~16felt that P & W's engine development had not gone far enough that one could judge the whole. Dr. Hafstad remarked that P & W could move fast if they had the pertinent information on the reactor, but he doubted that enough new information would become available to make & review in six months. Mr. Whitman commented on the lack of integration between the two teams (reactor and engine) at Oak Ridge, less than at Lockland, It seemed to have developed Dr, Hafstad said that the apparent lack of enthusiasm on the part of Pratt & Whitney was real, They had entered joint operation with Oak Ridge at the insistence of the AEC, and regarded the arrangement as a shot-gun marriage, against their own preference, There were several comments on the heterogeneous, sodium cooled ESEESSEOFConcept (NDA proposal). Mr. Murphree,’in particular, was worried that this approach was being neglected, Dr. Hafstad said it would be hard to defend three parallel approaches, and indicated he felt that undertaking this approach should be deferred until it was possible to decide against one of the other two. He felt that a choice between the direct cycle and the sodium cooled heterogeneous reactors might be made (with the aid of the GAC) by next summer after more information was developed on the direct cycle reactor. Dr. Wigner observed that one would never want to throw out the direct cycle approach; and, in reference to the idea of waiting to see before