[Jeff Chandler]

Mainstream military commentators suggest the accuracy of UMPK-equipped glide bombs is poor but, with a claimed main destructive radius of 230 meters (750 feet) with lethal fragments out to over 1,200 meters (4,000 feet) , even a “near miss” by a FAB-3000 is difficult to defend against.

https://www.kyivpost.com/post/34668

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The FAB-3000 has a reported radius of continuous destruction of 230 meters (754 ft), with fragments retaining their lethal force at a distance of 1,240 meters (4068 ft), according to Russian military channels.

https://euromaidanpress.com/2024/06/21/russia-uses-first-time-a-massive-fab-3000-guided-bomb-in-kharkiv-oblast/#:~:text=The%20FAB%2D3000%20has%20a,according%20to%20Russian%20military%20channels.

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“This is an excellent result even for a guided munition,” Fighter Bomber wrote alongside the video, before claiming that fragments of the bomb “retain their destructive power at a range of 1,240 metres”.

https://uk.news.yahoo.com/russia-just-launched-deadly-3-154945548.html?guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAAM5Ato5WMFghumRG-Be-8-Dw48Zj-PlAk95JQRNAHtC3yK6-wIo2ZizZroo_9fXcuj4aENTLUsXEFf6CPEmSAzeIjor9udDKdRBb89WtrEeLqzKRhMPNJRHJWfptoO6u72RHJ_iGaqBnw1hP0zTUIylx9iqwGJo69nKhkK13CV69

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[Mariner]

” destructive radius of 230 meters (750 feet)”

That is the blast radius.