CHP Health Physics Regulations and Standards 3

Question 1

Under ICRP Publication 103 recommendations, what is the recommended annual effective dose limit for occupational workers?

Accepted Answer

20 mSv/year averaged over 5 years (not exceeding 50 mSv in any single year)

Answer

ICRP 103 recommends a dose limit of 20 mSv/year averaged over a 5-year period, with no single year exceeding 50 mSv.

Question 2

Which of the following best describes the difference between a radiation protection standard and a radiation protection guide?

Accepted Answer

Standards are legally enforceable regulations; guides are advisory recommendations

Answer

Regulatory standards have legal enforcement authority, while radiation protection guides (e.g., NCRP reports) are advisory in nature.

Question 3

What action level triggers mandatory reporting to the NRC under 10 CFR 20.2201 for lost or stolen licensed material?

Accepted Answer

Quantities greater than 10 times the applicable annual limit on intake (ALI)

Answer

10 CFR 20.2201 requires immediate report to the NRC when quantities greater than 10 times the ALI of licensed material are lost or stolen.

Question 4

The concept of 'derived air concentration' (DAC) in 10 CFR Part 20 is based on what assumption?

Accepted Answer

A 2000-hour work year with inhalation at 1.2 m³/hour resulting in one ALI intake

Answer

DAC is defined as the air concentration that, if breathed for a working year (2000 hours) at 1.2 m³/hour, would result in an intake of one ALI.

Question 5

Under 10 CFR 50 Appendix I, what is the dose design objective for liquid effluents from light-water reactors to unrestricted areas?

Accepted Answer

3 mrem/year to total body or any organ

Answer

Appendix I to 10 CFR Part 50 sets the design objective of 3 mrem/year from liquid effluents to any organ or total body for the public.

(CHP) Certified Health Physicist Practice Test