INFORMATION ON THE STATUS OF MITIGATION OF DAMAGE TO THE OUTER AND INNER CLADDING OF THE NEW SAFE CONFINEMENT (NSC) ARCH AS A RESULT OF A DIRECT HIT OF A RUSSIAN UAV INTO THE NSC SHELL AS OF 16:00 ON 17 FEBRUARY 2025.

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1. Firefighting Status

Efforts continue to mitigate the consequences of the fire, contain, and extinguish isolated smouldering areas of the insulation material, involving specialized SESU response teams. A total of 17 units of equipment and 93 SESU personnel have been deployed to the site.

2. Technical Condition of the Object Shelter (OS) and New Safe Confinement (NSC-OS)

Due to damage to the external and internal cladding of the NSC Arch and Main Crane System equipment, the safety boundaries and operational conditions of the NSC-SF Complex have been compromised.
According to the results of an emergency inspection of the NSC Arch’s enclosing and load-bearing structures, as well as the maintenance garage of the main crane system, damage to the Arch’s external cladding and certain technological equipment has been identified.

3. Radiation Status

  • of the NSC-Object Shelter local site and ChNPP site
Location of the monitoring station EDR (μSv/h) Ref. level (μSv/h) Activity concentration of α-aerosols (Bq/m3) Ref. level (Bq/m3) Activity concentration of β-aerosols (Bq/m3) Ref. level (Bq/m3)
NSC-OS site (north-west) 3.97 40.0 0.001 0.1 1.000 10.0
NSC-OS site (north-east) 6.5 40.0 0.001 0.1 1.000 10.0
NSC-OS site (south-west) 9.53 40.0 0.001 0.1 1.000 10.0
NSC-OS site (south-east) 11.8 40.0 0.001 0.1 1.000 10.0
ChNPP Administrative Building-1 0.24 7.5 --- --- --- ---
Outdoor Switchyard∙750 1.54 15.0 --- --- --- ---
Checkpoint-2 0.9 7.5 --- --- --- ---
ISF-2 0.16 2.0 0.01 0.2 1.000 10.0

No deterioration of the radiation situation at the NSC-OS site or at the ChNPP site as a whole has been recorded. No release of radioactive substances beyond the established limits has been detected.