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Radiographers must verify the automatic securing of the source assembly by attempting to EXPOSE the
control crank. If the source assembly is not secured, repeat step number 5. Treat the situation as an
emergency if the source assembly does not secure automatically.
6)
If any operational issues are found during this check, the deficiencies must be corrected prior to using the
system for production radiography.
F.
Disassembly of the system after use - crank-out remote controls
1)
Survey the external surfaces of the device to assure that the radiation levels do not exceed 2 mSv/hr (200
mR/hr).
2)
Remove the remote controls the exposure device lock mechanism. Rotate the selector ring of the lock
mechanism of the device from the “operate” position to the “connect” position. This will release the safety
plug collar assembly from the lock mechanism.
3)
Depress the sleeve of the female source assembly connector and disengage the drive cable connector.
4)
Place the protective cap onto the locking mechanism, and rotate the selector ring from the “connect” position
to the “lock” position. Engage the plunger lock and remove the key.
Figure 27 – 989 with Protective Cover
Removed
Figure 28 – 989 with Protective Cover
Installed and Plunger Lock Engaged
5)
Perform a radiation survey on the Model 989 exposure device at the surface to ensure the measurable dose
rate is no greater than 2 mSv/hr (200 mR/hr). Secure the exposure device into the reusable transport and
storage case. If transporting, perform a radiation survey on the surface of the locked transport case to
ensure the measurable dose rate is no greater than 2 mSv/hr (200 mR/hr). Perform a survey at one meter
from the external surfaces of the transport case device to assure that the radiation levels do not exceed 100
µSv/hr (10 mR/hr).
Summary of Contents for 989
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