Overview
- An alarm meant to trigger when additional control rods are withdrawn failed to sound during a January 17 test at Unit 6.
- TEPCO reported the deviation from prescribed operational limits and returned the withdrawn control rod to its original position.
- The company continued investigative work on January 18, saying the cause is being examined carefully.
- The restart had been scheduled for January 20, and TEPCO acknowledges the date could slip depending on the findings.
- According to detailed accounts, the alarm did not activate after one rod was pulled and a further withdrawal was attempted during pre-restart checks.