Western Australian Current Regulations

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RADIATION SAFETY (GENERAL) REGULATIONS 1983 - SCHEDULE 5

[Regulations 5, 16, 30, 31 and 32]

Exempt quantities of radioactive substances

Item

Radioactive substance

Maximum quantity (megabecquerels)

1

Americium 241 ...........................................................................

0.0004

2

Antimony 122 .............................................................................

4.0

3

Antimony 124 .............................................................................

0.4

4

Antimony 125 .............................................................................

0.4

5

Arsenic 73 ..................................................................................

4.0

6

Arsenic 74 ..................................................................................

0.4

7

Arsenic 76 ..................................................................................

0.4

8

Arsenic 77 ..................................................................................

4.0

9

Barium 131 .................................................................................

0.4

10

Barium 133 .................................................................................

0.4

11

Barium 140 .................................................................................

0.4

12

Bismuth 210 ...............................................................................

0.04

13

Bromine 82 .................................................................................

0.4

14

Cadmium 109 .............................................................................

0.4

15

Cadmium 115m ..........................................................................

0.4

16

Cadmium 115 .............................................................................

4.0

17

Caesium 131 ...............................................................................

40.0

18

Caesium 134m ............................................................................

4.0

19

Caesium 134 ...............................................................................

0.04

20

Caesium 135 ...............................................................................

0.4

21

Caesium 136 ...............................................................................

0.4

22

Caesium 137 ...............................................................................

0.4

23

Calcium 45 .................................................................................

0.4

24

Calcium 47 .................................................................................

0.4

25

Carbon 14 ...................................................................................

4.0

26

Cerium 141 .................................................................................

4.0

27

Cerium 143 .................................................................................

4.0

28

Cerium 144 .................................................................................

0.04

29

Chlorine 36 .................................................................................

0.4

30

Chlorine 38 .................................................................................

0.4

31

Chromium 51 .............................................................................

40.0

32

Cobalt 58m .................................................................................

0.4

33

Cobalt 58 ....................................................................................

0.4

34

Cobalt 60 ....................................................................................

0.04

35

Copper 64 ...................................................................................

4.0

36

Dysprosium 165 .........................................................................

0.4

37

Dysprosium 166 .........................................................................

4.0

38

Erbium 169 .................................................................................

4.0

39

Erbium 171 .................................................................................

4.0

40

Europium 152(9.2h) ...................................................................

4.0

41

Europium 152(13 yr.) .................................................................

0.04

42

Europium 154 .............................................................................

0.04

43

Europium 155 .............................................................................

0.4

44

Fluorine 18 .................................................................................

40.0

45

Gadolinium 153 ..........................................................................

0.4

46

Gadolinium 159 ..........................................................................

4.0

47

Gallium 72 ..................................................................................

0.4

48

Germanium 71 ............................................................................

4.0

49

Gold 198 .....................................................................................

4.0

50

Gold 199 .....................................................................................

4.0

51

Hafnium 181 ...............................................................................

0.4

52

Holmium 166 .............................................................................

4.0

53

Hydrogen 3 .................................................................................

40.0

54

Indium 113m ..............................................................................

4.0

55

Indium 114m .............................................................................

0.4

56

Indium 115m .............................................................................

4.0

57

Indium 115 .................................................................................

0.4

58

Iodine 125 ...................................................................................

0.04

59

Iodine 126 ...................................................................................

0.04

60

Iodine 129 ...................................................................................

0.004

61

Iodine 131 ...................................................................................

0.04

62

Iodine 132 ...................................................................................

0.4

63

Iodine 133 ...................................................................................

0.04

64

Iodine 134 ...................................................................................

0.4

65

Iodine 135 ...................................................................................

0.4

66

Iridium 192 .................................................................................

0.4

67

Iridium 194 .................................................................................

4.0

68

Iron 55 ........................................................................................

4.0

69

Iron 59 ........................................................................................

0.4

70

Krypton 85 .................................................................................

4.0

71

Krypton 87 .................................................................................

0.4

72

Lanthanum 140 ..........................................................................

0.4

73

Lutetium 177 ..............................................................................

4.0

74

Manganese 52 .............................................................................

0.4

75

Manganese 54 .............................................................................

0.4

76

Manganese 56 .............................................................................

0.4

77

Mercury 197m ............................................................................

4.0

78

Mercury 197 ...............................................................................

4.0

79

Mercury 203 ...............................................................................

0.4

80

Molybdenum 99 .........................................................................

4.0

81

Neodymium 147 .........................................................................

4.0

82

Neodymium 149 .........................................................................

4.0

83

Nickel 59 ....................................................................................

4.0

84

Nickel 63 ....................................................................................

0.4

85

Nickel 65 ....................................................................................

4.0

86

Niobium 93m .............................................................................

0.4

87

Niobium 95 .................................................................................

0.4

88

Niobium 97 .................................................................................

0.4

89

Osmium 185 ...............................................................................

0.4

90

Osmium 191m ............................................................................

4.0

91

Osmium 191 ...............................................................................

4.0

92

Osmium 193 ...............................................................................

4.0

93

Palladium 103 .............................................................................

4.0

94

Palladium 109 .............................................................................

4.0

95

Phosphorus 32 ............................................................................

0.4

96

Platinum 191 ..............................................................................

4.0

97

Platinum 193m ...........................................................................

4.0

98

Platinum 193 ..............................................................................

4.0

99

Platinum 197m ...........................................................................

4.0

100

Platinum 197 ..............................................................................

4.0

101

Plutonium 239 ............................................................................

0.0004

102

Polonium 210 .............................................................................

0.004

103

Potassium 42 ..............................................................................

0.4

104

Praseodymium 142 .....................................................................

4.0

105

Praseodymium 143 .....................................................................

4.0

106

Promethium 147 .........................................................................

0.4

107

Promethium 149 .........................................................................

0.4

108

Radium 226 ................................................................................

0.0004

109

Rhenium 186 ..............................................................................

4.0

110

Rhenium 188 ..............................................................................

4.0

111

Rhodium 103m ...........................................................................

4.0

112

Rhodium 105 ..............................................................................

4.0

113

Rubidium 86 ...............................................................................

0.4

114

Rubidium 87 ...............................................................................

0.4

115

Ruthenium 97 .............................................................................

4.0

116

Ruthenium 103 ...........................................................................

0.4

117

Ruthenium 105 ...........................................................................

0.4

118

Ruthenium 106 ...........................................................................

0.04

119

Samarium 151 ............................................................................

0.4

120

Samarium 153 ............................................................................

4.0

121

Scandium 46 ...............................................................................

0.4

122

Scandium 47 ...............................................................................

4.0

123

Scandium 48 ...............................................................................

0.4

124

Selenium 75 ................................................................................

0.4

125

Silicon 31 ...................................................................................

4.0

126

Silver 105 ...................................................................................

0.4

127

Silver 110m ................................................................................

0.04

128

Silver 111 ...................................................................................

4.0

129

Sodium 22 ..................................................................................

0.4

130

Sodium 24 ..................................................................................

0.4

131

Strontium 85 ...............................................................................

0.4

132

Strontium 89 ...............................................................................

0.04

133

Strontium 90 ...............................................................................

0.004

134

Strontium 91 ...............................................................................

0.4

135

Strontium 92 ...............................................................................

0.4

136

Sulphur 35 ..................................................................................

4.0

137

Tantalum 182 .............................................................................

0.4

138

Technetium 96 ............................................................................

0.4

139

Technetium 97m .........................................................................

4.0

140

Technetium 97 ............................................................................

4.0

141

Technetium 99m .........................................................................

4.0

142

Technetium 99 ............................................................................

0.4

143

Tellurium 125m ..........................................................................

0.4

144

Tellurium 127m ..........................................................................

0.4

145

Tellurium 127 .............................................................................

4.0

146

Tellurium 129m ..........................................................................

0.4

147

Tellurium 129 .............................................................................

4.0

148

Tellurium 131m ..........................................................................

0.4

149

Tellurium 132 .............................................................................

0.4

150

Terbium 160 ...............................................................................

0.4

151

Thallium 200 ..............................................................................

4.0

152

Thallium 201 ..............................................................................

4.0

153

Thallium 202 ..............................................................................

4.0

154

Thallium 204 ..............................................................................

0.4

155

Thorium (natural) 1 ......................................................................

4.0

156

Thulium 170 ...............................................................................

0.4

157

Thulium 171 ...............................................................................

0.4

158

Tin 113 .......................................................................................

0.4

159

Tin 125 .......................................................................................

0.4

160

Tungsten 181 ..............................................................................

0.4

161

Tungsten 185 ..............................................................................

0.4

162

Tungsten 187 ..............................................................................

4.0

163

Uranium (natural) 2 ......................................................................

4.0

164

Uranium 233 ...............................................................................

0.0004

165

Uranium 235 ...............................................................................

0.0004

166

Vanadium 48 ...............................................................................

0.4

167

Xenon 131m ................................................................................

40.0

168

Xenon 133....................................................................................

4.0

169

Xenon 135 ...................................................................................

4.0

170

Ytterbium 175 .............................................................................

4.0

171

Yttrium 90 ...................................................................................

0.4

172

Yttrium 91 ...................................................................................

0.4

173

Yttrium 92 ...................................................................................

4.0

174

Yttrium 93 ...................................................................................

4.0

175

Zinc 65 ........................................................................................

0.4

176

Zinc 69m .....................................................................................

4.0

177

Zinc 69 ........................................................................................

40.0

178

Zirconium 93................................................................................

0.4

179

Zirconium 95 ................................................................................

0.4

180

Zirconium 97.................................................................................

0.4


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


0.0004


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


0.004

(See notes at end of this Schedule and Appendix thereto)

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

NOTE:         For purposes of regulations 5(1)(b) and 32(3), 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”). Example : for purposes of regulation 5(1)(b), if a particular combination contains 1 megabecquerel of Au‑198 and 2 megabecquerels of C‑14, it may also include not more than 0.01 megabecquerel of I‑131. This limit was determined as follows:

= 0.25 + 0.5 + 0.25 = 1

        [Schedule V amended: Gazette 22 Jul 1997 p. 3824.]



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