An experiment is described in which a saturated sodium pool was boiled from the surface of a horizontal 3/8-in-dia cylindrical test section. Measurements of surface temperature and heat flux during nucleate boiling were made at pool temperatures between 1200 and 1500 deg F and at heat fluxes up to 800,000 Btu/hr-ft2. Burnout heat flux measurements were made at pool pressures between 0.5 and 1.5 psia. Empirical correlation of the nucleate boiling data showed heat-transfer coefficients somewhat higher than previous prediction. A new nondimensional burnout correlation is derived which brings the sodium measurements into agreement with published burnout values for water and various organic liquids.