Fukushima News Atmosphere High Dose Difficult Area Translated Tepco PDF
Channel: Strontium Milks
Date: 2016-09-14

The atmosphere is also currently high dose, research is difficult area! Circumstances relating to the investigation]  Tokyo Electric Power Holdings Co., corresponding circumstances,  latest atmosphere dose,  using a remote heavy machinery, etc. For installation of the investigation and temporary drainage facilities water level and water quality,  temporary drainage of water level and water quality.  Early  September, the installation of temporary drainage facilities are planned through mid-September to early-September. rainy weather or the like because of the influence and the camera of poor visibility and become risk to the robot, 
The stagnant water of 2 1/2 Unit exhaust tube drain 

The establishment of a research and temporary drainage of water level and water quality by using a remote robot or the like mock-up survey results to the due measures implemented content to 3D drawings 

Unit exhaust tube drain sump pit (2/5)  crawler-type robot is crowded suspended by a crane to the pit west installation. Crane type robot is installed on the west side road.  robot operation is performed than 1 / No. 2 exhaust stack monitor equipment housed in the shed (about 0.04mSv / h).Crane type robot crawler-type robot use robot 1/2  No. exhaust stack monitor equipment storage shed crawler-type robot crane type robot NS 1/2 Unit exhaust tube

1/2 Unit exhaust tube drain sump pit to is, do some opening by a remote robot  the pit cover and cover in the inspection opening. 
The opening of  pit cover mainly crawler-type robot, 
the opening of the cover in the inspection opening is carried out by a crane-type robot. 

Figure 2 crane-type pit in the inspection port opening work by the robot 5 1 / Unit 2 measures implementing the contents of the exhaust stack drain sump pit  4/5) after some opening of  cover the inspection port, check the pit in the water level 
in the water level meter, and then set up a transfer piping. 
Figure 3 at the crane-type pit water level check and transfer piping installation image hydraulic hand by the robot, transport for the installation grips the water level gauge at the hydraulic hand confirmation pit cover cover the inspection opening simple water level meter pit in the water level pit piping If there is accumulated water to implement countermeasures.

Unit 1 reactor building of Unit 2 reactor building of Unit 2 waste treatment building of Unit 1 waste treatment building 1/2 
 then aged in bags, etc. as well as the removal prevention, placing the containers and the like. during transport to monitor at all  at the time of rainy weather, etc. since it is affected and the camera of poor visibility and become risk to the robot, there is a possibility to change the process.  accumulates in the stagnant water sampling pit pit water transport water gauge installed 8 [Reference] radioactive from power plant 

Substance performs overhaul about the risks of radioactive material from leaking outside the premises 
from  power plant  [corresponding historical reasons] corresponding history of the leaking risk outside the premises, 
can flow out to the sea via the K drainage one risk.

Have reported the possibility of overflow and outflow from 1/2 Unit stormwater drain sump pit that has flowed into the exhaust pipe. Because the area is of high dose, the presence or absence of overflow from the pit had not been confirmed.  For K drainage, pollution sources Units 1 to 4 western slopes to investigate, 
as an example of factors such as rubble and mud deposited on the roads part Oyobiya root (soil), water sampling analysis of the branch pipe performed and route survey, are sequentially carried out  individual measures.  In addition, in order to prevent the contamination of rainwater and groundwater 
as radioactivity concentration measures for reducing K drainage, cleaning of roads, gutters and drainage passage, removal of debris removal and soil of the slope and the building and around the roof surface , inflow prevention of sediment due to the surface of the facings, are working to pollution reduction by installing a drainage canal and zeolite sandbags and new purification material to the branch pipe. 

Tepco pdf in Japanese https://www4.tepco.co.jp/nu/fukushima-np/handouts/2016/images2/handouts_160825_02-j.pdf

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