Film Badge Readings are as follows:
CN 401

40r

CN 416

40 ¢

CN 403

40r

CN 417

40r

CN 404

40r

CN 419

520

CN 408

40r

Unknown

40r

CN 410

44r

CN 414

93 r

CN 411

40r

CN 423

98r

CN 415

40r

CN 425

98 Fr

Film badges presently in custody of TU 7, TG 7.1 until completion

of operation, at which time they will be forwarded to AFSWP.
This dispatch reportedly (Reference 3) contains the distribution list for the badges as
originally planned; however, because only six of the badges were actually distributed,
and only four were actually worn, many of the 40 R readings attributed to personnel

may have actually been from the film badges that were placed in the refrigerator.
One individual with whom a badge reading is associated was not stationed on Rongerik
during the period 1-2 March 1954.

Reference 10 states that: "Several badges worn both outdoors and inside buildings on the island read 50-65 r, and one badge which remained outdoors over the 28.5
hr period read 98 r. Another group kept indoors inside a refrigerator read 38 r." The

inference is that the troops received a film badge dose ranging from 50-65 R, while
the badges in the refrigerator and the one that remained outside provide a lower and
upper bound dose, respectively.
Reference 5, which cites a Hq JTF-7 Memo for Record

"Rad Safe Narrative

Sequence of Events", BRAVO Shot, Operation CASTLE, as a reference, states that

"film badge readings were obtained covering a range of values which varied with
exposure conditions. Several badges were worn both outdoors and indoors (and covered
the range 44-52 r).

One badge which remained outdoors over the 28.5 hour exposure

reached the upper limit of 98 r.

Several other badges kept inside a refrigerator

13

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