown and spewed radiation over a wide area polluting farmland and forcing tens of thousands of people to flee from their homes.
Although the natural disaster claimed around 19,000 lives, no one is officially recorded as having died as a direct result of the atomic catastrophe. However, activist groups such as Greenpeace say that the long-term health effects for people in the area are being vastly underestimated by a government pledged to a powerful nuclear industry. Although many voters in Japan distrust the technology, Prime Minister Shinzo Abe has openly said Japan must consider continued use of nuclear as a less-expensive energy source to power the world’s third-largest economy.
- Tepco finds second pit leaking in Fukushima (japantimes.co.jp)
- Fukushima fuel cooling system stops again:TEPCO (terradaily.com)
- Tepco Says Fukushima Plant Leaked 120 Tons of Radioactive Water – Bloomberg (bloomberg.com)
- UPDATE1: TEPCO confirms 2nd leak of radioactive water at Fukushima plant (english.kyodonews.jp)
- #Fukushima: Massive Leaks and Radioactive Fallout Continuing On a Daily Basis…For Years On End (fukushimaupdate.com)