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Title 18 . Environmental Conservation
Chapter 85 . Administrative Enforcement
Section 440. Shielding

18 AAC 85.440. Shielding

All installations for the use of X-rays in the healing arts shall comply with the shielding requirements of this section:

(1) each medical or veterinary X-ray installation shall be provided with such primary barriers and/or secondary barriers as are necessary to assure compliance with secs. 130, 170, and 180; this requirement shall be deemed to be met if the thickness and design of such barriers are equivalent to those as computed and designed in accordance with the recommendations of the National Committee on Radiation Protection and Measurements (NCRP) in NCRP Report No. 34, "Medical X-Ray and Gamma-Ray Protection for Energies up to 10 MeV - Structural Shielding Design and Evaluation," published December 1, 1969; this report is available from NCRP publications, 7910 Woodmont Avenue, Suite 800, Bethesda, Maryland 20814, at a cost of $1.50;

(2) each dental X-ray installation shall be provided with such primary barriers and/or secondary barriers as are necessary to assure compliance with secs. 130, 170, and 180; this requirement shall be deemed to be met if the thickness and design of such barriers are equivalent to those as computed and designed in accordance with the recommendations of the National Committee on Radiation Protection and Measurements (NCRP) in NCRP Report No. 35, "Dental X-Ray Protection" published March 9, 1970; this report is available from NCRP publications, 7910 Woodmont Avenue, Suite 800, Bethesda, Maryland 20814, at a cost of $1.50;

(3) lead barriers shall be mounted in such a manner that they will not sag or cold-flow because of their own weight and shall be protected against mechanical damage;

(4) all joints, including those between different kinds of protective materials, and joints at the floor and ceiling, shall be so designed that the overall protection provided by the barrier is not impaired;

(5) windows, window frames, doors, and door frames shall have the same lead equivalent as that required of the adjacent wall;

(6) holes in protective barriers shall be covered so that the overall protection is not impaired.

History: Eff. 9/16/71, Register 39

Authority: AS 46.03.020

AS 46.03.260

Publisher's note: Pursuant to directions from the Department of Law, the address in (1) and (2) of this section was corrected as of Register 140 (January 1997).


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Last modified 7/05/2006