scheduled to be held at Eniwetok in the spring of 1952, has been Recent inforpostponed until the winter of 1952-53 by the AKC. mation from the AEC indteates the probability that another development test may be held, at the Nevada. Test Site, at about the same time as IVY. 4. The Federal Civil Defense Administraticn has proposed that an effects test us ye an atomic weapoen of approximately to determine the effects on civil deC-KT yield be conducted Ponse structures and material, and for indoctrination and publicity The DOD, has been in connection with the civil defense program. invited to participate in and assist with the support of the test. The JCS, in July 1951, considered that, from a purely military point of view, the expenditure cof fissionable material for the expressed purposes of this test would not be Justifiable, but that if the test is approved, the DOD should consider nominal support, if requested, and stated that the degree of participation and material support for the test should be held to the absolute minimum. The AEC has agreed that, If the test is ap- proved, the AEC will provide the atomic bomb and certain speci- At this time, it appears improbable that the fied support. The AFSWP is FCDA test will be conducted in the near future. of the opinion that participation by the military, in the status of guests and in a suburdinate supporting position, ina test conducted by and primarily for the FCDA would be undesirable at best; but that, if the need for a military weapons effects test is established, the FCDA might be invited to participate to an extent limited to tests of civil defense structures and materials under conditionsStipulated by the DOD. 5. The AFSWP has received the effects programs proposed by the three services for accomplishment in conjunction with the development test to be conducted in the spring of 1952, SNAPPER. Some programs are incompatible with a development test and several will be difficult to integrate into the test because of time, space and other considerations. It is recognized that by their very nature, weapons deve Ropmen’ tests eannot be planned. far in advance whereas some weapons cffeets tests must be. Development tests, by reason of their laboratory nature, are not susceptible to early knowledge of the magnitude of yield of the various shots, sequence of shots, type of detonation (tower or air drop), or areas relative to ground.zero which will be available to the military participants for construction of test structures, instrumentation, and exposure of material. Between the two types of tests there is an inherent conflict involving mutual interference, divergenee of interests, competition for local facilities and labor, complexity of control or command, difficulty of accscunting and general incompatibility. 6. Certain types of effects projects, in which the military have a great intcrest, are of such a nature that they ean be included in an AEC development test either wholly or to a limited extent. Effects projects in this category which should continue to be ineluded in development tests are those which involve no large outlay of equipment, extensive construction or procurement of instruments, and which will not severely interfere with the development test program. Tnese will be generally ' limited ta research projects, checking of test procedures for future effects tests, tests of atomic warfare operations which require continual yield. evaluation or tests not sensitive to weapon

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