underground test, RAINIER, is in progress. These effects studies are of interest to the PLOWSHARE Project. continuing on the fireball chemistry project, Studies are the study of ways and meéns of reducing the accessibility of radio strontium in fallout to the biosphere and in particular to the human body. Further experiments are planned in Operation HARDTACK. 15. Two one-point safety tests were conducted at Nevada Test Site during December. The test devices were the ae yo The tests provided information on safety features which will be incorporated in the design of these devices, which are to be tested in Operation HARDTACK, 16. Approximately ten safety tests are planned at Nevada Test Site in the spring and fall of 1958, as required. 17. Consideration is being given to conducting a series of low yield nuclear tests underground in the fall of 1958 at Nevad: Test Site in order to reduce the total nurter of tests in Operation HARDTACK and tr over-all costs. would be known as Operation MILLRACE, 18. This operation DOE APC™NIVrS Weal? Planning continued on Operation HARDTACK, April 1958 at Eniwetok Proving Ground. to begin in A firm schedule of tests will be provided the Joint Committee as soon as it is available. a WEAPONS FACILITIES 19. Construction on the expansion cf weapons facilities proceeded satisfactorily. The status of construction at the end Ne of December is shewn below: -~il- Part III