Skip to main content

Nuclear workers who inspected the area in the Fukushima 4 reactor building under the spent fuel for the first time since the M9.0 earthquake and tsunami were met by a scene of destruction. TEPCO's plans to cool the spent fuel pool using existing plumbing will have to be scrapped. The plumbing that would have been used to cool the spent fuel pool is broken, bent and twisted beyond repair. The water in the spent fuel pool is close to boiling. TEPCO has been unable to cool the spent fuel pool below a temperature NHK reports as "above 80 degrees Celsius."

Because reactor 4 was being refueled when the earthquake struck in March, the spent fuel pool contains an exceptional amount of nuclear material. All the fuel from the reactor, plus a large inventory of old spent fuel is contained in the spent fuel pool that looms above the reactor vessel at the 4th story of the building that contains the reactor. TEPCO is working hard to prevent a loss of coolant accident that could lead to a spent fuel fire or hydrogen explosion which could spread radioactivity to the environment.

TEPCO took this image of the 4th floor of the reactor building of Unit 4 on June, 10 which shows massive damage to the plumbing of the spent fuel pool.

On Friday, workers entered the 4th floor of the No.4 reactor building where the pool is located for the first time since the nuclear disaster took place.

They found a large hole in a wall created by the March 15th explosion. They also discovered that a nearby pipe necessary for the cooling system had been mangled.

TEPCO says the repair team found it hard to work near the pool as equipment had been destroyed and debris was scattered on the floor.

TEPCO workers installed steel supports under unit 4's spent fuel pool to prevent its collapse.

Because the spent fuel pool was designed for ease of refueling the reactor, not spent fuel storage, it is located high in the reactor building. Expert nuclear engineers have been flummoxed about how to deal with the situation at unit 4. Because the spent fuel is highly radioactive and densely packed workers cannot service the pool without risking high radiation exposure. It is hard to get heavy equipment high into the reactor building to get the spent fuel out the pool.  And it is hard to keep the pool cool.

Moreover, the continued high levels of I-131, with a half life of just 8 days, near unit 4 could indicate criticality events might have taken place in the spent fuel pool since the earthquake. Because we don't know how the radioactive water got to where it is this is just a possibility. However, the ratios of Iodine-131 to Cesium-137 should be dropping rapidly because Cesium-137 has a much longer half life of 30 years. The continued high levels of Iodine-131 at several sites near units 2, 3 and 4 indicates that something is happening but we don't know what it is.

Fukushima unit 4's spent fuel looms like a radioactive sword of Damocles over Japan.

Boiling water reactors in the United States have similar spent fuel pools to Fukushima's. This incident shows that these pools are unsafe for spent fuel storage. These pools were clearly never designed for spent fuel storage. The USNRC should direct the nuclear industry in the United States to remove, as quickly as possible consistent with worker safety standards, all spent fuel from storage in pools similar to Fukushima's.

The Union of concerned Scientists has started an action campaign to demand safer storage of spent fuel. Click this link for action.

Originally posted to Japan Nuclear Incident Liveblogs on Sun Jun 12, 2011 at 05:47 AM PDT.

Also republished by DK GreenRoots and Nuclear Free DK.

EMAIL TO A FRIEND X
Your Email has been sent.
You must add at least one tag to this diary before publishing it.

Add keywords that describe this diary. Separate multiple keywords with commas.
Tagging tips - Search For Tags - Browse For Tags

?

More Tagging tips:

A tag is a way to search for this diary. If someone is searching for "Barack Obama," is this a diary they'd be trying to find?

Use a person's full name, without any title. Senator Obama may become President Obama, and Michelle Obama might run for office.

If your diary covers an election or elected official, use election tags, which are generally the state abbreviation followed by the office. CA-01 is the first district House seat. CA-Sen covers both senate races. NY-GOV covers the New York governor's race.

Tags do not compound: that is, "education reform" is a completely different tag from "education". A tag like "reform" alone is probably not meaningful.

Consider if one or more of these tags fits your diary: Civil Rights, Community, Congress, Culture, Economy, Education, Elections, Energy, Environment, Health Care, International, Labor, Law, Media, Meta, National Security, Science, Transportation, or White House. If your diary is specific to a state, consider adding the state (California, Texas, etc). Keep in mind, though, that there are many wonderful and important diaries that don't fit in any of these tags. Don't worry if yours doesn't.

You can add a private note to this diary when hotlisting it:
Are you sure you want to remove this diary from your hotlist?
Are you sure you want to remove your recommendation? You can only recommend a diary once, so you will not be able to re-recommend it afterwards.
Rescue this diary, and add a note:
Are you sure you want to remove this diary from Rescue?
Choose where to republish this diary. The diary will be added to the queue for that group. Publish it from the queue to make it appear.

You must be a member of a group to use this feature.

Add a quick update to your diary without changing the diary itself:
Are you sure you want to remove this diary?
(The diary will be removed from the site and returned to your drafts for further editing.)
(The diary will be removed.)
Are you sure you want to save these changes to the published diary?

Comment Preferences

JekyllnHyde, Alumbrados, Sylv, Alma, northsylvania, Mogolori, Odysseus, jennifer poole, hester, murphy, melo, laurak, Timaeus, glitterscale, Detlef, native, PeterHug, RunawayRose, bread, tommurphy, chuco35, tacet, hyperstation, eeff, MackInTheBox, elfling, frisco, ZAPatty, expatjourno, hubcap, davelf2, silence, Heart of the Rockies, Zinman, afox, stunster, Ian S, ATinNM, Pithy Cherub, cosmic debris, barath, chimpy, Ignacio Magaloni, ornerydad, davis90, Tomtech, emmasnacker, Dallasdoc, pat bunny, leevank, Lawrence, johanus, churchylafemme, BlogDog, alizard, barbwires, cevad, Deward Hastings, Albanius, vacantlook, boran2, bibble, Frank Vyan Walton, libnewsie, nailbender, joanneleon, Into The Woods, ExStr8, maybeeso in michigan, bloomer 101, 3goldens, Tinfoil Hat, wsexson, ZappoDave, basquebob, juliesie, trinityfly, Laurence Lewis, ratzo, Annalize5, SaraBeth, Sun Tzu, Kayakbiker, sofia, Phil S 33, blue jersey mom, Rex Freedom, jeff in nyc, Sandino, Isara, deepsouthdoug, Pluto, Eileen B, the fan man, troutwaxer, Snud, jay23, Jim R, Jim P, Paul Ferguson, redcedar, kumaneko, Patriot Daily News Clearinghouse, vigilant meerkat, Russgirl, tonyahky, HoundDog, seefleur, AoT, compbear, Loonesta, The Wizard, fromer, NNadir, Gottlieb, Lefty Coaster, blueoasis, DarkestHour, JVolvo, Preston S, boatsie, dirtfarmer, middleagedhousewife, BlueMississippi, BlueSue, doingbusinessas, Clive all hat no horse Rodeo, suspiciousmind, Cassiodorus, MadMs, Eikyu Saha, SeekCa, Nulwee, Thinking Fella, One Pissed Off Liberal, bear83, RWood, out of left field, Cali Techie, Habitat Vic, Mr K, tgypsy, Debs2, BruceMcF, Mary Mike, jeanette0605, Jimdotz, terabytes, cyncynical, mudslide, SeaTurtle, jnhobbs, millwood, jhop7, gchaucer2, OIL GUY, Got a Grip, cacamp, GANJA, rogerdaddy, KLS, also mom of 5, hulagirl, weegeeone, OleHippieChick, mamamedusa, bythesea, wade norris, CDH in Brooklyn, Sharon Wraight, Akonitum, KJG52, VL Baker, OregonOak, Lujane, Cassandra Waites, dewley notid, icebergslim, pickandshovel, mofembot, ashowboat, Horsefeathers, HamdenRice, BYw, Executive Odor, Quilldriver, ekyprogressive, Ellinorianne, sydneyluv, watercarrier4diogenes, maxcat06, 207wickedgood, Rhysling, smellybeast, J M F, Lura, nchristine, carolyn urban, LeftOfYou, Nebraskablue, dfe, JesseCW, Daily Activist, elziax, obiterdictum, asym, sfarkash, Lacy LaPlante, tote, louisev, Andhakari, Dragon5616, Adept2u, RhymesWithUrple, flitedocnm, Radical def, sunny skies, Eddie L, samanthab, Earth Ling, melfunction, rja, skillet, Oh Mary Oh, progdog, Dems in 08, Vega, Colorado is the Shiznit, jm214, soothsayer99, GollyMissMolly, California06, Teiresias70, marleycat, sethtriggs, PrescottPatriot, Wheever, Coastrange, floridablue, worldlotus, destructiveanachronism, Tyto Alba, Caddis Fly, Niphead, Miggles, too many people, joanbrooker, DRo, Regina in a Sears Kit House, Tom Seaview, Mathazar, Rejoinder, Only Needs a Beat, chmood, KiB, tomasyn, ursoklevar, Siri, S F Hippie, SGWM, Joieau, Lorinda Pike, kait, TBug, radical simplicity, JustinBinFL, evergreen2, amry

Subscribe or Donate to support Daily Kos.

Click here for the mobile view of the site