(Bloomberg) -- Donald Trump's plans for a nuclear deal with Saudi Arabia are bringing tensions between US and South Korean reactor developers to the fore, surfacing details of a clash over market access that has garnered interest from regulators. The settlement gave KEPCO and KHNP rights to use Westinghouse technology for South Korean reactor designs in territories spanning four continents and including Saudi Arabia, according to a copy of the settlement seen by Bloomberg. Some of those details emerged in correspondence seen by Bloomberg between KEPCO and Westinghouse, even before the US and Saudi Arabia announced a long-sought nuclear technology-sharing deal on Wednesday. Trump's Saudi deal doesn't name Westinghouse, but it could benefit US nuclear companies. But whereas Trump's Saudi agreement created business potential for Westinghouse, KEPCO saw a clear violation of the settlement agreement that delineates the kingdom as a territory for the South Korean firms.