gen 3-6 L.SL's concept of its H-RDT..CK experimental program was thet yield measurements would be required on 2ll devices, and time interval on all two stage devices. Alpha measurements would probably be required on all larce <> devices, and possibly on all devices, oo gr ww Cnly the two surface shots would be heavily instrumented. Although the above listing did not include an official LASL list of shots, and although shots might be cancel~ led, added, or substituted, the magnitude of effort involved and the total number of events required by the Laboratory should not change appreciably. UCRL wes planning very simple diczgnostics, to be measured et 2 distance on the six low-yield devices. DELETED They were mainly interested in yield, alpha, —w Se ning to measure time interval. On the lzrge twoestage devices UCRL was plane They; might include photo pipes on some.of the barge shots, but were presently planning on only one heavily instrumented shot. (It was later decided to not fire a heavily instrumented shot in the "H:ARDTACK" operation). Concept Of Operat ions: 1. Lencth of operational period should be minimized. 2. Dual capability for large shots was required. 3. iftual interaction between agencies should be minimized. 4. Joint use of firing sites by different agencies should be eliminated. 5. Capability for operation if Taongi is not mede available should be provided, if possible. 6. Any proposed shot can be done on Bikini, 7. Eniwetok shots should be limited to 5 iit meximun. The above principles were agreed upon as being a desirable basis for planning, and rethto the following tentative concept. 2,+Oy og “hee Yi UCRL would plan to do the four lerge shots on Taongi, and the remainder cd a PAGE #7