SCHEDULE 7Quantities and concentrations of radionuclides

PART 1Table of artificial radionuclides and naturally occurring radionuclides (which are processed for their radioactive, fissile or fertile properties)

Regulations 2(4), 6(2), 31(1), 31(3)and Schedule 1

1

2

3

4

5

6

Radionuclide name, symbol, isotope

Concentration for: Notification (any amount of radioactive material); Registration (amounts of radioactive material that exceed 1,000kg)

Quantity for Notification

Concentration for Registration (amounts of radioactive material that do not exceed 1,000kg)

Quantity for notification of occurrences

Quantity for notification of occurrences

Regulation 5(1) and Schedule 1, paragraph 1(a);regulation 6(2)(f)

Regulation 5(1) and Schedule 1, paragraph 1(b)

Regulation 6(2)(e)

Regulation 31(1)

Regulation 31(3)

(Bq/g)

(Bq)

(Bq/g)

(Bq)

(Bq)

Hydrogen

H-3 (tritiated compounds)

102

109

106

1012

1010

Beryllium

Be-7

10

107

103

1012

108

Carbon

C-11

0.01

106

10

1013

107

C-11 (monoxide)

0.01

109

10

1012

1010

C-11 (dioxide)

0.01

109

10

1012

1010

C-14

1

107

104

1011

108

Oxygen

O-15

0.01

109

102

1010

Fluorine

F-18

10

106

10

1013

107

Sodium

Na-22

0.1

106

10

1010

107

Na-24

0.1

105

10

1011

106

Silicon

Si-31

103

106

103

1013

107

Phosphorus

P-32

103

105

103

1010

106

P-33

103

108

105

1011

109

Sulphur

S-35

102

108

105

1011

109

Chlorine

Cl-36

1

106

104

1010

107

Cl-38

10

105

10

1013

106

Argon

Ar-37

0.01

108

106

1013

Ar-41

0.01

109

102

109

Potassium

K-401

1

106

102

1010

107

K-42

102

106

102

1012

107

K-43

10

106

10

1011

107

Calcium

Ca-45

102

107

104

1010

108

Ca-47

10

106

10

1011

107

Scandium

Sc-46

0.1

106

10

1010

107

Sc-47

102

106

102

1011

107

Sc-48

1

105

10

1011

106

Vanadium

V-48

1

105

10

1010

106

Chromium

Cr-51

102

107

103

1012

108

Manganese

Mn-51

10

105

10

1013

106

Mn-52

1

105

10

1010

106

Mn-52m

10

105

10

1013

106

Mn-53

102

109

104

1012

1010

Mn-54

0.1

106

10

1011

107

Mn-56

10

105

10

1012

106

Iron

Fe-52+

10

106

10

1012

107

Fe-55

103

106

104

1011

107

Fe-59

1

106

10

1010

107

Cobalt

Co-55

10

106

10

1011

107

Co-56

0.1

105

10

1010

106

Co-57

1

106

102

1011

107

Co-58

1

106

10

1010

107

Co-58m

104

107

104

1013

108

Co-60

0.1

105

10

1010

106

Co-60m

103

106

103

1016

107

Co-61

102

106

102

1013

107

Co-62m

10

105

10

1013

106

Nickel

Ni-59

102

108

104

1011

109

Ni-63

102

108

105

1011

109

Ni-65

10

106

10

1013

107

Copper

Cu-64

102

106

102

1012

107

Zinc

Zn-65

0.1

106

10

1010

107

Zn-69

103

106

104

1014

107

Zn-69m+

10

106

102

1012

107

Gallium

Ga-68

0.01

105

10

1013

106

Ga-72

10

105

10

1011

106

Germanium

Ge-68+

0.01

105

10

1010

106

Ge-71

104

108

104

1013

109

Arsenic

As-73

103

107

103

1011

108

As-74

10

106

10

1011

107

As-76

10

105

102

1011

106

As-77

103

106

103

1012

107

Selenium

Se-75

1

106

102

1011

107

Bromine

Br-82

1

106

10

1011

107

Krypton

Kr-74

0.01

109

102

109

Kr-76

0.01

109

102

1010

Kr-77

0.01

109

102

109

Kr-79

0.01

105

103

1010

Kr-81

0.01

107

104

1011

Kr-83m

0.01

1012

105

1012

Kr-85

0.01

104

105

1012

Kr-85m

0.01

1010

103

1010

Kr-87

0.01

109

102

109

Kr-88

0.01

109

102

109

Rubidium

Rb-86

102

105

102

1011

106

Strontium

Sr-85

1

106

102

1011

107

Sr-85m

102

107

102

1013

108

Sr-87m

102

106

102

1013

107

Sr-89

103

106

103

1010

107

Sr-90+

1

104

102

109

105

Sr-91+

10

105

10

1012

106

Sr-92

10

106

10

1012

107

Yttrium

Y-90

103

105

103

1011

106

Y-91

102

106

103

1010

107

Y-91m

102

106

102

1013

107

Y-92

102

105

102

1012

106

Y-93

102

105

102

1012

106

Zirconium

Zr-93+

10

107

103

109

108

Zr-95+

1

106

10

1010

107

Zr-97+

10

105

10

1011

106

Niobium

Nb-93m

10

107

104

1011

108

Nb-94

0.1

106

10

109

107

Nb-95

1

106

10

1011

107

Nb-97+

10

106

10

1013

107

Nb-98

10

105

10

1013

106

Molybdenum

Mo-90

10

106

10

1012

107

Mo-93

10

108

103

1011

109

Mo-99+

10

106

102

1011

107

Mo-101+

10

106

10

1013

107

Technetium

Tc-96

1

106

10

1011

107

Tc-96m

103

107

103

1014

108

Tc-97

10

108

103

1012

109

Tc-97m

102

107

103

1010

108

Tc-99

1

107

104

1010

108

Tc-99m

102

107

102

1013

108

Ruthenium

Ru-97

10

107

102

1012

108

Ru-103+

1

106

102

1010

107

Ru-105+

10

106

10

1012

107

Ru-106+

0.1

105

102

109

106

Rhodium

Rh-103m

104

108

104

1015

109

Rh-105

102

107

102

1012

108

Palladium

Pd-103+

103

108

103

1011

109

Pd-109+

102

106

103

1012

107

Silver

Ag-105

1

106

102

1011

107

Ag-108m+

0.1

106

10

1010

107

Ag-110m+

0.1

106

10

1010

107

Ag-111

102

106

103

1011

107

Cadmium

Cd-109+

1

106

104

1010

107

Cd-115+

10

106

102

1011

107

Cd-115m+

102

106

103

1010

107

Indium

In-111

10

106

102

1011

107

In-113m

102

106

102

1013

107

In-114m+

10

106

102

1010

107

In-115m

102

106

102

1013

107

Tin

Sn-113+

1

107

103

1011

108

Sn-125

10

105

102

1010

106

Antimony

Sb-122

10

104

102

1011

105

Sb-124

1

106

10

1010

107

Sb-125+

0.1

106

102

1010

107

Tellurium

Te-123m

1

107

102

1010

108

Te-125m

103

107

103

1010

108

Te-127

103

106

103

1012

107

Te-127m+

10

107

103

1010

108

Te-129

102

106

102

1014

107

Te-129m+

10

106

103

1010

107

Te-131

102

105

102

1014

106

Te-131m+

10

106

10

1011

107

Te-132+

1

107

102

1011

108

Te-133

10

105

10

1014

106

Te-133m

10

105

10

1013

106

Te-134

10

106

10

1013

107

Iodine

I-123

102

107

102

1012

108

I-125

102

106

103

1010

107

I-126

10

106

102

1010

107

I-129

0.01

105

102

109

106

I-130

10

106

10

1011

107

I-131

10

106

102

1010

107

I-132

10

105

10

1012

106

I-133

10

106

10

1011

107

I-134

10

105

10

1013

106

I-135

10

106

10

1012

107

Xenon

Xe-131m

0.01

104

104

1011

Xe-133

0.01

104

103

1011

Xe-135

0.01

1010

103

1010

Caesium

Cs-129

10

105

102

1012

106

Cs-131

103

106

103

1012

107

Cs-132

10

105

10

1011

106

Cs-134

0.1

104

10

1010

105

Cs-134m

103

105

103

1014

106

Cs-135

102

107

104

1011

108

Cs-136

1

105

10

1010

106

Cs-137+

0.1

104

10

1010

105

Cs-138

10

104

10

1013

105

Barium

Ba-131

10

106

102

1011

107

Ba-140+

1

105

10

1011

106

Lanthanum

La-140

1

105

10

1011

106

Cerium

Ce-139

1

106

102

1011

107

Ce-141

102

107

102

1010

108

Ce-143

10

106

102

1011

107

Ce-144+

10

105

102

109

106

Praseodymium

Pr-142

102

105

102

1012

106

Pr-143

103

106

104

1011

107

Neodymium

Nd-147

102

106

102

1011

107

Nd-149

102

106

102

1013

107

Promethium

Pm-147

103

107

104

1010

108

Pm-149

103

106

103

1011

107

Samarium

Sm-151

103

108

104

1010

109

Sm-153

102

106

102

1011

107

Europium

Eu-152

0.1

106

10

109

107

Eu-152m

102

106

102

1012

107

Eu-154

0.1

106

10

109

107

Eu-155

1

107

102

1010

108

Gadolinium

Gd-153

10

107

102

1010

108

Gd-159

102

106

103

1012

107

Terbium

Tb-160

1

106

1

1010

107

Dysprosium

Dy-165

103

106

103

1013

107

Dy-166

102

106

103

1011

107

Holmium

Ho-166

102

105

103

1011

106

Erbium

Er-169

103

107

104

1011

108

Er-171

102

106

102

1012

107

Thulium

Tm-170

102

106

103

1010

107

Tm-171

103

108

104

1011

109

Ytterbium

Yb-175

102

107

103

1011

108

Lutetium

Lu-177

102

107

103

1011

108

Hafnium

Hf-181

1

106

10

1010

107

Tantalum

Ta-182

0.1

104

10

1010

105

Tungsten

W-181

10

107

103

1012

108

W-185

103

107

104

1011

108

W-187

10

106

102

1012

107

Rhenium

Re-186

103

106

103

1011

107

Re-188

102

105

102

1012

106

Osmium

Os-185

1

106

10

1011

107

Os-191

102

107

102

1011

108

Os-191m

103

107

103

1012

108

Os-193

102

106

102

1011

107

Iridium

Ir-190

1

106

10

1010

107

Ir-192

1

104

10

1010

105

Ir-194

102

105

102

1011

106

Platinum

Pt-191

10

106

102

1011

107

Pt-193m

103

107

103

1012

108

Pt-197

10

106

103

1012

107

Pt-197m

102

106

102

1014

107

Gold

Au-198

10

106

102

1011

107

Au-199

102

106

102

1011

107

Mercury

Hg-197

102

107

102

1012

108

Hg-197m

102

106

102

1012

107

Hg-203

10

105

102

1011

106

Thallium

Tl-200

10

106

10

1011

107

Tl-201

102

106

102

1012

107

Tl-202

10

106

102

1011

107

Tl-204

1

104

104

1011

105

Lead

Pb-203

10

106

102

1012

107

Pb-210+

0.01

104

10

108

105

Pb-212+

1

105

10

1010

106

Bismuth

Bi-206

1

105

10

1010

106

Bi-207

0.1

106

10

1010

107

Bi-210

10

106

103

109

107

Bi-212+

1

105

10

1011

106

Polonium

Po-203

10

106

10

1013

107

Po-205

10

106

10

1012

107

Po-207

10

106

10

1012

107

Po-210

0.01

104

10

107

105

Astatine

At-211

103

107

103

1010

108

Radon

Rn-220+

0.01

107

104

108

108

Rn-222+

0.01

108

10

109

109

Radium

Ra-223+

1

105

102

107

106

Ra-224+

1

105

10

108

106

Ra-225

10

105

102

107

106

Ra-226+

0.01

104

10

107

105

Ra-227

102

106

102

1013

107

Ra-228+

0.01

105

10

108

106

Actinium

Ac-228

1

106

10

1010

107

Thorium

Th-226+

103

107

103

1011

108

Th-227

1

104

10

107

105

Th-228+

0.1

104

1

106

105

Th-229+

0.1

103

1

106

104

Th-230

0.1

104

1

106

105

Th-231

102

107

103

1012

108

Th-232

0.01

104

10

106

105

Th-234+

10

105

103

1010

106

Protactinium

Pa-230

10

106

10

108

107

Pa-231

0.01

103

1

106

104

Pa-233

10

107

102

1010

108

Uranium

U-230+

10

105

10

107

106

U-231

102

107

102

1011

108

U-232+

0.1

103

1

106

104

U-233

1

104

10

107

105

U-234

1

104

10

107

105

U-235+

1

104

10

107

105

U-236

10

104

10

107

105

U-237

102

106

102

1011

107

U-238+

1

104

10

107

105

U-239

102

106

102

1014

107

U-240

0.01

107

103

1012

108

U-240+

102

106

10

1011

107

Neptunium

Np-237+

1

103

1

107

104

Np-239

102

107

102

1011

108

Np-240

10

106

10

1013

107

Plutonium

Pu-234

102

107

102

1010

108

Pu-235

102

107

102

1014

108

Pu-236

1

104

10

107

105

Pu-237

102

107

103

1011

108

Pu-238

0.1

104

1

106

105

Pu-239

0.1

104

1

106

105

Pu-240

0.1

103

1

106

104

Pu-241

10

105

102

108

106

Pu-242

0.1

104

1

106

105

Pu-243

103

107

103

1013

108

Pu-244+

0.1

104

1

106

105

Americium

Am-241

0.1

104

1

106

105

Am-242

103

106

103

1010

107

Am-242m+

0.1

104

1

106

105

Am-243+

0.1

103

1

106

104

Curium

Cm-242

10

105

102

107

106

Cm-243

1

104

1

107

105

Cm-244

1

104

10

107

105

Cm-245

0.1

103

1

106

104

Cm-246

0.1

103

1

106

104

Cm-247+

0.1

104

1

106

105

Cm-248

0.1

103

1

106

104

Berkelium

Bk-249

102

106

103

109

107

Californium

Cf-246

103

106

103

109

107

Cf-248

1

104

10

107

105

Cf-249

0.1

103

1

106

104

Cf-250

1

104

10

106

105

Cf-251

0.1

103

1

106

104

Cf-252

1

104

10

107

105

Cf-253

102

105

102

108

106

Cf-254

1

103

1

107

104

Einsteinium

Es-253

102

105

102

108

106

Es-254+

0.1

104

10

107

105

Es-254m+

10

106

102

109

107

Fermium

Fm-254

104

107

104

1010

108

Fm-255

102

106

103

109

107

Other radionuclides not listed above (see Note 1)

0.01

103

0.1

105

104

Note 1

In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.

Note 2

Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).

1 Potassium salts in quantities less than 1,000kg are exempt.

List of parent nuclides and their progeny as referred to in Note 2 above

Parent radionuclide

Progeny

Fe-52

Mn-52m

Zn-69m

Zn-69

Ge-68

Ga-68

Sr-90

Y-90

Sr-91

Y-91m

Zr-93

Nb-93m

Zr-95

Nb-95

Zr-97

Nb-97m, Nb-97

Nb-97

Nb-97m

Mo-99

Tc-99m

Mo-101

Tc-101

Ru-103

Rh-103m

Ru-105

Rh-105m

Ru-106

Rh-106

Pd-103

Rh-103m

Pd-109

Ag-109m

Ag-108m

Ag-108

Ag-110m

Ag-110

Cd-109

Ag-109m

Cd-115

In-115m

Cd-115m

In-115m

In-114m

In-114

Sn-113

In-113m

Sb-125

Te-125m

Te-127m

Te-127

Te-129m

Te-129

Te-131m

Te-131

Te-132

I-132

Cs-137

Ba-137m

Ba-140

La-140

Ce-144

Pr-144, Pr-144m

Pb-210

Bi-210, Po-210

Pb-212

Bi-212, Tl-208, Po-212

Bi-212

Tl-208, Po-212

Rn-220

Po-216

Rn-222

Po-218, Pb-214, Bi-214, Po-214

Ra-223

Rn-219, Po-215, Pb-211, Bi-211, Tl-207

Ra-224

Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212

Ra-226

Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210

Ra-228

Ac-228

Th-226

Ra-222, Rn-218, Po-214

Th-228

Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212

Th-229

Ra-225, Ac-225, Fr-221, At-217, Bi-213, Po-213, Pb-209

Th-234

Pa-234m

U-230

Th-226, Ra-222, Rn-218, Po-214

U-232

Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212

U-235

Th-231

U-238

Th-234, Pa-234m

U-240

Np-240m, Np-240

Np-237

Pa-233

Pu-244

U-240, Np-240m, Np-240

Am-242m

Am-242, Np-238

Am-243

Np-239

Cm-247

Pu-243

Es-254

Bk-250

Es-254m

Fm-254

PART 2Table of naturally occurring radionuclides (which are not processed for their radioactive, fissile or fertile properties)

Regulations 2(4), 6(2)and Schedule 1

Values for exemption from notification and registration for naturally occurring radionuclides in solid materials (which are not processed for their radioactive, fissile or fertile properties), which apply whether or not the radionuclide is in secular equilibrium with its progeny

1

2

3

4

Radionuclide name, symbol, isotope

Concentration for: Notification (any amount of radioactive material); Registration (amounts of radioactive material that exceed 1,000kg)

Quantity for Notification

Concentration for Registration (amounts of radioactive material that do not exceed 1,000kg)

Regulation 5(1) and Schedule 1, paragraph 1(a); regulation 6(2)(f)

Regulation 5(1) and Schedule 1, paragraph 1(b)

Regulation 6(2)(e)

(Bq/g)

(Bq)

(Bq/g)

K-401

10

106

102

Rb-87

1

107

104

Pb-210+

1

104

10

Po-210

1

104

10

Ra-226+

1

104

10

Ra-228+

1

105

10

Th-228+

1

104

1

Th-232 sec

1

103

1

U-238 sec

1

103

1

Note

Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions of those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).

1 Potassium salts in quantities less than 1,000kg are exempt.

List of parent nuclides and their progeny as referred to in the Note above

Parent radionuclide

Progeny

Pb-210

Bi-210, Po-210

Ra-226

Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210

Ra-228

Ac-228

Th-228

Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212

PART 3Quantity and concentration ratios for more than one radionuclide

Regulation 2(4)

1.

For the purpose of Regulation 2(4)—

(a)

the quantity ratio for more than one radionuclide is the sum of the quotients of the quantity of a radionuclide present Qp divided by the quantity of that radionuclide specified in the appropriate entry in Parts 1, 2 or 4 of this Schedule Qlim, namely—

(b)

the concentration ratio for more than one radionuclide is the sum of the quotients of the concentration of a radionuclide present Cp divided by the concentration of that radionuclide specified in the appropriate entry in Parts 1 or 2 of this Schedule Clim, namely—

2.

In any case where the isotopic composition of a radioactive substance is not known or is only partially known, the quantity or concentration ratio for that substance is to be calculated by using the values specified in the appropriate column in Part 1 of this Schedule for “other radionuclides not listed above” for any radionuclide that has not been identified or where the quantity or concentration of a radionuclide is uncertain, unless the employer can show that the use of some other value is appropriate in the circumstances of a particular case, when the employer may use that value.

PART 4Table of quantities of radioactive material defining high-activity sealed sources

Regulations 2(1) and 2(4)

For radionuclides not listed in the table below, the relevant quantity value is the same as the D-value defined in section 2 Table 1 of the IAEA publication: Dangerous quantities of radioactive material (D-values), (EPR-D-VALUES 2006)

Radionuclide

Quantity (Bq)

Co-60

3 × 1010

Se-75

2 × 1011

Sr-90 (Y-90)

1 × 1012

Cs-137

1 × 1011

Pm-147

4 × 1013

Gd-153

1 × 1012

Tm-170

2 × 1013

Yb-169

3 × 1011

Ir-192

8 × 1010

Ra-226

4 × 1010

Pu-238

6 × 1010

Pu-239/Be-91

6 × 1010

Am-241

6 × 1010

Am-241/Be-91

6 × 1010

Cm-244

5 × 1010

Cf-252

2 × 1010

1 The activity given is that of the alpha-emitting radionuclide.