Recent content by michael200

H2 detonation at u3 caused the fuel pool to go critical?? About as likely as caused by aliens with death rays. Why are people giving credence to this nonsense.

Clancy688 That's the multibillion dollar question.

The U3 radwaste building would correspond to the radiation levels of 60 and 35 msv/hr. the radwaste building is to the left of the U3 reactor building.

In my reply to your earlier comment, which in my opinion you were jumping to the conclusion that the finding of a high dose source on the site somehow "proved" that fuel fragments/corium had somehow ejected onto the site, I was attempting to point out that there are other possibilities for the...

Just because high dose material has been found on the site is not surprising. The destroyed building next to the unit 3 reactor building is the radwaste building. Also I would not be suprised if the u3 and u4 fuel pool demineralizers were damaged in the explosions. Radioactive does not mean...

Even if recirc pump seals fail there is a breakdown nudging to limit leakage to less than 60 gpm with reactor operating pressure of 1050 psi . Leak rate would be much less at lower rpv pressure.

Let's please stop this discussion about "double layers" of fuel in the SFP. The depth of the fuel pool is about 40 ft and the height of a fuel assembly in the SFP racks is about 14 ft. Plant technical specifications require a minimum water level of about 20 ft above irradiated fuel in the SFP...

oops http://www.jnes.go.jp/seismic-symposium10/presentationdata/3_sessionB.html

in same link: http://www.dailymail.co.uk/news/article-1375120/Japan-Remote-controlled-concrete-pump-delivered-Fukushima-nuclear-plant.html?ito=feeds-newsxml Picture of Tsunami impact at fukushima 1 site.

If the drywell is flooded, then probably only thing they can do is attempt to monitor through the post accident sampling system (PASS). Unfortunately, like everything else, there is a need to have some electrical power for this system. Considering the general area dose rates that they are...

amongst many other things, I'd be curious to know if the japanese also implemented something similar to the USNRC regulatory guide 1.97 for post accident monitoring.

Minimum debris retention rate (MDRIR) is the lowest RPV injection rate at which it is expected that core debris will be retained in the rpv when rpv level cannot be determined to be above the bottom of active fuel. It is utilized to ensure that injection into the Rpv is sufficient to remove...

Your picture is of a different refueling bridge design.

Cause of Fukushima Unit 4 damage It is reported that the cause of the unit 4 building damage was a H2 explosion caused by overheating of the discharged fuel in the U4 spent fuel pool. To the best of my knowledge, there is no photgraphic evidence of the explosion. Something that has troubled...

TCup: this is in reply to your post #2521. I posted a reply to an article that appears on the Atomic insights blog http://atomicinsights.com/2011/04/fukushima-nuclear-accident-exceptional-summary-by-murray-e-miles.html I'll repost here since I don't know if the moderator of the other...