Ukrainian Employees connects Nuclear Plant to the Internet so they can Mine CryptoCurrency

Employees abused systems at Ukrainian nuclear power plant to mine cryptocurrency. 

As reported by the ZDnet, the Employees of Ukranian Nuclear Plant connected the internal part of the plant to the internet for mining cryptocurrency. This incident happened in past July at the South Ukraine Nuclear Power plant.
This incident was first reported by the Ukrainian news site UNIAN.

The Ukrainian Secret Service(SBU) is investigating the case of employees at a nuclear power plant who is looking at the incident as a potential breach of state secrets due to the classification of nuclear power plants as critical infrastructure such kind of incident could potentially expose high-sensitive information.
On July 10, agents of the SBU raided the nuclear power plant and discovered the equipment used by the employees to Mining Cryptocurrency.

The SBU seized equipment composed of two metal cases containing that included coolers and video cards (Radeon RX 470 GPU), computer components commonly used in mining factories.

No Employees were arrested till now.

As these incidents, The authorities have charged several employees, but at the time, none was arrested.