ay
252 and Jranse stations TE and Liss sere survicicathy active to sield sx
data.
Those froa Teak Stations 35 ami 56, with the excepticn of sclrur trsa
Station 52, bad cecayed to near Sacaground levels.
Thersai seutroa Jaca vere
obtained froa gold and cobalt saaples which were flwa to saaiia for evaluation.
Telemetered records showed that 31] neutron detectors Fusctiooed aechanically fi.e., the sample wheel was turning) catil impact.
There was an elec-
trical salfuaction on Station 20 during the entire tine of ‘fall; also, Statioa
GO data were Tost because its transmitter went off the air at % seconds after
launch.
Station €52 operated properly until 175 seconds after burst at which
tine there was an electrical malfuncticn.
The background was still sufficiently
high to sask foil activity duriag the tine Station 252 was functioning.
other detectors functioned until impact.
All
Background count aaskea sulfur data
on the Teak stations aod all data on the three Orange stations.
Teleaecered
data were obtained from fission foils at Teak Stations 38, 59, aol 209.
For
reasons given in Section 3.2.4, the uncertainty in values given in telemtered
data is act least a factor of 3.
3.2.4
Conclusions and Recoomcodations
Background caused oore difficulty than was anticipared in the evaiusliuu
of telemetered data.
There is ewidence that an appreciable portion of this
interference activity cam from aaterials outside the detector itself.
When instruments at Godiva LI were calibrated, access to che exposed
detectors was not allowed until approximately 2O minutes after burst because
of radiation hazard in the vicinity of che machine.
cones ispacted i2ss than 20 minutes after burst,
late the calibration curves backeard in time.
Since all instrument nose
it was necessary to extrapo-
As a result of different induced
background activities at calibration aod in the actual event, the slopes of the
observed decay curves differed in the two cases.
The flux as read from the
data would, therefore, depend upon the tire at sbich it was read out.
This
caused the uncertainty cited in Section 3.2.3 The mucbers given io Table 3.1
represent the average of telemecered data read out at 200 seconds and 1000
seconds after burst.
Because of the high probability of recovery or instrmece pacaages firua
the ocean,
laboratory counting of recovered activation samples is probabl; the
sicplest acd certainly the most accurate technique for ceasuzsemeat of neutron
ay
102