ORIPOTIVE AND INSTRUM™NTATION Objectives, instrumentation, ani techniques are as stated in the Project Detail in section 2 of the Program 2 Consolidated Book. GENERAL . The radiation levele on the YAG-40 were too low to supply data adequate for the satisfaction of project objectives. The ratiation levels on the YA9-39 were high enough to yield uscful data: however, the rains encountered by the YAG-39 caused some apparent anomalies in the data and my rrevent the satisfaction of some te projest ob ectives, The instrumentation performed satiefactorily with one or two exceptions. RUSULTS Interaction of Gomme Radiation with Steel _ Gamma radiation fields inside steel cylinders of various thicknesses were compared as a function of cylinder thickness anil time. The results appeared to be anomalous and will require further stuiy to Jetermine their validity, thore7ore the combined absorption and mil- tiple scattering coefficients will not be presented or used at this time. Relative Gamma Ratiation Ficlie Contribute? tr Various Retiation Sources Figures 2.71-1 and 2.71-2 show the gamma dose andi dose rates contributed by contaminants both in the air ani on the weather surfaces of YAS~39. Figures 2.71-3 an? 2.71-4 show the gamma dose rates in several prep DOE COMES~TCE pr Ro aL RE - 3 32 - y,