How vulnerable are nuclear plants to deliberate attack?

What's happening at the Chinese nuclear plant near Hong Kong?

The French joint operator of a Chinese nuclear plant near Hong Kong says the plant is dealing with a "performance issue" but is currently operating within safety limits, following a report of a potential radioactive leak.

The IAEA maintains a website reporting recent nuclear accidents. The abandoned city of Pripyat, Ukraine, following the Chernobyl disaster. The Chernobyl nuclear power plant is in the background. The worst nuclear accident to date was the Chernobyl disaster which occurred in 1986 in Ukraine.

Serious nuclear power plant accidents include the Fukushima Daiichi nuclear disaster (2011), the Chernobyl disaster (1986), the Three Mile Island accident (1979), and the SL-1 accident (1961). Nuclear power accidents can involve loss of life and large monetary costs for remediation work.