3. Countermeasures
1) We trained our welding section employees once again;
a. About acceptable quality of welding (welds & shape, provides slop)
Shows acceptable/not acceptable photos.
b. importance of managing the length of the tip of the tungsten rod is
2mm.
2) Changed the process of leakage check with helium gas tester
Firstly bending the tube by finishing section staff after that helium gas
check.
3) Put the mark(Pink mark) on the shrinkable tube for the first lot which will be
done above countermeasures.
4) Issue the inspection report which is provided the mark.