However, a group of film lad,a readings was obtained covering a range of values which vaiied with exposure conditions (Reference 3), These readings are suinarized in Tatle 2,3, th outdoors and indoors. Several badges were worn Oue badge which remained outdoors over the 28.S5-hour exposure reached tha upper limit of 93 r given in the table. eS oa Several other uauges kept inside a refrigerator indcors gave the lowest value of 33 r. Skin contamination in the Hongerik group appeared to have been much reduced by the protective measures taken and the resulting beta doses appeared clinically to hava teen clearly lower than in 2 ey iy Fe ee the other groups, TABLE 2.3 = Pile Badge Readings on Hongerik a oo During the period 3 to ll March, mre extended surveys of each of the islands were made by a monitor! e team equipped with five AN/PDR=39 Twenty-four hours previous to the departures of the su rvey party, three of the instruments were calibrated on an 8O~curie Co source and cross checked at 0.320 r/hr, where they were found to be in close agreement, Using these instruments, measurements were made in the inhabited areas of all four islands at waist height (approximately 3 feet above ground), Table 2.4 1s a summary of these data, Since these later readings were made under better controlled conditions than the emergency surveys at the times of evacuation given in Table 2,2, the data of Table 2.), vere taken to be the best measure- ment at a given tine of the gamma dose rates in air and were used in the calculation of the total external canna dose. No information existed on the qusntity of beta contamination on the skin of any of the exposed individuals, Further, no experimental data allowed any reliable calculation of the beta dose rate to an individual fran fission products on the greund, Thus the only basis for any estinate of external Leta dosage was data from other field teats and fallout measurenents, This question is discussed further in Chapter 6, and a rough estinata for possible beta dose from ths ground . is made there, * a tae . Ls yt feo Ce Ba LATER SUHVEXS instruments (Referanea hh), fe fe, oO 2 oa Inside RefriperatorIndoors 2.3 d ohay See eg leek. : TR Leaky ie Se gah: Outdoors only hh to 52 at oy Indoors and Out “Oo ca ed ad Location of Badges Pee | Calculated Dose to Badges (r) 4 ee ee eee+ °