geostemnien
maSS SESE
EOREMIATION
+.
eet
shot fall-out cas ao
3:“
include dases ~
from Dog anv E+
‘sii Guts. The large doses
to‘be @..2eh 05 cesen iru vie fall-out having
-
occurred af cvch » Inc ume. (See, however,
paragraph of Sec. 25.)
External Radiation Doses to 28 May 1951
An anaiysis of all radiation exposures as
shown by photographic film badges was made
as of 28 May 1951, the day before the departure
of TU 3.1.5 staff from Eniwetok Atoll. The exposure data presented represent only that obtained in various missions concerned with the
test program and do not include doses obtained
from Dog, Easy, and Item fall-outs.
Film badge data from 3,335 individuals show
an average exposure of 510 mr. Excluding 913
persons with exposures of 100 mr orless, the
average was 710 mr. The distribution of doses
received is shown in Fig. 2.13.
2.8
SUPPLY AND EQUIPMENT
In general, there were remarkably few supply
and equipment problems for TU 3.1.5 during
Operation Greenhouse. The only two items of
equipment with which difficulty was experienced, the AN/PDR-T1B Radiac training sets
and Mine Safety Appliance Co. dust collectors,
have been discussed in Sec. 2.1.
Major items of equipment are listed in Appen-
dix E. For a certain few of these items which
might not be considered necessaryfor future
tests, see the discussion of instrumentation in
Sec. 2.9.7.
The original request by CTU 3.1.5 for 2,000
units of protective clothing was filled in adequate time. It was later necessary to order an
additional 1,000 units, and these, too, were received in adequate time.
All survey meters were received in time ex-
cept the AN/PDR-T1B’s. Instruments were received without batteries; but batteries were
drawn from general stock, and the instruments
were completed and ready for calibration on
time. Particular attention should be paid to the
battery problem in future operations since some
of the required batteries are not of common
vintage.
Radiation counting laboratory equipment and
photodosimetry equipment were complete and
ready for operation upon arrival of TU 3.1.5.
.
wegenfe cometat
rt
as eadTOa
napaareangeenine meeck
wa
——!
eee
---~ wert:éceived on schedule. However, upor. calibration it was found that the film packs leaked
the parenthetical note in the next to the last
2.7.6
ware mee
- va“The 15,000photographic film bauges requested
light around the perforations which formed the
identifying numbers of the badges. This was
overcome by wrapping the film badges in black
photographic masking tape. Shortages of this
tape, of which large quantities were required,
necessitated special air shipment from the
United States of additional supplies. For future
operations, film packs should be carefully
checked for light leakage at the point of manu-
facture.
Instrument repair tools were adequate after
certain additional small tools were drawn from
the AEC supply. For power tools considered
desirable for future test operations see Sec, 2.9.
Requests for expendable supplies were filled
on time and in adequate quantities except for
certain batteries which were, from time to
time, in short supply. Had radiation detection
instruments arrived with batteries as originally
requested, this situation would not have arisen.
Supply facilities in the Forward Area were
adequate. Radiological safety personnel were able
to fabricate certain items for which need always
arises and for which the requirement cannot be
foreseen. Such items, therefore, are seldom in
stock.
In general, the materiel and supplies re-
quested before the operation were adequate,
with little oversupply and no known deficiencies.
2.9
INSTRUMENT OPERATION, REPAIR,
AND MAINTENANCE
This section concerns the operation, repair,
and maintenance of radiation detection instruments of the field survey type as well as
some special modifications found desirable and
useful. Some suggestions are included which
may be helpful in future operations. Information was obtained through maintenance and repair work on all instruments used by TU 3.1.5,
both of the field survey and laboratory type as
well as field survey instruments used by other
units. Repair and maintenance was conducted
in a dehumidified room, in the radiological
safety building, which was quite satisfactory.
However, instruments were stored in a stock
room having atmospheric conditions closely