Probably the best news from Fukushima to date.

Camera inspection of Unit #4 spent fuel pool revealed no significant fuel damage

Some debris was scattered in the pond as a result of the damage to the building but it is thought that fuel integrity has been maintained.

Also good news, but feeling weird, is that seawater levels are ND (“non-detectable”) 3km out.  Since the standard is in cm^3, I’d think they could easily pull enough water to get some readings.   But as we said from the start, the Pacific Ocean is a pretty big dispersion unit. 

Closer in, there’s still activity around the discharge areas.  But even that is now beneath the “density limit”

About wormme

I've accepted that all of you are socially superior to me. But no pretending that any of you are rational.
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15 Responses to Probably the best news from Fukushima to date.

  1. crosspatch says:

    Yes, once they started pumping out the water from the #2 basement, that should have greatly reduced the amount getting into the sea water if that was (as I believe it is) the source of it.

    There would still be a lot of contaminated water below the surface of the soil but pumping out that basement would have reversed the direction of the flow. It would now be trying to flow back into the basement through whatever cracks it flowed out of.

  2. crosspatch says:

    Oh, and radioactive cesium is still above the limit, though it is getting close to it.

  3. Rana says:

    I saw mention of the iodine down some 90% from April 13th and the Cesium also down around 50 to 60%. I get the Iodine because of the relatively short half-life, but with a half-life of 30 years how does the Cesium-137 go down in just weeks?

  4. bartel says:

    On the other hand, from World Nuclear News, 27 April:

    Unit 1 remains the most difficult of the three. Core damage estimated at 70% may be inhibiting the flow of coolant water, leading to higher temperatures and pressures.

    That may be the highest specific damage estimate I’ve seen, although it’s not clear a) whose estimate it is, nor b) how it should be construed.

    • crosspatch says:

      From that same article:

      A survey of radiation dose rates at the site has revealed the highest to come from debris left on the ground after the explosions at units 1 to 4. Some rubble beside unit 3 is giving the highest dose rate of some 300 millisieverts per hour, while other debris patches are at 30-40 millisieverts per hour.

      More generally, the dose rates at the edges of the site are less than 0.6 millisieverts per hour and increase towards the centre where they range up to about 10 millisieverts per hour. However, there are numerous and varying small areas with higher dose rates anywhere between 15 and 60 millisieverts per hour.

      Water transfer pipes near unit 2 and the waste treatment facility feature high surface dose rates of 75-160 millisieverts per hour at various points. Levels in the air nearby are lower at 4.9-20 millisieverts per hour.

      • bartel says:

        This description also seems consistent with that very detailed map posted the other day, which I remember showed several “rubbles” readings in that range.

  5. Mountainbear says:

    I heard in Tokyo some 450 people were protesting against nukes.

    Now compare that with the 200k in Germany.

    Oh dear, oh dear…

  6. crosspatch says:

    The Germans will simply have France build the nuclear plants and then build the power lines to reach them. Germany will still have plenty of nuclear power, they just won’t have the reactors in Germany.

    • wormme says:

      Good thing winds and waters respect national borders, huh?

    • Mountainbear says:

      That’s funny, because Germany has been buying a lot of French nuclear power lately. Their average domestic productions simply isn’t enough.

      Same I hear from Scotland where, last winter, they had to import a lot of that, too, because their super-huge windparts produced essentially 0.0% of power when it was needed.

      The Germans had an overproduction from their windparks a few weeks ago (due to great weather in the North), but nobody wanted to buy that. So the government had to subsidize the power with roughly 2 million Euro before anyone would buy it.

  7. HopeT says:

    Whenever possible, I prefer not to have my name posted. Here’s a pic that reminds me of the pic that you featured earlier of two workers driving a truck with their breathing apparatus on over their suits. This one seems to add kitchen gloves to the mix.

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