IRR(17) dose limits

Question 1

Effective dose limit for employees 18+ y/o

Answer 1

20 mSv per year
or
100 mSv across 5 years

Question 2

Equivalent dose limits for lens and extremities for employees 18+y/o

Answer 2

Lens: 20 mSv
Extremities: 500 mSv

Question 3

Effective dose limit for employees <18 y/o

Answer 3

6 mSv

Question 4

Equivalent dose limit for lens and extremities for employees <18 y/o

Answer 4

Lens: 15 mSv
Extremities: 150 mSv

Question 5

Equivalent dose limit for lens and extremities for member of public

Answer 5

Lens: 15 mSv
Extremities: 50 mSv

Question 6

Effective dose limits for anyone else/member of public

Answer 6

1mSv
or
5 mSv over 5 years

Question 7

Effective dose limits to limit stochastic effects for Anyone <16 years old

Answer 7

1 mSv

Question 8

Effective dose limits to limit stochastic effects for Comforters and carers

Answer 8

5 mSv

Question 9

Effective dose limit to reproductive abdomen?

Answer 9

13 mSv across 3 months

Question 10

Effective dose limit to foetus of pregnant employees

Answer 10

1 mSv for remainder of pregnancy

Question 11

Who is classed as a classified worker?

Answer 11

Anyone:

• Over age 18
• likely to recieve effective dose >6 mSv per year
• equivalent dose to eye of >15mSv or to skin of >150mSv

Question 12

What defines a Controlled area?

Answer 12

Area where exposure of >6mSv per year is likely
External dose rates exceed 7.5 microSv/hr
Instant dose rate exceeds 10 microSv/hr

Question 13

What defines a Supervised area?

Answer 13

Area where exposure to >1 mSv per year is likely

Question 14

If member of the public is over exposed, who do you report this to under IRR(17)?

Answer 14

Health and Safety Executive

Question 15

The RPA is responsible for what?

Answer 15

Designating controlled and supervised AREAS
Risk ASSESSMENTS
Quality ASSURANCE
Calibration of equipment
Contingency plans
Local rules

Question 16

The RPS is responsible for what?

Answer 16

Ensure local rules are complied with
Know what to do in an emergency
Must always be present on site

Question 17

In IR(ME)R 17, the employer has what responsibilities?

Answer 17

PRRST:

Provides procedures and protocols
Allocates roles
Respond to incidents
Staff Training