Tag Archives: GE

Reactor 1 Core damaged, conundrum!

Tokyo Electric Power Company admits Fukushima Daiichi’s Reactor 1 has a damaged core.

It would explain the high levels of radioactive water coming from the building.  TEPCo thinks the core is breached, allowing radioactive steam to enter the containment vessel.  That’s mixing with the water in the containment vessel, which is also leaking.  To make the problem worse, the fuel rods in the core are still partially exposed, and breaking down.

TEPCo wants to continue injecting water, which they are doing at a rate of 600 tons per hour.  The Japanese Nuclear and Industrial Safety Agency is warning that they think Reactor 1 is damaged so much that it can not handle anymore water injection.  If TEPCo is injecting water at 600 tons per hour, and they still can’t cover the exposed fuel rods, obviously the water is leaking out faster than they can put it in.  That suggests sizable damage.

So, TEPCo is dealing with a conundrum; adding more water could further damage the structure, making things worse, but not injecting water will expose more fuel rods, making things worse.

Reactor 4 Spent Fuel pool in trouble!

Tokyo Electric Power Company is worried about Reactor 4, at the Fukushima Daiichi nuke plant.  They think the spent fuel pool has been too damaged by the 9.0 quake, and the many aftershocks, that they can’t inject anymore water to keep fuel rods cool.

On 22 April, the temperature shot up 50 degrees Celsius, above normal, and 200 tons of water had to be injected.  TEPCo is now monitoring the structure of the building as well as the spent fuel pool temps.  The spent fuel pool holds more than 1,000 fuel rods, including active rods that had just been removed from Reactor 4, for scheduled maintenance, before the 11 March disasters.

Radioactive Concrete Block found at Fukushima Daiichi!

Tokyo Electric Power Company says crews working at Fukushima Daiichi nuclear plant found 30 x 30 centimeter (11 x 11 inches) concrete fragment, that’s radioactive.

The small block is emitting 900 millisieverts per hour of radiation.  It was placed in a nuke waste container.  TEPCo says the concrete came from Reactor 3, after its hydrogen gas explosion.

Earthquakes, Tsunamis, Nuke disasters, now Typhoons!

Japan has gone through a lot in the past month.  But typhoon season is on it’s way.  Nishiyama Hidehiko, of the Nuclear and Industrial Safety Agency, said nuke plant operators are now preparing for typhoon season.

They believe preparations will be complete by the end of the month.  Officials say the nuke plants are designed to withstand a typhoon, but isn’t that what they said about earthquakes and tsunamis?

Another factor is that some of those nuclear plants have been damaged by the 11 March, 9.0 quake and tsunami.  Wouldn’t that comprise their strength?  Even this morning, 22 April, Fukushima Daiichi was hit by yet another aftershock, 5.6 magnitude.

Fukushima Daiichi is right on the coast, and Tokyo Electric doesn’t think they can get the plant stabilized enough for a cold shut down for at least six to nine months. The Typhoon season is here, now.  Typhoons start hitting Japan as early as May, and the season peaks in September.

 

Two U.S. Nuke Plants shut down, one for no apparent reason

At least two nuclear plants in the United States have been automatically shut down this week.  A nuclear plant in Virgina, and a nuclear plant in Georgia.

In Surry, Virginia, a nuke plant was hit by tornadoes.  It shut down automatically, and is now undergoing repairs to its electrical switchyard.

A nuke plant in Georgia automatically shut down, for no reason.  The plant remains off line while an investigation continues to find out why the automatic systems shut it down.  The plant is near Waynesboro, Georgia.

Radiation Evacuation Zone expanded!

Not only has the Japanese government made it a legal offense to enter the evacuation zone around Fukushima Daiichi, they have expanded the zone as well.

Because of high radiation build up, towns outside the original 20km (12.4miles) zone will be evacuated.  The towns are Katsurao, Namie, Iitate and some areas of Kawamata and Minamisoma.  Residents have until the end of May to leave.

Fukushima says No to TEPCo!

The prefectural government of Fukushima said no to allowing Tokyo Electric Power Company to resume any nuke plant operations.  ”A resumption of plant operations must be impossible.”-Sato Yuhei, Fukushima Governor

Governor Sato made the statement after a 15 minute meeting with TEPCo president Shimizu Masataka.  TEPCo had tried to meet with the state government of Fukushima twice before, and was unofficially told to take a hike both times.  This time Fukushima officials made it official.  They told TEPCo there is no way they will allow them to resume any nuclear power functions at the damaged Fukusima Daiichi plant.

TEPCo lays off employees inorder to pay for Nuke plant damages

Tokyo Electric Power Company says it must cut wages and salaries in order to meet expected compensation payments due to the Fukushima Daiichi disaster.

Wages would be cut by 5%, with bonuses cut in half.  Salaries will be cut by 20%. TEPCo will also reduce the number of employees by 100 each year, for the next five years.

 

Radiation into Pacific Ocean 20,000 times safe limits

Tokyo Electric Power Company has given an estimate on the amount of radiation spilled into the Pacific Ocean, during the first week of April: 4,700 terabecquerels, 20,000 times the safe limits for an entire year!  Contaminated water is still getting into the ocean.

Radioactive iodine levels on 02 April 2011, were 7.5 million times safe limits.  As of 19 April, iodine levels had dropped to 1,700 times the safe limits.