=!) were compared as a function of cylinder thickness ani time, Combined absorption ani multiple scattering coefficients for steel were cal-~ culated from the attenuation data and are presented in Fig. 2.71-2. The low radiation levels aboard the two YAGs prevented calculations for later times than those shown. The values obtained from the two YAGs agreed well. It will require a statistical analysis to determine whether the values are Significantly different from those obtained at Operation CASTLE. No conelusion ean be drawn at thi Participatisn in the data and did not permit adequate satisfaction of project objectives, ~ 33 =