que (Mr. Glennan, consulted on the following day, advised of his concurrence in the above action.) 16, Production Accelerator Project The Commission resumed consideration of the MK, I linear accelerator project and of additional information received by letter from the California Research and Development Company (see Appendix **B’’ to subsequently circulated AEC 294/25), Mr. Derry pointed out that the estimated costs of cancellation of MK, I! procurement orders had increased and he commented on the estimated delay of approximately one month in the MK, I construction schedule and difficulties which might well occasion further delay to the extent that a final decision to proceed with construction of the MK, IT machine could not be made until April 1, 1952. In view of these changes and in consideration of the inherent unpredictabllity associated with construction and prove-out of the MK. I, the staff proposed to recommend that further work be limited to continuation of rescarch, development, design, and engineering on the MK. IJ and preliminary engincering work at the Weldon Spring site. Place-~ment of procurement orders for the MK, I and other than site engineering activity at Weldon Spring would, under this proposal, be deferred pending a clearer picture of developments in the MK. Il program. It was further proposed that a review of the progress of the MTA project at least every 30 days be made to enable the Commission to take advantage of any early results from experience with the MK, I and autherize MK. I procurement and further site work as appropriate. There was discussion of the revised MK, I construction and prove-out schedules; of the nature and extent of data which would call for initiation of MK. If procurernent and site activity at a later date and of the ultimate use to which the MK. II, if authorized, should be put. There was discussion also of the status of the MK, IZ project on which Mr. Derry said, in answer to questions by the Commissioners, the preliminary theoretical work being done at the Radiation Laboratory represented the total effort which could be made without interference to MK, land MK, If activities. After further discussion, the Commission: - 242 -