This standard is only applicable to adults exposed to X-ray and γ-ray external radiation, and is not applicable to local radiation and large-dose accidental radiation. GB/T 11712-1989 Dose conversion factors for radiation protection against external radiation exposure to χ and γ-rays GB/T11712-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Dase conversion factors for use inprotection against X, y-ray external radiation1 Subject content and applicable scope
GB 11712 89
1.1 The basic limit values ​​of radiation protection (effective dose equivalent and organ dose equivalent) cannot be measured directly, so measurable "application amounts" should be used in monitoring. The conversion factors provided in this standard can be used to estimate the organ dose equivalent and effective dose equivalent of radiation workers. 1.2 This standard is only applicable to adults exposed to X, y-ray external radiation, and is not applicable to local exposure and large-dose accidental exposure. 2. Language and code
2.1 Weakly penetrating radiation and strongly penetrating radiation In a uniform, unidirectional ionizing radiation field, for a given human orientation, if the dose equivalent received by any small area of ​​the sensitive layer of the skin is more than 10 times greater than the effective dose equivalent, then this radiation is called weakly penetrating radiation; if the ratio of the dose equivalent received by the small area of ​​skin to the effective dose equivalent is less than 10, then this radiation is called strongly penetrating radiation. 2.2 ICRU sphere
ICRU sphere is a tissue equivalent phantom with a diameter of 30cm and a density of 1g·cm-\. The mass ratio of its components is: O: 76.2%, C: I1. 1%, H: 10. 1%, N: 2. 6%.
2.3 Expanded field
The expanded field is a hypothetical radiation field derived from the actual auxiliary field. The flux, angular distribution and energy spectrum distribution in the expanded field are all alternating with the values ​​of the actual radiation field at the reference point.
2.4 Aligned anei expanded field The flux and energy spectrum distribution are the same as those of the expanded field, but the flux is single. 2.5 Ambient dose equivalent (ADE) \ (d) The ambient dose equivalent at a point in the radiation distribution is the dose equivalent produced by the corresponding radial extension field at a radius opposite to the radial extension field and at a depth of d in the ICRU sphere. Unit name: Sievert, symbol: SV, d = 10 mm is recommended, H(a) is written as II\ (10) b. Instruments with isotropic response and calibrated according to this definition can be used to measure ambient dose equivalent (requires that the radiation field is uniform within the probe range).
According to the definition of ambient dose equivalent, the instrument design should take into account the influence of backscatter. d. Ambient dose is most suitable for monitoring strong penetrating radiation in the environment and at places. 2.6 Directional dose equivalent (directional dose equivalent) H! (d) Directed dose at a point in the radiation field is the dose produced by the corresponding extended field in the ICRU sphere, on a radius in a specified direction, at a depth of .
Approved by the Ministry of Health of the People's Republic of China on September 21, 1989 and implemented on July 1, 1990
Unit name: Heywater, symbol: SV.
GB1171289
Recommend d = 0.07mm, H (d) is written as 10.07). b. Directed dose is often used to monitor weak penetrating radiation in the environment and at places. 27 Penetrating individual dose equivalent (penetrating), H, (d) Penetrating individual dose equivalent is the dose equivalent to soft tissue at a certain position on the human body and at a depth of . Unit name: Heywater 1. Symbol: SV. a Recommended d = 10 mm, H, (d) H, (10). b. The penetrating personal dose equivalent meter worn on the human body and covered with tissue equivalent material (or substitute) of appropriate thickness can be used to measure the penetrating personal dose equivalent meter
c. The penetrating personal dose equivalent meter worn on the human body can be calibrated with the ICRII ball as a phantom. d. The penetrating personal dose equivalent is used for personal dose equivalent monitoring in a strong penetrating radiation field. 2.8 Superficial personal dose equivalent (a) Superficial personal dose equivalent is the dose equivalent of soft tissue at a certain position on the body and a depth of 4. Unit name: Sievert, symbol: Sv. A recommended ±—0. 07 mm, (t) is written as H, (0.07). b. The superficial personal dose equivalent can be measured by a detector worn on the surface of the human body and replaced by a textile equivalent material (or substitute) of appropriate thickness.
c. For the calculation of superficial personal dose equivalent worn on the human body, the ICRU ball can be used as a phantom for calibration. d. Superficial personal dose equivalent is used to monitor personal skin dose equivalent in weak penetrating radiation fields. e. Under most irradiation conditions, when the effective dose equivalent and personal skin dose equivalent do not exceed the limit of the protection standard, the dose equivalent of the lens of the eye will generally not exceed the limit. However, it may be necessary to measure the dose equivalent of the lens of the eye. In this case, ±-3mm should be taken to monitor H. (3).
2.9 Surrogacy of irradiation geometry conditions
2..1 Anteronosterior irradiation, AP2.9. 2 Posterior-antero irradiation, PA2.9.3 Lateral irradiation, PA2.9.4 Lateral irradiation, PA2.9.5 iradiation), LAT2.9. 4 rotational irradiation, ROT2.9.5 isotropic irradiatian, ISO2.9.6 parallel beam irradiation, PAR2. 9.7 point source, PS3x, Y line external radiation radiation protection application amount3.1 external radiation radiation protection monitoring application amount right peripheral dose scene scene, directional dose equivalent, penetrating and superficial personal dose equivalent and specific release kerma and absorbent base, etc.
3.2 In principle, the effective dose equivalent should be given for the results of radiation protection monitoring, but it is not required that all measurement periods be converted into effective dose equivalent. If the application amount used does not underestimate or overestimate, it can be used directly. 3.3 When the annual dose equivalent does not exceed one-third of the annual limit, the monitoring results expressed in application amount can be directly regarded as the effective dose equivalent. When the monitoring result exceeds one third of the annual limit value to less than 1: of the annual limit value, and when it is really necessary, it can be converted into an effective dose equivalent: for human exposure, such as emergency exposure or planned exposure (when it may reach 100mSv), it should be converted into an effective dose equivalent according to the radiation conditions.
3.4 ​​Application of environmental and site monitoring
3.4.1 The ambient dose equivalent and the fixed dose equivalent can be used as the application of environmental and site monitoring, but it is used to understand the environmental radiation field and the expected exposure that may be received here rather than to give a personal dose equivalent. GB11712-89
3.4.2 The relationship between the ambient dose equivalent H*(10) and the air kerma K. is shown in formula (1) (the applicable energy range is 10 keV~10Mev).
H*(10)/R.(Sv/Gy) = [X/(ax2 + br + c)) +d *arctan(ga) where: =1n(/E), E=9.85keV;
a -1. 465,
6 = 4. 414;
0 =4. 789;
d=0.7006;
The angle unit is radian (rad), and is the X-ray energy (keV). 3.4.3 The relationship between the directional dose equivalent and the air kerma is as shown in formula (2) (the applicable energy range is 10250keV). [H'(0.07,a = 0°)J/K,(Sv/Gy) a +br + cr -exp(gr3) where: -n(E/Eo),E=9.85keV,
6=0.09432;
C -0.2302;
d -5.082,
9--0.6997
The angle unit is rad: to is the X,r line energy (keV) -0 represents the point of directional dose equivalent and is the application amount of 3.5 personal dose equivalent monitoring on the radius opposite to the incident parallel beam
.-(2)
For monitoring personal dose equivalent of weak penetrating radiation, superficial personal dose equivalent can be used, and for monitoring strong penetrating radiation, penetrating personal dose equivalent can be used.
3.6 The conversion factors L Appendix A (Supplement) between the relevant radiation protection quantities given in this standard are only relatively accurate under the specified irradiation conditions. For irradiation close to or greater than the limit, the irradiation case should be recorded as detailed as possible. 3.7 The data proposed in Appendix ^ are the recommended values ​​provided by the current international radiation protection field, which are not unchangeable. Appendix B (Reference) is a reference debt. Three significant figures are generally given in the table. In this list, it does not represent its accuracy, but is for the convenience of calculation. GB 11712-89
Appendix A
Data on the relationship between dose equivalents
(supplement)
A1The ratio of the X, Y line directional dose disk equivalent H (0.07) and the ambient dose equivalent H* (10) to the air kerma is shown in Table A1. The data in the table can be calculated from 3.4.2 and 3.4.3.
Table A1The ratio of the X, Y line directional dose equivalent and the peripheral dose equivalent to the air kerma kev
R(0.07)/K
GB 11712-89
The ratio of the X, Y line effective dose equivalent to the ambient dose equivalent H\ (10) is shown in Table A2. The effective dose equivalent and the ambient dose equivalent are based on the data calculated by irradiating the human-shaped model and the ICRU sphere with parallel rays A2
In the table, 1.0F.2 equals 1.0×10-2. Table A2 The ratio of the effective dose equivalent of x and Y lines to the peripheral dose equivalent Mev
.1,OE—2
3. DE—2
6. 0E—2
1, 5t:--1
3. 0F—1
GB11712- 89
A3 The ratio of the skin dose equivalent of x and Y lines (0.07mm depth dose equivalent below the skin surface) to the directional dose equivalent disk (0.07) is shown in Table A3. The skin dose equivalent is calculated based on the human body model, and the directional dose equivalent is calculated based on the ICRU sphere. In the table, 1, OE-2 is 1.0×10-2
Table A3 The ratio of the skin dose equivalent of x and Y lines to the directional dose disk equivalent Mev
1. 5E—2
4. OE—2
5. 0F—2
1, 0E1
1. 5E—1
5. 0E -- 1
6, 0E-1
6: 0E0
GB11712—89
The air absorbed dose per unit X-ray dose in free air is shown in Table A4. In the table, 1.0E-2, that is, 1.0×10-rTable A4 The air absorbed dose per unit X, line fluence in free air Mev
2. 0E—2
3. 0E—2
4. 0E—2
5. OE— 2
1. 5E —1
2. 0E—1
3, 0E—1
Conversion system
10zGy cm
GE11712—B9
5 The effective dose equivalent of unit X, line fluence of the human phantom under various light FPAR irradiation conditions is shown in Table A5. In the table, 1.0EA5
2 is 1. 0 × 10-2
Unit X, effective dose equivalent of line injection
Conversion coefficient
1. OE—2
2. 0E—2
3. 0E— 2
4. 0E—2
5, OE—2
6. 0E—2
8, 0F—2
1. 0E—1
6. 0E—1
B. OE—1
10-\Sv·cm2
GB11712
A6 The effective dose equivalent of unit air absorption dose (in free air) of the human-shaped phantom under various XY ray irradiation conditions is shown in Table A6. The air absorption dose in free air is taken at a point 1m above the ground vertically along the longitudinal axis of the human-shaped phantom, and ground scattering is not considered. When the unit air absorption dose is expressed in unit exposure (roentgen), the conversion coefficient in this table should be multiplied by 0.873, and the unit is 10-2Sv·R-1. 1.0×10-3 in the table.
Table A6 Effective dose equivalent conversion coefficient of unit air absorption dose for human phantom under various X-ray irradiation conditions
K. 0E—2
3. 0E -- 1
4. 0E—1
6. 0E—1
6. 0E - 1
.........
... .. :....
GB117128
7PARX, irradiated ICRU sphere, the dose equivalent at three depths on its main axis caused by unit air absorption scattering (in whiteout air) is shown in Table A7. 1.0E—3 in the table is equal to 1.0×10-2 Table A7 Dose equivalent conversion coefficient at ICRU sphere depth due to unit air absorbed dose
2, 0F—2
3. 0E—2
2. OE—1
8. OF:—1
GB 1171289
The ratio of organ dose equivalent to air kerma K in white air is shown in Table A8. In the table, except for ISO, PAR conditions are used instead, and LAT means irradiation from the left side.
Organ dose equivalent and air kermatic energy K, ratio
Red bone marrow
Thyroid
Bone surface
Heart232
0, 218
0, 604
0, 911
Radio conditions
Other tissues
Whole body\
0: 050
GR 11712
Continued Table A8
Note, 1 For the whole body, it should be the ratio of effective dose equivalent to air kermatic energy,. Appendix B
Correction for point source and oblique irradiation
(set of test pieces)
Irradiation conditions
B1: The correction values ​​for the conversion coefficients of the effective dose equivalent of the parallel beam to the absorbed dose or injection in free air under the conditions of 10 keV to 10 MeV point source diffuse beam are shown in Table B1. This correction value instrument gives the conditions of source distance (from the ground) 0, 1, 1.5 m and source to skin 0.5, 1.5, 2.5 m. These correction values ​​are approximate (possibly the maximum) values ​​and cannot be used for PA conditions. Table B1 Point source correction valueswwW.bzxz.Net
Source-skin distance
When the parallel wide beam monoenergetic X-ray, ?-ray is obliquely irradiated on the human phantom at different angles above or below the horizontal, the dose correction coefficients are shown in Table B2.820F—1
GB11712- 89
A3The ratio of the skin dose equivalent of X and Y lines (dose volume equivalent at a depth of 0.07mm below the skin surface) to the directional dose equivalent disk (0.07) is shown in Table A3. The skin dose equivalent is calculated based on the human body model, and the directional dose equivalent is calculated based on the ICRU sphere. In the table, 1, OE-2, that is, 1.0×10-2
Table A3The ratio of the skin dose equivalent of X and Y lines to the directional dose disk equivalent Mev
1. 5E—2
4. OE—2
5. 0F—2
1, 0E1
1. 5E—1
5. 0E -- 1
6, 0E-1
6: 0E0
GB11712—89
The air absorbed dose per unit X, line fluence in free air is shown in Table A4. In the table, 1.0E-2, i.e. 1.0×10-rTable A4The air absorbed dose per unit X, line fluence in free air is Mev
2. 0E—2
3. 0E—2
4. 0E—2
5. OE— 2
1. 5E —1
2. 0E—1
3, 0E—1
Conversion system
10zGy cm
GE11712—B9
5The effective dose equivalent per unit X, line fluence of the human-shaped phantom under various light FPAR irradiation conditions is shown in Table A5. In the table, 1.0EA5
2 is 1. 0 × 10-2
Unit X, effective dose equivalent of line injection
Conversion coefficient
1. OE—2
2. 0E—2
3. 0E— 2
4. 0E—2
5, OE—2
6. 0E—2
8, 0F—2
1. 0E—1
6. 0E—1
B. OE—1
10-\Sv·cm2
GB11712
A6 The effective dose equivalent of unit air absorption dose (in free air) of the human-shaped phantom under various XY ray irradiation conditions is shown in Table A6. The air absorption dose in free air is taken at a point 1m above the ground vertically along the longitudinal axis of the human-shaped phantom, and ground scattering is not considered. When the unit air absorption dose is expressed in unit exposure (roentgen), the conversion coefficient in this table should be multiplied by 0.873, and the unit is 10-2Sv·R-1. 1.0×10-3 in the table.
Table A6 Effective dose equivalent conversion coefficient of unit air absorption dose for human phantom under various X-ray irradiation conditions
K. 0E—2
3. 0E -- 1
4. 0E—1
6. 0E—1
6. 0E - 1
.........
... .. :....
GB117128
7PARX, irradiated ICRU sphere, the dose equivalent at three depths on its main axis caused by unit air absorption scattering (in whiteout air) is shown in Table A7. 1.0E—3 in the table is equal to 1.0×10-2 Table A7 Dose equivalent conversion coefficient at ICRU sphere depth due to unit air absorbed dose
2, 0F—2
3. 0E—2
2. OE—1
8. OF:—1
GB 1171289
The ratio of organ dose equivalent to air kerma K in white air is shown in Table A8. In the table, except for ISO, PAR conditions are used instead, and LAT means irradiation from the left side.
Organ dose equivalent and air kermatic energy K, ratio
Red bone marrow
Thyroid
Bone surface
Heart232
0, 218
0, 604
0, 911
Radio conditions
Other tissues
Whole body\
0: 050
GR 11712
Continued Table A8
Note, 1 For the whole body, it should be the ratio of effective dose equivalent to air kermatic energy,. Appendix B
Correction for point source and oblique irradiation
(set of test pieces)
Irradiation conditions
B1: The correction values ​​for the conversion coefficients of the effective dose equivalent of the parallel beam to the absorbed dose or injection in free air under the conditions of 10 keV to 10 MeV point source diffuse beam are shown in Table B1. This correction value instrument gives the conditions of source distance (from the ground) 0, 1, 1.5 m and source to skin 0.5, 1.5, 2.5 m. These correction values ​​are approximate (possibly the maximum) values ​​and cannot be used for PA conditions. Table B1 Point source correction values
Source-skin distance
When the parallel wide beam monoenergetic X-ray, ?-ray is obliquely irradiated on the human phantom at different angles above or below the horizontal, the dose correction coefficients are shown in Table B2.820F—1
GB11712- 89
A3The ratio of the skin dose equivalent of X and Y lines (dose volume equivalent at a depth of 0.07mm below the skin surface) to the directional dose equivalent disk (0.07) is shown in Table A3. The skin dose equivalent is calculated based on the human body model, and the directional dose equivalent is calculated based on the ICRU sphere. In the table, 1, OE-2, that is, 1.0×10-2
Table A3The ratio of the skin dose equivalent of X and Y lines to the directional dose disk equivalent Mev
1. 5E—2
4. OE—2
5. 0F—2
1, 0E1
1. 5E—1
5. 0E -- 1
6, 0E-1
6: 0E0
GB11712—89
The air absorbed dose per unit X, line fluence in free air is shown in Table A4. In the table, 1.0E-2, i.e. 1.0×10-rTable A4The air absorbed dose per unit X, line fluence in free air is Mev
2. 0E—2
3. 0E—2
4. 0E—2
5. OE— 2
1. 5E —1
2. 0E—1
3, 0E—1
Conversion system
10zGy cm
GE11712—B9
5The effective dose equivalent per unit X, line fluence of the human-shaped phantom under various light FPAR irradiation conditions is shown in Table A5. In the table, 1.0EA5
2 is 1. 0 × 10-2
Unit X, effective dose equivalent of line injection
Conversion coefficient
1. OE—2
2. 0E—2
3. 0E— 2
4. 0E—2
5, OE—2
6. 0E—2
8, 0F—2
1. 0E—1
6. 0E—1
B. OE—1
10-\Sv·cm2
GB11712
A6 The effective dose equivalent of unit air absorption dose (in free air) of the human-shaped phantom under various XY ray irradiation conditions is shown in Table A6. The air absorption dose in free air is taken at a point 1m above the ground vertically along the longitudinal axis of the human-shaped phantom, and ground scattering is not considered. When the unit air absorption dose is expressed in unit exposure (roentgen), the conversion coefficient in this table should be multiplied by 0.873, and the unit is 10-2Sv·R-1. 1.0×10-3 in the table.
Table A6 Effective dose equivalent conversion coefficient of unit air absorption dose for human phantom under various X-ray irradiation conditions
K. 0E—2
3. 0E -- 1
4. 0E—1
6. 0E—1
6. 0E - 1
.........
... .. :....
GB117128
7PARX, irradiated ICRU sphere, the dose equivalent at three depths on its main axis caused by unit air absorption scattering (in whiteout air) is shown in Table A7. 1.0E—3 in the table is equal to 1.0×10-2 Table A7 Dose equivalent conversion coefficient at ICRU sphere depth due to unit air absorbed dose
2, 0F—2
3. 0E—2
2. OE—1
8. OF:—1
GB 1171289
The ratio of organ dose equivalent to air kerma K in white air is shown in Table A8. In the table, except for ISO, PAR conditions are used instead, and LAT means irradiation from the left side.
Organ dose equivalent and air kermatic energy K, ratio
Red bone marrow
Thyroid
Bone surface
Heart232
0, 218
0, 604
0, 911
Radio conditions
Other tissues
Whole body\
0: 050
GR 11712
Continued Table A8
Note, 1 For the whole body, it should be the ratio of effective dose equivalent to air kermatic energy,. Appendix B
Correction for point source and oblique irradiation
(set of test pieces)
Irradiation conditions
B1: The correction values ​​for the conversion coefficients of the effective dose equivalent of the parallel beam to the absorbed dose or injection in free air under the conditions of 10 keV to 10 MeV point source diffuse beam are shown in Table B1. This correction value instrument gives the conditions of source distance (from the ground) 0, 1, 1.5 m and source to skin 0.5, 1.5, 2.5 m. These correction values ​​are approximate (possibly the maximum) values ​​and cannot be used for PA conditions. Table B1 Point source correction values
Source-skin distance
When the parallel wide beam monoenergetic X-ray, ?-ray is obliquely irradiated on the human phantom at different angles above or below the horizontal, the dose correction coefficients are shown in Table B2.82—1
GB 1171289
The ratio of organ dose equivalent to air kerma K, in white air, see Table A8. In the table, except ISO, it is replaced by PAR conditions, and LAT is irradiated from the left side.
Ratio of organ dose equivalent to air kerma K,
Red bone marrow
Thyroid
Bone surface
Heart232
0, 218
0, 604
0, 911
Radiation conditions
Other tissues
Whole body\
0: 050
GR 11712
Continued Table A8
Note, 1 For the whole body, it should be the ratio of effective dose equivalent to air kerma K,. Appendix B
Correction for point source and oblique irradiation
(set of test pieces)
Irradiation conditions
B1: The correction values ​​for the conversion coefficients of the effective dose equivalent of the parallel beam to the absorbed dose or injection in free air under the conditions of 10 keV to 10 MeV point source diffuse beam are shown in Table B1. This correction value instrument gives the conditions of source distance (from the ground) 0, 1, 1.5 m and source to skin 0.5, 1.5, 2.5 m. These correction values ​​are approximate (possibly the maximum) values ​​and cannot be used for PA conditions. Table B1 Point source correction values
Source-skin distance
When the parallel wide beam monoenergetic X-ray, ?-ray is obliquely irradiated on the human phantom at different angles above or below the horizontal, the dose correction coefficients are shown in Table B2.82—1
GB 1171289
The ratio of organ dose equivalent to air kerma K, in white air, see Table A8. In the table, except ISO, it is replaced by PAR conditions, and LAT is irradiated from the left side.
Ratio of organ dose equivalent to air kerma K,
Red bone marrow
Thyroid
Bone surface
Heart232
0, 218
0, 604
0, 911
Radiation conditions
Other tissues
Whole body\
0: 050
GR 11712
Continued Table A8
Note, 1 For the whole body, it should be the ratio of effective dose equivalent to air kerma K,. Appendix B
Correction for point source and oblique irradiation
(set of test pieces)
Irradiation conditions
B1: The correction values ​​for the conversion coefficients of the effective dose equivalent of the parallel beam to the absorbed dose or injection in free air under the conditions of 10 keV to 10 MeV point source diffuse beam are shown in Table B1. This correction value instrument gives the conditions of source distance (from the ground) 0, 1, 1.5 m and source to skin 0.5, 1.5, 2.5 m. These correction values ​​are approximate (possibly the maximum) values ​​and cannot be used for PA conditions. Table B1 Point source correction values
Source-skin distance
When the parallel wide beam monoenergetic X-ray, ?-ray is obliquely irradiated on the human phantom at different angles above or below the horizontal, the dose correction coefficients are shown in Table B2.82
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