KIEV, May 19 - The European Bank for Reconstruction and Development on Monday agreed to donate 135 million euros to Ukraine to support efforts to clean up the site of Chernobyl nuclear power plant.

The money will pay for the construction of the New Safe Confinement, a structure that will be built over Chernobyl’s reactor 4, which was damaged by an explosion in 1986.

The confinement, the largest such project in the history of engineering, will cover the present shelter which has been built shortly after the accident, and which has been deteriorating.