Monday, March 18, 2013

Power Blackout Interrupts Cooling at Fukushima Nuclear Plant | Update

UPDATE 19.3.13:
We are keeping a Keen eye on this.  No real news other than status quo.
>Remember the temp rises relatively slowly. But once a certain level is reached (100C)...
Stay Informed.
Make a Plan to Follow.
Follow the Plan.
UPDATE 2:40 am EST: Temperatures rising in Fukushima fuel pools — Now 20 hours without power — Crews scrambling to fix problems — Tepco placing ‘highest priority’ on Unit 4

AP: The spent-fuel pool for reactor 4, which contains spent and new fuel rods, had risen to 30.5 degrees as of 10 a.m. Tuesday from 25 degrees before the power outage. A common pool storing spent fuel for all reactors was at 28.6 degrees, while the reactor 1 pool was at 17.1 degrees and reactor 3 was at 15.9 degrees.

AFP: TEPCO said while engineers did not yet know the cause, there was no immediate danger at the damaged Fukushima nuclear plant.

Kyodo at 6:41p ET: Fukushima Daiichi power failure still underway — Residents anxious, Tepco remains unable to fix problem

Kyodo News, 4:20p ET: Residents of Fukushima Prefecture expressed anxiety about an outage hit the disaster-damaged Fukushima Daiichi nuclear power plant on Monday. Masahide Matsumoto, mayor of Katsurao village where all of its residents have been forced to evacuate after the March 2011 nuclear disaster, said that the incident came at a sensitive time as evacuation zones are scheduled to be reclassified Friday and some residents are allowed to make day trips to their homes. [...]
Kyodo at 2:29p ET: “Tepco hasn’t been able to work out steps to ensure bringing system back online” at Fukushima Daiichi — No ‘major’ changes in radioactivity levels
12 HOURS IN: Kyodo at 6:41p ET: Fukushima Daiichi power failure still underway — Residents anxious — Tepco remains unable to fix problem...

[TEPCO] still remained unable as of Tuesday morning to resume the spent fuel cooling system at its Fukushima Daiichi nuclear power plant after the system’s suspension on Monday due to a power failure. TEPCO is continuing its probe into the cause of the outage affecting the cooling system for the spent fuel pools of the No. 1, 3 and 4 reactors. According to the Nuclear Regulation Authority, the outage may have stemmed from the power distribution board or cables attached to it.
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Power Blackout Interrupts Cooling at Fukushima Nuclear Plant | Environment News Service

TOKYO, Japan, March 18, 2013 (ENS) – A power blackout occurred today at Japan’s damaged Fukushima Daiichi nuclear power plant, knocking out the system that cools four pools of water holding spent fuel rods.
Operator Tokyo Electric Power Company, TEPCO, said the blackout took place just before 7 pm Monday.
The affected system is used to cool three pools containing about 2,100 spent fuel rods from the plant’s number 1, 3, and 4 reactors, which suffered core meltdowns in the week following the March 2011 earthquake and tsunami that knocked out power to Fukushima Daiichi.

Fukushima Daiichi
Fukushima Daiichi nuclear power plant. View from the top of Unit 4 looks toward Units 3, 2 and 1. The twisted metal in the middle distance is the top of Unit 3, where high radiation is slowing work. The cranes are operated remotely from the Emergency Response Center. December 18, 2012 (Photo by Gill Tudor / IAEA)

TEPCO said the blackout also has interrupted the cooling system for another pool containing about 6,300 rods, and it has also affected part of a system that disposes of contaminated water.
TEPCO officials said a total of about 8,500 spent fuel rods are stored in the four pools.
Company officials say the power outage has not halted the injection of coolant into the damaged reactors.  They reported that at four pm temperatures in the pools were measured at 25 degrees Celsius. Temperatures are said to be rising at 0.1 to 0.3 degrees Celsius per hour.
The officials said it will take about four days for temperatures in the pools to exceed 65 degrees – the legal limit. “There is no problem with the spent fuel pool water temperature control considering that there is a sufficient margin to the maximum allowed temperature (65°C),” TEPCO said in a statement.
No abnormality has been detected in radiation levels in areas surrounding the plant in Fukushima Prefecture, they said.
However, today a new all-time high radiation level was reported in a fish near the Fukushima Daiichi nuclear plant. The fish was caught at the port adjacent to the nuclear site, TEPCO said March 15.
A fat greenling, Hexagrammos otakii, a luxury delicacy in Japanese cuisine, was found to contain radioactive cesium at 7,400 times the government’s food safety standard.
Government officials said the reading of 740,000 becquerels per kilogram is the highest ever recorded in sampling surveys of marine life done since the March 2011 disaster.
On Friday, the Abe Government began work to revamp Japan’s energy policy. A subcommittee of the Ministry of Economy, Trade and Industry’s Advisory Committee for Natural Resources and Energy held the first of a planned series of meetings which aim by the end of 2013 to draft a new plan to meet Japan’s future energy needs.

Spent fuel pool
Surface of the spent fuel pool at Unit 4, Fukushima Daiichi. Steel pillars and a concrete wall have been added as reinforcement beneath the pool, but moving the fuel out of the damaged building is a priority. December 18, 2012 (Photo by Gil Tudor / IAEA)

But in a discussion of the country’s renewable energy facilities, the panel ignored a pledge by the previous government to phase out nuclear power, which had been supplying about 30 percent of the country’s electricity until most nuclear plants were shuttered in the aftermath of the Fukushima Daiichi nuclear meltdown.
In 2012, the then-governing Democratic Party of Japan promised to close all nuclear plants by the end of the 2030s.
But the current administration, led by Prime Minister Shinzo Abe’s Liberal Democratic Government, believes that move would undermine Japan’s competitiveness.
In a February 28 speech to Parliament, Prime Minister Abe pledged to restart nuclear plants that can pass stricter guidelines.
The new guidelines are expected to be approved as early as July by the new watchdog agency, the Nuclear Regulation Authority.
Currently, most of Japan’s nuclear plants are closed, or their operation has been suspended for safety inspections. The last of Japan’s 54 reactors went offline for maintenance on May 5, 2012, leaving Japan entirely without nuclear power for the first time since 1970.
Despite protests from both the city and prefecture of Osaka, Unit 3 of the Ōi Nuclear Power Plant was restarted on July 1, 2012, and by September 2012, a second reactor at the Ōi plant also was restarted. These two are now Japan’s only operating nuclear power reactors.

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