Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 120.000 - The Control of Radiation
RADIATION DOSE LIMITS
Section 120.222 - Compliance with Dose Limits for Individual Members of the Public

Universal Citation: 105 CMR 120.000 MA Code of Regs 120.222

Current through Register 1531, September 27, 2024

(A) The licensee or registrant shall make or cause to be made surveys of radiation levels in unrestricted areas and radioactive materials in effluents released to unrestricted areas to demonstrate compliance with the dose limits for individual members of the public in 105 CMR 120.221.

(B) A licensee or registrant shall show compliance with the annual dose limit in 105 CMR 120.221 by:

(1) demonstrating by measurement or calculation that the total effective dose equivalent to the individual likely to receive the highest dose from the licensed or registered operation does not exceed the annual dose limit; or,

(2) demonstrating that:
(a) the annual average concentrations of radioactive material released in gaseous and liquid effluents at the boundary of the unrestricted area do not exceed the values specified in 105 CMR 120.296: Appendix B, Table II; and,

(b) if an individual were continuously present in an unrestricted area, the dose from external sources would not exceed 0.002 rem (0.02 millisievert) in an hour and 0.05 rem (0.5 millisievert) in a year.

(C) Upon approval from the Agency, the licensee may adjust the effluent concentration values in 105 CMR 120.296: Appendix B, Table II, for members of the public, to take into account the actual physical and chemical characteristics of the effluents, such as, aerosol size distribution, solubility, density, radioactive decay equilibrium, and chemical form.

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