Japan Earthquake: nuclear plants

SteveElbows

Yes, but reactor 4 not reactor 3.

westfield

No visible tsunami damage to that building. The corner that is opened up is actually closer to unit 4. The images are not the best but it seems there might be more displaced cladding post U4 explosion.


After Tsunami, then after U3 explosion , finally after U4 explosion

zapperzero

Yep. Thanks. You are of course referring to the concrete "cladding" of the switching building, yes?

westfield

I was looking at the sheet steel cladding thats come off that U3 & 4 HV switch building and is laying on the ground around it. The images are not great but I thought there may be more of the wall cladding laying around after the U4 explosion vs before. Difficult to say either way.......looking for something more interesting in that bunch of unreleased images now.

westfield

Unit 2 transformer yard - oil level is a little on the low side

tsutsuji

http://www.physicsforums.com/showthr...=1#post4064974 Translation [installment 1: abstract]
http://www.physicsforums.com/showthr...=1#post4068601 Translation [installment 2: remote decontamination]
http://www.physicsforums.com/showthr...=1#post4069889 Translation [installment 3: PCV leakage points identification]
http://www.physicsforums.com/showthr...=1#post4071111 Translation [installment 4: PCV repairs]

Translation [installment 5: surveys inside PCV]

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tsutsuji

Translation [installment 5: surveys inside PCV]

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tsutsuji

Translation [installment 5: surveys inside PCV]

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tsutsuji

http://www.physicsforums.com/showthr...=1#post4064974 Translation [installment 1: abstract]
http://www.physicsforums.com/showthr...=1#post4068601 Translation [installment 2: remote decontamination]
http://www.physicsforums.com/showthr...=1#post4069889 Translation [installment 3: PCV leakage points identification]
http://www.physicsforums.com/showthr...=1#post4071111 Translation [installment 4: PCV repairs]
http://www.physicsforums.com/showthr...=1#post4073726 Translation [installment 5: surveys inside PCV]

Translation [installment 6: RPV/PCV integrity assessment]

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tsutsuji

Translation [installment 6: RPV/PCV integrity assessment]

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tsutsuji

Translation [installment 6: RPV/PCV integrity assessment]

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tsutsuji

http://www3.nhk.or.jp/news/genpatsu-...chusuiryo.html On 13 September Tepco said the injection rate problem had been solved, but the injection rate declined again on 14 September (a 10% decline at unit 1 from 09:00 PM on 13 September to 01:00 AM on 14 September, and a decline from 01:00 AM to 07:00 AM at unit 2). In both caes the needed rates were secured. As a countermeasure, Tepco is increasing the injection rates. Tepco suspects foreign bodies are remaining in the pipes.

etudiant

Guess it is not easy to put in a strainer just before the pipes enter the reactor when everything is seriously contaminated.

tsutsuji

http://www.physicsforums.com/showthr...=1#post4064974 Translation [installment 1: abstract]
http://www.physicsforums.com/showthr...=1#post4068601 Translation [installment 2: remote decontamination]
http://www.physicsforums.com/showthr...=1#post4069889 Translation [installment 3: PCV leakage points identification]
http://www.physicsforums.com/showthr...=1#post4071111 Translation [installment 4: PCV repairs]
http://www.physicsforums.com/showthr...=1#post4073726 Translation [installment 5: surveys inside PCV]
http://www.physicsforums.com/showthr...=1#post4076720 Translation [installment 6: RPV/PCV integrity assessment]

Translation [installment 7: open competitive biddings]

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tsutsuji

Translation [installment 7: open competitive biddings]

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tsutsuji

Translation [installment 7: open competitive biddings]

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tsutsuji

Additional information about the long term research and development effort is included in the presentations from the 7 August "workshop on machinery and equipments toward the decommissioning of Fukushima Daiichi NPP" held in Koriyama city: http://www.meti.go.jp/earthquake/nuc...120810_01.html

http://www.meti.go.jp/earthquake/nuc...120810_01b.pdf Program
http://www.meti.go.jp/earthquake/nuc...120810_01c.pdf Presentation (1) Middle and long term roadmap and research and development
http://www.meti.go.jp/earthquake/nuc...120810_01d.pdf Presentation (2) Fukushima Daiichi general situation
http://www.meti.go.jp/earthquake/nuc...120810_01e.pdf Presentation (3) Practical use of technical catalogue public appeal results
Session 1:
http://www.meti.go.jp/earthquake/nuc...120810_01f.pdf Development of remote decontamination techniques inside buildings
Session 2:
http://www.meti.go.jp/earthquake/nuc...120810_01g.pdf Development of PCV leakage points identification techniques
http://www.meti.go.jp/earthquake/nuc...120810_01h.pdf Development of PCV repair techniques
http://www.meti.go.jp/earthquake/nuc...120810_01j.pdf Development of PCV internal survey techniques