CoreMelt is now making the power of mocha tracking in FCP X available completely free. You just need to request a license through our automated form and you will receive a permanent license which lets you use mocha tracking with oval and rectangle masks. Although this is just a small amount of the power of our full SliceX product, it still allows you to perform a lot of common useful tasks.
It was later revealed that workers were minutes from restoring power to the standby liquid control (SLC) system pumps in unit 2 as a way to inject borated water once the RCIC shut down and had spent hours laying cable from a generator truck to the unit 2 power center when the unit 1 explosion occurred. This damaged the cable preventing this method from being used. It is possible this system could have prevented a complete meltdown as it took hours after the explosion until injection using fire trucks could be started.[57]
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While admitting that the suppression pool at the bottom of the containment vessel had been damaged in the explosion, causing a drop of pressure there, Japanese nuclear authorities emphasized that the containment had not been breached as a result of the explosion and contained no obvious holes.[66] In a news conference on 15 March the director general of the IAEA, Yukiya Amano, said that there was a "possibility of core damage" at Unit 2 of less than 5%.[67] Japan's Nuclear and Industrial Safety Agency (NISA) stated 33% of the fuel rods were damaged, in news reports the morning of 16 March.[68] On 30 March, NISA reiterated concerns about a possible Unit 2 breach at either the suppression pool, or the reactor vessel.[69] NHK World reported the NISA's concerns as "air may be leaking", very probably through "weakened valves, pipes and openings under the reactors where the control rods are inserted", but that "there is no indication of large cracks or holes in the reactor vessels".[69]
Nonetheless, complete remediation of the site is likely to take three or four decades, and the biggest challenge will probably be removing all the melted fuel. The road to complete recovery will be an extremely long and expensive one.
[d]uring the initial response, work was conducted in extremely poor conditions, with uncovered manholes and cracks and depressions in the ground. Work at night was conducted in the dark. There were many obstacles blocking access to the road such as debris from the tsunami and rubble that was produced by the explosions that occurred in Units 1, 3 and 4. All work was conducted with respirators and protective clothing and mostly in high radiation fields.17
As a result, we believe it would be unfair to apportion significant blame for the accident on the actions the operators took (or failed to take) after the tsunami, as the official investigation committee has done. Furthermore, given the potential challenges of a complete loss of AC power, it is clear that prevention is the best form of management. To this end, the key questions raised by the accident are why was the tsunami hazard at Fukushima Daiichi so dramatically underestimated? And could changes in plant design (resulting from effective safety reviews) have prevented a severe accident in the event that a tsunami struck the plant? The answers to these questions help shed light on whether the accident could have been prevented.
Abstract:Using a dynamic mechanical analyzer, the comparative studies of a low-cycle bending fatigue were carried out for AISI 1022 low-carbon steel after extreme thermal exposure, simulating the severe beyond-design-basis accident at nuclear power plants. In the as-delivered state, the steel has a high resistance to low-cycle fatigue (the fatigue strength at N = 3.5 104 cycles (σNf) was 360 MPa). Long-term thermal exposure led to a slight decrease in the resistance to low-cycle fatigue of steel: σNf is decreased by 9%. The influence of AISI 1022 steel structure on the characteristics of fatigue strength and fracture mechanisms is analyzed.Keywords: low-carbon steels; low-cycle fatigue; dynamic mechanical analyzer; fatigue crack; thermal exposure; microstructure
AS per one of the later responses in this thread, I fixed this by completely uninstalling CoreMelt (everything), even deactivating my license (not sure if that was necessary but couldn't hurt), then reinstalling with the Everything Installer from CoreMelt. Then reactivated the license, and it worked well. Could be there's something wrong with the Lock and Load only installer.
I was just exiting the Tokyo subway when it hit. News reports quote people saying that the quake seemed to go on forever. That was certainly what struck me. I also noticed that plenty of locals were really scared. This was different. (The exception were a few intrepid senior citizens who kept shopping, completely at peace with the concept that each minute might be the last one.)
Hydrogen may be stored in the cladding due to hydrogen uptake during a period of steam-starved oxidation6,7 and then be released during a quenching period when the cladding may crack due to thermal stresses in cladding embrittled by a combination of oxygen and hydrogen uptake.7,8 The embrittlement of the cladding decreases its ductility to the point that the stresses induced by a temperature gradient during quenching may result in cracking of the cladding.
Evacuations around both affected nuclear plants have begun. In the 20-kilometre radius around Fukushima Daiichi an estimated 170000 people have been evacuated. In the 10-kilometre radius around Fukushima Daini an estimated 30000 people have been evacuated. Full evacuation measures have not been completed.
1.1 The hydrogen problem in Light Water Reactor safetyLight Water Reactor (LWR) safety studies have shown [1, 2] that in the very rare event of1055 of coolant accidents (LOCA) or plant transients, combined with complete failure of themultiple safety injection systems, the reactor core will heatup and can be damaged severely.At temperatures above 1300 K metallic components of the core and the fuel can react withsteam to produce hydrogen according to the following reactions:Zr + 2H20 -1 Zr02 + 2H2+ 576 kJ/mole Zr,2Cr + 3H20 -1 Cr203 + 3H2+ 2 186 kJ/mole Cr)Fe + H20 -1 FeO + H2+3 kJ/mole Fe, 2ff7e9595c
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