STE #8

Question 1

Only HEPA and vacuum units with a current _____________test can be used to control airborne radioactivity

Answer 1

DOP/PAO

Question 2

All HEPA and vacuum units used inside the RCA must be tagged as internally contaminated and cannot be opened without Radiation Protection oversight. True or False?

Answer 2

True

Question 3

Only those vacuum units labeled as ___________can be used to remove liquids

Answer 3

Wet vacuum or wet/dry vacuum

Question 4

If a vacuum unit has been used in an alpha level 2 it must be indicated as such on the radioactive tag. True or False?

Answer 4

False

Question 5

All HEPA and vacuum units shall be DOP/PAO tested every __________.

Answer 5

24 months

Question 6

HEPA units that require voltage greater than __________ requires maintenance support to connect the unit to the power source

Answer 6

120 V

Question 7

What is required to be installed on the suction end of the hose when the HEPA unit in being used to supporting grinding on contaminated pipe?

Answer 7

Spark arrestor

Question 8

When not in service the following actions should be taken with HEPA and Vacuum units.

Answer 8

1. Controlled in a manner that prevents their unauthorized removal and use.
2. Have all opening covered and taped to prevent the spread of contamination,
   and 3. Have an “out of service” tag installed if the unit is not working properly.

Question 9

HEPA units can be used as an engineering control to reduce the need for respiratory protection equipment. True or False?

Answer 9

True

Question 10

The potential for airborne activity being generated is evaluated using several factors including_________________.

Answer 10

1. Work method being used (grinding, welding, ect)
2. Available plant ventilation systems,
   and 3. Environmental conditions (wet/dry surface)

Question 11

______________ is the minimum air velocity required to overcome the motion of airborne particles or gases and accelerate them into the capturing airstream.

Answer 11

Capture velocity

Question 12

In cases where iodine is expected what should be included in the HEPA ventilation plan?

Answer 12

Add a charcoal filter unit to the system to remove the iodine

Question 13

It is important to implement contamination control measure prior to removal of the covers on the ends of the hoses to prevent the spread of contamination. True or False?

Answer 13

True

Question 14

Prior to turning on a HEPA unit you should verify the following:

Answer 14

1. The power cords are in good condition
2. There is no physical damage to the unit,
   and 3. The DOP/PAO test has been completed within 24 months

Question 15

When routing HEPA ventilation hose it is important to

Answer 15

1. Make straight runs and prevent bends to limit flow restrictions
2. Keep hose in the overhead as much as possible to prevent trip hazards,
   and 3. Make sure the suction of the hose is close enough to the area where the airborne is expected to be generated to maintain the proper capture velocity.

Question 16

A __________ should be completed to prevent potentially dangerous vapors and fumes from being transported from one area of the plant to another in situations where these exist.

Answer 16

Safety Evaluation

Question 17

The survey frequency for a HEPA unit should be based on the potential for changing radiological conditions. The survey frequency for a unit should be listed on ________.

Answer 17

Attachment 4

Question 18

What actions can be taken to validate that a HEPA unit is functioning correctly?

Answer 18

1. Install a continuous air monitor at the discharge of the unit.
2. Collect air samples at the discharge of the HEPA unit.
   and 3. Smear the discharge of the HEPA unit

Question 19

Radworkers are allowed to open HEPA or vacuum units if they stop running while in use? True or False?

Answer 19

False

Question 20

Before storing a HEPA or vacuum unit in the plant it is important to consider…

Answer 20

1. How easy it is to move the equipment from one location to another,
2. Fire loading,
   and 3. The potential for spread of contamination