Yao, L. S, Thermal instability of a volumetrically heated pool with phase change and a free upper surface / Lun-Shin Yao and Ivan Catton - v, 19 pages ; 28 cm. - The Rand paper series; P-6069 . - The Rand paper series; P-6069 . Includes bibliographical references (page 10) Subjects--Topical Terms: Nuclear reactors--Fluid dynamics