The South Korean flag flies over Cheong Wa Dae in Seoul. Photo by Asia Today

June 5 (Asia Today) -- South Korea's presidential office said Friday there has been no major change in the plan to build nuclear-powered submarines in South Korea as Seoul and Washington resume talks on nuclear cooperation and wartime operational control.

A senior Cheong Wa Dae official told reporters that recent security talks between South Korea and the United States were "very productive and useful."

"There has been no major change in the position that nuclear-powered submarines will be built in South Korea," the official said.

The official said the two sides discussed uranium enrichment, spent fuel reprocessing and nuclear-powered submarines. The talks also included what the official described as an "umbrella" consultation framework.