ICRP Publication 30, Part 1, 1979

ICRP Publication 30, Part 1, 1979

120 REPORT OF COMMITTEE 2 ADDENDUM ICRP Publication 30, Part 1,1979 The following lines of text are amended as shown: Page 37, line 4 from the bott...

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120

REPORT OF COMMITTEE 2

ADDENDUM ICRP Publication 30, Part 1,1979

The following lines of text are amended as shown: Page 37, line 4 from the bottom: >0.006 Page 38, line 3: O.O06
(not 2

)

(not C)

Page 50, line 11 from the bottom and the last line: (Sv m3 Bq-r h-‘)

(not m-‘)

The figures 5.1 and 5.2 published on pages 24 and 25 of ICRP Publication 30 are amended as follows: 0

0-

r

1

5-

2-

f_

‘5

)2.

-

i

: ‘\ \I

3’1

--+

0

ill\!,

20

30

Percent

\ \ \ 50

70

,

I

I

80

90

95

I

9’9

deeesltlon

Fig. 5.1. Deposition of dust in the respiratory system. The percentage of activity or mass of an aerosol which is deposited in the N-P, T-B and P regions is given in relation to the Activity Median Aerodynamic Diameter (AMAD) of the aerosol distribution. The model is intended for use with aerosol distributions with AMADS between 0.2 and IO pm and wrth geometric standard deviations of less than 4.5. Provisional estimates of deposition further extending the size range are given by the dashed lines. For an unusual distribution with an AMAD of greater than 20 l&m, complete deposition in N-P can be assumed. The model dots not apply to aerosols with AMADs of less than 0.1 pm.

LIMITS

FOR INTAKES

OF RADIONUCLIDES



Class D

Region

Compartment

W

T day

F

T day

Y T day

F

P

N-P (&q-P = 0.30)

a b

0.01 0.01

0.5 0.5

0.01 0.40

0.1 0.9

0.01 0.40

0.01 0.99

T-B (Dr.+=

C

0.01

d

0.2

0.95 0.05

0.01 0.2

0.5 0.5

0.01 0.2

0.01 0.99

e f g h

0.5 n.a. n.a. 0.5

0.8 n.a. n.a. 0.2

50 1.0 50 50

0.15 0.4 0.4 0.05

i

0.5 n.a.

I.0 n.a.

50 n.a.

I.0 n.a.

P (D,

0.08)

= 0.25)

L

j

121

BY WORKERS

500 1.0 500 500

0.05 0.4 0.4 0.15

1000 cc

Lymph nodes

Fig. 5.2. Mathematical model used to describe clearance from the respiratory system. The values for the removal half-times, r,_, and compartmental fractions, F.-r are given in the tabular portion of the figure for each of the three classes of retained materials. The values given for D N4, Dr_sand D, (left column) are the regional depositions for an aerosol with an AMAD of I pm. The schematic drawing identifies the various clearance pathways from compartments a-i in the four respiratory regions, N-P, T-B, P and L. n.a. ~ not applicable.

Page 76 of Part 1 and pages 54 and 55 of its Supplement: As a consequence of the Commission’s decision to reduce its recommended dose equivalent limit for the lens of the eye from 0.3 Sv to 0.15 Sv in a year, values of DAC for *’ Kr and *““Kr are amended as follows. Derived air concentrations DAC(Rq m-‘)

Radionuclide “Kr

83mKr

Semi-infinite cloud 2 x 10’

4x lo8 (7 x 109) Lens

(40 h wk) for isotopes of krypton

1 000 m3 room

500 m3 room

100 m3 room

1x 108 (5 x 108) Lens 4x lo8 (7 x 109) Lens

1 x 108 (6 x 10’) Lens 4x10s (7 x 109) Lens

lx108 (9 x 108) Lens 4x10” (8 x 10’) Lens

Page 78, The values of ALI and DAC for *‘Sr are incorrect because no allowance was made for the contribution to committed dose equivalent of *‘Rb, the daughter of *‘Sr. The corrected dosimetric data are given in Supplement B of Part 3. The correct values of AL1 and DAC are given below:

122

REPORT OF COMMITTEE 2

Annual limits on intake, ALI

and derived air concentrations, DAC(Rq me3) (40 h wk) for isotopes of strontium Inhalation Oral

Radionuclide

Class D

&=3x10-’

aOSr

AL1 DAC

j-,=1x10-’

2 x 108 -

Class Y

f,=3xlo-’

2x 10s -

~i=lxlo-*

4x10s 2 x 10”

5x108 2 x 10’

Page 82, The values of AL1 and DAC given for g3mNb were calculated using the incorrect assumption that the radionuclide would be distributed uniformly to bone surface rather than throughout mineral bone as stated in the metabolic model. The correct values of AL1 and DAC are given below. Revised tables of dosimetric data are given in Supplement B to Part 3. Annual limits on intake, ALI

and derived air concentrations, DAC(Flq m-‘) (40 h wk) for isotopes of niobium Inhalation Oral f,=lx10-2

Radionuclide 9 ‘“‘Nb

AL1

DAC

3x lo8 (4 x 108) LLI Wall -

Class W fi=lx10-2

Class Y j,=lxlO_*

I x 10’

6x lo6

3x104

3 x 10”

Page 84, In Section 3 it is incorrect to state that none of the radioisotopes of molybdenum considered has a radioactive half-life greater than 3 days. “MO has a half-life of 3.5 x 10’ years and should perhaps be considered to be distributed throughout the volume of mineral bone rather than on its surface following its deposition in the skeleton. Such an assumption will make only a marginal difference to the values of AL1 and DAC quoted.

Page 86, In Section 3 it is incorrect to state that none of the radioisotopes of tellerium considered has a radioactive half-life greater than 200 days. 123Te has a radioactive half-life of 10’ 3 years and should perhaps be considered as a volume rather than a surface seeker of mineral bone. This would have the effect of increasing the values of AL1 shown. However, the mass of the AL1 is so great that lZ3Te will not present a radiation hazard in any practical circumstance.

Page 87, Some of the values of AL1 and DAC shown for radioisotopes of tellurium are incorrect due to a transcription error. The correct values are as follows:

123

LIMITS FOR INTAKES OF RADIONUCLIDES BY WORKERS Annual limits on intake ALI

and derived & concentrations, DAC(Bq m-j) isotopes of tellurium

(40 h wk) for

Inhalation Radionuclide

Class D

Classw

f, =2x 10-l

fi-2x

2x 108 (5 x IOB) Thyroid 8x104

2xW (4X lee) Thyroid 8x1@

(2 x 107) Thyroid

2x 107 (5 x 10’) Thyroid 6x IO3

1x 10’ (3 x IO’) Thyroid 6x10’

8x106 (2 x IO’) Thyroid -

9x106 (3 x 10’) Thyroid 4x103

8x1@ (2 x IO’) Thyroid 3x1@

8x108 (2 x 104 Thyroid 4x 105

8x108 (2x 104 Thyroid 4x105

(2 x 108) Thyroid

2x10s (5x104 Thyroid 8x104

2xW (5x 104 Thyroid 8x10”

6x108 (9X 108) Thyroid -

9x108 (2 x 104 Thyroid 4x105

9x108 (2X 104 Thyroid 4x 105

Oral fi=zx

We

ALI

IO-’

1X1@

(2X I@) Thyroid DAC 13lmTe

AL1

I x IO’

DAC ALI

DAC AL1

5X108 (1X104

Thyroid DAC ALI

IXIOB

DAC ALI

DAC

10-l

Page 88, The second paragraph of Section (c) Distributionand Retention should read as follows: “Of iodine entering the transfer compartment a fraction, 0.3, is assumed to be translocated to the thyroid while the remainder.is assumed to go directly to excretion. Iodine in the thyroid is assumed to be retained with a biological half-lifeof 80 days and to be lost from the gland in the form of organic iodine. Organic iodine is assumed to be uniformly distributed among all organs and tissues of the body other than the thyroid and to be retained there with a biological half-life of 12days. One-tenth of this organic iodine is assumed to go directly to faecal excretion and the rest is assumed to be returned to the transfer compartment as inorganic iodine so that the effective half-life of iodine in the thyroid is 120 days.” Values of AL1 and DAC for radioisotopes of iodine are not changed.

ICRP Publication 30, Part 2,19fM

Page 51, Values of AL1 and DAC for ’ '*Re are incorrect because l ‘*Ta (2.2 h) was incorrectly included in the decay chain instead of I’*Ta (9.31 min). A revised drawing of the decay scheme and tables of dosimetric data will be given in Supplement B to Part 3. The revised values of AL1 and DAC are as follows:

124

REPORT OF COMMITTEE 2 Annual limits on intake, ALI

and derived air concentrations, DAC(Bq m-‘) (40 h wk) for isotopes of rhenium Inhalation Oral

Radionuclide “‘Re

Class D

/,=8x10-’ AL1

f,=8x

3x109 (4 x 109) ST Wall -

DAC

Class w

IO-’

f,=8x

10-l

1 x 10’0

1 x 10’0

4x10”

5 x 106

Page 57, Due to wrong transcription of metabolic data into the computer, small errors have occurred in the values of AL1 and DAC for isotopes of gold. The correct dosimetric data are shown in Supplement B to Part 3 and the correct values of AL1 and DAC are shown below: Annual limits on intake, ALI

and derived air concentrations, DAC(Bq rne3) (40 h wk) for isotopes of gold Inhalation Oral j;=ix10-’

Radionuclide ALI DAC ALI DAC ALI DAC ALI DAC AL1 DAC ALI DAC ALI DAC ALI DAC AL1 DAC

3 x 10” 1 x IO8 2 x 10” 4x10’ 5x 10’ 1x 10” (1 x IO”) LLI Wall 4x10’ 1x IO9 3 x lo9 (3 x 109) ST Wall

ClassD f,=lxlO_’

Classw f,=lxlO_’

ClassY j,=lxlO_’

1 x 109 4x109 3x lon 1 x 109 4x109 2x105 1 x lo8 4x lo4 1x 10” 6x10’ 3x10”

8x10 3 x 10’ 2x 109 8x10’ 5 x 10’ 2x lo4 4x10’ 2x lo4 7 x 10’ 3x104 1 x lo8

lx 109 3 x 10’ 2x lo* 8x lo4 2x 107 7x 10’ 4x 107 2x104 6x 10’ 3x 104 1x 108

1x 10’ 1x lo* 5 x lo4 2 x lo9 1x lo6 8x lo9

6x lo4 1x 10” 4x lo4 3x109 1x lo6 9x lo9

6~10~ 9x107 4x104 3x109 1x 106 8x lo9

3x lo6

4x106

3x 109