FUKUSHIMA DAIICHI - On-going Nightmare!
Japan Struggles With Tainted Reactor Water
[ http://online.wsj.com/article/SB1000142 ... 09254.html ]
----- Original Message -----
From: Gordon Edwards
Sent: Wednesday, February 29, 2012 3:45 PM
Subject: Wall Street Journal: Japan Struggles With Tainted Reactor Water
Background:
When the huge earthquake struck Japan on March 11 2011 the three operating nuclear reactors at the Fukushima Dai-ichi plant immediately and safely shut down. The nuclear reaction in all three reactors was completely stopped long before the tsunami hit. The shutdown systems worked perfectly.
But no one knows how to shut off radioactivity. In the core of each reactor, such an enormous inventory of radioactive materials has been created by the splitting of uranium and plutonium atoms that large quantities of heat will continue to be produced for many years after the nuclear chain reaction has stopped. This heat is caused by the unstoppable radioactive disintegrations of dozens of varieties of radioactive materials called "fission products".
Fission products -- such as cesium-137, iodine-131, strontium-90 --are the broken pieces of uranium and plutonium atoms that were split in order to get energy to boil water to produce electricity. The fission products are fiercely radioactive. The heat they produce is called "decay heat", because it is the result of radioactive decay.
And no one knows how to speed it up, slow it down, start it, or stop it. Like the tsunami itself, the decay heat is an unstoppable force of nature.
And as long as that decay heat is being produced, it will drive the temperature up and up, unless the heat can be removed as rapidly as it is being produced. For that you need pumps, and for those you need power.
So when the tsunami wiped out the backup electrical generators, and the batteries on hand became exhausted, the stage was set for the three reactors to undergo complete core meltdowns, at temperatures in excess of 2800 degrees C (5000 degrees F).
Even now, and for some years to come, heat must be removed from the radioactive mass in the core of each reactor by flushing water through it at a tremendous rate. But that act pollutes the water with debris from the damaged core and with radioactive materials. Cooling the core automatically flushes out those radioactive materials on an ongoing basis -- and then you have enormous volumes of radioactively contaminated water that has to go somewhere. And, of course, despite industry efforts to deny the danger, these materials are all superb carcinogens and mutagens....
Question of the day: What do you do with millions of gallons of highly radioactive water? And how do you persuade people that "everything is under control" . . . when it isn't?
Gordon Edwards
President, Canadian Coalition for Nuclear Responsibility
http://www.ccnr.org
============
Japan Struggles With Tainted Reactor Water
<[ http://online.wsj.com/article/SB1000142 ... 09254.html ]>
The Key to Cooling Damaged Nuclear Plants Now Poses Major Radioactive Worry, Storage Challenge
By PHRED DVORAK , Wall Street Journal, February 29 2012
http://tinyurl.com/6lp5h9f
Foreign correspondents were taken on a tour of the blasted Fukushima Daiichi nuclear reactors. The WSJ's Phred Dvorak talks to Jake Schlesinger what she saw at Fukushima.
OKUMA, Japan—Nearly a year after the March 11 earthquake and tsunami sparked triple meltdowns at reactors here, the taming of Fukushima Daiichi has become in large part a quest to control water.
Foreign journalists on a tour of the Fukushima Daiichi compound Tuesday saw fields of squat, gray water-storage tanks; miles of orange, black and gray hoses; an AstroTurf-covered barge full of contaminated water; and white-suited workers huddled in a field preparing space for a new water container.
Water is crucial to the continued safety and stability of the Fukushima Daiichi plant, even after reactor temperatures fell at the end of last year to a level at which little radioactivity is being emitted. Plant operator Tokyo Electric Power Co. is still injecting hundreds of thousands of gallons into the reactors every day to keep them from overheating again.
Because that water and groundwater—now contaminated—is leaking out of the reactors at an estimated 10,000 tons a month, cleaning it up and storing the excess is a constant challenge.
When the temperature drops, as it is expected to do Tuesday night, there is the added problem that the water might freeze, bursting out of hoses, tanks and pipes.
More:
Japan Panel Shows Nuclear Vulnerability (need Subscription)
< [ http://online.wsj.com/article/SB1000142 ... 73938.html ]>
Japan Real Time: Photos: One Year On
< [ http://blogs.wsj.com/japanrealtime/2012 ... e-year-on/ ]
MORE:
[ http://online.wsj.com/article/SB1000142 ... 09254.html ]
[ http://online.wsj.com/article/SB1000142 ... 09254.html ]
----- Original Message -----
From: Gordon Edwards
Sent: Wednesday, February 29, 2012 3:45 PM
Subject: Wall Street Journal: Japan Struggles With Tainted Reactor Water
Background:
When the huge earthquake struck Japan on March 11 2011 the three operating nuclear reactors at the Fukushima Dai-ichi plant immediately and safely shut down. The nuclear reaction in all three reactors was completely stopped long before the tsunami hit. The shutdown systems worked perfectly.
But no one knows how to shut off radioactivity. In the core of each reactor, such an enormous inventory of radioactive materials has been created by the splitting of uranium and plutonium atoms that large quantities of heat will continue to be produced for many years after the nuclear chain reaction has stopped. This heat is caused by the unstoppable radioactive disintegrations of dozens of varieties of radioactive materials called "fission products".
Fission products -- such as cesium-137, iodine-131, strontium-90 --are the broken pieces of uranium and plutonium atoms that were split in order to get energy to boil water to produce electricity. The fission products are fiercely radioactive. The heat they produce is called "decay heat", because it is the result of radioactive decay.
And no one knows how to speed it up, slow it down, start it, or stop it. Like the tsunami itself, the decay heat is an unstoppable force of nature.
And as long as that decay heat is being produced, it will drive the temperature up and up, unless the heat can be removed as rapidly as it is being produced. For that you need pumps, and for those you need power.
So when the tsunami wiped out the backup electrical generators, and the batteries on hand became exhausted, the stage was set for the three reactors to undergo complete core meltdowns, at temperatures in excess of 2800 degrees C (5000 degrees F).
Even now, and for some years to come, heat must be removed from the radioactive mass in the core of each reactor by flushing water through it at a tremendous rate. But that act pollutes the water with debris from the damaged core and with radioactive materials. Cooling the core automatically flushes out those radioactive materials on an ongoing basis -- and then you have enormous volumes of radioactively contaminated water that has to go somewhere. And, of course, despite industry efforts to deny the danger, these materials are all superb carcinogens and mutagens....
Question of the day: What do you do with millions of gallons of highly radioactive water? And how do you persuade people that "everything is under control" . . . when it isn't?
Gordon Edwards
President, Canadian Coalition for Nuclear Responsibility
http://www.ccnr.org
============
Japan Struggles With Tainted Reactor Water
<[ http://online.wsj.com/article/SB1000142 ... 09254.html ]>
The Key to Cooling Damaged Nuclear Plants Now Poses Major Radioactive Worry, Storage Challenge
By PHRED DVORAK , Wall Street Journal, February 29 2012
http://tinyurl.com/6lp5h9f
Foreign correspondents were taken on a tour of the blasted Fukushima Daiichi nuclear reactors. The WSJ's Phred Dvorak talks to Jake Schlesinger what she saw at Fukushima.
OKUMA, Japan—Nearly a year after the March 11 earthquake and tsunami sparked triple meltdowns at reactors here, the taming of Fukushima Daiichi has become in large part a quest to control water.
Foreign journalists on a tour of the Fukushima Daiichi compound Tuesday saw fields of squat, gray water-storage tanks; miles of orange, black and gray hoses; an AstroTurf-covered barge full of contaminated water; and white-suited workers huddled in a field preparing space for a new water container.
Water is crucial to the continued safety and stability of the Fukushima Daiichi plant, even after reactor temperatures fell at the end of last year to a level at which little radioactivity is being emitted. Plant operator Tokyo Electric Power Co. is still injecting hundreds of thousands of gallons into the reactors every day to keep them from overheating again.
Because that water and groundwater—now contaminated—is leaking out of the reactors at an estimated 10,000 tons a month, cleaning it up and storing the excess is a constant challenge.
When the temperature drops, as it is expected to do Tuesday night, there is the added problem that the water might freeze, bursting out of hoses, tanks and pipes.
More:
Japan Panel Shows Nuclear Vulnerability (need Subscription)
< [ http://online.wsj.com/article/SB1000142 ... 73938.html ]>
Japan Real Time: Photos: One Year On
< [ http://blogs.wsj.com/japanrealtime/2012 ... e-year-on/ ]
MORE:
[ http://online.wsj.com/article/SB1000142 ... 09254.html ]