This file image shows National Security Adviser Wi Sung-lac. (Yonhap) National Security Adviser Wi Sung-lac was set to meet with visiting US Under Secretary of State Allison Hooker on Tuesday, informed sources said, with the two likely to discuss Seoul's push to build nuclear-powered submarines.Wi and Hooker, under secretary of state for political affairs, will meet at Cheong Wa Dae at 2 p.m. to discuss a range of pending issues, likely including Seoul's push to secure greater authority to enrich uranium and reprocess spent nuclear fuel for its envisioned nuclear-powered submarines, according to the sources.The discussion could also delve into the allies' plan to transfer wartime operational control of South Korean troops from Washington to Seoul, they noted.Leading a US delegation, Hooker arrived in South Korea the previous day as the allies are set to begin follow-up negotiations on an agreement reached by President Lee Jae Myung and US President Donald Trump in October on Seoul's plan to build nuclear-powered submarines. (Yonhap)