Recent content by I_P

etudiant, Hiddencamper, and Sotan, thanks for the feedback. Sotan, the report was helpful. The complete story of what happened during the accident won't be known for some time as it has not been possible yet to enter critical areas within the damaged units - correct? 5k+ workers/day average...

OK, so is there a competent, current analysis of the situation? Seems that they still don't know where the fuel is. Is #2 the only vessel that was breached in this fashion? Doesn't this knowledge imply an increased threat to the groundwater and the ice containment wall (and thus continued...

I think the idea was to photograph and record video of relevant areas and to analyze the pictures after the fact. They had specific questions so the photography should have been well targeted. We will see what they come up with.

"manage attachments" worked. I tried the url and [ I M G ] tags last time and it didn't seem to work for me. Thank you Tsutsuji

This is the image I tried to post on the previous page showing the spike in emissions after march 20th:

dbl post again - must remember to explicitly log in before trying to post a reply. Any help on guidelines/tips for posting images to the thread would be appreciated.

Thanks for that translation Tustsuji, I hope they make some progress with their inquiry and are able to resolve some of those outstanding questions - or at least shed some additional light. Regarding the earthquake damage - I recall reading that there were radiation alarms set off before the...

Thanks zapperzero, I had read through the paper but not focused on their look at the radiation releases. I tried to post a jpg above of a set of monitoring data from 3/15-3/24 but it doesn't load up - about 5mb in size. More specifically, I was interested in whether the core re-melt scenario...

managed a double post. Many aspects will likely remain forever murky/unresolved I am sure.

This paper discusses remelting of the core material following water injection: Analyses of core melt and re-melt in the Fukushima Daiichi nuclear reactors by Fumiya Tanabe, Journal of Nuclear Science and Technology Volume 49, No. 1, January (2012) pp. 18–36. Has there been modeling of the...

Thanks etudiant and nikkkom, I have had a chance to browse the last 50 pages or so and have a better sense of the state of things. Seems that the consensus is that the Unit 4 SFP was never a problem so by default the assumption is that the explosion in that unit was fueled by hydrogen from Unit...

general questions about the status of accident knowledge I haven't followed this thread for more than a year now and am curious if a clearer/consensus picture has emerged about the accident. Is it understood how/why the explosion occurred in unit 4? Was it hydrogen migration through venting...

Thanks Tsutsuji for this and all your translations/posts. Did you find their reasoning convincing? Did they have enough evidence to support this conclusion? I find myself wondering now how many years it will be before a definitive post-mortem can be worked up and a bit surprised at how...

Can it be definitively determined that there was no critical damage to the cooling systems from the earthquake prior to the tsunami (the workers reported broken pipes and flooding during the quake), or containment structures - based on the available sensor data? What was going on with #2 and #3...

This information from TEPCO is based on modeling/simulation, not observations. Until they can physically check all such determinations will be educated guesses using the external observations (like radiation levels, composition of the emitted particles, sensor readings, etc) as inputs. The...