Returning to Pearl Harbor for a refit, the destroyer conducted a series of local training operations off Hawaii in July and August following the completion of those repairs and alterations. Then, in September, she departed for Eniwetok Atoll to participate in two atmospheric thermonuclear tests in Operation Ivy. During those evolutions, "Carpenter" conducted ASW patrols to keep Soviet submarines from observing the tests in between her duties as plane guard for the carrier , whose planes flew patrol and reconnaissance missions in the region. With both detonations complete by 16 November, "Carpenter" received her radiological clearance inspection and departed the next day, arriving at Pearl Harbor on 24 November.