Thursday, June 20, 2013

#Fukushima I Nuke Plant: TEPCO Says Another ALPS Tank Has a Pinhole in the Weld

Just as I was wondering in my previous post, TEPCO confirmed they found a pinhole in the other Batch Treatment Tank of the same line (Line A) of ALPS, multi-nuclide removal system contracted by Toshiba.

There are three lines (A, B and C) in ALPS, and each line has two Batch Treatment Tanks which receive contaminated water which has been treated by SARRY (cesium absorption).

From Jiji Tsushin (6/20/2013):


Minute hole in a different tank in ALPS system, at Fukushima I Nuke Plant


Concerning the small leak of contaminated water from a tank in ALPS multi-nuclide removal system at Fukushima I Nuclear Power Plant, TEPCO announced on June 20 that the other tank in the same line had a pinhole in the weld. According to TEPCO, there is no leak from the hole.


According to TEPCO, there are two tanks each in the three lines of ALPS to store contaminated water. After the discovery of the leak in one tank, TEPCO inspected the other tank and found a pinhole in the weld, just like the first tank.


This line [A] was conducting the test run, but since stopped after the discovery of the leak. There is no contaminated water in the tank where a pinhole was discovered this time, according to TEPCO.

TEPCO at least has some wits about them to inspect the other tank. What a surprise. Now, how about the same tanks in other two lines? What about other tanks and vessels that are all welded?

I'm sure the Nuclear Regulatory Authority, very proud of their "world toughest safety standard" they managed to come up with in less than 10 months, will make sure every weld is done properly.


Anonymous said...

According to NHK the "new" safety standard leaves wide discretionality to utilities on several key safety factors, including the estimation of the largest earthquake that could hit a plant whereby the estimation has a degree of ambiguity between -50% and +100% (!).

It looks like the new safety standard leaves too much freedom to a party with a vested interest -- like the old standard that led to Fukushima.


Post a Comment