Related Rule
Practice Relating to Rule 147. Reprisals against Protected Objects
Section F. Works and installations containing dangerous forces
Switzerland’s ABC of International Humanitarian Law (2009) states:
Means and methods of warfare
Even in war not everything is allowed. Various means and methods are prohibited, including … Reprisals against the civilian population or against non-military objectives[.]
International humanitarian law does not include any general prohibition of reprisals. There are however numerous provisions that prohibit specific types of reprisal … Also prohibited are reprisals against certain specific objects such as … installations that may cause a dangerous situation to occur (e.g. nuclear power stations and dams). 
Switzerland, Federal Department of Foreign Affairs, ABC of International Humanitarian Law, 2009, pp. 29 and 37.