Ohio Administrative Code › Title 3701:1 - Radiation Control › Chapter 3701:1-38 - General Radiation Protection Standards for Sources of Radiation › Section 3701:1-38-11 - Radiation protection standards, general provisions

Current through all regulations passed and filed through July 1, 2024
(A) Quality factors
			 for converting absorbed dose to dose equivalent are as follows:
Type of radiation
Quality factor (Q)
Absorbed dose equal to a unit dose equivalentA/
X-, gamma, or beta radiation and high-speed electrons
						  ....
1
1
Alpha particles, multiple-charged particles, fission
						  fragments and heavy particles of unknown charge ....
20
0.05
Neutrons of unknown energy ....
10
0.1
High-energy protons ....
10
0.1
A/ Absorbed dose in gray equal to
				one sievert or the absorbed dose in rad equal to one rem.
(B) If it is more convenient to measure the
			 neutron fluence rate than to determine the neutron dose equivalent rate in
			 sievert per hour or rem per hour, as provided in paragraph (A) of this rule,
			 0.01 sievert
(
one
			 rem
)
of neutron
			 radiation of unknown energies may, for purposes of these regulations, be
			 assumed to result from a total fluence of twenty-five million neutrons per
			 square centimeter incident upon the body. If sufficient information exists to
			 estimate the approximate energy distribution of the neutrons, the licensee may
			 use the fluence rate per unit dose equivalent or the appropriate Q value as
			 provided in this paragraph to convert a measured tissue dose in gray or rad to
			 dose equivalent in sievert or rem as follows:
Neutron energy (MeV)
Quality factorA/ (Q)
Fluence per unit dose
						  equivalentB/ (neutrons
						  cm-2 rem-1)
Fluence per unit dose equivalentB/
							 (neutrons cm-2
						  Sv-1)
(Thermal)........
2.5 x10-8
2
980x106
980x108
1x10-7
2
980x106
980x108
1x10-6
2
810x106
810x108
1x10-5
2
810x106
810x108
1x10-4
2
840x106
840x108
1x10-3
2
980x106
980x108
1x10"-2
2.5
1010x106
1010x108
1x10"-1
7.5
170x106
170x108
5x10"-1
11
39x106
39x108
1
11
27x106
27x108
2.5
9
29x106
29x108
5
8
23x106
23x108
7
7
24x106
24x108
10
6.5
24x106
24x108
14
7.5
17x106
17x108
20
8
16x106
16x108
40
7
14x106
14x108
60
5.5
16x106
16x108
1x102
4
20x106
20x108
2x102
3.5
19x106
19x108
3x102
3.5
16x106
16x108
4x102
3.5
14x106
14x108
A/Value of quality factor (Q) at the
				point where the dose equivalent is maximum in a 30-centimeter diameter cylinder
				tissue-equivalent phantom.
B/Monoenergetic neutrons incident
				normally on a 30-centimeter diameter cylinder tissue-equivalent phantom.
(C) For the purpose of
			 Chapter 3701:1-38 of the Administrative Code, activity is expressed in the SI
			 unit of becquerel, Bq, or in the special unit of curie, Ci, or their multiples,
			 or disintegrations or transformations per unit of time.
(D) Radiation protection programs.
(1) Each licensee or registrant shall
			 develop, document, and implement a radiation protection program commensurate
			 with the scope and extent of licensed or registered activities to ensure
			 compliance with the provisions of this chapter.Record keeping requirements are
			 provided in paragraph (B) of rule
			 3701:1-38-20 of the
			 Administrative Code.
(2) The
			 licensee or registrant shall use, to the extent practicable, procedures and
			 engineering controls based upon sound radiation protection principles to
			 achieve occupational doses and public doses that are as low as is reasonably
			 achievable.
(3) The licensee or
			 registrant shall, at intervals not to exceed twelve months, review the
			 radiation protection program content and implementation.
(4) To implement the ALARA requirements of
			 paragraph (D)(2) of this rule, and notwithstanding the requirements in rule
			 3701:1-38-13
			 of the Administrative Code, a constraint on air emissions of radioactive
			 material to the environment, excluding radon-222 and its daughters, shall be
			 established by licensees, such that the individual member of the public likely
			 to receive the highest dose will not be expected to receive a total effective
			 dose equivalent in excess of 0.1 millisievert(ten millirem) per year from these
			 emissions. If a licensee subject to this requirement exceeds this dose
			 constraint, the licensee shall report the amount exceeding the dose constraint
			 as provided in paragraph (C) of rule
			 3701:1-38-21 of the
			 Administrative Code and promptly take appropriate corrective action to ensure
			 against recurrence.