Liberia went closest to breaking the deadlock through Dulee Johnson, whose powerful shot hit the crossbar before being safely collected by the Zambian goalkeeper.
"We are considering the proposed voluntary amendment as the best path to get Unit 2 safely up and running before the hottest months of the year hit our region, " SCE President Ron Litzinger said in a statement.
The Rays' advantage grew to 3-1 when Joyce slid home safely under catcher Austin Romine's tag attempt after Yunel Escobar hit a grounder to shortstop Jayson Nix.
Eoin Morgan began his innings with a reverse sweep for four and Collingwood strode down the pitch to hit another massive six off Morkel, before top-edging a skier that Boucher accepted safely.