Chapter 5: Using the Protector Radioisotope
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Original instructions
Operating the Washdown Control Valve
Your Protector Radioisotope Fume Hood has a washdown control valve located on
the upper left-hand side that controls water to the washdown spray nozzles. The
nozzles are located behind the hood baffle and will washdown areas in the hood,
which are unaccessible without removing the baffle. The washdown control
system can also be set up to control the washdown rings used in your exhaust
ductwork. This is done by connecting the water line to the plugged connection on
top of the washdown hood system or ordering additional washdown valves found
in Chapter 2 and Chapter 7.
Working in Your Protector Radioisotope
Fume Hood
Planning
Thoroughly understand procedures and equipment required before
beginning work.
Arrange for minimal disruptions, such as room traffic or entry into the
room while the hood is in use.
Start-up
Turn on light and hood blower.
Slowly raise the sash.
Check the baffle air slots for obstructions.
Allow the hood to operate unobstructed for 5 minutes.
Wear a long sleeved lab coat and rubber gloves. Use protective eyewear.
Wear a protective mask if appropriate.
Loading Materials and Equipment
Only load the materials required for the procedure. Do not overload the
hood.
High-level radioisotope materials (gamma particles) are not recommended
for use in this Radioisotope Hood. Only use low-level alpha, lower level
beta radioactive particles, and gaseous radioisotopes. Consult your Safety
Officer should you have any questions.
Do not obstruct the front air foil, or rear baffle slots.
Large objects should not be placed close together and spaced above the
liner bottom to permit airflow to sweep under the equipment.
After loading the hood, wait one minute to purge airborne contaminants
from the work area.
Work Techniques
Keep all materials at least 6 inches inside of the sash, and perform all
contaminated operations as far to the rear of the work area as possible.
Segregate all clean and contaminated materials in the work area.
Avoid using techniques or procedures that disrupt the airflow patterns of
the hood.
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