0.25 to 6.0inches, chambers. Fach detector consisted of 3 packaged ionization The pipes with detectors and an unshielded detector were enclosed in a thin aluminum dome so that the geometry of radiation sources would be identical. A field test was to be made of a prototype detector-recording aystem as a part of the laboratory's long range development. Miscellaneous gamma radiation measurements were to be made by means of unshielded recording radiation detectors located on the kingpost sampling platform, in the bridge, in the fireroom, in the recorder room, and in Number 2 hold. RESULTS No data were obtained because the YAG's were not contaminated, corenisce 7 LAL RE 4