Quiz: NRC Regulations

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Test: NRC Regulations

Part 1: Current NRC Regulations Related to Radiation Safety

1. Secretarial space, hallways, and certain other areas of a department must qualify as an UNRESTRICTED AREA. Which ONE of the following readings is the maximum acceptable in an unrestricted area?

2 mRem in 1 hr and 50 mRem in one year

2 mRem in 1 hr and 100 mRem in one year

5 mRem in 1 hr and 50 mRem in one year

5 mRem in 1 hr and 100 mRem in one year

10 mRem in 1 hr and 50 mRem in one year

2. What is the regulation regarding posting of radiation safety rules?

General Radiation Safety rules (no smoking, eating, drinking, etc), must be posted in each laboratory in which radioactive materials are used.

State/NRC regulations and telephone numbers must be posted conspicuously in each Nuclear Medicine Laboratory

Both are required

Neither are required

3. A female technologist enters your office and announces to you that she is pregnant and the estimated date of conception is June 1, 2007 (2 required pieces of information). Is she legally considered a “DECLARED PREGNANT WORKER”?

Yes

4. What are the dose limits to the embryo/fetus for a woman who meets the requirements of a declared pregnant worker?

Dose to the embryo/fetus over entire period of gestation (9 mos.) is 0.05 rem

Dose to the embryo/fetus over entire period of gestation (9 mos.) is 0.5 rem

Dose to the embryo/fetus over entire period of gestation (9 mos.) is 5.0 rem

None of the Above

5. For an occupationally exposed individual for one year, the maximum permissible whole body dose, the extremity dose, internal organ dose, and the dose to the lens of the eye are, respectively...

5 Rem, 50 Rem, 50 Rem, and 15 Rem

5 Rem, 50 Rem, 15 Rem, and 50 Rem

5 Rem, 15 Rem, 50 Rem, and 50 Rem

15 Rem, 50 Rem, 5 Rem, and 50 Rem

6. If you have accumulated a whole body dose of 1,000 mRem at your current institution as of June 15 of this year and you are starting a new job on June 16, you will be permitted _____ additional mRem for the remainder of the calendar year.

5,000

4,000

500

400

7. How often MUST an employer inform his radiation workers of their radiation exposure levels?

Weekly

Monthly

Quarterly

Annually

8. A Nuclear Medicine Technologist performed requisite QC testing on the dose calibrator at 7:00 AM this morning. If the Tech is called in to perform a stat lung scan at 12:15 tomorrow morning, the elapsed time will be 17 hours and 15 minutes. Which one of the following statements is correct?

It is not necessary to repeat any of the dose calibrator tests since <24 hr has elapsed

It is necessary to repeat the constancy test on Tc99m and Xe133 if patient is to be vented

It is necessary to repeat the accuracy test

It is necessary to repeat repeat accuracy, constancy, and linearity tests

9. The NRC or State Inspector blows a puff of smoke under the closed door in the room in which Xe-133 ventilation studies are performed. What is the purpose of this test, and what should happen to the puff of smoke?

The smoke should be blown back into the hallway as positive pressure is required in a room in which ventilation studies are being performed.

The smoke should flow under the door and into the room as positive pressure is required in a room in which ventilation studies are being performed

The smoke should be blown back into the hallway as negative pressure is required in a room in which ventilation studies are being performed.

The smoke should flow under the door and into the room as negative pressure relative to the hallway is required in a room in which ventilation studies are being performed

10. One of the policies that help to minimize radiation dose to Nuclear Medicine Technologists is called the ALARA Policy. For what does the acronym stand?

At least a reasonable amount

As low as reasonably acceptable

As low as reasonably achievable

None of the Above

11. The Radiation Safety Program and the ALARA Policy must be reviewed periodically. Whose job is it to do so, and how often must it be done?

RSO, semiannually

RSO, annually

Director of Nuclear Medicine, semi-annually

Director of Nuclear Medicine, annually

12. One is permitted to designate one sink in the laboratory as a “HOT SINK” for disposal of low-activity radioactive waste. The institutional limit is...

10 Ci per year for all isotopes

1 Ci per year for all isotopes

100 mCi per year for all isotopes

There is no legal limit

13. According to the latest NRC Regulations, all administered doses must be within ____% of the prescribed dose

14. A male patient’s prescribed dose of Tl-201 chloride for a cardiac study was 3 mCi. The technologist inadvertently administered 5 mCi, a 67% overdose. Testicular dose (critical organ in males) was 15 R, kidney dose was 5.1 R, and whole body dose was 2 R. This was...

Not an event

A recordable event

A reportable event

A therapeutic misadministration

15. A patient was treated with I-131 NaI for hyperthyroidism. The actual dose was 17 mCi; the prescribed dose was 10 mCi. This was...

Not an event

A recordable event

A reportable event

A therapeutic misadministration

16. You administered a 150 mCi therapeutic dose of I-131 to a patient with thyroid cancer. According to the current NRC Regulations, which of the following is required by law for the person performing the dose administration?

Thyroid count at 24-72 hr post admin time

24-72 hr urine sample must be counted

Both of the Above

Neither of the Above

17. Consider the following six sources of our background radiation:

Cosmic rays
Flying in aircraft
Global fallout
Internal Radioactivity
Nuclear Power Plants
Radon and other terrestrial sources

The three most significant sources of our background radiation include:

1, 2, and 4

1, 2, and 6

2, 4, and 6

1, 4, and 6

18. According to the NRC, an adult is defined as a person ____ or more years of age.

19. A radiation area and a high radiation area are, respectively, areas in which an individual could receive a dose of _____ mRem in 1 hour at a distance of 30 cm from the source.

1, 5

5,10

1, 50

5, 100

20. Respectively, what are the whole body doses in humans?

50, 100

200, 380

350, 550

1000, 3000

21. An individual must be monitored for radiation dose with a film badge if his dose is likely to exceed ____% of the MPD

22. A teaching hospital in which there are Residency Programs has a _______ license

Specific

General

Broad

Unlimited

23. A GM Survey of your lab and a wipe test must be performed ______ and ______, respectively.

Daily and daily

Daily and weekly

Weekly and daily

Weekly and weekly

24. How often must one perform leak-testing on sealed source?

Weekly

Monthly

Quarterly

Semi- Annually

25. Which one of the following statements is TRUE?

An agreement state is one which has signed an agreement with the US NRC stipulating that the NRC will do all the regulating and all the inspections and will follow the state guidelines

An agreement state is one which has signed an agreement with the US NRC stipulating that the State will do all the regulating and all the inspections and will follow NRC Guidelines

An agreement state may be less restrictive than the US NRC on Radiation Safety Issues

The ratio of NRC States to Agreement States is approximately 36:14.

26. Who is the licensee in your hospital?

Director of Nuclear Medicine

Director of Radiology

Directors of Nuclear Medicine & Radiology

The Institution

Each individual user of radioactivity

27. Both hand monitoring and treadmill monitoring are required on a(n) _______ basis

Hourly

Daily

Twice Daily

Weekly

28. Which of the following must be trained in Radiation Safety on an annual basis?

Nuc Med Techs

All Radioisotope Users

Housekeeping

Security officers accompanying a person delivering radioactive materials.

All of the Above

29. The NRC or State Inspector has completed his inspection and it is 5 PM. Only you and the inspector remain in the department, and you both have your coats on, ready to leave for the day. The inspector walks over to the Hot Lab door, opens it, looks around, and begins writing a note on his pad. Which one of the following applies?

Diagnostic reportable event

Radiation Safety Security

Diagnostic recordable event

None of the Above

30. Regarding the rules for opening packages: which of the following packages must be wipe-tested for surface contamination? (Read all possible answers!)

a.) A package containing a vial of Xe-133

b.) A package containing a vial of Tl-201 chloride

c.) An ammo can from a central pharmacy containing several unit doses of Tc-99m MDP

b and c only

All of the Above

31. Which of the following is/are acceptable methods of waste disposal?

Transfer to licensed person/company

Decay in storage

Release as effluents within authorized limits

All of the Above

Part 2: Hot Lab Regulations

32. Within what limits must the expected and measured readings on a dose calibrator be?

± 5%

± 10%

± 15%

± 20%

33. How often should a dose calibrator be checked for accuracy?

Daily

Monthly

Quarterly

Annually

34. Is the following accuracy test a “Pass” or a “Fail”?

Standard Energy expected measure

(keV) value (mCi) value (mCi)

Co-57                 122              2.48                  2.51
Cs-137               662              3.38                  3.29
Co-60              1,332            1.55                  1.52

Pass

Fail

35. How often must a dose calibrator be checked for constancy?

Daily

Weekly

Monthly

Quarterly

36. Is the following constancy test a “Pass” or a “Fail”?

Isotope Reading (mCi)

Setting       Mon    Tues   Wed    Thu     Fri
Cs-137      123      124     122      126    124
Ga-67        223      224     222      226    224
Tl-201        163      164    162      166    164
Tc-99m      243      244     242      246    244
I-131           313      314     312      316    314
I-123           193      194     192      196    194
In-111         283      284     282      286    284
Xe-133        433      434     432      436    434

Pass

Fail

37. How often must a dose calibrator be checked for linearity?

Daily

Monthly

Quarterly

Annually

38. Is the following linearity test a “Pass” or a “Fail”?

Elapsed expected measured

time (hr) value value

0                      300                  300
1                      267                  230
2                      238                  201
3                      212                  135
6    (1 HL)        150                  92
12 (2 HL)      75                    36.4
24 (4 HL)        18.75               7.5

Pass

Fail

39. How often must a dose calibrator be checked for geometry?

Weekly

Monthly

Quarterly

At time of Installation

40. Is this geometry test a “Pass” or a “Fail”?

Sample Volume Activity (mCi)

0.5 ml                         25.5
1.0                               25.3
2.0                               25.0
3.0                               24.8
4.0                               24.7
5.0                               24.5
6.0                               24.4

Pass

Fail

41. Which of the following is an example of a radionuclide impurity?

Mo-99 in the generator eluate

I-123 Iodide in a preparation of I-123 mIBG

Aluminum ion breakthrough

Hydrolyzed reduced Tc in a preparation of Tc-99m MDP

42. Which of the following is/are examples of a radiochemical impurity?

Mo-99 in the generator eluate
I-123 Iodide in a preparation of I-123 mIBG
Aluminum ion breakthrough
Hydrolyzed reduced Tc in a preparation of Tc-99m MDP

4 only

1 and 4

2 and 3

2 and 4

43. Which ONE of the following is an example of a chemical impurity?

Mo-99 in the generator eluate

I-123 Iodide in a preparation of I-123 mIBG

Aluminum ion breakthrough

Hydrolyzed reduced Tc in a preparation of Tc-99m MDP

44. Which ONE of the following test methods is suitable for determining radiochemical purity of a radiopharmaceutical?

Thin layer chromatography

Dose Calibrator

Multichannel Analyzer

Colorimetry

45. What is upper limit of Mo-99 breakthrough in a generator eluate?

0.15 mCi Mo/mCi Tc at time of elution

0.15 mCi Mo/mCi Tc at time of administration

10 ppm

Not Applicable, this is not a mandatory test for generators

46. Which of the following radiochemical impurities will result in the appearance of liver and spleen on bone scans performed following injection of Tc-99m MDP?

Free Tc

Hydrolyzed Reduced Tc

Tc-99m Tartrate

Tc-99m labeled stereochemical impurities

47. Why don’t we test for the presence of HR Tc in Tc-99m MAA?

It’s never present, so we don’t need to test for it

HR Tc is not radioactive and doesn’t interfere with scans

Even if it is present in significant quantities, it has no effect on the lung scan

There is no simple way to test for HR Tc in preparations of Tc-99m MAA

48. What is the upper limit of Al³⁺ breakthrough in a generator eluate?

1 ppm, but no longer a mandatory test for generators

5 ppm but no longer a mandatory test for generators

10 ppm but no longer a mandatory test for generators

20 ppm but no longer a mandatory test for generators

49. What are the release criteria in an NRC state for hospitalized patients treated with high-dose I-131 therapy for thyroid Ca?

5 mR/hr at 1 m from chest

5 mR/hr at 10 cm from chest

7 mR/hr at 1 m from chest

7 mR/hr at 10 cm from chest

50. ONE of the routinely performed radioisotope dose calibrator tests involves use of a long-lived source (usually 30.2 y Cs-137). The source is placed in the calibrator and then readings are taken every day on the Cs-137 setting as well as on settings for every radioisotope likely to be used during the day. Which test is described above?

Accuracy

Constancy

Linearity

Geometry

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