STE #2

Question 1

If you are entering an area of unknown dose rates you should set you instrument:

Answer 1

Highest scale for the expected dose rates

Question 2

If you are surveying a drum and you find a spot reading 140 mrem/hr on contact you should also

Answer 2

Take a 30 cm reading

Question 3

If you are doing a survey and you find a dose rate of 100 mrem/hr just above the knee what action should you take.

Answer 3

Perform a gradient dose rate survey

Question 4

Which of the following instruments is most commonly used for obtaining general area radiation dose rates

Answer 4

Ion chamber

Question 5

While performing a survey on a floor drain you obtain the following data; open window 22 mrem/hr, closed window, 6 mrem/hr. The instrument has a beta
factor of 4. What is the contact beta dose rate?

Answer 5

64 mrad/hr

Question 6

When documenting a gradient dose rate survey you should include the dose rates at the head, chest, waist and knee level. True or False?

Answer 6

True

Question 7

Which of the following should be considered as a potential source of radiation

Answer 7

1. Pipes,
2. Elbows,
   and 3. Bottom of tanks

Question 8

To measure the effectiveness of dosimetry, dose rates should always be obtained and documented. True or False?

Answer 8

At chest level

Question 9

A closed window reading on a ion chamber is only measuring beta dose rates. True or False?

Answer 9

False

Question 10

When should beta dose rates be taken

Answer 10

1. On surfaces with contamination levels >500,000 dpm/100 cm^2,
2. On open reactor coolant system,
   and 3. Entry into the refueling canal

Question 11

When is a survey required to be performed in the overhead?

Answer 11

When access is required above 7 feet and access is provided by ladders

Question 12

Gaps in shielding could cause a high radiation field and should always be surveyed. True or False?

Answer 12

True

Question 13

The background limit for being able to perform a free release survey is…

Answer 13

200 cpm

Question 14

To perform a direct frisk for alpha contamination, which of the following instruments would be the best to select…

Answer 14

Zinc sulfide

Question 15

When performing a direct frisk survey with a pancake GM detector the probe should be moved no more than

Answer 15

1-2 inches per second

Question 16

If using a GM frisker and the meter is indicating greater than 50,000 ncpm, the technician should survey for the potential

Answer 16

Discrete particles

Question 17

When performing a direct frisk with an alpha survey instrument the probe to surface distance should be ______________.

Answer 17

¼ inch away

Question 18

The background count rate for using an alpha survey meter to perform a direct frisk of items for free release cannot exceed ___________cpm

Answer 18

1

Question 19

While performing a survey of a Large Area Smear (LAS) you see a rapid drop in the count rate as the probe is slowly moved by one inch. This could be an
indication you have found ______________.

Answer 19

Discrete Radioactive Particle (DRP)

Question 20

When performing a smear survey with a disc smear the surface area surveyed should be which of the following?

Answer 20

100 cm 2

Question 21

When surveying a discrete particle with an ion chamber and you obtain an OW/CW ration of less than 10, indicates the particle is which of the following.

Answer 21

Fuel Fragment

Question 22

Wet or oily smears can result in significant self-absorption of when counting smears for alpha contamination. True or False?

Answer 22

True

Question 23

You have performed a survey in an area posted as an Alpha Level 3. What percentage of smears should be counted for alpha contamination?

Answer 23

At least 50%

Question 24

You have counted a contamination smear survey and the beta-gamma to alpha ratio is 1800/1. This indicates the area is which of the following

Answer 24

Alpha Level 2

Question 25

An area where 90% of the exposure an individual receives can come from internal exposure is which of the following?

Answer 25

Alpha Level 3

Question 26

When is alpha frisking required for personnel monitoring?

Answer 26

When the βγ/α Ratio is less than or equal to 50 and the total transuranic alpha is greater than or equal to 20 dpm/100 cm^2

Question 27

You should immediately notify RP Supervision when which of the following occurs?

Answer 27

1. Changes in radiological conditions that require changes in postings,
2. Changes in radiation conditions that require changes in RWP controls,
   and 3. Discovery of radioactive material outside the RCA

Question 28

The proper way to document on a radiation survey the location of neutron dose rate of 50 mrem/hr would be 50 N at the location where the dose rate was taken. True or False?

Answer 28

True