{"id":2211,"date":"2011-04-01T11:27:28","date_gmt":"2011-04-01T09:27:28","guid":{"rendered":"http:\/\/nuclearpoweryesplease.org\/blog\/?p=2211"},"modified":"2013-03-01T00:44:32","modified_gmt":"2013-02-28T22:44:32","slug":"three-weeks-after-the-tsunami","status":"publish","type":"post","link":"https:\/\/nuclearpoweryesplease.org\/blog\/2011\/04\/01\/three-weeks-after-the-tsunami\/","title":{"rendered":"Three weeks after the tsunami"},"content":{"rendered":"

Update 18:00(CET)\/16:00(UTC)\/01:00(JST)<\/strong><\/p>\n

The new JAIF update<\/a> is out. Temperature of the core in Reactor one has gone down and pressure gone up slightly. They have added the water level of the radioactive water in the tunnels they are trying to empty. They now write that they suspect the pressure vessels of reactor number 2 and 3 are no longer airtight but they don’t think there are any holes or crack. A cryptic statement and I wish they would release more information on what they mean exactly. Doesn’t seem possible to exclude a small breach in a few control rod guide tubes due to dripping corium(molten core material). At the same time the temperature readings in the lower head of reactor 3 excludes that the entire bottom has gone out due to massive melting through the vessel. In reactor 2 one neither has any temperature reading from bottom head or any pressure reading within the vessel.<\/p>\n

Update 11:00(CET)\/09:00(UTC)\/18:00(JST)<\/strong><\/p>\n

JAIF has released a update<\/a> (data from 07:30 JST today) and radiation trends<\/a> and NISA has an update from yesterday(06:00(JST) march 31).<\/p>\n

Reactor 1:<\/strong>
\nWater level in the core: 1.65 (1.65) meters below the top of fuel assemblies
\nFlow rate of injected water: 133 liter\/minute
\nCore pressure: 583(612) kPa
\nContainment pressure: 175(210) kPa
\nCore temperature(feedwater nozzle): 256.2 (251.2) Celsius
\nCore temperature(bottom head):\u00a0128 Celsius
\nDose rate within containment: 41.7 Sv\/hour<\/p>\n

Reactor 2:<\/strong>
\nWater level in the core: 1.5 (1.5) \u00a0 meters below the top of fuel assemblies
\nFlow rate of injected water: 150 liter\/minute
\nCore pressure: unknown
\nContainment pressure: 110 (110) kPa
\nCore temperature(feedwater nozzle): 181.2 Celsius
\nCore temperature(bottom head):\u00a0Unknown
\nDose rate within containment: \u00a038.7 Sv\/hour
\nSpent fuel pool temperature: \u00a058 Celsius<\/p>\n

Reactor 3:<\/strong>
\nWater level in the core: 2.25 (2.3) \u00a0meters below the top of fuel assemblies
\nFlow rate of injected water: 116 liters\/minute
\nCore pressure: 117 (121) \u00a0kPa
\nContainment pressure: 173 (176.4) kPa
\nCore temperature(feedwater nozzle): 88.5 Celsius (under review)
\nCore temperature(bottom head):\u00a0114.2 Celsius
\nDose rate within containment: \u00a025.7 Sv\/hour<\/p>\n

 <\/p>\n

Pressures and temperatures seems to be quite stable,\u00a0albeit\u00a0high in the number 1 reactor. Nothing new really on the status of the 3 reactors. \u00a0A temporary pump used to pump water into the number 2 spent fuel pool has\u00a0malfunctioned\u00a0and we can see a increasing trend in the water temperature.<\/p>\n

They are shifting around water in different places to be able to make room somewhere to pump away the junk water in the basements of the turbine buildings. In order to be able to\u00a0access\u00a0the coolant pumps needed to restore the proper cooling of the reactors.<\/p>\n

The JAIF radiation trends<\/a> show that there was big emissions during the 15th and 16th and after that a declining trend. There doesn’t seem to be any\u00a0continuous\u00a0emissions from the plant and the emission spikes corresponds with the venting of the containments and following explosions and fires in the reactor buildings. Unless a new need to vent the containments arises, then there shouldn’t be any new big emissions. By now the I-131 content of the reactors have decayed down to a quarter of initial amount and for every week(8 days to be precise) they can prevent venting the amount will further be cut in half. I-131 will stop being a problem after about 80 days, by that time the amount will have been reduced to one\u00a0thousandth\u00a0of the initial amount. Cs-137 will of course continue to be a problem with a half life of 30 years.<\/p>\n

TEPCO has once again<\/a> measured wrongly activities in water, but it is likely the ground water<\/a> around the plant is contaminated. Source of the contamination is unknown but TEPCO suspects<\/a> its been carried by rain after the initial ventings.<\/p>\n

Situation is serious, but it doesn’t seem to deteriorate anymore.<\/p>\n

 <\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

 <\/p>\n

Links(English)<\/strong>
\nReuters Japan nuclear crisis drags on<\/a>
\nGeorge Monbiot describes the double standards used to evaluate nuclear <\/a><\/p>\n

Blogs(English)<\/strong>
\nCharles Barton Nuclear Safety and George Monbiot<\/a>
\nNEI nuclear notes Appeal of small reactors might increase after Fukushima<\/a>
\nRod Adams Monbiot debates Caldicott <\/a><\/p>\n

Links(Swedish)<\/strong>
\nSvD Svenskar tror p\u00e5 k\u00e4rnkraft<\/a><\/p>\n

Blogs(Swedish)
\nFr\u00f6jdhpunkt S\u00e5 mycket hade k\u00e4rnkraft kunnat minska utsl\u00e4ppen<\/a>
\nInslag.se Pudelns k\u00e4rnkraft<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Update 18:00(CET)\/16:00(UTC)\/01:00(JST) The new JAIF update is out. Temperature of the core in Reactor one has gone down and pressure gone up slightly. They have…<\/p>\n

Continue readingThree weeks after the tsunami<\/span><\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/posts\/2211"}],"collection":[{"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/comments?post=2211"}],"version-history":[{"count":6,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/posts\/2211\/revisions"}],"predecessor-version":[{"id":2225,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/posts\/2211\/revisions\/2225"}],"wp:attachment":[{"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/media?parent=2211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/categories?post=2211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuclearpoweryesplease.org\/blog\/wp-json\/wp\/v2\/tags?post=2211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}