You're using an outdated browser. This website will not display correctly and some features will not work.
Learn more about the browsers we support for a faster and safer online experience.

 

ontario regulation 106/18

made under the

Occupational Health and Safety Act

Made: February 21, 2018
Filed: March 15, 2018
Published on e-Laws: March 15, 2018
Printed in The Ontario Gazette: March 31, 2018

Amending Reg. 861 of R.R.O. 1990

(X-RAY SAFETY)

1. The definition of “Director” in section 1 of Regulation 861 of the Revised Regulations of Ontario, 1990 is revoked.

2. Subsection 3 (1) of the Regulation is amended by striking out “Atomic Energy Control Act (Canada)” and substituting “Nuclear Safety and Control Act (Canada)”.

3. (1) Subsection 5 (1) of the Regulation is amended by striking out “the Director” at the end and substituting “a Director”.

(2) Subsection 5 (2) of the Regulation is amended by striking out “Form 1 and shall be filed with the Director” at the end and substituting “a form obtained from the Ministry and shall be filed with a Director”.

(3) Subsection 5 (4) of the Regulation is amended by striking out “the Director advising the Director” and substituting “a Director advising the Director”.

(4) Subsection 5 (5) of the Regulation is amended by striking out “the Director” and substituting “a Director”.

4. (1) Subsection 6 (3) of the Regulation is amended by striking out “Form 2” and substituting “a form obtained from the Ministry”.

(2) Subsections 6 (5) and (8) of the Regulation are each amended by striking out “the Director” at the end and substituting “a Director”.

5. Subsection 7 (1) of the Regulation is amended by striking out “the Director” at the end and substituting “a Director”.

6. Sections 8 and 13 of the Regulation are each amended by striking out “the Director” and substituting “a Director”.

7. Section 14 of the Regulation is amended by striking out the first instance of “the Director” and substituting “a Director”.

8. The Schedule to the Regulation is revoked and the following substituted:

SCHEDULE

Column 1

Part of body irradiated

Column 2

Exposure conditions and comments

Column 3

Dose equivalent annual limit (in millisieverts) for X-ray workers

Column 4

Dose equivalent annual limit (in millisieverts) for other workers

Whole body or trunk of body

Uniform irradiation

50

5

Partial or non-uniform

Irradiation of body

The limit applies to the effective dose equivalent defined in Note (a)

50

5

Lens of eye

Irradiated either alone or with other organs or tissues

150

50

Skin

The limit applies to the mean dose equivalent to the basal cell layer of the epidermis for any area of skin of 1 square centimetre or more

500

50

Individual organs or tissues other than lens of eye or skin

The limit on effective dose equivalent applies, with an overriding limit on the dose equivalent to the individual organ or tissue

500

50

Notes to the Schedule:

(a) The effective dose equivalent, HE, is determined by the following formula:

HE = ΣTWTHT

where:

(i) T is an index for tissue type;

(ii) HT is the annual dose equivalent in tissue T;

(iii) WT is a weighting factor which has the following values:

0.25 for the gonads,

0.15   for the breast,

0.12   for the red bone marrow,

0.12   for the lungs,

0.03   for the bone surfaces,

0.03   for the thyroid, and

0.06 for each of the five other organs or tissues receiving the highest dose equivalents, but excluding the skin, extremities and eye lenses. The exposure of all other remaining tissues can be neglected. When the gastro-intestinal tract is irradiated, the stomach, small intestine, upper large intestine and lower large intestine shall be considered as four separate organs; and

(iv)   ΣTWTHT is the sum of the WTHT values for all irradiated tissues which receive more than 1 millisievert in a given year.

(b) The annual limits do not include any dose equivalent received by a worker from background sources or received as a patient undergoing medical diagnostic or therapeutic procedures.

(c) The annual limits include any dose equivalent received by a worker, as a consequence of his or her occupation, from all sources of ionizing radiation.

9. Forms 1 and 2 of the Regulation are revoked.

Commencement

10. This Regulation comes into force on the day it is filed.