As of 27.06.2017 due to the cyber attack: the SSE ChNPP's official website was not accessible, servers for controlling the local area network and auxiliary systems of SSE ChNPP information resources (mail server, file-sharing servers, Internet resources' access server, electronic document flow system server) were switched off. There was partial failure in operation of personal computers of workplaces of operators of individual radiation monitoring systems without loss of the control function as a whole.

From the time of the attack the compensation measures to monitor radiation situation of the ChNPP industrial site have been developed and are under implementation. The monitoring is performed by the instruments. Changes in the radiation situation parameters have not been recorded. The control levels are not exceeded.

At the moment (29.06.2017) all other technological systems, including the Integrated Automated Monitoring System of Shelter Object (IASK), Integrated Shelter Database (ISDB), Module «Karma» - operational account of personnel radiation doses, personnel access control system to ChNPP (SKDP), and other technological systems are operated in routine regime.

Operation of the website and servers, main and auxiliary services has been restarted; the Internet access was resumed. Testing and performance restoration of information systems and personnel workplaces are underway.

On June 21, the Cabinet of Ministers of Ukraine reviewed and agreed the draft Law of Ukraine "On Amendments to the National Programme for Decommissioning of the Chornobyl NPP and Transformation of the Shelter Object into an Environmentally Safe System", which provides for implementation and funding of the relevant activities during subsequent years and budgetary financing of the relevant activities until 2020. 

"In view of the recommendations of parliamentary hearings of the Verkhovna Rada of Ukraine over recent years, which constantly emphasized the need to update the National Programme, we developed amendments to the Programme that should be approved in order to implement the main measures for decommissioning of the Chornobyl NPP and transformation of the Shelter Object into an ecologically safe system. The fulfillment of these tasks will ensure the national security of Ukraine and will allow creating conditions for the protection of future generations from the effects of ionizing radiation and radioactive substances" — commented Vitaliy Petruk, chairman of the State Agency for the Exclusion Zone Management.

According to him, the updated National Programme will create legal grounds for further development and possibilities to fulfill the following key activities by 2020:

An important milestone in ISF-2 project implementation occurred on June 16, 2017. The comprehensive tests of technological systems equipment, namely, compressed air preparation and delivery system, have been started at the Storage facility construction site. This is the most important stage in construction of new Spent Nuclear Fuel Storage Facility.

Comprehensive testing of the equipment started after successful completion of installation and individual acceptance tests of equipment. All works are performed according to the approved Test programs and without the schedule delays.

According to the information of the Radiation Safety Shop Shift Supervisor, on June 13, 2017, at 02.55 p.m. havy smoke was found in the premises 513/1, 509/1 at the elevation 19.5 of Unit 3. It was eliminated with involvement of the Fire-fighting crew No. 2 of SSE ChNPP. This incident didn’t have a negative impact on the radiation situation in Unit 3 premises and at Chernobyl NPP site.
 
At the moment the reason of the smoke occurrence is preliminarily established: smoking of unidentified person in an unauthorized place. An official investigation is under way. Additional checks were initiated to ensure compliance with fire prevention regime in Chernobyl NPP premises.

At the moment there are no nuclear fuel at Unit 3, there is no technological equipment in the premise of smoke occurrence.

A regular mission of the IAEA began at the Chornobyl NPP to review the issues related to technical solution of irradiated graphite management including selected options for containers and storage. Today, on the first day of work, international experts visited the ChNPP industrial site.

During the morning session, experts were provided with information on the current status of decommissioning as well as with the draft technical solutions developed by the Chornobyl NPP specialists on irradiated graphite management.

The experts also visited the restricted access area, in particular the Unit 2 central hall and Lot 0 Building located at the plant industrial site, the NSC observation pavilion and the town of Prypyat.

Within the next two days of the mission, experts and specialists of the Chornobyl NPP will review the experience of Germany and the United Kingdom in the area of irradiated graphite storage as well as the international project “GRAPA” related to an analogous subject, and provide preliminary recommendations on the technical solutions proposed by the ChNPP on irradiated graphite management, including the selection of options for containers and storage.