GB 11806-2019Regulations for the safe transport of radioactive material (English PDF)

3.1 Basic radionuclide values

The basic value of radionuclide refers to the activity value derived from the type of package and other management requirements, especially A1 and A2. Al means the activity value of a special form of radioactive material listed in Appendix B, Schedule B1 or derived in Chapter 5, The activity limit specified for the determination of the requirements of this standard. A2 means the one listed in Schedule B1 of Appendix B or in Chapter 5.

The activity value of the radioactive material other than the derived special form radioactive material is specified for the determination of the requirements of this standard. Radioactivity limit.

3.3 Multiparty approval

Except for the approval of the relevant government department of the original design country or the original shipping country, the consignment to be transported is on the way or arriving at any of them. In his country, it should also be approved by the relevant government departments of these countries. The term "via or arrival" does not include "flying over", ie the use of aircraft Such approval and notification requirements do not apply to the country when transporting radioactive material over a country and is not prepared to stay in that country.

3.4 Compliance guarantee

A series of measures and actions taken by relevant government departments to ensure that the provisions of this standard are observed in practice.

3.5 Quality assurance

Is a systematic outline for the management and supervision of organizations or units involved in the transport of radioactive materials, which is intended to Provide sufficient credibility to the safety requirements specified in this standard.

3.6 Radioactive material

Any item in the consignment that contains radionuclides and whose activity concentration and total radioactivity exceed the values specified in 5.1 to 5.2.

3.7 Radioactive content

Radioactive items in the package together with solids, liquids and gases that have been contaminated or activated.

3.8 Fissile nuclides and fissile material

The fissile nuclides refer to uranium-233, uranium-235, thorium-239, and thorium-241. Fissile material means any fissile nuclides containing any of the above material. This definition of fissile material does not include.

a) unirradiated natural or depleted uranium;

b) irradiated natural uranium or depleted uranium only in thermal neutron reactors;

c) materials containing less than 0.25 g of total fissile nuclide;

d) any combination of the above a), b) and/or c).

The above exclusion is only if there are no other fissile nuclide in the consignment in the package or in the unpackaged transport. Effective.

3.9 Special form radioactive material

A solid radioactive article that is not diffused or a seal containing radioactive material.

3.10 Low dispersible radioactive material

a solid radioactive article, or a solid radioactive article contained in a seal, whose dispersion is limited and not present Powdery.

3.11 Specific activity

Refers to the unit mass of radionuclide activity, also known as activity concentration.

The specific activity of a substance refers to the activity per unit mass in which the radionuclide is substantially uniformly distributed.

3.12 Low specific activity material (LSA)

According to its physical characteristics, it refers to radioactive articles with limited specific activity, or radioactive articles with an estimated average specific activity below the limit.

When determining the average specific activity, the outer shielding material around the low specific activity article should not be considered.

3.13 Surface contamination

There are more than a certain amount of radioactive material on the surface. for beta and gamma emitters and low toxicity alpha emitters, the amount exceeds 0.4 Bq/cm2, or for all other alpha emitters, the amount exceeds 0.04 Bq/cm2. Surface contamination includes non-fixed and fixed contamination.

- Non-fixed pollution means pollution that can be removed from the surface under normal conditions of transport;

- Fixed pollution means pollution other than fixed pollution.

3.14 Surface contaminated body (SCO)

A solid object that is not radioactive but has radioactive material on its surface.

3.15 Unirradiated uranium

The uranium content of uranium-235 per gram does not exceed 2 x 10^3 Bq, the content of fission products per gram of uranium-235 does not exceed 9 x 10^6 Bq and per gram of uranium Uranium-236 in -235 contains no more than 5 x 10^-3 g of uranium.

3.16 Natural uranium, depleted uranium, enriched uranium - natural, depleted, enriched

Natural uranium refers to uranium containing natural uranium isotope ratio obtained by chemical separation. Ure-238 accounts for 99.28% by mass. Uranium-235 accounts for about 0.72%).

Depleted uranium refers to uranium containing less than uranium-235 mass percent of natural uranium. Enriched uranium means uranium containing more than uranium-235 by mass.

The mass percentage of uranium-234 contained in the above three uranium is very small.

3.17 Unirradiated thorium

The uranium-233 content per gram of bismuth-232 does not exceed 10^-7 g of strontium.

3.18 Low toxicity alpha emitters

Thorium-228 contained in natural uranium, depleted uranium, natural strontium, uranium-235 or uranium-238, strontium-232, ore or physicochemical concentrate And thorium-230 and alpha emitters with a half-life of less than 10 d.

3.19 Packaging

Refers to one or more containers and any other components or materials in the container that are required for containment and other security functions.

3.20 Design

Clear description of special forms of radioactive material, low-dispersion radioactive material, exceptional fissile material as specified in 6.5.2, package or packaging Information on items. These materials may include technical specifications, engineering drawings, reports demonstrating compliance with regulatory requirements, and other relevant file.

3.21 Constraint system

A combination of fissile material and packaging components specified by the designer and approved by the relevant government authorities for maintaining criticality.

3.22 Containment system

A combination of packaging components for containment of radioactive articles during transport as determined by the designer.

3.24 Package

A general term for the shipping package and its radioactive content. The following types of packages covered by this standard shall comply with the emissions of Chapter 7. Sexual activity limits and classifications, and meet the corresponding requirements.

a) Exceptional package;

b) industrial packages;

c) Type A package;

d) B (U) type package;

e) B (M) type package;

f) Type C package.

Packages containing fissile material packages or uranium hexafluoride should meet the additional requirements.

3.25 Tank

Tank (tank) means a tank that can be transported, including cans, road tankers or tanks for railway tankers, or other solids, liquids, A gas container in which the capacity for transporting gas is not less than 450 L.

3.26 Collection wrapper

In order to facilitate loading and unloading and stacking during transportation, a single consignor is used to contain one or more packages and synthesize a unit for outsourcing. set.

3.27 Shipper consignor

The person or organization that submits the consignment to the transport.

3.28 Consignee

The person or organization that receives the consignment.

3.29 Carrier

An individual or organization that undertakes the transport of radioactive materials using any means of transport.

3.30 Consignment

The shipper submits a package or multiple packages, or a batch of radioactive items for transportation.

3.31 Radiation level

The corresponding dose rate expressed in mSv/h or µSv/h.

3.32 Radiation protection programme

Means a document that systematically describes radiation protection management and measures.

3.33 Transport index

For packages, collective packaging or cargo containers, or unpackaged LSA-I or SCO-I, the specified transport index (TI) is used for control A value for radiation exposure.

3.34 Critical safety index

The criticality safety index (CSI) given for packages, collection packages or cargo containers containing fissile material is used to control the loading A value for the accumulation of fissile material, parcels, and cargo containers.

3.35 Shipment

The specific transportation of the consignment from the place of departure to the destination.

3.36 Special arrangement

Some measures approved by the relevant government authorities, according to which they can transport consignments that do not meet all the applicable requirements of this standard. goods.

3.37 Exclusive use

A single shipper uses a single piece of transport or a large cargo container and follows the shipper's or consignee's requirements.

Transportation of the line, including loading, unloading and shipping of the starting point, midway and destination.

3.38 Transportation

Transportation means.

a) various vehicles used for road or rail transport;

b) any type of ship used for water transport, or any cargo hold, compartment or defined deck area of the ship;

c) Various aircraft used for air transportation.

3.39 Vehicle

Road vehicles (including articulated vehicles, that is, a combination of tractors and trailers) or rail cars or railway wagons. Every trailer should It is considered a separate vehicle.

3.40 Cargo aircraft

Means any aircraft carrying cargo or property other than a passenger aircraft.

3.41 Passenger aircraft

Carrying out employees of crew members, operators with official status, representatives authorized by the relevant national authorities or consignments or other The aircraft of any person other than the escort of the goods.

3.42 Ship

Various sea or inland watercraft for cargo.

3.43 Freight container

A cargo container is a type of transportation device that is durable and strong enough for reuse. Cargo containers are specially designed To transport goods in one or more modes of transport and without reloading in the middle, the design is equipped to be fixed and/or easy to install Parts for unloading and other purposes. The term "cargo container" does not include vehicles.

Small cargo containers are cargo containers with an internal volume of not more than 3 m3. Large cargo container means internal volume greater than 3 M3 cargo container.

3.45 Defined deck area

The area designated for the accumulation of radioactive material on the open deck of the ship, or on the deck of a ro-ro ship or ferry-parked vehicle.

4.1 Radiation protection

4.1.1 The dose received by personnel should be lower than the dose limit specified in GB 18871. Protection should be optimized, that is, considering the economy and society After the factor, the size of the individual dose, the number of people exposed, and the exposure caused by the individual's dose below the dose-constrained value The possibility is kept as low as reasonably achievable. Measures should be taken from organizational structures and systems, and transport and other The relationship between activities.

4.1.2 The shipper should develop a radiation protection program. The measures to be taken in the outline should be compatible with the size of the radiation exposure and the likelihood of exposure.

The outline should reflect the requirements for emergency response and should also reflect the requirements of 4.1.1, 4.1.3, 4.7.1 and 8.4.1.1. The text of the outline should follow It can be checked by relevant government departments.

4.1.3 Occupational exposure to transport activities.

a) When the effective dose in a year is never more than 1 mSv, no special working methods are required, and no detailed monitoring is required. Develop a dose assessment plan and save personal records;

b) Personal dose monitoring should be performed whenever possible when the effective dose for the year is expected to be between 1 mSv and 6 mSv. response The evaluation of the occupational exposure of such personnel shall be based on the results of individual monitoring or workplace monitoring;

c) Personal dose monitoring and evaluation should be performed when the effective dose for the year is expected to exceed 6 mSv.

Relevant records should be kept for personal monitoring or workplace monitoring.

4.1.4 The relevant government department shall stipulate the periodic assessment requirements for the radiation dose of personnel caused by the transportation of radioactive materials to ensure protection and The safety system complies with the requirements of GB 18871.

4.2 Emergency response

4.2.1 Once an accident or minor incident occurs during the transport of radioactive materials, the relevant regulations of China shall be observed and the response procedure shall be initiated when necessary. Take the necessary emergency measures to protect people, property and the environment.

4.2.2 Emergency procedures should consider other hazardous substances that may arise from the reaction between the contents of the consignment and the environment in the event of an accident.

4.3 Quality Assurance

Design, manufacture, testing, documentation, etc. for all special forms of radioactive materials, low-dispersion radioactive articles and packages, Use, maintain and inspect, and develop a quality assurance program for transport operations and intermediate storage operations to ensure effective compliance Standard related requirements. Proof that the design specification has been fully implemented should be submitted to the relevant government department. Manufacturer, consignment Both the person and the user should facilitate the inspection of the relevant government departments during the manufacturing and use process and confirm with the relevant government departments.

a) all manufacturing methods and materials comply with approved design specifications;

b) All packaging is inspected regularly and repaired and maintained as necessary to maintain good condition, even if it is repeated All relevant requirements and specifications are still met after use.