Chapter 4
LEGAL DOSIMETRY
4.1
Dosimetry Devices
Experience during Operation Castle in 1954 indicated that there was
definite need for providing legal dosimetry services to all personnel in Joint
Task Force SEVEN. Accordingly, the film-badge program for Operation Redwing was designed to provide adequate dosage information on every man en-
tering the Pacific Proving Grounds.
A so-called permanent badge was issued
to everyone in the Task Force for wear at all ‘.mes. In addition, a "missfon’
badge was issued to those persons who were required to enter contarunated
areas, Dosimetry records were then kept on both types of badges for cach
{ndividual. Pocket dosimeters, Bendix model 611, 0 to 5 r range, were also
used with the mission badges as a means of obtaining quick information aa
to dosage received by :.n individual while in a contaminated area.
4.1.1—The permanent-badge program was designed to provide a dosage-~
indicating device to all personnel in the Task Force. Issue of the first permanent badges was made on 15 Apri) 1956, with exchange scheduled each
six weeks. Ags the operation progressed, It was found that badges worm in
excess of four weeks were badly watermarked, showed evidence of severe
light leaks, and were generally quite difficult to read.
As a result, the ex-
change period for TG 7.1 and TG 7,5 was shortened to three weeks and the
period for all others was shortened to four.
During the operation 40,000
permanent badges were {ssued, processed, and recorded,
tained on approximately 15,000 individuals.
Records were main-
4.1.2—The mission-badge program was designed to provide a rapid de-
terminiation of the dosage an tnd{vidual had recelved while participating in
recovery or construction raissions in radex areas.
Only pereons entoring a
radex area were provided with mission badges. No deficiencies were noted
with these badg2s, os the usual period of wear was approximatcly 12 br.
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Approximately 45,000 mission badges were processed.
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