End of Course Exams

EHS 440

Radiation Safety at Accelerators

EHS 450

Personal Radiation Monitoring

***for users of the 88-Inch Cyclotron***

This examination fulfills the requirements for credit for EH&S 405
(General Employee Radiation Training), EH&S 440 (Radiation Safety at
Accelerators) and EH&S 450 (Dosimetry). It is designed to be taken after
going through the accompanying presentation, *Radiation Safety at
Accelerators*. For work in Radiation Areas or in Radiological Materials
Area, additional training will be necessary. A score of 80% is required
to earn course credit.

Environment Health & Safety Division

Lawrence Berkeley National Laboratory

Name **\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_**Employee \#
**\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_**

Date Division **\_\_\_\_\_\_\_\_\_\_\_\_\_\_**

1\. Which of the following best describes the color combination of
radiation signs?

> a[.]{.underline} Controlled Area signs are blue lettering on white
> background; Radiation Area signs are black or magenta lettering on
> yellow background
>
> b[.]{.underline} Controlled Area signs are pink lettering on green
> background; Radiation Area signs are black lettering on red background
>
> c[.]{.underline} Controlled Area signs are black lettering on yellow
> background; Radiation Area signs are blue lettering on white
> background
>
> d[.]{.underline} The color of the signs makes no difference

2\. What is the whole-body occupational dose limit for a DOE employee or
facility user?

> a[.]{.underline} 100 rem per year
>
> b[.]{.underline} 100 millirem per year
>
> c[.]{.underline} 5 rem per year
>
> d[.]{.underline} 500 millirem per year

3\. After receiving this training, you may act as the escort for an
untrained visitor within which of the following areas?

> a[.]{.underline} Dark side of the moon
>
> b[.]{.underline} All Controlled Areas which you are familiar with
>
> c[.]{.underline} Controlled Areas and Radiological Material Areas
>
> d[.]{.underline} Controlled Areas and Radiation Areas

4\. Which of the following is an ALARA practice that will reduce an
individual radiation dose?

> a[.]{.underline} Decrease distance from the radiation source, decrease
> the amount of shielding, decrease the time
>
> b[.]{.underline} Increase distance from the radiation source, use
> correct shielding, decrease the time in the area
>
> c[.]{.underline} Increase distance from the radiation source, use
> heavy shielding, increase the time in the area
>
> d[.]{.underline} Decrease distance from the source, use light
> shielding, decrease the time in the area

5\. After completing this course, *Radiation Safety at Accelerators*,
you are qualified to work in which of the following areas unescorted?

> a[.]{.underline} Radiation Areas
>
> b[.]{.underline} Controlled Areas
>
> c[.]{.underline} Radiological Material Area
>
> d[.]{.underline} All of the above

6\. What is the primary physical means of protection from radiation at
the 88-Inch Cyclotron?

> a[.]{.underline} survey meters
>
> b[.]{.underline} shielding
>
> c[.]{.underline} there is none
>
> d[.]{.underline} dosimeters

7\. Radiation exposure at the 88-Inch Cyclotron is primarily from:

> a[.]{.underline} the beam when the accelerator is on
>
> b[.]{.underline} the beam when the accelerator is on and the residual
> fields from activation products at other times
>
> c[.]{.underline} the beam whether the accelerator is on or off
>
> d[.]{.underline} nuclear fusion

8\. Ionizing radiation can be found in the form of:

> a[.]{.underline} alpha particles
>
> b[.]{.underline} neutrons
>
> c[.]{.underline} gamma rays
>
> d[.]{.underline} beta particles
>
> e[.]{.underline} heavy ions
>
> f[.]{.underline} all of the above

9.  An area posted as a "Radiation Area" has radiation fields in which
    range:

> a[.]{.underline} Over 100 mrem/hour at 30 cm and over 5 times above
> background
>
> b[.]{.underline} Over 50 mrem/hr at 30 cm and over 5 times above
> background
>
> c[.]{.underline} Over 5 mrem/hr and less than 100 mrem/hr at 30 cm
>
> d[.]{.underline} Over 50 mrem/hr at 15 cm

10\. Radiation exposure to LBNL personnel and guests is assessed using:

> a[.]{.underline} thermal luminescent dosimeters only
>
> b[.]{.underline} rainwater and sewer samples
>
> c[.]{.underline} personal dosimetry, area detectors, and other
> monitors
>
> d[.]{.underline} employees/guests at LBNL are not exposed to radiation

11\. A *Nonradiation* safety hazard found at accelerators is:

> a[.]{.underline} toxic chemicals
>
> b[.]{.underline} high voltage
>
> c[.]{.underline} tripping hazards
>
> d[.]{.underline} flammable gases
>
> e[.]{.underline} all of the above

12\. Which of the following is the correct way to use your dosimeter?

> a[.]{.underline} Worn on your belt with the window *facing in*
>
> b[.]{.underline} Worn on your torso with the window *facing out*
>
> c[.]{.underline} Worn to the doctor
>
> d[.]{.underline} Left in your desk drawer

13\. Wearing a dosimeter will:

> a[.]{.underline} Prevent any radiation exposure to you
>
> b[.]{.underline} Allow your radiation exposure to be monitored
>
> c[.]{.underline} Reduce your background radiation exposure
>
> d[.]{.underline} Notify you of radiation exposure by turning yellow

14\. The exposure limit for the *general public* and *non-radiation
workers* is:

> a[.]{.underline} 5 rem/year
>
> b[.]{.underline} 1 rem/year
>
> c[.]{.underline} 500 mrem/year
>
> d[.]{.underline} 100 mrem/year

15\. Radiation dose depends on:

> a[.]{.underline} whether the radiation is background or occupational
>
> b[.]{.underline} whether it's from a residual field or internal
> contamination
>
> c[.]{.underline} the amount and type of radiation absorbed by the body
>
> d[.]{.underline} your age

16. What are LBNL's main written resource for proper procedures and
    safety practices?

> a[.]{.underline} Director's Statement of Healthy & Safety Policy
>
> b[.]{.underline} Activity Hazard Documents (AHDs) and the LBNL Health
> & Safety
>
> Manual (Pub 3000)
>
> c[.]{.underline} Rules and Procedures Manual (RPM)
>
> d[.]{.underline} LBNL has no written procedures or safety guidelines

17\. Select an administrative control for prompt radiation:

> a[.]{.underline} Run/safe switches
>
> b[.]{.underline} Procedures
>
> c[.]{.underline} Physical barriers
>
> d[.]{.underline} Warning lights

18\. During Prompt External Radiation Field (PERF) runs, what must you
do before working inside a controlled area?

> a[.]{.underline} Check out special dosimetry
>
> b[.]{.underline} Leave your dosimeter outside so it doesn't pick up a
> dose
>
> c[.]{.underline} Check the field on the map or neutron meters in
> Control Room and check out key; keep an eye out for roped off
> Radiation Areas
>
> d[.]{.underline} Obtain approval of the Health Physicist

19\. If you find contamination on your hand when leaving an area, what
action should you take?

> a[.]{.underline} Proceed to sink, attempt decontamination and resurvey
>
> b[.]{.underline} Resurvey, if contamination confirmed, phone or yell
> for help
>
> c[.]{.underline} STOP, WARN, ISOLATE, MONITOR, SECURE
>
> d[.]{.underline} Proceed to nearest shower

20\. Possible personnel contamination is determined by use of which of
the following?

> a[.]{.underline} Hand and Foot Counter
>
> b[.]{.underline} GeLi detector
>
> c[.]{.underline} Liquid Scintillation Detector
>
> d[.]{.underline} Self-reading dosimeter