The Japan Nuclear Energy Safety Organization admitted it allowed nuclear fuel rods to pass quality checks using a faulty factory manual.

Government inspectors used the manufacture’s manual to inspect four sets of fuel rods.  They approved three of the sets.  The problem is that the approved sets did not match up with the length stated in the manual.  The rods were four meters (13 feet) long, the manual said they should have been 5 centimeters shorter.

Government officials say they will correct future inspections.