so that TEPCO can conserve water that is being injected into the RPVs.
The robot "Quince" went to the 2nd floor of Reactor 3's reactor building at Fukushima I Nuclear Power Plant on July 26 and measured the radiation. It was as high as 75 millisieverts/hour on the 2nd floor. To help "Quince", 6 TEPCO employees went to the reactor building (I don't think they were inside the building), and received maximum 2.22 millisieverts of radiation.
TEPCO's handout for the press on July 27, radiation measurement by Quince:
No radiation level is too high for carbon-based workers in the time of crisis, and TEPCO is sending 6 of them up the stairs to the 2nd and 3rd floors of Reactor 3 on July 27. However, the amount of time the workers spend inside the reactor building will be limited, according to TEPCO. The workers are to conduct the survey to determine whether it is possible to hook up the water injection system to the ECCS (emergency core cooling system) pipe, so that the water could be poured directly over the melted fuel (if there's melted fuel left in the RPV, that is) and thus more efficient (i.e. using less water) in cooling the fuel.
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3 comments:
".. to hook up the water injection system .. so that the water could be poured directly over the melted fuel (if there's melted fuel left in the RPV, that is) .."
If they then claim they're injecting it directly onto the core, they'll have to report dropping temps. and reduced water required to do so.
If they do not get reduced temps., they have to admit it's in the basement and continue the same water volume.
This core shroud water injection gives a little insight for the nitrogen injection, hydrogen must still be detected because shroud water injection is not flowing well around their supposed corium location.
SNAFU...kushima !
Cooling is critical. While in this case it sounds like the fuel has melted, there could be an issue with the procedure/timing for accidents due to defects in the fuel rod bundles. So even LESS time for cooling actions due to power loss. See http://www.unplugsalem.org/PDF/20050628_ucs_brief_ge_fuel_defects.pdf
This refers to GE12 and GE14, used by a similar GE reactor to Fukushima. Any site with the defective spacers needs to be aware of the issue...
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