Iowa Admin. Code r. 641-38.4 - General regulatory requirements
(1)
Records.
a. Each licensee and registrant shall
maintain records showing the receipt, transfer, and disposal of all sources of
radiation. Additional record requirements are specified elsewhere in these
rules.
b. Electronic records.
(1) A record or signature shall not be denied
legal effect or enforceability solely because it is in electronic
form.
(2) A contract shall not be
denied legal effect or enforceability solely because an electronic record was
used in its formation.
(3) If a
rule requires a record to be in writing, an electronic record shall satisfy the
rule.
(4) If a rule requires a
signature, an electronic signature shall satisfy the rule.
(2)
Inspections.
a. Each licensee and registrant shall afford
the agency at all reasonable times opportunity to inspect sources of radiation
and the premises and facilities wherein such sources of radiation are used or
stored.
b. Each licensee and
registrant shall make available to the agency for inspection, upon reasonable
notice, records maintained pursuant to these rules.
(3)
Tests. Each licensee and
registrant shall perform upon instructions from the agency, or shall permit the
agency to perform, such reasonable tests as the agency deems appropriate or
necessary including, but not limited to, tests of:
a. Sources of radiation;
b. Facilities wherein sources of radiation
are used or stored;
c. Radiation
detection and monitoring instruments; and
d. Other equipment and devices used in
connection with utilization or storage of licensed or registered sources of
radiation.
(4)
Units of exposure and dose.
a. As used in these rules, the quality
factors for converting absorbed dose to dose equivalent are shown in Table I.
TABLE I
QUALITY FACTORS AND ABSORBED DOSE EQUIVALENCIES
TYPE OF RADIATION | Quality Factor (Q) | Absorbed Dose Equal to a Unit Dose Equivalent (see footnote "1") |
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 |
1. Absorbed dose
in rad equal to 1 rem or the absorbed dose in gray equal to 1 sievert.
b. If it is more
convenient to measure the neutron fiuence rate than to determine the neutron
dose equivalent rate in sievert per hour or rem per hour, as provided in
38.4(4) "a, " 1 rem (0.01 Sv) of neutron radiation of unknown energies may, for
purposes of these rules, be assumed to result from a total fiuence of 25
million neutrons per square centimeter incident upon the body. If sufficient
information exists to estimate the approximate energy distribution of the
neutrons, the licensee or registrant may use the fiuence rate per unit dose
equivalent or the appropriate Q value from Table II to convert a measured
tissue dose in gray or rad to dose equivalent in sievert or rem.
TABLE II
MEAN QUALITY FACTORS, Q, AND FLUENCE PER UNIT DOSE
EQUIVALENT FOR MONOENERGETIC NEUTRONS
Neutron Energy (MeV) | Quality Factor3 (Q) | Fluence per Unit Dose Equivalentb(neutrons cm-2rem-1) | Fluence per Unit Dose Equivalent (neutrons cnr2Sv_1) | |
(thermal) | 2.5E-8 | 2 | 980E+6 | 980E+8 |
1E-7 | 2 | 980E+6 | 980E+8 | |
1E-6 | 2 | 810E+6 | 810E+8 | |
1E-5 | 2 | 810E+6 | 810E+8 | |
1E-4 | 2 | 840E+6 | 840E+8 | |
1E-3 | 2 | 980E+6 | 980E+8 | |
1E-2 | 2.5 | 1010E+6 | 1010E+8 | |
1E-1 | 7.5 | 170E+6 | 170E+8 | |
5E-1 | 11 | 39E+6 | 39E+8 | |
1 | 11 | 27E+6 | 27E+8 | |
2.5 | 9 | 29E+6 | 29E+8 | |
5 | 8 | 23E+6 | 23E+8 | |
7 | 7 | 24E+6 | 24E+8 | |
10 | 6.5 | 24E+6 | 24E+8 | |
14 | 7.5 | 17E+6 | 17E+8 | |
20 | 8 | 16E+6 | 16E+8 | |
40 | 7 | 14E+6 | 14E+8 | |
60 | 5.5 | 16E+6 | 16E+8 | |
1E+2 | 4 | 20E+6 | 20E+8 | |
2E+2 | 3.5 | 19E+6 | 19E+8 | |
3E+2 | 3.5 | 16E+6 | 16E+8 | |
4E+2 | 3.5 | 14E+6 | 14E+8 |
aValue of quality factor (Q) at the point where the dose equivalent is maximum in a 30-centimeter diameter cylinder tissue-equivalent phantom.
bMonoenergetic neutrons incident normally on a 30-centimeter diameter cylinder tissue-equivalent phantom.
(5)
Units of activity. Rescinded IAB 4/8/98, effective
7/1/98.
(6)
Additional
requirements. The agency may, by rule, regulation, or order, impose
upon any licensee or registrant such requirements in addition to those
established in these rules as it deems appropriate or necessary to minimize
danger to public health and safety or property.
Notes
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