
the penetrations are of various sizes elaine,, and there are seals to prevent reactor water from leaking out...one type of seal is the graphatar seal which is made of graphite... there are several seal types... when they say there is a hole or holes in the bottom head from the corium they typically are refering to those different sizes of penetration
by dean 5/28/2011 9:55:10 PM

your welcome elaine
by dean 5/28/2011 9:55:20 PM

ralph get a permanent marker
by dean 5/28/2011 9:55:43 PM

@ralph if you use the Chrome browser it has built in spell check and highlights mispelt words
www.google.comby elainekirk 5/28/2011 9:58:26 PM

Ralph.. I would think the largest drives would be the safety rods.. o r blades as they call them..then control rods, then the smaller penetration drives for the nuclear instrumentation drive which positions an ionization chamber in the core
by dean 5/28/2011 10:00:05 PM

Onagawa NPP has some pretty high levels? from Fuku I assume but does it mean they are working with protective gear on, I hope so. Daini is listed as 'publicised elsewhere' but no hint as to where
www.nisa.meti.go.jpby elainekirk 5/28/2011 10:05:52 PM

@ukval it did have a spiill during an aftershock a while back
by elainekirk 5/28/2011 10:17:41 PM

@nancy have you seen @panserbjornes pin up top?
by elainekirk 5/28/2011 10:23:10 PM

@veenie you sais saturday/sunday and here we are- only problem for tepco is that they thought the typhoon was going to come along and they could lose it in the ocean but they may have to rethink -
by elainekirk 5/28/2011 10:39:06 PM

Nisa/Meti IAEA briefing
"Licensees of reactor operation in Japan have voluntarily implemented their own measures for
preventing severe accidents and mitigating the impacts based on “Accident management as measures
against severe accidents in light water nuclear power reactor facilities (formulated by the NSC on May
”. 1997) , and partially revised on October 20 2828 1992 and partially revised on October 20 1997)"
www.nisa.meti.go.jpby elainekirk 5/28/2011 10:43:11 PM

ralph.. yes they are immediately on the bottom head.. there are other penetrations that are up the radius of the bottom head that would be candidates to either melt or... flow through
by dean 5/28/2011 10:47:25 PM

by elainekirk 5/28/2011 10:51:19 PM