0.0001 R/h were found at ground level outdoors and at waist level
inside a building, respectively. At the town of White, the highest
outdoor gamma reading was 0.008 R/h. Inside a building, the highest
reading was 0.0005 R/h (11).

Surveys taken in the canyon area one month after the detonation
indicated that gamma intensities at ground level had decreased to
0.032 R/h. The occupied ranch house was also surveyed, both inside
and outside. The highest reading outdoors was 0.028 R/h, and the
highest reading indoors was 0.004 R/h (11; 19).

Monitoring was also conducted in offsite areas other than those to the
north and northeast of ground zero. Monitors found no radiation
readings above background levels (11).

Significant fallout from the TRINITY cloud did not reach the ground
within about 20 kilometers northeast of ground zero. From this point,
the fallout pattern extended out 160 kilometers and was 48 kilometers
wide. Gamma intensities up to 15 R/h were measured in this region
several hours after the detonation. One month later, intensities had
declined to 0.032 R/h or less (11).



CHAPTER 4

DOSIMETRY ANALYSIS OF PARTICIPANTS IN PROJECT TRINITY


This chapter summarizes the radiation doses received by participants