INSAG chairman highlights safety and security challenges.

The article focuses on the letter issued by International Safety Advisory Group (INSAG) chairman Richard Meserve to International Atomic Energy Agency director-general Mohamed ElBaradei in Vienna, Austria. In the letter, Meserve highlights several measures in the assessment of safety performance including unplanned shutdowns, safety equipment availability, and employee's radiation exposure. He also suggested possible opportunities for nuclear power plant operators to enforce safety.