[Reactor2] Tepco is having a difficulty to install a new RPV thermometer

Every time Tepco measured extreme change of PCV temperature, they concluded that the thermometer was out of order historically.

They have few sound thermometers left at this moment, they are seeking the chance to install alternative RPV thermometer in reactor2, but apparently it is very difficult.

 

– In order to confirm the soundness of the pipe to which the RPV alternative thermometer will be installed, water was flushed from the temporary pump through the pipe (July 12).

– Since the pressures of the temporary pump and the temporary pressure gauge increased after flushing approx. 15L of water, the pressures have been monitored.

-The pressure went down to 148kPa, however it is taking time for the pressure to stabilize. The temporary pressure gauge reading today was approx. 100kPa, which is lower than yesterday.

-Based on the above, it can be assumed that some parts of the SLC differential pressure detection pipe may be clogged. Tepco will evaluate this in detail and consider how thermometer installation can
be done.

 

 

 

Source

 

 

Iori Mochizuki