Decree No. 165 / 2009 Coll.
Decree establishing the list of selected items in the nuclear field
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Effective from 01.07.2009
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01.07.2009
18.06.2009
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165
DECLARATION
of 8 June 2009
establishing a list of selected items in the nuclear area
The State Nuclear Safety Authority provides, in accordance with § 47 (7), for the implementation of § 2 (b). (j) point 2 of Act No. 18 / 1997 Coll., on the Peaceful Use of Nuclear Energy and Ionizing Radiation (Atomic Act) and on the amendment and addition of certain laws:
(1) This decree establishes a list of selected items in the nuclear field.
(2) This Decree was notified in accordance with Directive 98 / 34 / EC of the European Parliament and of the Council of 22 June 1998 laying down a procedure for the provision of information in the field of technical standards and regulations and rules and of rules on information society services, as amended by Directive 98 / 48 / EC.
The list of selected items in the nuclear area is set out in the Annex to this Decree.
Decree No 179 / 2002 Coll., establishing a list of selected items and dual-use items in the nuclear field, is repealed.
This Decree shall take effect on 1 July 2009.
President:
Ing. Drábová, Ph.D. v. r.
Annex to Decree No 165 / 2009 Coll.
LIST OF SELECTED ITEMS SUBJECT TO CHECKS IN IMPORTS, EXPORT AND TRANSPORT
(SELECTED MATERIALS, EQUIPMENT AND TECHNOLOGY IN NUCLEAR AREA)
1. Nuclear reactors and specially designed or modified equipment and components for the operation of nuclear reactors
1.1. Complete nuclear reactors
Nuclear reactors capable of maintaining a controlled chain fission reaction, except zero-output reactors.
The nuclear reactor includes items that are or are directly associated with the reactor vessel, equipment controlling the power of the core and components that contain, come into direct contact with, or control the primary circuit coolant.
Zero power reactors are defined as having a designed maximum annual plutonium production not exceeding 100 g. Those reactors that can be modified to produce significantly more than 100 g of plutonium per year cannot be excluded. Reactors designed for continuous operation at a significant power level (requiring active cooling of the active zone), regardless of their capacity to produce plutonium, are not considered to be zero power reactors.
1.2. Reactor containers
Metal containers or their main workshops manufactured parts specially designed or modified for the location of the nuclear reactor core (as defined in 1.1.) as well as reactor assemblies (as defined in 1.8.).
The reactor vessel lid is included in item 1.2 as the main workshops manufactured by the reactor vessel component.
1.3. Nuclear reactor weighing machines
Manipulative equipment, specially designed or modified for the weighing or removal of fuel from a nuclear reactor (as defined in 1.1.), capable of carrying out fuel exchange in service or using technically complex location or direction elements that allow the execution of a complex of operations during the fuel exchange during the nuclear reactor shutdown when direct observations or access to the fuel are not usually possible.
1.4. Nuclear reactor control rods and related equipment
Specially designed or prepared rods, their supporting or hanging structures, pole drives and their guide tubes for the control of the fission process in a nuclear reactor (as defined in 1.1.).
1.5. Nuclear reactor pressure pipes
Pipe tubes specially designed or prepared to contain fuel elements and the primary coolant of the reactor (as defined in 1.1.) at an operating pressure exceeding 50 pm.
1.6. Zirconium tubes
Metal zirconium and alloys, in the form of tubes or pipe assemblies, specially designed or modified for use in a nuclear reactor (as defined in 1.1.), in quantities exceeding 500 kg for any country receiving at any time during 12 months, for which the hafnia-zirconium weighting ratio is less than 1: 500.
1.7. Primary cooling medium pumps
Pumps specially designed or modified to provide the circulation of the primary coolant of nuclear reactors (as defined in 1.1.), which may include complicated sealing or multiple sealing systems designed to prevent primary coolant leakage, hermetic motor pumps and centrifugal pumps.
This definition includes pumps certified in accordance with Part III, Section I, subpart NB (Class 1) of the American Engineering Society Code (ASME) or equivalent standards.
1.8. Construction of nuclear reactors
Nuclear reactor structures specially designed or modified for use in a nuclear reactor (as defined in 1.1.), including the core structure, control rods conductors, heat shielding, dampening divisions, active zone plate grids and diffuser plates.
Nuclear reactor assemblies are important structures within the reactor vessel that have one or more functions such as strengthening and fixation of the core, directing the primary coolant flow, providing radiological shielding of the reactor vessel and controlling the handling of tools and equipment within the core.
1.9. Heat exchangers
Heat exchangers (steam generators) specially designed or modified for use in the primary cooling circuit of a nuclear reactor (as defined in 1.1.), allowing the transfer of heat generated in the reactor (primary) to convert the supply water (secondary) into steam.
In the case of a liquid metal fast-moving reactor which operates with a liquid metal cooling loop as an intermediate step, heat exchangers transferring heat between the primary and the intermediate cooling circuit fall within the scope of the controlled items as an additional part of the steam generators.
The control range of this item does not include temperature exchangers for emergency cooling systems or breakdown heat cooling systems.
1.10. Neutron detection and measurement apparatus
Specially designed or modified neutron detection and measurement instruments for determining neutron flux levels within the reactor active zone (as defined in 1.1.).
This item includes internal and external instruments which measure neutron flow levels over a wide range, usually from 104 neutrons per cm2 / s to 1010 neutrons per cm2 / s or more. The external components are those devices outside the reactor active zone (as defined in 1.1.) which are, however, located within the biological shielding.
2. Non-nuclear materials for reactors
2.1. Deuterium and heavy water
Deuterium, heavy water (deuterium oxide) and other deuterium compounds in which the ratio of deuterium atoms to hydrogen atoms exceeds 1: 5 000, intended for use in a nuclear reactor (as defined in 1.1.), in quantities exceeding 200 kg of deuterium atoms for any recipient country at any time within 12 months.
2.2. Graphite nuclear purity
Graphite with a purity greater than 5 ppm boron equivalent and a density greater than 1,50 g / cm3, suitable for use in a nuclear reactor (as defined in 1.1.), in quantities exceeding 30 tonnes for any recipient country at any time within 12 months.
The boron equivalent (BE) can be determined experimentally or is calculated as the sum of BEZ for impurities (excluding BEuhík, because carbon is not considered to be impurity) including boron, where: BEZ (ppm) = CF x concentration of element Z (in ppm), CF is the conversion factor: (δZ x AB) divided by (δB x AZ), δB and δZ are the effective cross-sections of the capture of thermal neutrons (in bars) of boron found in nature, respectively element Z, and AB and AZ are atomic masses of boron occurring in nature or element Z respectively.
3. Race for the reprocessing of irradiated fuel cells and equipment specially designed or modified for this purpose
Plant for the reprocessing of irradiated fuel cells or parts thereof, which means equipment for cutting irradiated fuel cells, dissolving fuel, liquid extraction and storage of technological solutions. The plants may also contain equipment for the thermal denitration of uranium nitrate, for the conversion of plutonium nitrate to oxide or to metal and for the treatment of liquid fissile products into a form suitable for long-term storage or storage.
The items corresponding to the term "equipment specially designed or modified for the reprocessing of irradiated fuel elements' include:
3.1. Machines for dividing irradiated fuel cells
Remote controlled equipment specially designed or modified for use in a plant for the reprocessing of irradiated fuel elements, designed for cutting, cutting or cutting irradiated fuel cartridges, bundles or rods. These devices upset the fuel coating and thus prepare irradiated nuclear material for dissolution. Specially designed machine scissors are most often used, but modern equipment such as lasers can also be used.
3.2. Solvent tanks
Tanks secured against critical (for example, small diameter, ring or plate design) specially designed or modified for use in reprocessing plants which are designed to dissolve irradiated nuclear fuel in nitric acid and are resistant to hot, highly corrosive liquids and can be remotely filled and operated.
3.3. Liquid extractors and liquid extraction equipment
Specially designed or prepared extractors, such as charge and pulse columns, mixing and settling tanks or centrifugal reactors, for use in irradiated fuel cell reprocessing plants that separate uranium, plutonium and fissile products. Liquid extractors shall be resistant to corrosion by nitric acid.
Liquid extractors are usually manufactured according to extremely strict standards (including special welding, control, quality assurance and quality control) from low-carbon stainless steel, titanium, zirconium and other high-quality materials.
3.4. Containers for storage of chemicals or containers
Specially designed or prepared storage vessels or storage tanks for use in a irradiated fuel reprocessing plant, intended for further processing of three main flows resulting from extraction operations, which mean: pure uranium nitrate solution, highly radioactive fissile product solution and pure plutonium nitrate solution. These containers or containers shall be resistant to corrosion by nitric acid. They are usually made of materials such as low-carbon stainless steel, titanium or zirconium or other high-quality materials. Containers or containers may be designed for remote control and maintenance and may have the following parameters to prevent criticism: walls or internal structures corresponding to at least a boron equivalent of 2%, or a maximum diameter of 175 mm (7 in) for cylindrical containers, or a maximum width of 75 mm (3 in) for each plate or ring vessel.
4. Fuel cell plants for nuclear reactors and equipment specially designed or modified for this purpose
Oxide-based fuel cell plants and parts thereof, such as tablet pressing, sintering, crushing and sorting plants and MOX fuel plants. Equipment specially designed or modified for the production of fuel elements, as follows:
4.1. Fully automated control stents specially designed or prepared to control final dimensions and surface defects of tablets
4.2. Automatic welding machines specially designed or prepared for welding fuel cell end caps (or rods)
4.3. Automatic test and control stents specially designed or modified for checking the integrity of finished fuel cells (or rods)
b.
5. Plant for the separation of isotopes of natural uranium, depleted uranium or special fissile material and equipment other than analytical apparatus specially designed or modified for this purpose
Plant and technology for the separation of uranium isotopes and plants, equipment and technology for the separation of stable isotopes, excluding plants, equipment and technology for the separation of stable isotopes using the electromagnetic separation process.
Items corresponding to "equipment other than analytical instruments specially designed or modified for the separation of uranium isotopes' include:
5.1. Gas centrifuges, assemblies and components specially designed or modified for use in gas centrifuges
Gas centrifuges consisting of a thin-wall cylinder (s) with a diameter of 75 mm (3 in) to 400 mm (16 in) located in a vacuum environment and rotating at a high circumference speed, of 300 m / s or more, around a vertical axis. The design materials of the rotary components shall have a high strength relative to the mass in order to achieve the required speed. The assembly unit of the rotor and therefore its individual components must be produced with very small tolerances to reduce the imbalance of operation. The uranium enrichment gas centrifuge, unlike other centrifuges, is characterised by a rotor chamber with a rotating disc deflector (s) and a stationary tube assembly for the supply and extraction of UF6 gas, equipped with at least three separate channels, two of which are connected with blades reaching from the rotor axis to the rotor chamber circumference. A number of critical parts that do not rotate shall be included among the components and which, although specially designed, are not made from special materials.
5.1.1. Rotary components
5.1.1.1. Complete rotor assemblies
Thin-wall cylinders or a series of interconnected thin-wall cylinders which are made of high strength to density ratio materials. If the cylinders are connected, the connections are obtained by flexible waves or rings (as described in 5.1.1.3.). The rotor is equipped with an internal deflector (s) and end caps (as described in 5.1.1.4. and 5.1.1.5.). The complete assembly can be supplied only partially assembled.
5.1.1.2. Rotor tubes
Specially designed or prepared thin-wall cylinders with a wall thickness of 12 mm (0,5 in) or less, of a diameter of 75 mm (3 in) to 400 mm (16 in) made of high strength to density ratio materials.
5.1.1.3. Rings or cords
Components specially designed or prepared to allow the fitting of a rotor tube support structure or to join a series of rotor tubes together. The wavelength is a rolled short cylinder with a diameter of 75 mm (3 in) to 400 mm (16 in) with a maximum wall thickness of 3 mm (0,12 in), made of high strength to density ratio materials.
5.1.1.4. Deflectors
Circular components of a diameter of 75 mm (3 in) to 400 mm (16 in), specially designed or prepared to be mounted inside a centrifuge rotor tube, designed to separate the sampling chamber from the main separation chamber and, in some cases, to assist the circulation of UF6 gas within the main separation chamber of the rotor tube. They are made of high strength to density ratio materials.
5.1.1.5. Top and bottom end caps
Circular components with a diameter of 75 mm (3 in) to 400 mm (16 in) specially designed or prepared to close the ends of the rotor tube and to hold UF6 inside the rotor tube, which in some cases also act as supports, maintain or contain as an integral part of the upper bearing (top cap) or carry the rotational parts of the engine and lower bearing (bottom cap). They are made of high strength to density ratio materials.
For the rotary parts of centrifuges described in 5.1.1.1. to 5.1.1.5. high-tenacity steels having a tensile strength of 2,05 x 109 N / m2 (300 000 psi) or more, aluminium alloys having a tensile strength of 0,46 x 109 N / m2 (67 000 psi) or more, or fibrous materials, suitable for use in composite structures, with a specific modulus equal to or greater than 3,18 x 106 m and a specific tensile strength of 7,62 x 104 m or greater ("specific module 'is a Young module in N / m2 divided by specific weight in N / m3;" specific tensile strength limit' is the tensile strength in N / m2 divided by the specific mass of N / m3).
5.1.2. Non-moving components
5.1.2.1. Magnetic suspension bearings
Specially designed or prepared bearing assemblies, consisting of ring magnets suspended inside a housing containing a damping medium. The housing is made of UF6-resistant material, which means stainless steel, aluminium, aluminium alloys, nickel or nickel alloys containing at least 60% nickel. Magnetic pairs with pole attachments or second magnet are connected to the top cap (as described in 5.1.1.5.). The magnet can be ring shaped, with the maximum ratio between the outer diameter and the inner diameter equal to 1.6: 1. The magnet may have an initial permeability of at least 0,15 H / m (120,000 in CGS units), a minimum remanence of 98,5% or more and an energy yield of more than 80 kJ / m3 (107 Gauss-oersteds). In addition to the usual material characteristics, it is necessary that the deviation of the magnetic axis from the geometric axis is limited by very small tolerances (less than 0,1 mm (0,004 in)) or that a specific requirement for the homogeneity of the magnet material is applied.
5.1.2.2. Bearings and dampers
Specially designed or modified bearings incorporating a set of rotary pins, virtually lids, mounted on a silencer. The rotary pin is usually a hardened steel shaft with a hemisphere at one end and a fixture for the lower cap (as described in 5.1.1.5.) at the end of the other. A hydrodynamic bearing can be connected to the shaft. The lid is a pellet with a semi-spherical socket on one of the surfaces. These components are often supplied separately from the silencer.
5.1.2.3. Molecular pumps
Specially designed or prepared cylinders having internal machined or extruded helical grooves and internal machined openings. The usual dimensions are as follows: internal diameter 75 mm (3 in) to 400 mm (16 in), wall thickness at least 10 mm (0,4 in), with a length to diameter ratio of 1: 1 or more. The tracks have a typical rectangular cross-section and depth of 2 mm (0,08 in) or greater.
5.1.2.4. Engine stators
Specially designed or modified ring stators for high-speed multiphase AC-motors, modified for synchronous operation in a vacuum in the 600 - 2,000 Hz frequency range and 50 - 1,000 VA power range. The stators consist of multi-phase winding on a laminated core with small losses, consisting of thin iron sheets, usually of a thickness of 2 mm (0,08 in) or less.
5.1.2.5. Centrifugal cases
Components specially designed or prepared to accommodate gas centrifuge rotor tube assemblies. The cases consist of a solid cylinder with a wall thickness of up to 30 mm (1,2 in) with precision machined ends for bearing placement and one or more mounting flanges. Worked ends are parallel to each other and perpendicular to the longitudinal axis of the cylinder with a deviation of less than or equal to 0,05 °. The housing can also be of a honeycomb type for storing several rotor tubes. Containers are made of or protected by materials resistant to corrosion by UF6 which refer to stainless steel, aluminium, aluminium alloys, nickel or nickel alloys containing or containing at least 60% nickel.
5.1.2.6. Shoulders
Pipe with an internal diameter of up to 12 mm (0,5 in), specially designed or prepared for the extraction of UF6 gas from a rotor tube based on the effect of the Pitot tube (with an orifice oriented to the direction of the gas circuit flow within the rotor, for example by bending the end of the radially positioned tube), which can be fixed to the central gas discharge system. The tubes are made of or protected by materials resistant to corrosion by UF6, such as stainless steel, aluminium, aluminium alloys, nickel or nickel alloys containing at least 60% nickel.
5.2. Auxiliary systems, equipment and components specially designed or modified for enrichment plants with gas centrifuges
5.2.1. Power supply and discharge systems "product" and "residue"
Specially designed or modified technological systems include:
5.2.1.1. power supply autoclaves (or stations) of a kind used for the introduction of UF6 into centrifugal cascades at pressures up to 100 kPa (15 psi) and flow rates of 1 kg / h or greater;
5.2.1.2.2. desublimers (or freezing precipitators) used to remove UF6 from cascades at pressures up to 3 kPa (0,5 psi). Desublimators may be cooled to 203 K (-70 ° C) and heated to 343 K (+ 70 ° C),
5.2.1.3.The "product" and "residues" stations used to fill UF6 into containers.
The items specified in 5.2.1.1 to 5.2.1.3 are fully made of corrosion resistant materials of UF6 which refer to stainless steel, aluminium, aluminium alloys, nickel or nickel alloys containing at least 60% nickel, or are lined with such materials and are made to meet the requirements of very high vacuum and purity standards.
5.2.2. Machine piping systems for collectors
Specially designed or modified piping and collector systems for the transport of UF6 within centrifugal cascades. The piping network is usually a type of "triple" collector system where each centrifuge is connected to each collector (s). This arrangement is repeated many times. All of these systems are made of corrosion resistant materials of UF6, which refer to stainless steel, aluminium, aluminium alloys, nickel or nickel alloys with a minimum nickel content of 60%, and are made to meet the requirements of very high vacuum and purity standards.
5.2.3. Special closing and regulating valves
Specially designed or prepared wave valves with manual or automatic control or control, manufactured or coated materials resistant to corrosion by UF6, meaning stainless steel, aluminium, aluminium alloys, nickel or nickel alloys with a nickel content of at least 60%, a diameter of 10 to 160 mm for use in major or auxiliary gas centrifuge enrichment plants.
5.2.4. Mass spectrometers for UF6 analysis and ion sources
Specially designed or modified magnetic or quadruple mass spectrometers capable of "on-line" sampling of the supply material from UF6, "product" or "residue" streams, having all of the following:
(a) unit resolution capacity for atomic mass exceeding 320;
(b) ion sources made of or coated with nicrome or monel or nickel,
(c) ion sources with electron bombardment ionisation; and
(d) a collector's system suitable for isotopic analysis.
5.2.5. Frequency changers
Frequency changers, also known as converters or inverters, specially designed or modified for the supply of engine stators (as defined in 5.1.2.4.), or parts, components and assembly subsystems of such frequency converters, having all of the following:
(a) multi-phase output in the 600 - 2,000 Hz frequency area;
(b) high stability (with a frequency control better than 0,1%);
(c) low harmonic distortion (less than 2%); and
(d) an efficiency greater than 80%.
5.3. Specially designed or prepared assemblies and components for use in gas diffusion enrichment
Items corresponding to the term "specially designed or prepared assemblies and components for use in gas diffusion enrichment 'include:
5.3.1. Gas diffusion bulkheads
5.3.1.1. a.
5.3.1.2. Specially modified compounds or powders for the manufacture of these filters. Such compounds and powders contain nickel or nickel alloys with a minimum nickel content of 60%, aluminium oxide or to UF6 fully resistant fluorinated hydrocarbon polymers with a purity of 99,9% or more, with a particle size of less than 10- 5 m and a high particle size uniformity which are specially designed for the production of gas diffusion bulkheads.
5.3.2. Diffuser lockers
a. These containers are made or internally lined with corrosion resistant materials of UF6, which, for this item, mean stainless steel, aluminium, aluminium alloys, aluminium oxide, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to UF6, and are designed for installation in horizontal or vertical positions.
5.3.3. Compressors and gas blowers
Specially designed or prepared axial, centrifugal or volume compressors or gas blowers with a minimum suction capacity of 1 m3 / min UF6 and a discharge pressure of up to several hundred kPa (100 psi), designed for long-term use in UF6, with or without an electric motor, as well as individual assemblies of such compressors and blowers. These compressors and blowers have a pressure ratio of 2: 1 to 6: 1 and are made of or coated with stainless steel, aluminium, aluminium alloys, aluminium oxide, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to UF6.
5.3.4. shaft sealing
Specially designed or modified vacuum seals that provide sealing of the inlet and outlet flanges and serve for sealing of the shaft connecting the compressor rotor or the engine-driven blowers and ensuring a reliable sealing of the internal chamber of the compressor or blower that is filled with UF6. Such seals are usually designed for a balancing gas penetration rate of less than 1000 cm3 / min (60 in3 / min).
5.3.5. Heat exchangers for UF6 cooling
Specially designed or prepared heat exchangers made of or made of aluminium, aluminium alloys, aluminium oxide, nickel or alloys containing or coated with at least 60% nickel and UF6-resistant fully fluorinated hydrocarbon polymers. They are designed for a maximum pressure change rate due to leakage of less than 10 Pa (0,0015 psi) per hour at a pressure difference of 100 kPa (15 psi).
5.4. Specially designed or modified auxiliary systems, equipment and components for use in gas diffusion enrichment plants
5.4.1. Power supply and removal systems for "product" and "residue"
Specially designed or modified technological systems capable of operating at a maximum pressure of 300 kPa (45 psi), including:
5.4.1.1. power supply autoclaves (or systems) used to bring UF6 into gas diffusion cascades,
5.4.1.2.Desublimators (or freezing precipitators) for use in the removal of UF6 from diffuse cascades,
5.4.1.3.Liquefying stations in which UF6 gas from cascades is compressed, cooled and thus transferred into liquid form,
5.4.1.4.The "product" and "residues" stations used to fill UF6 into containers.
5.4.2. Pipes for collectors
Specially designed or modified pipeline and collector systems for the transport of UF6 within gas diffusion cascades. This pipeline network is usually designed with a "double" collector system (s) where each unit is connected to each collector (s).
5.4.3. Vacuum systems
5.4.3.1. Specially designed or modified large-scale vacuum collectors, collection piping and vacuum pumps with a suction capacity of 5 m3 / min (175 ft3 / min) or greater.
5.4.3.2. Vacuum pumps specially designed for use in UF6-containing environments, made of or coated with nickel, aluminium, nickel or nickel alloys. These pumps may be made either as rotary or volume pumps. They may have gaskets and seals of hydrofluorocarbons polymers and may use special working fluids.
5.4.4. Special closing and regulating valves
Specially designed or modified shut-off valves with manual or automatic control and control wave valves with a diameter of 40 to 1,500 mm (1,5 to 59 in) for installation in main and auxiliary enrichment plant systems based on a gas diffusion method, made of materials resistant to UF6, which for this item mean stainless steel, aluminium, aluminium alloys, aluminium oxide, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to UF6.
5.4.5. Mass spectrometers for UF6 analysis and ion sources
Specially designed or modified magnetic or quadruple mass spectrometers capable of "on-line" sampling of the supply material from UF6, "product" or "residue" streams, having all of the following:
(a) unit resolution capacity for atomic mass exceeding 320;
(b) ion sources made of or coated with nicrome or monel or nickel,
(c) ion sources with electron bombardment ionisation; and
(d) a collector's system suitable for isotopic analysis.
The items specified in 5.4.1 to 5.4.5 shall meet the requirements of very high vacuum and purity standards. The measuring, control and control systems shall ensure that the vacuum is maintained in all technological systems, automatic emergency protection and accurate automatic regulation of the gas stream. The items specified in 5.4.1 to 5.4.5 either come into direct contact with UF6 gas in the technological process or directly regulate the flow in cascades. All surfaces that come into contact with the technological gas are made of or coated with materials resistant to UF6.
5.5. Specially designed or modified systems, equipment and components for use in enrichment plants based on the aerodynamic process
5.5.1. Separation nozzles
Specially designed or prepared separation nozzles or their assemblies. Separation nozzles consist of slit, curved channels with a radius of curvature of less than 1 mm (mostly from 0,1 to 0,05 mm). They are made of corrosion resistant materials of UF6, which mean copper, stainless steel, aluminium, aluminium alloys, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to corrosion by UF6. Inside the nozzle is a blade that divides the gas flowing through the nozzle into two fractions.
5.5.2. Faith tubes
Specially designed or modified vortex tubes or their assemblies. Of a thickness exceeding 0,15 mm The tubes have one or more tangential inlet holes that can enter the tube with a technological gas. At one or both ends, the tubes may be equipped with nozzles.
5.5.3. Compressors and gas blowers
a.
5.5.4. shaft sealing
a.
5.5.5. Heat exchangers for gas cooling
a.
5.5.6. Cases of separation elements
Specially designed or modified separation element housings made of corrosion resistant materials of UF6, which mean copper, stainless steel, aluminium, aluminium alloys, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to corrosion by UF6, or such materials protected by vortex tubes or separation nozzles. These casings may consist of specially designed or prepared cylindrical containers with a diameter of more than 300 mm and a length of more than 900 mm or rectangular containers of comparable dimensions. These containers may be designed for installation in a horizontal or vertical position.
5.5.7. Power supply and removal systems for "product" and "residue"
a.
5.5.7.1.Supply autoclaves, furnaces or systems used to bring UF6 to the enrichment process;
5.5.7.2.Desublimators (or freezing precipitators) used to remove UF6 from the enrichment process before further relocations following heating,
5.5.7.3.solidifying or liquefying stations used to remove UF6 from the enrichment process by compressing UF6 into solid or liquid form;
5.5.7.4.The "product" and "residues" stations used to fill UF6 into containers.
5.5.8. Pipes for collectors
Specially designed or modified tube or pipe systems for the transport of UF6 within aerodynamic cascades, made of or protected by materials resistant to corrosion by UF6, such as copper, stainless steel, aluminium, aluminium alloys, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to corrosion by UF6. This pipeline network is usually designed with a "double" collector system where each unit or group of units is connected to each collector.
5.5.9. Vacuum systems and vacuum pumps
5.5.9.1. a.
5.5.9.2. Vacuum pumps specially designed or modified for use in an environment containing UF6, made of or protected by materials resistant to corrosion by UF6, such as copper, stainless steel, aluminium, aluminium alloys, nickel or alloys containing at least 60% nickel and fully fluorinated hydrocarbon polymers resistant to corrosion by UF6. These pumps may use gaskets made of hydrofluorocarbons polymers and special working fluids.
5.5.10. Special closing and regulating valves
a.
5.5.11. Mass spectrometers for UF6 analysis and ion sources
Specially designed or modified magnetic or quadruple mass spectrometers capable of "on-line" sampling of the supply material from UF6, "product" or "residue" streams, having all of the following:
(a) unit resolution capacity for atomic mass exceeding 320;
(b) ion sources made of or coated with nicrome or monel or nickel,
(c) ion sources with electron bombardment ionisation; and
(d) a collector's system suitable for isotopic analysis.
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Regulation Information
| Citation | Decree No. 165 / 2009 Coll., on the establishment of a list of selected items in the nuclear field |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 18.06.2009 |
|---|---|
| Effective from | 01.07.2009 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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