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Virginia Administrative Code
Title 12. Health
Agency 5. Department of Health
Chapter 481. Virginia Radiation Protection Regulations
6/25/2017

12VAC5-481-3750. Quantities for Use with Decommissioning.

Materials

Microcuries

Americium-241

.01

Antimony-122

100

Antimony-124

10

Antimony-125

10

Arsenic-73

100

Arsenic-74

10

Arsenic-76

10

Arsenic-77

100

Barium-131

10

Barium-133

10

Barium-140

10

Bismuth-210

1

Bromine-82

10

Cadmium-109

10

Cadmium-115m

10

Cadmium-115

100

Calcium-45

10

Calcium-47

10

Carbon-14

100

Cerium-141

100

Cerium-143

100

Cerium-144

1

Cesium-131

1,000

Cesium-134m

100

Cesium-134

1

Cesium-135

10

Cesium-136

10

Cesium-137

10

Chlorine-36

10

Chlorine-38

10

Chromium-51

1,000

Cobalt-55

100

Cobalt-56

10

Cobalt-57

100

Cobalt-58m

10

Cobalt-58

10

Cobalt-60

1

Copper-64

100

Dysprosium-165

10

Dysprosium-166

100

Erbium-169

100

Erbium-171

100

Europium-152 9.2h

100

Europium-152 13 yr

1

Europium-154

1

Europium-155

10

Fluorine-18

1,000

Gadolinium-153

10

Gadolinium-159

100

Gallium-72

10

Germanium-71

100

Gold-198

100

Gold-199

100

Hafnium-181

10

Holmium-166

100

Hydrogen-3

1,000

Indium-113m

100

Indium-114m

10

Indium-115m

100

Indium-115

10

Iodine-125

1

Iodine-126

1

Iodine-129

0.1

Iodine-131

1

Iodine-132

10

Iodine-133

1

Iodine-134

10

Iodine-135

10

Iridium-192

10

Iridium-194

100

Iron-55

100

Iron-59

10

Krypton-85

100

Krpton-87

10

Lanthanum-140

10

Lutetium-177

100

Manganese-52

10

Manganese-54

10

Manganese-56

10

Mercury-197m

100

Mercury-197

100

Mercury-203

10

Molbdenum-99

100

Neodymium-147

100

Neodymium-149

100

Nickel-59

100

Nickel-63

10

Nickel-65

100

Niobium-93m

10

Niobium-95

10

Niobium-97

10

Osmium-185

10

Osmium-191m

100

Osmium-191

100

Osmium-193

100

Palladium-103

100

Palladium-109

100

Phosphorus-32

10

Platinum-191

100

Platinum-193m

100

Platinum-193

100

Platinum-197m

100

Platinum-197

100

Plutonium-239

.01

Polonium-210

0.1

Potassium-42

10

Praseodymium-142

100

Praseodymium-143

100

Promethium-147

10

Promethium-149

10

Radium-226

.01

Rhenium-186

100

Rhenium-188

100

Rhodium-103m

100

Rhodium-105

100

Rubidium-86

10

Rubidium-87

10

Ruthenium-97

100

Ruthenium-103

10

Ruthenium-105

10

Ruthenium-106

1

Samarium-151

10

Samarium-153

100

Scandium-46

10

Scandium-47

100

Scandium-48

10

Seleium-75

10

Silicon-31

100

Silver-105

10

Silver-110m

1

Silver-111

100

Sodium-24

10

Strontium-85

10

Strontium-89

1

Strontium-90

0.1

Strontium-91

10

Strontium-92

10

Sulphur-35

100

Tantalum-182

10

Technetium-96

10

Technetium-97m

100

Technetium-97

100

Technetium-99m

100

Technetium-99

10

Tellurium-125m

10

Tellurium127m

10

Tellurium-127

100

Tellurium129m

10

Tellurium-129

100

Tellurium-131m

10

Tellurium-132

10

Terbium-160

10

Thallium-200

100

Thallium-201

100

Thallium-202

100

Thallium-204

10

Throium (natural)1

100

Thulium-170

10

Thulium-171

10

Tin-113

10

Tin-125

10

Tungsten-181

10

Tungsten-185

10

Tungsten-187

100

Uranium (natural)2

100

Uranium-233

.01

Uranium-234--Uranium-235

.01

Vandium-48

10

Xenon-131m

1,000

Xenon-133

100

Xenon-135

100

Ytterbium-175

100

Yttrium-90

10

Yttrium-91

10

Yttrium-92

100

Yttrium-93

100

Zinc-65

10

Zinc-69m

100

Zinc-69

1,000

Zirconium-93

10

Zirconium-95

10

Zirconium-97

10

Any alpha emitting radionuclide not listed above or mixtures of
alpha emitters of unknown composition

.01

Any radionuclide other than alpha emitting radio-nuclides,
not listed above or mixtures of beta emitters of unknown
composition

.1

1Based on alpha disintegration rate of Th-232, Th-230, and their daughter products.
2Based on alpha disintegration rate of U-238, U-234, and U-235.

Note: For purposes of 12VAC5-481-930, where there is involved a combination of isotopes in known amounts, the limit for the combination should be derived as follows: Determine, for each isotope in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific isotope when not in combination. The sum of such ratios for all the isotopes in the combination may not exceed "1" (i.e., "unity").

Statutory Authority

§ 32.1-229 of the Code of Virginia.

Historical Notes

Derived from Volume 24, Issue 18, eff. June 12, 2008; amended, Virginia Register Volume 32, Issue 24, eff. August 25, 2016.

Website addresses provided in the Virginia Administrative Code to documents incorporated by reference are for the reader's convenience only, may not necessarily be active or current, and should not be relied upon. To ensure the information incorporated by reference is accurate, the reader is encouraged to use the source document described in the regulation.

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