Ohio Admin. Code 3701:1-38-11 - Radiation protection standards, general provisions
(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 ,
or
(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.
Notes
Promulgated Under: 119.03
Statutory Authority: 3748.04
Rule Amplifies: 3748.04
Prior Effective Dates: 07/22/2001, 10/22/2006, 09/01/2011
Promulgated Under: 119.03
Statutory Authority: 3748.04
Rule Amplifies: 3748.04
Prior Effective Dates: 07/22/2001, 10/22/2006, 09/01/2011
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