** Shares of Sam Altman-backed nuclear technology firm Oklo OKLO.N fall 1.87% to $93.55 premarket
** Co signs deal with U.S. Department of Energy to design, build and operate a radioisotope pilot plant under the Reactor Pilot Program
** OKLO says it will use the pilot facility to prepare for future U.S. plants producing medical and research radioisotopes
** OKLO up 266% over the past year
(Reporting by Varun Sahay in Bengaluru)
((Varun.sahay@thomsonreuters.com))