Latest Status of Fukushima Nuclear Plant (UPDATED April 12, 2011)

[TVDOC]

Additional info for Tuesday, March 22:

UPDATE AS OF 2:30 P.M. EDT, MARCH 22:
According to the South Coast Air Quality Management District, which manages three radiation measurement areas for the U.S. Environmental Protection Agency, radiation levels in the United States have not exceeded natural background levels since before the earthquake and tsunami in Japan. These levels are thousands of times below any level that would result in public health impacts, the agency said.

Fukushima Daiichi Update
Power cables have been attached to all reactors at Japan's Fukushima Daiichi nuclear plant, but the power distribution network at reactors 1 and 2 must be repaired before off-site electricity can be restored.

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[Wineslob]

Amazing how the media has now dropped this like a hot radioactive potato.

[thundley4]

Amazing how the media has now dropped this like a hot radioactive potato.

Fox is still covering it some, but Obomba's bombing of Libya is the big story.

[Doc]

Wednesday morning update:

UPDATE AS OF 11:00 A.M. EDT, MARCH 23:
Workers continued efforts on Wednesday to restore offsite power to six reactors at the Fukushima Daiichi nuclear power plant. External power was available Wednesday at reactors 2, 3, 5 and 6, the Japan Atomic Industrial Forum said, but has not yet been re-established to reactor safety systems.

The next step before fully connecting external power is to test and repair the equipment that it will power. Cooling pumps for reactors 1 and 2 were covered by seawater and will require maintenance to bring them online. Tokyo Electric Power Co. is testing the cooling water pumps for reactor 3. External power was connected to the main control room at reactor 3 on Tuesday.

Reactors 5 and 6, which were shut down for maintenance at the time of the earthquake, are in safe shutdown.

“The earthquake and tsunami may have inflicted considerable damage in addition to knocking out electricity supplies,” the International Atomic Energy Agency said. “Since the extent of this damage (and therefore the extent of necessary repair) is unknown, it is not possible to accurately estimate a work schedule.”

Japanese authorities have detected high levels of radioactive cesium 137 in soil about 40 kilometers northwest of the Fukushima plant. Surveys of radioactive substances in soil at six locations found levels of cesium 137 that are 1,600 times typical for that area. Japan’s government is expanding offshore monitoring for radioactive nuclides to 30 kilometers.

Japanese authorities have advised Tokyo residents not to provide municipal drinking water to infants or use it in mixing powdered milk for infants because of abnormal levels of radioactive iodine (I-131) detected in the drinking water. One water sample (5,700 picocuries per liter) indicated approximately twice the Japanese government guideline and prompted the restriction for infants. In an emergency in the United States, state and local officials would closely monitor food and drinking water supplies and quarantine any contaminated supplies as needed to prevent public exposure. U.S. officials use pre-established guidelines for safe consumption of food and water set by the U.S. Food and Drug Administration.

The U.S. Department of Energy has released the first radiation data from its aerial monitoring system and ground detectors in Japan. The department will update the data regularly.

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[NHSparky]

5,700 picocuries per liter

I'm gonna have to figure out how much dose that would give if one drinks 2 liters/day...

Anyone got a decent calculator?  5.7E-09 Ci means you'd have to drink 175,000 liters of water to ingest 1Ci of I-131.

I know there was a thumbrule for Co-60, but not sure if that would be useful.

EPA limit is 4 mr/yr from beta/gamma emitters.

By comparison, a pack a day smoker gets about 4000-5000 mr/year (alpha) from Thorium, etc., found in tobacco.

So if they used the 4 mr/yr limit similar to ours, they're getting their panties in a wad over 8mr/YEAR?

FML.

[Doc]

Thursday update:

UPDATE AS OF 9:30 A.M. EDT, MARCH 24:
Two workers were hospitalized for radiation exposure Thursday, even as Tokyo Electric Power continued to make progress in stabilizing reactors at the Fukushima Daiichi nuclear power plant.

Three workers received radiation exposure of 17 to 18 rem from standing in contaminated water while laying cable in the reactor 3 turbine building, TEPCO said. One of the workers did not require hospitalization. The exposures were less than the 25 rem emergency dose limit established by the Japanese government.

External electric power was restored to reactor 1 and lights were on in the control room. Lighting was restored to the reactor 3 control room Wednesday. Electric power also has been connected to some of the instruments in all reactors except unit 3. While external electricity is available at all six units, it is not in wide use as workers inspect and repair cooling equipment before it can be energized. Reactors 5 and 6 have been safely shut down with cooling systems running on offsite power.

Seawater is being injected to cool the cores of reactors 1, 2 and 3. Workers continue to spray water into the spent fuel pools of reactors 3 and 4.

In Tokyo, the level of radioactive iodine in tap water has dropped to within safety limits Thursday. Yesterday, the Japanese government had advised against giving tap water to infants under one year old.

Smoke seen coming from the reactor building at reactor 3 at 4:20 p.m. on Wednesday (Japan time) “decreased significantly,” the International Atomic Energy Agency said. On Wednesday, smoke from reactor 3 caused the temporary evacuation of workers from reactors 3 and 4.

As reported earlier here, seawater injection continues to cool reactors 1, 2 and 3. Seawater is being sprayed into the reactor 3 spent fuel pool. Crews continued to use a truck to deliver high volumes of water into the spent fuel pool at reactor 4, IAEA said.

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[NHSparky]

17-18 Rem is a lot if it's whole body exposure, but if limited to the extremities, not so much.

And looks like their exposure limits are similar to, if not the same, as ours.

[TVDOC]

Friday's update:

UPDATE AS OF 9:30 A.M. EDT, MARCH 25:
Japanese officials are investigating the source of higher radiation readings at reactor 3 at the Fukushima Daiichi nuclear power plant after two workers were contaminated while laying cable in the turbine building. Tests of the water in which the workers were standing contained a concentration of radioactive material many times the level normally found in water circulating in the reactor, the Nuclear and Industrial Safety Agency said.

“When we looked into the composition of the water, the source...seems to be the reactor core,” said NISA’s Hidehiko Nishiyama. “Another possibility is the spent fuel, and we cannot rule out that possibility either.”

Several possibilities could account for the presence of radioactive materials in the turbine building. Seawater sprayed onto the fuel pool area may have washed over the floor of the fuel pool area onto the turbine building and leaked through the damaged roof into the basement of that building. Other possibilities include a problem with an interconnected system to the primary containment, such as the main steam system, or a small opening in the reactor containment structure.

Japanese authorities recommended residents within 30 kilometers of the plant evacuate voluntarily, extending the recommendation from 20 kilometers. Damage to infrastructure in the area from the earthquake severely limits the ability to provide water, food and other necessary supplies to people sheltering in their homes for the coming weeks.

Tokyo Electric Power Co. is stepping up efforts to switch from sea water to fresh water for cooling the reactors and used fuel storage pools. The United States government has urged the switch to fresh water as soon as possible and is providing two U.S. Navy barges, each of which can carry up to 1,000 tons of water. The ships are scheduled to reach port about 60 kilometers from the Daiichi plant in about three days. Japanese workers at the site will install pipes and hoses to carry the water to the plant.

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[TVDOC]

Sunday, March 27 update:

UPDATE AS OF 9:30 A.M. EDT, MARCH 27:
Tokyo Electric Power Co. workers on Sunday were using pumps to remove highly contaminated water from the basement of the turbine building of reactors 1 and 2 at the Fukushima Daiichi nuclear power plant.

TEPCO also was preparing to remove water from the turbine building of reactor 3. Removal of the contaminated water is necessary to continue power restoration to the plant.

By Sunday, water injection to the pressure vessels at reactors 1, 2 and 3 had been switched from seawater to freshwater.

Off-site power has been restored to all units and work to connect equipment is ongoing. Progress is being slowed by high radiation levels and wet equipment.

TEPCO said that earlier reports of extremely high radiation levels measured in the water in the basement of the reactor 2 turbine building were inaccurate, according to news reports.


UPDATE AS OF 6 P.M. EDT, MARCH 26
At this time, sources such as the International Atomic Energy Agency, Tokyo Electric Power Co. and the Nuclear and Industrial Safety Agency have reported no new developments at the Fukushima Daiichi nuclear power plant. NEI will report on any new developments on this website on Sunday morning.

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[TVDOC]

Monday's update:

UPDATE AS OF 11:30 A.M. EDT, MONDAY, MARCH 28:
Radiation levels in the seawater near the Fukushima Daiichi nuclear power plant remained high on Monday, but dropped considerably from the levels reported on Sunday. Monday’s sampling near the plant’s south discharge outlet showed that radioactive iodine levels were 250 times normal, reduced significantly from 1,850 times normal.

Radiation dose rates also remained elevated in the turbine buildings of reactors 1, 2, 3 and 4. Tokyo Electric Power Co. on Monday said that workers had found similarly high radiation levels in water in drainage conduits outside reactors 1 and 2. The company said that rubble at reactor 3 prevented measures from being taken there on Monday.

TEPCO is pumping contaminated water from the basement of the turbine building at reactors 1 and 2 to the main condenser. The company also continued to pump fresh water into reactors 1, 2 and 3, using electrical-driven pumps rather than diesel-powered fire pumps.

Levels of radiation at the plant’s main gate ranged from 12.5 millirems per hour to about 20 millirem per hour. The U.S. Nuclear Regulatory Commission’s annual limit for occupational exposure is 5,000 millirem.

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[NHSparky]

15-20 mr/hr at the gate?  Ow.

But yeah, as Iodine, et al, decay away, it'll drop very quickly.  Probably under 1-2 mr/hr inside a week or two.

[Doc]

15-20 mr/hr at the gate?  Ow.

But yeah, as Iodine, et al, decay away, it'll drop very quickly. Probably under 1-2 mr/hr inside a week or two.

Yeah.....based on the latest rumors, reactors 1, 2, and 4 are now running on the normal cooling circuits, and should, in a week or so be in cold shut-down mode.

The building at reactor 3 suffered a near complete collapse, so progress is slow to restore normal cooling.  They are going to have a hell of a mess to clean up over the next months or so, but considering that the earthquake and the tsunami exceeded the design limits of the plant to a significant degree, I'm impressed with both the condition of the plant, and the overall reaction and results.

Kudos, to both TEPCO (and its employees), and General Electric.

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[TVDOC]

Tuesday AM report:

UPDATE AS OF 11 A.M. EDT, TUESDAY, MARCH 29:
Japan’s nuclear regulatory agency says Tokyo Electric Power Co. needs to balance injecting cooling water into the reactors at the Fukushima Daiichi nuclear power plant and preventing contaminated water from seeping out, the Japan Atomic Industrial Forum reported Tuesday.

On Monday, TEPCO reported radiation levels of more than 100 rem per hour on the surface of puddles in the reactor 2 turbine building and in a trench outside the building. TEPCO is using sandbags to keep the water confined to the trench, a concrete channel that does not connect to the ocean. The trenches at reactors 1 and 3 are also at risk of overflowing and measures are being taken to contain the water.

The Nuclear and Industrial Safety Agency is awaiting the results of new Science Ministry tests for radioactivity beyond 20-kilometers from Fukushima Daiichi and new samples from TEPCO of the plant grounds.

On Monday, TEPCO discovered minute levels of plutonium in the soil at five locations at the site. The plutonium measured is as little as was in the environment in Japan following nuclear weapons testing during the Cold War and poses no health risk to humans.

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[TVDOC]

Wednesday update:

UPDATE AS OF 12 P.M. EDT, WEDNESDAY, MARCH 30:
Operators of nuclear power stations in Japan have been urged to ensure their facilities have emergency power sources.

Industry Minister Banri Kaieda Wednesday attributed the nuclear emergency in Japan to the loss of cooling systems at the Fukushima Daiichi nuclear power plant, the Japan Atomic Industry Forum reported. He told utility companies they should have mobile generators on hand to cool their nuclear reactors as an added safety measure.

Kaieda said the utilities should confirm the steps they have taken and conduct drills within a month or stop operating their nuclear facilities.

According to the NHK news service, many companies are introducing emergency power generators to their facilities. Some have conducted drills for cooling operations based on a situation in which emergency generators fail.

At the Fukushima Daiichi site, workers continued to inject fresh water into reactors 1, 2 and 3 to keep them cool, while at the same time dealing with water that has pooled in the basements of turbine buildings and in concrete trenches near the units. As available storage space in the reactors’ condensers is filled, Tokyo Electric Power Co. is looking to store the radioactive water in tanks that will be brought to the facility. TEPCO has switched to fresh water for spraying the spent fuel pools for reactors 1, 2, 3 and 4.

All the units at Daiichi are operating on off-site electric power and work continues to connect equipment. High radiation levels and wet equipment still hampers restoration of the plants’ original machinery.

The U.S. nuclear energy industry will learn important lessons from the Fukushima Daiichi accident and “identify additional steps we can and will take to further improve safety at our nuclear plants,” one of the industry’s leaders told a U.S. Senate committee today.

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[vesta111]

Wednesday update:

doc

Mean while back at the ranch house, latest news mentions 3 reactors that are ours and one the Pilgrim I believe built on an earth quake zone.

Some time in the early 1960's we had an earth quake that destroyed the bridge going from Hampton Beach into Seabrook.  Mom took me and some girl friends to check it out, what a mess the bridge was nothing like we have ever seen before.

In the last 3 years we have had quakes strong enough to move homes off their foundations, --weird they start with the booms of a cannon shot, the police have no idea what is going on and from my scanner the police are told to head out there quiet but with a show of lights.  The earth does not shake just these big Booms. It sort of jumps.

We locals know of the garbage dump that was used for 200 years in the area and put it down to methane building up and not vented properly.    However the methane is vented properly----Like MT. Trashmore in Norfork VA. so we now wonder what is going on under the earth in our Granite State foundation.   

The earth is moving, we know this, in some areas it can be natural or due to human caused methane from dumps.    Like a fuse to set off unexpected consequences.

In the early 1980's as we traveled from Va to Me. as we got closer to NY we had to close the windows of the car as the stench hit us, big mountins of garbage being covered in hills so high the big equipment looked like toys atop the garbage heaps.    Where does mega tons of garbage go from the big city's, will the methane explosion set off a earthquake in a fragile area, what if the area is near a nuck plant.??

So much is intertwined with each other.  We plan on foreseeable acts, but there are so many we do not take into consideration.      Problems for our advanced society's to solve if we wish to live.

[NHSparky]

Vesta--you are so full of HORSESHIT your eyes are brown.  The largest quake measured in recorded history around here was about a 4.2.  I FART bigger than that.  They ESTIMATE the Cape Ann quake in 1655 was about a 6.  Seabrook design basis is well beyond that.  Then again, these are the kind of idiots you support in Congress, too:

LINK

Halt licensing at all nuclear plants, bill proposes
March 31st, 2011, 3:00 am · 2 Comments · posted by Teri Sforza, Register staff writer

A bill introduced in Congress this week would impose a moratorium on all new nuclear reactor licenses — and license extensions of the type under way in California – “until new safety requirements are in place that reflect the lessons learned from the Fukushima reactor meltdown.”

The relicensing of reactors at California’s Diablo Canyon nuclear power plant is well under way, and San Onofre is expected to apply for relicensing of its two reactors next year. That would allow the plants to operate for an additional 20 years — for a total useful life of 60 years per reactor.

More than a dozen new nuclear plants are on the drawing board nationwide.

“The Nuclear Power Plant Safety Act of 2011 will help ensure that the U.S. fleet of nuclear reactors is safe,” said Rep. Edward J. Markey, D-Mass., on his web site. “We should not wait for an American meltdown to beef up American nuclear safety measures. We must heed the lessons to be learned from the nuclear meltdown in Japan and ensure nuclear safety here in America.”

Markey’s bill would require much more emergency backup so nuclear plants can weather longer electricity outages, of the type that plagued Japan:

As a first-line of defense, reactors would be required to have  14 days worth of diesel fuel backup generators. Most American reactors currently have seven days worth.
As backup-to-the-backup, plants would be required to have battery generators that can provide power for 72 hours. Most American reactors currently have battery generators that can provide power for only four to eight hours.

=============================================================

Spoken like a guy who hasn't a ****ing clue as to what he's talking about, or one hell bent on destroying any chance of nuclear power ever getting anywhere ever again.

Oh, and ever seen a gas or coal boiler blow?  Pretty impressive, and no less destructive.

[NHSparky]

Oh, and vesta?  Link.  I've talked to 3 lifelong "Brookahs" and none of them know of that bridge ever having collapsed.

ETA: The Underwood Memorial Bridge has been around since 1949.  Never had anything done to it besides routine maintenance.

[Thor]

As of 1994, Mt Trashmore did not have the methane "vented properly"..... Damn Vesta, did you fall out of the stupid tree and hit every branch on the way down??

[JohnnyReb]

Oh, and ever seen a gas or coal boiler blow?  Pretty impressive, and no less destructive.

No, didn't see the explosion but have seen the results.

My daddy worked in a small powerhouse that had coal/gas/diesel fired boilers. He worked in the turbine room so he was away from the explosion. A tube ruptured in the boiler, the boiler split and boy did it make a mess. No one was hurt, thankfully.

[Toastedturningtidelegs]

No, didn't see the explosion but have seen the results.

My daddy worked in a small powerhouse that had coal/gas/diesel fired boilers. He worked in the turbine room so he was away from the explosion. A tube ruptured in the boiler, the boiler split and boy did it make a mess. No one was hurt, thankfully.

The newer ones don't blow like that...more like a frozen popcan exploding but the old style pot belly boilers?....Seen the pics and video in training for work...Glad i wasn't anywhere in the vicinity when she went....Looked like a hydrogen bomb went off!

[TVDOC]

Friday's update:

UPDATE AS OF 12:30 P.M. EDT, FRIDAY, APRIL 1:
Japan’s nuclear safety agency has reprimanded Tokyo Electric Power Co. for not providing radiation monitors to all emergency workers at the Fukushima Daiichi nuclear power plant.

Each worker is supposed to have an individual radiation monitor, but some emergency teams have had to share monitors, the Japan Atomic Industrial Forum reported. TEPCO said that low-priority work will be suspended if employees do not have monitors.

TEPCO said that only 320 of the 5,000 radiation monitors were available after the earthquake and tsunami, JAIF said..

Fukushima Daiichi
A U.S. Navy barge containing freshwater to cool the reactors and used fuel pools at the Daiichi site has been towed to the pier. It will be connected to the pumps with hoses.

Meanwhile, injection of freshwater continues at reactors 1-3 and workers continue to spray freshwater on the used fuel pools for reactors 1-4.

TEPCO is evaluating the use of a synthetic resin that would be sprayed over debris at the site to prevent the spread of radioactive dust.

Additional equipment, including the biggest concrete pump in the world, is being provided by U.S. companies. The pump’s 70-meter boom can be controlled remotely. It has been in use at the Savannah River Site, helping build a U.S. government mixed oxide nuclear fuel plant. Concrete pumps are already in use at the site to assist with spraying water into the used fuel pools.

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[TVDOC]

Saturday's update:

UPDATE AS OF 12 P.M. EDT, SATURDAY, APRIL 2:
Recovery efforts continue at the Fukushima Daiichi nuclear plant in Japan, as aid pours in from the international nuclear community in the form of technical expertise, protective equipment for workers, storage tanks for contaminated water and other measures.

Today, Tokyo Electric Power Co. (TEPCO) said it has identified one likely source of contaminated water reaching the Pacific Ocean, accounting for some of the radiation readings in seawater samples taken over the past several days. The crack is in a two-meter-deep concrete “pit,” or trench, that contains power cables near the reactor 2 water intake. Water measuring between 10 and 20 centimeters deep was found in the pit with radiation levels of more than 1,000 milliSieverts per hour. TEPCO plans to pour concrete to patch the crack while continuing to search for other potential leak paths.
 
The Nuclear Industrial and Safety Agency says iodine-131 will be diluted in seawater and does not pose a threat to the public. Additionally, iodine-131 has a short half-life—about eight days—and will decay to harmless levels fairly quickly. (See NEI's fact sheet to learn more about the health impacts of iodine-131.)

The Japan Atomic Industrial Forum said TEPCO is obtaining a “massive, hollow floating platform” from Shizuoka City and will use it to store contaminated water from the Fukushima site. The float can store up to 18,000 tons of water. Meanwhile TEPCO and the Japanese government are working to identify safe methods for transporting and storing contaminated water.

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[NHSparky]

Looks like TEPCO is also looking to US firms like Bartlett Nuclear, et al, and are willing to pay BIG bucks...they're paying for the flight, room/board, and 300 mile daily round trips.

http://ca.news.yahoo.com/exclusive-wanted-u-workers-crippled-japan-nuke-plant-20110331-165506-832.html

[TVDOC]

Monday's update:

UPDATE AS OF 11:30 A.M. EDT, MONDAY, APRIL 4:
Workers at the Fukushima Daiichi nuclear power plant continued searching Monday for sources of contaminated water leaking from the site into the ocean.

Attempts to seal a crack in a concrete enclosure for cabling in reactor 2 are ongoing after initial efforts failed. Tokyo Electric Power Co. (TEPCO) injected a color tracer into the enclosure in an effort to track the flow of water. That test confirmed the radioactive water is from multiple sources. TEPCO is planning to install underwater silt barriers near the intake for reactor 2 to help contain the contaminated water.

Japan’s Nuclear and Industrial Safety Agency (NISA) and Nuclear Safety Commission both said it will take several months to restore permanent core cooling for the damaged reactors. NISA said it will take that amount of time to remove contaminated water from the turbine buildings and restore damaged plant equipment.

To free up storage space for highly radioactive water in a waste disposal tank, TEPCO is seeking approval to discharge 11,500 tons of low-level radioactive water into the ocean. The utility said the radiation level in the water to be discharged is very low. TEPCO estimated that someone eating fish and seaweed from the adjacent water every day for a year would receive a total exposure of 60 millirem, less than a quarter of the average annual exposure from natural radiation.

Workers continue to inject cooling water into reactors 1, 2 and 3. In addition, spent fuel pools for reactors 1-4 are sprayed with fresh water as needed to keep them cool.

Radiation dose rates at the Daiichi site continue to fall. Recent readings showed 12.4 millirem per hour at the main gate, 7.4 millirem per hour at the west gate and 78 millirem per hour on the side of the administration building facing the reactors.


Majority of Americans Think Nuclear Power Is Safe, Poll Shows

A Gallup survey shows that most Americans believe nuclear power is safe. In a poll conducted March 25-27, 58 percent of Americans said they think nuclear power plants in the United States are safe; 36 percent said they are not.

A Harris poll conducted March 23-25 found that 29 percent of Americans consider nuclear power plants “very safe,” with another 34 percent saying they are “somewhat safe.”

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[TVDOC]

Thursday, Apr. 7 update:

UPDATE AS OF 1:00 P.M. EDT, THURSDAY, APRIL 7:
Tokyo Electric Power Co. continued to inject cooling water into reactors 1, 2 and 3 at the Fukushima Daiichi nuclear power plant, despite a 7.1 magnitude aftershock that hit 70 miles north of the plant.

The temblor, the largest aftershock since the 9.0 magnitude earthquake on March 11, hit at 11:32 pm JST today off the northeast coast. The Japanese government issued a tsunami warning after the earthquake, but lifted it about 90 minutes later.

Three nuclear power plants—Fukushima Daini, Fukushima Daiichi and Onagawa—were shaken, but officials reported no new damage and no injuries to employees. Two of the three electric power lines that supply the Onagawa plant were offline, but normal operations continued with the remaining power line to maintain reactor cooling systems. The plant had been safely shut down since March 11.

Fukushima Daiichi
Seawater radiation levels, while still significantly higher than government safety limits, have decreased near the power plant since TEPCO blocked a leak of highly radioactive water into the ocean. TEPCO said it is too early to credit stopping the leak with the decline.

Workers continued to inject nitrogen gas into the containment vessel of reactor 1, a process that began Wednesday. Inert nitrogen gas is used in reactor containment vessels to stabilize the atmosphere. The nitrogen injection is to prevent possible ignition of the hydrogen that is believed to be accumulating inside the reactor 1 containment. It is expected to take six days to complete the process. Spraying water onto the used fuel storage pools at reactors 1-4 was interrupted briefly because of the earthquake.

TEPCO continued its controlled discharge of low-level radioactive water into the Pacific Ocean to make room in storage tanks for more highly contaminated water on the site. The highly radioactive water in turbine building basements is hampering efforts to restore cooling systems, particularly for reactor 2, where the radiation is highest. Before the highly radioactive water is pumped into the wastewater storage tank, the facility must be inspected for damage, the Japan Atomic Industrial Forum reported. Inspection could take up to a week.

The Japanese government is evaluating possible evacuation of some residents from areas within 12.5 to 18.5 miles of the Fukushima Daiichi site. Residents in the 12.5-mile zone were evacuated early in the emergency. Those within the outer area have been advised to stay indoors. The additional evacuation would be from areas where radiation has accumulated since March 11.

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