Japan Earthquake | Page 1205

  • Crews fixing gauges inside Fukushima Daiichi unit 1 discovered water levels in the reactor were much lower than originally thought – likely 5 meters below the top of the 4-meter-long fuel rods.

    Kyodo News quoted TEPCO as saying it has found multiple small holes in the pressure vessel's welded piping. The possibility of core-exposed coolant seeping into underground tunnels that might leak complicates TEPCO’s plan to circulate water inside the containment vessel to bring the fuel to cold-shutdown temperatures in six to nine months. <...>

    The volume of water pumped into the unit so far indicates significant leakage has already occurred: The containment can only hold 7,800 cubic meters of water. More than 10,000 cubic meters of water has been pumped into the 360-cubic-meter pressure vessel within it.

    nuclearstreet.com

    www.tepco.co.jp

    by Rob in SF via Tepco.co.jp 5/16/2011 8:01:39 AM

  • Areva Halts Construction of Virginia Reactor Component Plant
    Citing unfavorable market conditions, Areva announced on Monday that it will indefinitely suspend construction of the Areva Newport News manufacturing facility.

    The plant was to supply heavy parts like reactor vessels and steam generators for Areva’s U.S. EPR reactor. According to the Richmond Times-Dispatch, Areva recently told Newport News’ development director that its goal is to restart construction in 18 months, but statements from Areva indicated the company does not know for sure when work on the project will resume. Last year, Areva and partner Huntington Ingalls Industries–Newport News Shipbuilding pushed the plant’s completion date from 2012 to 2013.

    nuclearstreet.com
    by Rob in SF 5/16/2011 8:10:34 AM

  • Somehow I don't think they're talking about us... ;)

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    by Rob in SF 5/16/2011 8:13:33 AM

  • "Kan: Fukushima plant may be contained as scheduled
    Prime Minister Naoto Kan says the accident-stricken Fukushima Daiichi nuclear power plant may be brought under control in 6 to 9 months as laid out in a timetable released by its operator last month." www3.nhk.or.jp
    by hudebnik 5/16/2011 8:14:57 AM

  • @hudebnik But per the blurb below with photo: "The possibility of core-exposed coolant seeping into underground tunnels that might leak complicates TEPCO’s plan to circulate water inside the containment vessel to bring the fuel to cold-shutdown temperatures in six to nine months. "
    nuclearstreet.com
    by Rob in SF 5/16/2011 8:16:44 AM

  • @Hud With new bad news everyday, how can they do that? The workers time at the plant is simply too short to do effective work.
    by Ralph Unger 5/16/2011 8:17:49 AM

  • @Ralph - spot on, management by assertion again.
    by hudebnik 5/16/2011 8:18:31 AM

  • They would have to Apollo 13 it and recreate the plant on another site so workers could be familiar with the site while not getting radiation. Knowing my job is important, but knowing the job site takes a while.
    by Ralph Unger 5/16/2011 8:20:15 AM

  • There's an interesting editorial at the Mainichini Daily News mdn.mainichi.jp "Nuclear power plant disaster highlights importance of diverse safety measures"
    by hudebnik 5/16/2011 8:20:27 AM

  • "Crews fixing gauges inside Fukushima Daiichi unit 1 discovered water levels in the reactor were much lower than originally thought – likely 5 meters below the top of the 4-meter-long fuel rods."

    Since when, the tsunami?!!!

    nuclearstreet.com
    by Rob in SF 5/16/2011 8:20:57 AM

  • Back in the arena
    by bo 5/16/2011 8:21:07 AM

  • Hi @bo
    by hudebnik 5/16/2011 8:21:19 AM

  • @Ralph Unger We built 2 Bin Laden training compounds...
    by Rob in SF 5/16/2011 8:22:37 AM

  • @bo - I was thinking - as the Fuku news is getting markedly worse (or reflecting the actual situation at last) it would be great if Kyodo would make their Nuclear crisis news feed open access again. I tried to email them but they won't accept gmail addresses. Do you have a contact who could ask them?
    by hudebnik 5/16/2011 8:23:27 AM

  • @all - it seems to me (from a long way away) that as the story is hotting up (sorry) the Japanese press is getting much less deferential and is digging a lot harder.
    by hudebnik 5/16/2011 8:25:34 AM

  • @hudebnik I could email from my work address, which is a Japanese academic address. I'll try that.
    by bo 5/16/2011 8:26:53 AM

  • The best I can figure is that enough other things melted with the fuel to work as a moderator in the slag at the bottom of the reactors. I was worried about thermal shock and things like that, now I find it was worse then I could ever imagine, what is amazing to me is that even the worst, has not been nearly as bad I thought it could be. Groundwater and long term contamination seems to be the greatest concern, not a Chernobyl like accident.
    by Ralph Unger 5/16/2011 8:26:55 AM

  • @hudebnik Agreed. It seems to have taken a while to gain traction, but the anger among the Japanese press has been apparent for a while.
    by Rob in SF 5/16/2011 8:27:37 AM

  • @bo - thanks
    by hudebnik 5/16/2011 8:27:47 AM

  • There is so much I do not understand (not surprising) but the experts are also confused.
    by Ralph Unger 5/16/2011 8:28:10 AM

  • Regarding the press here, I mentioned below that I asked a colleague what the tone of the press and discourse was after the revelations of the meltdown of #1. He told me that there is a sense that TEPCO is hiding things, but people are not yet upset as they feel that there hasn't been much contamination, and they are waiting to see who things go...
    by bo 5/16/2011 8:28:21 AM

  • Also, he mentioned that the Asahi story based on the 100 page TEPCO document was all drawn from material posted to Wikileaks. He said that if we can't find the docs he will see if he can trace them.
    by bo 5/16/2011 8:29:14 AM

  • @bo - well I think they will soon find out, the genie is out of the containment sorry bottle now
    by hudebnik 5/16/2011 8:29:20 AM

  • @hudebnik I agree. When the cesium data hits the press...
    by bo 5/16/2011 8:29:45 AM

  • The I-131 data is of more concern to me. That stuff should be gone.
    by Ralph Unger 5/16/2011 8:30:43 AM

  • Good grief...

    Govt preparing N-crisis road map
    "The third-party panel will investigate the cause of the nuclear accident and discuss measures to prevent similar accidents. It will also review the government's and TEPCO's handling of the nuclear crisis.

    The government plans to stipulate in its road map that full-fledged restoration activities for areas contaminated by radiation from the Fukushima No. 1 nuclear plant will begin by autumn, so that the rebuilding activities in the areas will not lag behind those in other areas hit by the March 11 earthquake and tsunami, the sources said.

    In its initial road map, TEPCO said it would seek to significantly reduce the amount of radioactive substances from the crippled nuclear complex within six to nine months. However, various newly-emerged factors forced the utility firm to review the plan."
    www.yomiuri.co.jp
    by Rob in SF 5/16/2011 8:31:40 AM

  • Cold shutdown is the goal, but if the fuel is still producing heat? What could the timetable be then?
    by Ralph Unger 5/16/2011 8:32:08 AM

  • @all - one thing that has struck me lately is how much worse the fukushima accident is than any safety case ever envisaged. If a loss of coolant accident was something like once in 100,000 years and a loss of containment effectively/supposedly impossible, and we have 3 total containment failures.
    by hudebnik 5/16/2011 8:32:28 AM

  • And there have now been 5 total reactor loss accidents in 32 years! So much for the safety of nuclear power.
    by hudebnik 5/16/2011 8:35:55 AM

  • Preliminary analysis shows that No. 1 had already entered a critical state by 6:50 a.m. on March 12, with most of its fuel having melted and fallen to the bottom of the pressure vessel, the plant operator said. Tepco released data Thursday showing some of the fuel rods had melted.

    The reactor automatically halted operations immediately after the 2:46 p.m. quake, but the water level in the reactor dropped and the temperature began rising at around 6 p.m. The damage to the fuel rods had begun by 7:30 p.m., with most of them having melted by 6:50 a.m. the following day, the utility said.

    search.japantimes.co.jp
    by Rob in SF 5/16/2011 8:38:01 AM

  • Do earthquakes cause cracks? The area sunk about 1 ft after the quake, Who could have seen that coming?
    by Ralph Unger 5/16/2011 8:39:12 AM

  • In a related revelation concerning a major mixup after the six-reactor complex lost power, Tepco and other sources said the same day that the utility had assembled 69 power supply vehicles at the plant by March 12 but that these proved virtually useless.

    The inability to use the vehicles delayed the damage control work at the plant, significantly worsening the emergency.

    Tepco earlier said it had tried to connect the vehicles to power-receiving equipment needed to operate the water pumps intended to cool down the reactors. But this failed because the equipment was submerged in seawater from the tsunami, which posed the risk that the equipment would short out.

    Tepco's account conflicts with the one detailed by the Nuclear and Industrial Safety Agency, which mentioned the first arrival of such a vehicle on the evening of March 11 but stopped mentioning it the following day, as the focus of attention had shifted to the need to release radioactive steam to relieve pressure that had built up inside the containment vessel of reactor 1.

    search.japantimes.co.jp
    by Rob in SF 5/16/2011 8:40:13 AM

  • Did they not delay the release of steam because a politician was visiting the site?
    by Ralph Unger 5/16/2011 8:41:27 AM

  • @Ralph Unger Yes. That was another screw-up.
    by Rob in SF 5/16/2011 8:41:52 AM

  • @ralph YES!
    by elainekirk 5/16/2011 8:41:53 AM

  • @Ralph - major earthquakes are well-known to cause significant permanent ground movement, often 1 or 2 metres. It was well known that the fault to the east of Fukushima could cause a 'megathrust' quake it it went, and there was a very similar quake and tsunami in Indonesia on Boxing Day 7 years earlier, so the whole thing may not have need predictable but was anticipateable, especially as such a vulnerable facility.
    by hudebnik 5/16/2011 8:43:32 AM

  • Sorry can't type on this little netbook but you get my drift.
    by hudebnik 5/16/2011 8:44:26 AM

  • Yep, and a geological record that showed 50ft tsunamis.
    by Ralph Unger 5/16/2011 8:44:32 AM

  • I asked a friend of mine who was an engineer at the UK nuclear power generator about Fuku and he summed it up very nicely - "old reactors, didn't want to spend the money"
    by hudebnik 5/16/2011 8:45:38 AM

  • Sea sheel on a hillside 15 meters above sea level might be the first clue, the second clue would be a stone tablet marking the last large tsunami. www.cbsnews.com
    by Ralph Unger 5/16/2011 8:46:34 AM

  • @hudebnik They're spending money now. And to what avail?
    by Rob in SF 5/16/2011 8:46:57 AM

  • "Shell" oops.
    by Ralph Unger 5/16/2011 8:47:02 AM

  • @Rob - yes, crafting (maybe knitting) a totally new and untried stable door!
    by hudebnik 5/16/2011 8:48:08 AM

  • Shared ventilator stack that may have cause #4 explosion (from 3# gas) is pure negligence.
    by Ralph Unger 5/16/2011 8:50:43 AM

  • I pretty convinced they're not testing the right spots yet. There's gotta' be hot water reaching the sea. The Greenpeace testing may find it...

    Initial tests of 22 seaweed samples collected at distances up to 65 kilometres (40 miles) out to sea from the plant "registered significantly high levels of radioactive contamination," the group said.
    Ten seaweed samples showed levels of over 10,000 Bequerel per kilogramme, the group said.
    It did not specify if the contamination was from iodine-131 or caesium-137, the official safety limits for which are 2,000 Bequerel per kilogramme and 500 Bequerel per kilogramme respectively.
    "From May 20, fishermen along the coast will begin harvesting seaweed for public consumption," said Ike Teuling, a radiation expert with the international environmental and anti-nuclear activist group.
    "Our research indicates a significant risk that this seaweed will be highly contaminated," he said according to a statement.


    www.google.com
    by Rob in SF 5/16/2011 8:51:16 AM

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