As part of the Heavy Water Reactor Program Office effort to define the "state-of-the-art" in heavy water moderated reactors a survey of reactor designs and design studies was undertaken. This survey includes: 1. A list and descriptions of the heavy water moderated power reactors either operating or under construction; 2. A list and description of the more recent design studies done no heavy water moderated reactors, with the exception of reactors using organic coolant; 3. A discussion of the various reactor types, as determined by type of coolant, indicating development trends; 4. A discussion of various design features or characteristics that many heavy water reactors have in common, such as pressure tubes, on-line refueling, and D2O loss rates.

This report is one of an annual series and announces formal research and development reports and technical articles published during 1968 by Battelle-Northwest. The reports were issued in accordance with the AEC Standard Distribution Lists for Scientific and Technical Reports (AEC Documents TID-4500 and M-3679). The unclassified reports are generally available from the Clearinghouse for Federal Scientific and Technical Information, U.S. Department of Commerce, Springfield, Virginia 22151. Classified reports are available, with proper literature access, from the AEC's Division of Technical Information Extension (DTIE), P.O. Box 62, Oak Ridge Tennessee 37830. The reports and articles are grouped by broad subject categories and arranged alphabetically by author within each category. An author index and report number index are also included. Other reports in this series are BNWL-218, BNWL-387, and BNWL-700.