La tarcoteca

By Pablo Heraklio & cols. Tarcoteca @

miércoles, 22 de junio de 2011

Nuclear Alerts at two nuclear plants in Nebraska or Fukushima replics

-On June 6th, 2011 a nuclear emergency level 1 in the state of Nebraska was declaring becouse of flooding on the Missouri River. Power Plant Fort Calhoun is affected by the flood. the Federal Aviation Administration FAA imposes a no-fling zone 2 mile radius around the plant.
-On 7th alert passes to level 2 "major failure of safety" in the nuclear power plant, 20 miles from Omaha. A short circuit at 9:30 am triggered a chemical fire that caused the power loss of 2 cooling system pumps in the spent fuel pool. The fire was extinguished by the fire brigade at 10:20 am. Both pumps were out of line for 90 minutes.
-According to the NRC Nuclear Regulatory Commision, the power supply could be resumed and <<the temperature was always maintained at safety levels>>, passing the alert to level 1 becouse of the flood. They also indicate that the reason the fire started is under investigation.
-On June 10th the Cooper Power Plant indicates a <<potential impact related to the growth of the Missouri River>>.
-On June 16th waters suround the central of Fort Calhoun. Measures was displayed: rubber barriers, retaining walls and sandbags. They started displaying in the central Cooper.
-On June 19th, 2011 declaring a new alert level 4 "accident safely out of the facility," the lowest of four emergency levels that indicate nuclear accident. 
-The same day the Cooper Nuclear Power Plant, reported to authorities a new "unusual event" because of the rising river.
-On June 20th, 2011 the alert increased the level and was declared a "rupture of the normal operating regime" at the Cooper nuclear plant also flood. The plant was forced to shut down the reactors.

Ensure that Fort Calhoun plant remains off and that despite everything, the reactor was intact and secure. They note that the facility went spent out on April 9th, when they proceeded to spare and now it can't start again.
Today, June 21th, neither the IAEA nor US.NRC have made statements about the state of emergency. Would the authorities be downplaying as Japan did? Obviously yes.

Jeff Hanson, spokesman for the Omaha Public Power District OPPD said: <<The Center was designed taking into account that it should withstand a flood event as the greatest place in the last 500 years>>.
Translate: they did not expect these floods, which are proportionally larger than all the floods over the past 500 years combined.
Their website does not indicate anything about the incident in absolutly.

The water level will continue rising in the coming days due to melting of the huge snowfall this year covered all the mountains in the area.

Engineering Review:
Designs Mark I and II were rejected by General Electrics becouse have pools on the ground level and be easy target for attacks. Now designed underground, thereby increasing the risk of flooding. The plant is prepared to support one week flooded, however predicted that the flood will remain at least a month.

The safety of deep pools used to store the radioactive spent nuclear fuel in power plants has been a problem since the accident at the nuclear plant in Fukushima Japan, in March. If the cooling water of a pool is lost, the spent nuclear fuel could warm and emit radiation starting to heat up, melt the core and accelerating meltdown.

-Americans use the scale of the NCR and the INES international, so when european media, mass misinformation and dumbing, heard about a level 4 alarm level, they believe that a meltdow is coming, as in Homer Simpson's Springfield cartoon.
-Although the situation is not meltdown, for now, the importance of the fact is the coincidence in time of the fire and the the catastrofic natural accident such as floods. What more needs to be a new large-scale accident? If the wasted material in the cooling pool doesn't refrigered, as seems to be that coud happened, the fireworks would begin and the escape of radioactive material unebitable.
-Contingencies that may affect the facilities are unpredictable, therefore, applying the law of numbers, the more there are built more accidents will occur. As we have seen, a nuclear accident is different to the other types of accident.
-Current nuclear power plants are very old and therefore vulnerable. But his greatest enemy is human error: a bad valve closed, a seal open...
-If continue to flood and cut the supply of electricity to the cooling systems are available 88 hours to explode, which gives us about 60 hours leeway.
-This year I will not go to Nebraska in vacation.

Nuclear si, por supuesto!
Nuclear sí, cómo no!

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