Recent content by Samy24
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Is it plausible, that 3 sensors fail at the same time. I have attached a list of temperatures from Tepco reports and marked the three sensors in doubt. No 1 (the "failed sensor") has nearly the same temperature as No 2. So No 1 and No 2 are correct or both failed in the same way. No 3 is now at...- Samy24
- Post #12,321
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
TEPCO may see this a little different. Again the water flow from the two pathes was increased. Now at 18 m³/h.- Samy24
- Post #7,556
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Because of the rising temperatures they may fear criticality in unit 3. http://www.tepco.co.jp/en/press/corp-com/release/11051503-e.html"- Samy24
- Post #7,259
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
It's a paddling pool for their children filled by a garden hose. Sorry for that not really technical response.- Samy24
- Post #7,225
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
It's just a joke. That is not real!- Samy24
- Post #7,222
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
TEPCO has only "repaired" the reactor water level sensor A. Sensor B is the old one. A is reported as "Off scale" (water level lower than 5 m below the "former" top of fuel) .- Samy24
- Post #6,988
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
TEPCO increase the water flow to the reactor from 6 t/h to 9 t/h in response to the increasing temperature at unit 3. The water level will rise and you can be sure the water will "find" it's way.- Samy24
- Post #6,562
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Interresting is that the radiation in the SFP should come from the reactor core of unit 3 and not from the fuel in the pool. How is it possible that the explosion at unit 3 could "extract" fuel from the core to the pool? http://www3.nhk.or.jp/daily/english/10_30.html"- Samy24
- Post #6,425
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Not all readings are down that much. But you are correct the mass is >100t and there sould be a delay in the temperature change. Maybe at the measurement point with the biggest drop there was no water before. After the change of the injection path there is now water at that place.- Samy24
- Post #6,364
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Looks like they have manged it! http://www.tepco.co.jp/nu/fukushima-np/f1/images/032_1F3_05100600.pdf- Samy24
- Post #6,359
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
The first time I read this document I believed the cores could have been melted completely. Time without water and CAMS radiation readings point straight to this. (I'm not a nuclear engineer.) http://www-pub.iaea.org/MTCD/publications/PDF/te_955_prn.pdf"- Samy24
- Post #5,991
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Maybe "they" have learned the lession? http://www3.nhk.or.jp/daily/english/06_27.html" http://www3.nhk.or.jp/daily/english/06_31.html"- Samy24
- Post #5,990
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Thanks. That is a good and actual source. All the temperature readings are going up. So we can asume not all the instruments have the same failure. Even TEPCO does this interpretation and increased the water flow by a very big amount. Interesting is, that the amount of water did not help to...- Samy24
- Post #5,875
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
Where did you get this data? Newest on meti is report 125.- Samy24
- Post #5,852
- Forum: Nuclear Engineering
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Japan Earthquake: Nuclear Plants at Fukushima Daiichi
The 205°C is "RPV bellows seal"- Samy24
- Post #5,600
- Forum: Nuclear Engineering