WO2019086329A1 - Vorrichtung und verfahren zum wahlweisen durchführen von nuklidaktivierungen und messungen in einem kernreaktor mittels nuklidaktivierungs-targets und messkörpern - Google Patents
Vorrichtung und verfahren zum wahlweisen durchführen von nuklidaktivierungen und messungen in einem kernreaktor mittels nuklidaktivierungs-targets und messkörpern Download PDFInfo
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- WO2019086329A1 WO2019086329A1 PCT/EP2018/079322 EP2018079322W WO2019086329A1 WO 2019086329 A1 WO2019086329 A1 WO 2019086329A1 EP 2018079322 W EP2018079322 W EP 2018079322W WO 2019086329 A1 WO2019086329 A1 WO 2019086329A1
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- branch
- targets
- measuring
- reactor
- removal
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
- G21G1/00—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes
- G21G1/02—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes in nuclear reactors
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C23/00—Adaptations of reactors to facilitate experimentation or irradiation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the present invention relates to a device for selectively transferring nuclide activation targets and measuring bodies into or out of an instrumentation finger of a nuclear reactor.
- the invention further relates to a method for activating nuclide activation targets and optionally for energizing measuring bodies in an instrumentation finger of a nuclear reactor using such a device.
- Radionuclides are used in many fields of technology and medicine, especially in nuclear medicine.
- appropriately suitable stable nuclides are typically irradiated with neutrons.
- neutrons As a result of neutron capture, unstable nuclides are formed, which convert into radioactive decay chains, emitting alpha, beta, gamma or proton radiation, into stable nuclides.
- the irradiation with neutrons, also called nuclide activation is usually carried out in research reactors, which are limited for the mass production of radionuclides in terms of their capacity for the most part.
- nuclide activation targets into one or more instrumentation fingers of a commercial nuclear reactor in order to be activated there by the radiation emitted by the nuclear fuel rods.
- nuclide activation targets into one or more instrumentation fingers of a commercial nuclear reactor in order to be activated there by the radiation emitted by the nuclear fuel rods.
- the Instrumentationsfinger used to record the targets are usually already existing tubes that run parallel to the nuclear fuel rods within the reactor core and are usually part of a so-called ball or Kugelschussmesssystems to determine the power density distribution in the reactor core.
- measuring spheres with activatable matter for example vanadium
- the balls are in the Fingers like a chain directly on or on each other.
- the balls are activated by the emitted radiation of the nuclear fuel rods and after a predetermined residence time via a conduit system from the core region of the reactor in a measuring device, the so-called measuring table, transported to determine their activity.
- the line system including instrumentation finger is self-contained and has a diameter in the range of the ball diameter, so that the order of the ball chain in the instrumentation finger is retained during transfer to the measuring table.
- the balls in the chain can be associated with a respective longitudinal position of the nuclear fuel rods, which in turn allows conclusions to be drawn about the axial power density distribution of the neutron flux in the reactor core.
- Such a measuring system also called spherical measuring system or ball-shot measuring system, with measuring device and corresponding line system is known for example from US 3 71 1 714.
- the findings gained from the sphere measurement are used for reactor safety and are therefore usually compulsory at regular intervals.
- other measuring systems with instrumentation fingers and corresponding measuring bodies are also known, which serve to measure other characteristics of the measuring bodies that are variable by energetic excitation in the nuclear reactor, which characterize the properties of the fuel rods and the conditions inside the reactor core.
- the object of the present invention is therefore to provide a device and a method which on the one hand enable a technically acceptable use of the instrumentation fingers of a nuclear reactor for target activation, but on the other hand at any time to carry out a measurement, such as a shotgun measurement for determining the power density distribution or of the neutron flux, in the reactor core.
- the device comprises a conduit system for receiving and transporting the measuring balls and targets, which comprises a plurality of opening in a multi-way valve line branches, which can be selectively brought into fluid communication with each other via the switchable multi-way valve.
- the line system comprises at least one reactor branch with an end coupling for coupling the line system to the instrumentation finger, a memory branch for temporarily storing the measuring bodies or targets and a measuring branch with an end coupling for coupling the line system to a measuring device for determining a variable by energetic excitation in the nuclear reactor Property of the measuring body.
- At least the reactor branch, the storage branch and the measuring branch open into the multi-way fitting of the device in a node-like manner.
- the switchable multi-way valve is designed to connect in a first switching position the reactor branch with the storage branch and in a second switching position the reactor branch with the measuring branch flow.
- the device further comprises a pneumatic or mechanical transport device for transporting the measuring bodies and targets through the device.
- the line system and the multi-way valve are in particular fluid and solid body leading.
- the provision of a memory branch in the line system makes it possible for the first time to interrupt a running target activation process for the purpose of a prioritized measurement and to temporarily park or temporarily store the partially irradiated nuclide activation targets in the memory branch so briefly release the instrumentation finger used for the activation for a prioritized measurement, such as a ball measurement to determine the power density, and then refill with the cached targets to continue the activation process.
- a prioritized measurement such as a ball measurement to determine the power density
- the operational safety can be ensured and on the other hand the otherwise unused instrumentation finger can additionally be used commercially for the production of radionuclides.
- the additionally exploited exploitation potential of the nuclear reactor becomes obvious when one considers that most prescribed measurements, such as ball measurements to determine the power density, are not necessary on a daily basis and corresponding measuring bodies typically only spend a few minutes in the instrumentation finger. During the rest of the time, the instrumentation finger is at liberty for nuclide activation.
- the length of the memory branch corresponds at least to the length of the instrumentation finger, so that the maximum possible target quantity corresponding to the length of the instrumentation finger can be parked in the memory branch.
- the length of the memory branch is at least 5 m, in particular at least 10 m, preferably at least 30 m.
- the memory branch preferably has a substantially rectilinear, in particular substantially horizontally aligned, section.
- the memory branch may be formed spirally at least in sections, resulting in a particularly space-saving design.
- the opportunity created by the invention to be able to interrupt a nuclide activation process at any time and be able to carry out a measurement in the short term advantageously achieves the effect that several, in particular basically all, existing instrumentation fingers of a nuclear reactor are preserved Operational safety regulations for radionuclide production can be used.
- several or all instrumentation fingers of a nuclear reactor are equipped with an apparatus according to the invention or that the apparatus according to the invention is designed to operate a plurality of instrumentation fingers, ie to selectively transfer nuclide activation targets and measuring bodies into or out of a plurality of instrumentation fingers of a nuclear reactor ,
- the switchable multi-way valve allows it - after once the implementation of the inventive device - in a technically very simple manner, during operation of the reactor - without further modification of the system, in particular without opening the closed pipe system - between the production of radionuclides and a measurement switch over by means of measuring bodies.
- This reduces the risk of contamination to a minimum.
- the switchable multi-way valve serves so far as a switch to release the different transport routes between the different branches or lock.
- the targets which were previously introduced into the instrumentation finger via the line system are removed from the instrumentation finger via the reactor branch and transferred into the memory branch.
- the multi-way valve is in the first switching position, so that the reactor branch is fluidly connected to the storage branch. Subsequently, the multi-way valve is transferred to the second switching position in order to connect the reactor branch with the measuring branch and thus the Instrumentationsfinger with the measuring device in which the measuring bodies are typically in preparation for a measurement, flow. Then the measuring ball are transferred from the measuring device via the measuring branch, the multi-way valve and the reactor branch into the instrumentation finger of the nuclear reactor.
- the measuring bodies are transferred again via the same path, ie via the reactor branch, the multi-way fitting and the measuring branch from the instrumentation finger into the measuring device.
- the property of the measuring bodies which is variable by energetic excitation can be determined, for example the activity of the irradiated measuring bodies for the purpose of determining the power density distribution of the neutron flux in the reactor core.
- the Instrumentation finger again for the nuclide activation available.
- the multi-way valve is again transferred to the first switching position and transferred the partially irradiated targets from the memory branch via the multi-way valve and the reactor branch back into the instrumentation finger so as to continue or complete the activation process of the targets.
- the activation process can basically be interrupted several times, ie as often as desired for a measurement.
- the irradiated targets may be withdrawn from the instrumentation finger via the conduit system for their intended use.
- the memory branch may have an end-side coupling for coupling the line system to a removal container for irradiated targets.
- the line system preferably has a separate removal branch with an end-side coupling for coupling the line system to a removal container for irradiated targets.
- the removal branch may, for example, be connected to the end of the storage branch, i. opposite to that end of the storage branch which opens into the multi-way valve.
- the device may have a stop in the transport path between storage branch and removal branch and executable stop, for example, a magnetic stop, to block the transport path between the storage branch and removal branch.
- executable stop for example, a magnetic stop
- the multi-way valve can be technically simple design, such as a 3/2-way valve, in particular with only one switchable passage.
- the removal branch can open directly into the switchable multi-way valve.
- the multi-way valve is further designed to connect the removal branch to the reactor branch or the removal branch to the storage branch in a third switching position in terms of flow.
- the irradiated targets can advantageously be transferred directly directly from the instrumentation finger via the reactor branch, the multiway fitting and the removal branch into a removal container for irradiated targets. This allows a very fast and procedurally very simple removal process.
- the second variant (removal branch is connected to the memory branch in the third switching position) allows the realization of a technically simple multi-way valve, such as a 4/3-way valve, in particular with only one switchable passage.
- the measuring device is designed to measure at least one characteristic of the measuring bodies which is variable by energetic excitation in the nuclear reactor, i. a property of the measuring body, which can be influenced for example by excitation by means of or exposure to radiation energy or thermal energy in the instrumentation finger of the nuclear reactor.
- the variable property of the measuring body may in particular be a radiation-dependent or temperature-dependent property.
- the measuring device can be designed to determine one or more parameters based on the measurement of the variable property of the measuring bodies, which characterize the properties of the fuel rods and / or the conditions inside the reactor core.
- the measuring device can be designed in particular for measuring the activity of the measuring bodies caused by irradiation.
- the measuring device for determining the power density distribution or the neutron flux in the reactor core may be formed on the basis of the measured activity of the measuring body.
- the measuring device can be designed to determine a temperature-induced or thermal energy-induced color change. The determination of the color change can be used, for example, to determine the temperature in the nuclear reactor.
- the measuring bodies and / or nuclide activation targets are preferably spheres or spherical. However, other shapes of the measuring bodies and / or nuclide activation targets, for example cylindrical or ellipsoidal, are also conceivable. The shape is chosen so that the measuring bodies and / or nuclide activation targets can be transported unhindered through the conduit system and the instrumentation finger.
- the diameter of the measuring body and / or nuclide activation targets is preferably only slightly smaller than the diameter of the conduit system and the instrumentation finger.
- the diameter of the measuring body and / or nuclide activation targets in the range of 50% to 99%, in particular in the range of 70% to 95%, preferably in the range of 80% to 95% of the diameter of the conduit system and / or the instrumentation finger.
- the diameter of the measuring body and / or nuclide activation targets is according to a advantageous embodiment of the invention between a 1 mm and 3 mm, in particular between 1 .2 mm and 2mm, preferably 1 .5 mm and 1 .7 mm.
- the measuring branch and the reactor branch are coupled via their respective end-side coupling to a measuring device or to an instrumentation finger of the nuclear reactor.
- the coupling of the reactor branch to the instrumentation finger of the reactor can take place in particular in the region of a so-called cable bridge above the reactor vessel.
- the reactor branch may further comprise a blocking device, for example a magnetically actuated, in particular in the reactor branch and executable stop, such as a pin, pin or bolt, to block the transport path through the reactor branch.
- the couplings are preferably designed for gas-tight coupling to the measuring device or to the instrumentation finger, in order to ensure safe transport of the targets and measuring bodies by means of transport gas in the case of a pneumatic transport device.
- the reactor branch ramifies, in particular cascade ramified, so as to connect several or all Instrumentationsfinger a nuclear reactor via each branch of the reactor branch with the inventive device.
- Each branch of the reactor branch can have a coupling for coupling the respective branch to an instrumentation finger of the reactor at the end.
- the device may comprise distributor valves for selectively connecting branches of the reactor branch departing from branching in the direction of the instrumentation finger to the multi-way valve or to a multiway valve section of the reactor branch.
- the end-side couplings of the reactor branch, the measuring branch and optionally a removal branch and an insertion branch, as described below, are preferably arranged at the free ends of the respective branches, i. opposite to those ends of the branches that open into the multi-way fitting.
- the removal branch can also be an end coupling for coupling, in particular gas-tight coupling to a Have removal container for irradiated targets.
- the removal branch can be coupled accordingly via its end coupling to a removal container.
- the removal of the targets can also take place without direct coupling of the removal branch to a removal container.
- the transfer of the targets from the removal branch into a removal container can be effected exclusively by gravitation, in particular without transport gas.
- the device in the removal branch in particular in the region of the free end of the removal branch on a shut-off valve for gas-tight shut-off of the removal branch relative to the environment. As a result, the risk of contamination is minimized in an advantageous manner.
- the device may have an insertion branch with an end-side coupling for coupling, in particular gas-tight coupling to an insertion device, which is designed for introducing unirradiated targets into the line system.
- the introduction device can be, for example, a container, such as a cartridge, or a funnel in which unirradiated targets are located.
- the insertion device preferably has an outlet for introducing the targets into the insertion branch, to which the end-side coupling of the insertion branch can be coupled.
- the introduction of the targets in the Ein slaughterg can (exclusively) gravitationally driven by means of transport gas or by means of mechanical transport.
- the Ein slaughterg can open at any point in the pipe system, in particular in a node of the pipe system.
- the introduction branch preferably leads into the multiway fitting.
- the multi-way valve is preferably additionally designed to connect the introduction branch to the reactor branch or to the storage branch in a fifth switching position in terms of flow. If the multi-way valve connects the introduction branch to the reactor branch, the unirradiated targets can be introduced directly from the introduction device into the instrumentation finger via the introduction branch, the multipath fitting and the reactor branch. This makes filling particularly effective.
- the multi-way fitting can be technically easier to implement if it is designed to connect the introduction branch with the storage branch in terms of flow.
- the device also in Ein 1500zweig, especially in the region of the free end of the insertion branch a shut-off valve for gas-tight shut-off of Ein 1500zweigs against the environment. As a result, the risk of contamination is minimized in an advantageous manner.
- the removal branch can also serve as an insertion pointer.
- the withdrawal branch may be configured to be selectively coupled to an introducer or a withdrawal container to either introduce unirradiated targets into the conduit system or to transfer irradiated targets from the conduit system to a withdrawal vessel. This is possible both when the removal branch end connects to the storage branch, as well as when the removal branch opens as a separate branch directly into the multi-way valve or another node of the line system.
- the memory branch can also serve as an introduction branch and / or removal branch.
- the storage branch can be designed to be coupled to an introduction device or optionally to an introduction device and a removal container in order either to introduce unirradiated targets into the line system or to transfer irradiated targets from the line system into a removal container.
- the storage branch may have on one side a correspondingly formed coupling.
- the memory branch for introducing unirradiated targets or removing irradiated targets at its end facing away from the multi-way valve may have an end coupling for coupling, in particular optional coupling to an insertion device and / or a removal device.
- the introduction device and the removal device can in particular be realized together by a combined introduction-removal device.
- the introduction device and / or the removal device or the combined insertion-removal device may comprise a transfer container, in particular a shielding transfer container.
- the memory branch may further comprise a blocking device, for example a magnetically actuated, in particular in the memory branch and executable stop, such as a pin, pin or bolt to block the transport path through the memory branch.
- the device has a shield against ionizing at least along a portion of the memory branch Radiation on.
- the shield is a lead shield.
- the length of the shield along the memory branch or the shielded section of the memory branch corresponds at least to the length of the instrumentation finger, so that the maximum possible length of the target chain corresponding to the length of the instrumentation finger can be parked in the memory branch under shielded conditions.
- the length of the shielded portion of the memory branch is at least 2 m, in particular at least 4 m, preferably at least 5 m.
- the shielded portion of the memory branch is substantially rectilinear, in particular substantially horizontally aligned. Alternatively, the shielded portion may be formed spirally, resulting in a particularly space-saving design.
- the multi-way valve may also be designed to connect the memory branch with the measuring table branch in a fourth switching position in terms of flow.
- the measuring bodies can advantageously be temporarily parked in the storage branch, preferably under shielded conditions, at those times when no measurement is carried out.
- the radiation safety of the overall device is also increased, in particular if the shielding of the memory branch is more effective than any shielding of the measuring device.
- the mostly radiation-sensitive detectors in the measuring device are protected from excessive or unnecessary exposure to radiation by the temporary storage of the measuring body and thus preserved against unintentional aging.
- the device has a parking section in the measuring branch for the intermediate parking of the measuring bodies or targets.
- the device has at least along a portion of the measuring branch, in particular along the Parkierabitess on a shield against ionizing radiation. This provides, inter alia, an alternative possibility of temporarily interposing the measuring bodies in the parking section of the measuring branch, preferably under shielded conditions, at those times in which no measurement is carried out.
- the Measuring branch further comprise a blocking device, for example a magnetically actuated, in particular in the measuring branch and executable stop, such as a pin, pin or bolt, to block the transport path through the measuring branch.
- a blocking device for example a magnetically actuated, in particular in the measuring branch and executable stop, such as a pin, pin or bolt, to block the transport path through the measuring branch.
- the measuring branch may comprise at least one holding magnet in at least one of said end regions of the parking section, for example at least one electromagnet or at least one switchable or slidable permanent magnet.
- the preferably magnetic measuring body can be held in Parkierzweig.
- the fluid connections made between the various branches of the conduit system through the multiway fitting are preferably formed by one or more passageways in the multiway fitting.
- the multi-way fitting may have at least one movable, in particular displaceable or rotatable adjusting element through which the one or more passage channels extend.
- the multi-way valve may in particular have a fitting housing, which has the connection points and in which the at least one movable, in particular displaceable or rotatable adjusting element is received, in particular mounted.
- the multiway fitting may comprise an actuator, for example a servomotor, by means of which the movable, in particular displaceable or rotatable adjusting element can be brought into the various switching positions.
- the multi-way valve is designed as a multi-way valve, in particular as a (multiway) rotary valve or (multiway) rotary control valve or (multiway) slide valve.
- the multiway fitting can be configured as a (multiway) ball valve or (multiway) plug valve.
- the multi-way valve may, for example, have an actuating element which is rotatably mounted in a fitting housing rotatable.
- the fitting housing has at least three, in particular at least four, preferably at least five, more preferably six or more connection points.
- the at least three, in particular at least four, preferably at least five, more preferably six or more connection points are preferably distributed circumferentially uniformly with respect to the fitting housing. The number of connection points depends on the diameter of the multi-way valve and can be increased with increasing diameter.
- the rotatable adjusting element has at least one, in particular at least two, preferably three or even more than three passage channels in order to connect the reactor branch with the measuring branch or the reactor branch with the storage branch in terms of flow in at least the first and second switching position of the actuating element.
- the rotatable actuating element preferably has at least two, preferably three or more than three through-channels.
- the multi-way valve is designed as a 3/2-way valve, in particular as a 3/2-turn valve.
- the multi-way fitting can be designed as a 3/3, 4/3, 4/4, 5/4, 5/5, 6/5, 6/6 or 6/7 way fitting his.
- the multi-way valve may be formed as a rotary valve with a rotatable adjusting element, wherein the rotatable adjusting element has at least a first, a second and a third passage, which extend perpendicular to a rotational axis of the rotatable adjusting element by the adjusting element.
- the first through-passage can run in a straight line through the axis of rotation of the adjusting element, in particular in order to connect to each other two connection points which are opposite each other by 180 °.
- the second passageway may be curved in a 120 ° arc symmetrically offset from the first passageway through the actuator, in particular to connect two peripherally offset by 120 ° to each other arranged connection points.
- the third through-channel can be formed the same as the second through-channel and extend mirror-symmetrically with respect to the first through-channel to the second through-channel through the adjusting element.
- the third through-channel can run secant-like, in particular rectilinear or curved, through the adjusting element, in particular asymmetrically offset from the first through-channel opposite the second through-channel to two connection points arranged mutually offset by 60 ° to one another connect.
- Such a through-passage preferably serves only for the fluidic connection of two connection points, in particular for connecting the reactor branch to an exhaust line (as described below).
- the above-described rotary valve has no third passage, but only the rectilinear first passage and the curved in a 120 ° arc second passage.
- the multi-way valve formed as a rotary valve may have an actuating element with at least one, in particular exactly one through-channel, which extends curved in a 90 ° or 120 ° arc through the adjusting element, in particular by two circumferentially by 90 ° or 120th ° mutually offset connection points to connect.
- the multi-way valve is designed as a rotary valve with a valve body and a rotatable actuator, wherein the valve body has at least six, in particular exactly six connection points and the rotatable actuator has at least one first and one second passage, each in a 120 ° arc curved and are arranged mirror-symmetrically to each other.
- This embodiment can be used in particular to operate with two-way valve two instrumentation fingers.
- two reactor branches, two storage branches and two measuring branches can open into the multi-way valve, preferably into respectively opposite connection points, wherein in each case one reactor branch, one storage branch and one measuring branch are assigned to one of the instrumentation fingers.
- the multi-way valve connects in each case a reactor branch with an associated memory branch or an associated measuring branch.
- Each one of the Instrumentationsfinger associated reactor branch, measuring branch and memory branch form a sub-line system so far.
- the multiway valve has according to an advantageous embodiment of the invention at least one actuator, in particular a pneumatic or electric actuator, for example a servomotor, for actuating the at least one movable actuating element.
- the actuator can be designed for simultaneously actuating a plurality of multi-way valves, for example when a plurality of instrumentation fingers of a nuclear reactor are each equipped or operated with a device according to the invention.
- rotary valves multi-way valves with a common axis of rotation be operatively connected, which is driven by a common actuator.
- the rotatable adjusting elements of a plurality of multi-way valves designed as rotary valves can be arranged on a common axis of rotation.
- the transport device may be designed as a pneumatic or as a mechanical transport device.
- transport gas for example compressed air or nitrogen
- a mechanical transport device is a mechanical conveying means, for example, one or more flexible pressure-transmitting elements, such as cables, wires, chains or the like, for mechanically pushing the targets and measuring body through the conduit system, in and out of the instrumentation finger and preferably in and out of a measuring device and / or an insertion device and optionally in a removal container.
- a mechanical conveyor as known from EP 2093773 A2.
- the transport device is designed as a pneumatic transport device.
- the pneumatic transport device on a first transport gas line, which is coupled to the pneumatic branch transport of the measuring body and targets from the memory branch in the direction of multi-way valve to the memory branch.
- the pneumatic transport device may have a second transport gas line which can be coupled to the instrumentation finger for pneumatically transporting the measuring bodies and targets from the instrumentation finger via the reactor branch in the direction of the multi-way valve.
- the pneumatic transport device may comprise a third transport gas line which can be coupled with the measuring device for pneumatically transporting the measuring bodies and targets out of the measuring device via the measuring branch in the direction of a multi-way valve.
- the pneumatic transport device can additionally comprise a fourth transport gas line which can be coupled to the insertion device for this purpose.
- the various transport gas lines can all be connected to a common transport gas source.
- transport gas in particular compressed air or nitrogen come into consideration.
- the pneumatic transport device is preferably designed to provide the transport gas at a pressure in the range of at least 5 bar, in particular at least 8 bar, preferably at least 10 bar, and / or to convey it through the transport gas lines and the line system.
- the device for reducing the pressure in the line system, in particular for removing transport gas from the storage branch, from the reactor branch and / or from the measuring branch, the device according to a further advantageous embodiment of the invention, an exhaust device.
- the exhaust device may each have at least one exhaust pipe, the ends in the memory branch, the measuring branch and / or the reactor branch.
- the exhaust device may each have at least one exhaust pipe which can be coupled to the instrumentation finger and / or the measuring device in order to remove transport gas during the transfer of targets or measuring bodies into the instrumentation finger or into the measuring device.
- For opening and closing can be provided in each case at least one shut-off valve in one or more of the exhaust pipes.
- the respective exhaust gas lines can open into the first, second, third or fourth transport gas line, so that part of the respective transport gas lines are used bidirectionally both for supplying and for discharging transport gas. Furthermore, provision may be made for the exhaust device to have an exhaust pipe opening into the multiway fitting.
- the multi-way valve can also be designed to connect in a sixth switching position the reactor branch with the opening into the multi-way valve exhaust pipe flow.
- the exhaust pipe opening into the multi-way valve advantageously serves to discharge transport gas from the reactor branch, if it is not fluidly connected to any other branch of the pipe system.
- At least two exhaust pipes are preferably combined via a multi-way valve in a common exhaust pipe.
- a coupled into the first Transportgas effet via a 3/2-way valve exhaust pipe for discharging transport gas from the storage branch and an opening into the multi-way valve exhaust pipe can be combined into a common exhaust pipe.
- the one or more exhaust pipes or common exhaust pipes preferably terminate in an exhaust filter to filter out any contaminants from the transport gas passing through the reactor core.
- the transport gas lines and exhaust pipes have a smaller diameter than the branches of the pipe system or as the targets and measuring body.
- the transport gas lines and exhaust pipes preferably have a diameter of at most 1 .5 mm.
- the transport gas lines and exhaust pipes may have a local taper, which has a smaller diameter than the branches of the line system or as the targets and measuring body.
- fluid-permeable retaining elements for example sieves, grids or nets, for retaining targets and measuring bodies are arranged in the transport gas lines and exhaust gas lines.
- the multi-way valve can also be designed to decouple in terms of flow in a seventh switching position all branches of the line system from each other, ie to block all branches for the transport of targets and / or measuring bodies.
- This switching position also advantageously increases the reliability of the device.
- the device for unpressurized removal of the targets from the conduit system in a removal container is formed.
- the removal branch is arranged in the vertical direction below the multi-way fitting and is preferably formed monotonically falling, so that the targets exclusively gravitationally driven through the multi-way fitting by the removal branch can be transferred to a removal container.
- the reactor branch for the unpressurized, exclusively gravitational driven removal of targets, the reactor branch, as described below, preferably has a monotonously falling transfer section which opens directly into the multi-way valve.
- the unpressurized removal can also be dispensed with a transport gas discharge in the region of the removal branch or removal container, which on the one hand reduces the technical complexity and on the other hand, the risk of contamination.
- the reactor branch a, in particular monotonically falling transfer section.
- the transfer section opens directly into the multi-way valve.
- the transfer section can be used to separate nuclide activation targets from so-called dummy targets or different targets of an activation batch from one another.
- Dummy targets are target bodies which are inserted as placeholders together with the nuclide activation targets to be irradiated into the instrumentation finger in order to position the targets to be irradiated in the correct position along the instrumentation finger in accordance with the power density distribution in the reactor.
- a chain of targets and dummy targets, or a chain comprising at least two target types, which is implemented via the reactor branch, can be kept in the transfer section for the purpose of separation.
- the device preferably has a blocking device, such as a switchable magnetic stop, in order to retain targets, measuring bodies and / or dummy targets in the direction of a multi-way valve.
- the blocking device can also be realized by the multi-way valve itself.
- the separation of the dummy targets from the actual targets or separation of different target types can be carried out magnetically.
- the targets or dummies or at least one target type comprise a magnetic material.
- the device may have at least one holding magnet along the transfer section, for example at least one electromagnet or at least one switchable or slidably disposed permanent magnet.
- the at least one electromagnet by activating the at least one electromagnet, the respectively magnetic target bodies of a target chain temporarily parked in the transfer section can be held in place while the respective non-magnetic target bodies Magnetic target body of the target chain can be transferred to another area of the conduit system or from the conduit system.
- the device according to a further advantageous embodiment of the invention in the reactor branch have a pregnant or partly oradedsepar Schluvia- device.
- This preferably comprises an intermediate removal fitting in the reactor branch into which a reactor-side section of the reactor branch, an intermediate removal section of the reactor branch extending in the direction of a multiway fitting, an exhaust pipe and an intermediate removal branch open, which forms an additional branch of the pipe system.
- the intermediate sampling valve is designed to in a first switching position the reactor-side section with the pregnantent Spotify- section of the reactor branch, in a second switching position the bacteriaent Cyprus- section of the reactor branch with the intermediate sampling branch and in a third switching position for the purpose of pressure reduction the intermediate removal section the exhaust pipe to connect flow.
- the embent Spotify- valve is also designed to seal off in a fourth switching position, at least the intermediate removal portion, preferably also the intermediate removal branch and / or the reactor-side portion.
- the intermediate removal section may have an apex in the transition between a first and a second monotonically falling section of the intermediate extraction section, with the first section opening into the intermediate extraction fitting ,
- the length of the first subsection of the chain length preferably corresponds to the (partial) amount of dummy targets, targets or measuring bodies to beproofsepar Schl.
- the intermediate removal branch is preferably arranged below the intermediate removal fitting in the vertical direction and preferably also monotonically falling at least along a section extending from the intermediate removal fitting.
- the intermediate removal device described above advantageously makes it possible to dispense with dummy targets for the purpose of target positioning in the instrumentation finger.
- the instrumentation finger can be filled by means of the device according to the invention over its entire length with nuclide activation targets.
- Targets that have been inadequately activated due to their particular end position in the instrumentation finger can be separated from sufficiently activated targets by means of the previously described intermediate collection device and retrieved separately to reinsert them into the instrumentation finger for full activation (preferably to another position in the instrumentation finger with higher power density).
- the partially activated targets can be transferred, for example via the intermediate sampling branch into a receptacle, which in turn can be coupled to an insertion branch of the line system for re-insertion into the instrumentation finger.
- the intermediate removal branch can also be conductively connected to the insertion branch.
- the device can have at least one holding magnet in a section of the storage branch, in particular in the shielded section of the storage branch, for example at least one electromagnet or at least a switchable or slidably disposed permanent magnet. In this way, separation of possibly used dummy targets from the actual targets or separation of different target types can be carried out magnetically.
- the shut-off valve in the case of a reactor-side leakage in the piping system for immediate Abriegeln the remaining parts of the piping system, the rab the rab, the reakto beyond the Absperrventils located areas of the device zugordnet.
- areas outside the reactor can be safely separated from the area inside the reactor, so that contamination of the area outside the reactor by boiling water, steam or the like can be avoided from the reactor.
- the shut-off valve thus creates a physical boundary between different operational safety classes, so that the parts of the device that lie beyond the shut-off valve can be classified into a lower safety class.
- the shut-off valve therefore, not only the reliability can be increased, but also the safety-related effort for a large part of the device can be significantly reduced.
- the device may further comprise at least one humidity sensor and / or at least one pressure sensor.
- the at least one humidity sensor and / or the at least one pressure sensor is arranged in an exhaust pipe of the device.
- the device is designed for selectively transferring nuclide activation targets and measuring bodies into or out of a plurality of instrumentation fingers.
- the line system of the device for each Instrumentationsfinger each have at least one reactor branch, a memory branch and a measuring branch and optionally a removal branch and / or optionally an insertion branch.
- the respective branches associated with one instrumentation finger preferably form a sub-line system. All of the advantages, features and particular embodiments of the conduit system described above with regard to the use of an instrumentation finger can be transferred to the respective branches associated with an instrumentation finger.
- the respective branches associated with an instrumentation finger can lead to a multiway fitting in one of the previously described variants.
- exactly one multi-port valve of the type described above can be provided for each sub-line system. It is also conceivable, however, that the device has at least one multi-port fitting into which the branches of at least two, in particular exactly two, sub-line systems open and which in each case connects the branches of one of the sub-line systems in the manner described above. As a result, space for the transport device is advantageously saved.
- the multi-way valve may be formed as a rotary valve with a fitting housing and a rotatable adjusting element, wherein the fitting housing has at least six, in particular exactly six connection points and the rotatable adjusting element has at least a first and a second, in particular only a first and a second passage, each curved in a 120 ° arc and are arranged mirror-symmetrically to each other.
- two reactor branches, two memory branches and two measuring branches can open into such a multi-way valve, wherein in each case a reactor branch, a memory branch and a measuring branch are assigned to one of the instrumentation fingers and form a sub-line system.
- the multi-way valve in each case connects a reactor branch optionally with an associated memory branch or an associated measuring branch.
- the device for operating a plurality of instrumentation fingers has a multi-way valve block having a plurality, in particular at least two or three, preferably exactly two or exactly three multi-way valves according to the present invention, which are each designed to realize various switching positions.
- the multi-way valve block may in particular a plurality of valve body and a plurality of movable, in particular displaceable or rotatable adjusting elements, which are each received in one of the valve body, in particular mounted and having one or more passage channels.
- a valve body and a control element incorporated therein each realize a multi-way valve.
- the multi-way valve block may also have a common valve body and a plurality of movable, in particular displaceable or rotatable adjusting elements, which are each received in the common valve body, in particular mounted and each having one or more passageways, each of the plurality of control elements a multi-way valve realized.
- at least two, in particular all adjusting elements are connected to one another in such a way that they are jointly movable, in particular displaceable or rotatable, for example, from a common actuator into different switching positions.
- Each of the multiple valve body or the common valve body of the multi-way valve block can have for each realized multi-way valve a plurality of connection points at which the branches of a sub-line system open into the multi-way valve block.
- connection points at which the branches of a sub-line system open into the multi-way valve block.
- the apparatus may further comprise for each one or more of each instrument branches associated with an instrumentation finger a pregnant woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman's milk, a nursing woman, a nursing woman'sonic or mechanical transport device.
- the transporting of the measuring bodies and targets in the respective sub-pipe systems preferably takes place independently of one another.
- the device may have a separate exhaust system or a common exhaust system for all sub-pipe systems, which is connected to the sub-pipe systems via corresponding exhaust pipes.
- the exhaust gas discharge for the respective sub-pipe systems is preferably carried out independently.
- the exhaust device for each sub-pipe system having one or more gas valves.
- the device may be arranged along a respective section of the memory branches and / or a respective section of the measuring branches, in particular along respective ones Parkierabête having a shield.
- the shield may be formed separately for each section of the memory branches and / or measuring branches.
- a common shield is provided along all the sections of the memory branches to be screened.
- a common shielding is preferably provided along all sections of the measuring branches to be screened, in particular along all the parking sections.
- Another aspect of the invention relates to a system for selectively performing nuclide activations and measurements by means of measuring bodies in an instrumentation finger of a nuclear reactor.
- the system comprises a device for transferring nuclide activation targets and measuring bodies according to the present invention and as described above.
- the system further comprises a measuring device for determining a property of the measuring bodies which is variable by energetic excitation in the nuclear reactor, the measuring device being coupled on the end to the measuring branch of the device.
- a further aspect of the invention relates to a method for activating nuclide activation targets and optionally for energizing measuring bodies in an instrumentation finger of a nuclear reactor using a device for transferring the nuclide activation targets and measuring bodies according to the present invention and as described above.
- the method comprises the following steps:
- the introduction of unirradiated targets can, for example, take place via an insertion branch, which opens one end into the multi-way valve and is coupled to other ends at an insertion device.
- the transfer of the targets from the introduction branch can take place directly into the reactor branch or alternatively indirectly via the storage branch, wherein the targets are first transferred into the storage branch via the multi-way fitting located in the third switching position and then, after switching over the multipath Armature in the first switching position - be transferred from the storage branch via the multi-way valve in the reactor branch and further into the instrumentation finger.
- the memory branch may preferably be coupled at its end facing away from the multi-way fitting to an insertion device, as described above, from which the unirradiated targets are subsequently transferred into the instrumentation finger via the storage branch, the multi-way fitting and the reactor branch.
- the transfer of the targets into the instrumentation finger is preferably carried out pneumatically by means of transport gas.
- the method may further comprise the following steps:
- the multi-way fitting Before transferring the targets from the instrumentation finger into the storage branch, the multi-way fitting is brought into the first switching position. After this transfer and before transferring the measuring bodies from the measuring device to the Instrumentation finger is brought the multi-way valve in the second switching position. After the return transfer of the measuring body into the measuring device and before the return transfer of the targets from the storage branch into the instrumentation finger, the multi-way valve is returned to the first switching position.
- the measuring bodies Before and / or after transferring the measuring bodies into the measuring device, the measuring bodies can be parked in the measuring branch, in particular in a parking section of the measuring branch.
- the device preferably has a shield against ionizing radiation along the parking section.
- the method may further comprise the following steps:
- the multiway fitting is brought into the third switching position.
- the irradiated targets can be transferred from the reactor branch via the multiway fitting into the storage branch and then the irradiated targets are transferred from the storage branch via the multiway fitting and the removal branch into the removal branch coupled extraction container may be provided.
- the multi-way valve is brought into the first switching position and, for the transfer from the storage branch into the removal branch, into the (alternative) third switching position.
- the irradiated or activated targets can also be removed via the storage branch.
- the method may include the following steps:
- the nuclide activation targets may have, for example, 98-Mo (molybdenum), 176-Yb (ytterbium) and / or 51 -V (vanadium) as activatable matter. Further details, features and advantages of the present invention will become apparent from the following description and the accompanying drawings, in which exemplary embodiments of the invention are explained.
- FIG. 1 shows a first embodiment of a device according to the invention for selectively transferring nuclide activation targets and measuring bodies into or out of an instrumentation finger of a nuclear reactor;
- Fig. 2a-2g different switching positions of the multi-way valve used in the apparatus of Figure 1;
- FIG 3 shows a second embodiment of a device according to the invention for selectively transferring nuclide activation targets and measuring bodies into or out of an instrumentation finger of a nuclear reactor;
- FIG. 4 shows a second exemplary embodiment of a device according to the invention for selectively transferring nuclide activation targets and measuring bodies into or out of a plurality of instrumentation fingers of a nuclear reactor;
- Fitting. 1 shows a schematic representation of a first exemplary embodiment of a device 1 according to the invention for the selective transfer of nuclide activation targets and measuring bodies into or out of an instrumentation finger 110 of a commercial nuclear reactor 100.
- the device 1 permits on the one hand the operational regulations for carrying out so-called spherical shot measurements , which serve to determine the power density distribution or the neutron flux in the reactor core, and, on the other hand, to use the radiation emitted by the nuclear fuel rods 101 to irradiate nuclide activation targets in the intermediate measurement-free periods.
- the device 1 comprises a conduit system 2 for receiving and transporting the measuring bodies and targets, which comprises a plurality of in a multi-way valve 60-opening line branches 10, 20, 30, 40, 50, via the switchable multiway armature 60 optional can be brought into fluid communication with each other.
- the line system 2 comprises a reactor branch 10, which is coupled to the instrumentation finger 110 via an end-side coupling 11 in the region of a so-called cable bridge 130 of the nuclear reactor 100.
- the line system 2 further comprises a memory branch 20 for temporarily storing the measuring bodies or targets and a measuring branch 30, which via an end-side coupling 31 to a measuring device 300, in particular a so-called, for example from US 3,717,114 known measuring table, for determining the activity of the measuring body is coupled.
- the line system 2 comprises an insertion branch 50, which can be coupled by means of an end-side coupling 51 to an insertion device 500, for example a transport container, in order to introduce new, unirradiated targets into the line system 2.
- the conduit system 2 further has a removal branch 40, via which the irradiated targets can be transferred into a removal container 400.
- FIGS. 2a-2g show details of the multiway fitting 60 according to the present embodiment.
- the switchable Mehrwege- armature 60 is adapted to the reactor branch 10 with the memory branch 20 (Fig. 2a) in a first switching position, the reactor branch 10 with the measuring branch 30 ( Figure 2b) in a second switching position, in a third switching position the reactor branch 10 with the Removal branch 40 (Fig. 2c), in a fourth switching position, the storage branch 20 with the measuring branch 30 (Fig. 2d), in a fifth switching position the Ein manufacturedzweig 50 with the memory branch 20 (Fig.
- the multi-way fitting 60 is designed to decouple in a seventh switching position (FIG. 2g) all branches 10, 20, 30, 40, 50 and the exhaust gas line 88 opening into the multiway fitting 60 in terms of flow.
- the multi-way fitting 60 is designed as a multi-way rotary valve, in particular as a 6/7-way rotary valve, which has a control element 66 rotatably and sealingly mounted in a fitting housing 67 , About peripherally uniformly distributed connection points open the reactor branch 10, the storage branch 20, the measuring branch 30, the removal branch 40, the Ein manufacturedzweig 50 and the exhaust pipe 88 in the fitting housing 67.
- flow connections produced by the exhaust gas line 88 are formed in the adjusting element 66 by three passage channels 63, 64, 65 which run perpendicular to the axis of rotation of the adjusting element 66, ie parallel to the plane of rotation of the adjusting element 66.
- a second passage 64 extends laterally symmetrically offset in a 120 degree arc to the first passage 63.
- a third passageway 65 extends secantily through the actuator 66, in particular asymmetrically offset from first passageway 63, opposite the second passageway 64. In the first switching position, the second passageway 64 connects the reactor branch 10 to the storage branch 20 ( Figure 2a).
- the second passage 64 In the second switching position, the second passage 64 likewise connects the reactor branch 10 with the measuring branch 30 (FIG. 2b). In the third switching position, the first through-channel 63 connects the reactor branch 10 to the removal branch 40 (FIG. 2c). In the fourth switching position, the second passage 64 connects the memory branch 20 to the measuring branch 30 (FIG. 2d). In the fifth switching position, the first through-channel 63 connects the introduction branch 50 to the memory branch 20 (FIG. 2e). In the sixth switching position, the third passageway 65 connects the reactor branch 10 to the exhaust gas line 88 (FIG. 2f). In the seventh switch position, none of the three passageways 63, 64, 65 is fluidly connected to any of the branches 10, 20, 30, 40, 50 or the exhaust conduit 88.
- the multi-way valve 60 may comprise an actuator, in particular a servomotor (not shown here). While the first and second passageway 63, 64 are designed for the passage of targets and measuring bodies, the third passageway 65 is designed exclusively for the passage of transport gas. Accordingly, the diameter of the first and second passageways 63, 64 substantially corresponds to the diameter of the branches 10, 20, 30, 40, 50 and is slightly larger than the diameter of the targets and measuring bodies. In contrast, the diameter of the third passage channel 65 is smaller than the diameter of the branches 10, 20, 30, 40, 50 and smaller than the diameter of the targets and measuring body. In this way, an unwanted passing of the targets and measuring body is prevented by the third passageway 65.
- the device 1 has a pneumatic transport device 90.
- the transport gas used is preferably nitrogen, which is provided by a transport gas source 99.
- a transport gas source 99 From the transport gas source 99 is a first transport gas line 92, which is coupled to the pneumatic branch transport of the measuring body and targets from the memory branch 20 in the direction of multi-way valve 60 end to the memory branch 20.
- the transport gas source 99 is preceded by a second transport gas line 91, which is coupled to the instrumentation finger 1 10 via a reactor-side finger gas line 120 for pneumatically transporting the measuring bodies and targets from the instrumentation finger 1 10 via the reactor branch 10 in the direction of multi-way fitting 60.
- the coupling to the finger gas line 1 10 also takes place at the cable bridge 130 of the nuclear reactor 100. Furthermore, starting from the transport gas source 99 via the second transport gas line 91 and a 3/2-way gas valve 96, a third transport gas line 93, the pneumatic Transporting the measuring body from the measuring device 300 via the measuring branch 30 in the direction of multi-way valve 60 end coupled to the measuring device 300.
- a fourth transport gas line 95 is provided, which is coupled at the end to the insertion device 50.
- the fourth transport gas line 95 branches off from the first transport gas line 92 and can be shut off with respect to this by means of a gas valve 94.
- the device 1 has an exhaust device 80, which comprises, in addition to the exhaust pipe 88, further exhaust pipes.
- a first (further) exhaust pipe 82 branches over a 3/2-way gas valve 97 in the end region of the first transport gas line 92 and serves to discharge transport gas from the storage branch 10.
- Two further exhaust pipes 81, 83 branches from the second and third Transport gas line 91, 93 and serve to discharge transport gas from the Instrumentationsfinger 1 10 and the measuring device 300.
- the two exhaust pipes 81, 83 are each guided via a 3/2-way gas valve 87 in the exhaust pipe 88.
- the exhaust pipe 88 and thus also the two exhaust pipes 81, 83 and the exhaust pipe 82 terminate in an exhaust filter 89, in which the discharged transport gas is freed from any contamination.
- the device 1 can be operated as follows.
- unirradiated targets are transferred via the Ein 1500zweig by opening the valve 94 by means of transport gas from the container 500 via the Einzhouzweig 50 and the multi-way valve 60 into the memory branch 20.
- the multiway fitting 60 is in the fifth switching position.
- the valve 94 is closed and the multi-way valve 60 is transferred to the first switching position to the storage branch 20 with the reactor branch 10th connect to.
- the targets can be temporarily parked in the memory branch 20.
- transport gas is introduced into the finger gas line 120 via the transport gas line 91 in the reverse order by closing the valve 87 and opening the valve 96, as a result of which the partially activated targets are transferred from the instrumentation finger 1 10 via the reactor branch 10 and the multiway valve 60 into the storage branch 20 become.
- this is in turn connected via the valve 97 and the exhaust pipe 82 to the exhaust filter 89.
- that section 22 of the memory branch 20 in which the partially irradiated targets are parked is preferably provided, as shown in FIG. 1, with a shield 23 against ionizing radiation.
- the multi-way valve 60 is then brought into the second switching position. Subsequently, transport gas is introduced into the measuring device 300 via the valve 96 and the transport gas line 93 in order to transfer the measuring bodies via the measuring branch 30, the multi-way valve 60 and the reactor branch 10 into the instrumentation finger 110. For pressure reduction in the instrumentation finger 1 10 this in turn via the transport gas line 91, the exhaust pipe 81, the valve 87 and the exhaust pipe 88 is connected to the exhaust filter 89. After irradiation of the measuring body they are transferred in reverse order by closing the valve 87 and opening the valve 96 by means of transport gas from the Instrumentationsfinger 1 10 via the reactor branch 10, the multi-way valve 60 and the measuring branch 30 back into the measuring device 300.
- the activity of the irradiated measuring body can be measured to determine the power density profile of the reactor.
- the measuring device 300 is connected to the exhaust filter 89 during the return transfer of the measuring bodies via the transport gas line 93, the exhaust line 83, the valve 87 and the exhaust line 88.
- the activation of the partially irradiated targets can be continued.
- the targets are - in accordance with the procedure described above - from the memory branch 20 back into the instrumentation finger 1 10 transfiert.
- the targets After the complete activation of the targets, they are first transferred for removal from the line system into the monotonously falling transfer section 12 of the reactor branch 10, the length of which corresponds at least to the length of the chain of the targets lined up in the line system.
- the valve 87 is closed and the valve 96 is opened to admit transport gas via the transport gas line 91 and the finger gas line 120 into the instrumentation finger 1 10.
- the multi-way valve 60 is in the sixth switching position in order to connect the reactor branch 10 with the exhaust gas line 88 and the exhaust gas filter 89. In this switching position, the targets are retained by the multi-way fitting 60 acting as a stop.
- the multi-way valve 60 After closing the transport gas supply via the valve 96 and pressure reduction in the reactor branch 10, the multi-way valve 60 is brought into the third switching position, whereby the reactor branch 10 is connected to the removal branch 40. In this way, the targets can be transferred without pressure and exclusively gravitationally driven from the monotonously falling transfer section 12 of the reactor branch 10 via the multi-way valve 60 and the vertically arranged below it, also monotonically falling withdrawal branch 40 into the provided removal container 400.
- the device 1 in the removal branch 40 on a shut-off valve 42 for gas-tight shut-off of the removal branch 40 is minimized in an advantageous manner.
- the device 1 in the reactor branch 10 has a shut-off valve 4 for the gas-tight shut-off of the reactor branch 10.
- the shut-off valve 4 is in the case of a reactor-side leakage in the conduit system 2 for immediate locking of the remaining parts of the conduit system, which are assigns the reactor remote, located beyond the check valve 4 areas of the device 1.
- one or more electromagnets 7 serving to hold magnetic targets or dummy targets can be arranged along the transfer section 12 for the purpose of separating any dummy targets that may be used.
- FIG. 3 shows a second exemplary embodiment of the transfer device 1 according to the invention, which essentially differs from the exemplary embodiment according to FIG. 1 only by an additional intermediate removal device 70 in the reactor branch 10. In the following, therefore, only this difference will be discussed. Otherwise, the same reference numerals are used in FIGS. 1 and 3 for both embodiments for identical or similar features.
- the intermediate removal device 70 present in the second exemplary embodiment according to FIG. 3 comprises an intermediate removal fitting 71 into which a reactor-side section 13 of the reactor branch 12, an intermediate removal section 14 of the reactor branch 10 extending in the direction of a multi-way fitting 60, an intermediate removal device. Branch 72 and an exhaust pipe 85 open.
- the exhaust pipe 85 is connected via the exhaust pipe 88 to the exhaust filter 89.
- the intermediate removal fitting 71 connects the reactor-side section 13 with the intermediate removal section 14 of the reactor branch 10, in a second switching position the intermediate removal section 14 with the intermediate removal branch 72 and in a third switching position the intermediate removal section 14 in order Pressure reduction with the exhaust pipe 85.
- the intermediate extraction fitting 71 locks completely.
- the intermediate extraction section 14 For separating a (partial) set of dummy targets or targets, the intermediate extraction section 14 has an apex 17 in the transition between a first and a second monotone falling section 15, 16.
- the (partial) amount of dummy targets or targets to be cut off accumulates in the first section 15, while FIG the non-extractable (partial) quantity beyond the apex 17 is located in the second subsection 16.
- Abzuseparierende or to be removed (partial) amount gravitationally driven in the intermediate sampling branch 72 and further into an intermediate sampling container 700 while the not to be removed (partial) amount in the second section 16 remains.
- FIG. 4 shows a third exemplary embodiment of the transfer device 1001 according to the invention, which differs from the exemplary embodiments according to FIGS. 1 and 3 in that the conduit system assigned to an instrumentation finger does not have a separate insertion branch and withdrawal branch, which respectively open into the multiway fitting. Instead, in this exemplary embodiment, the introduction of the unirradiated targets and the removal of the irradiated or activated targets are respectively effected via the memory branch 1020a, 1020b assigned to an instrumentation finger.
- the respective memory branch 1020a, 1020b allocated to an instrumentation finger can be coupled at its end facing away from the multi-way valve to a combined insertion-removal device which comprises a shielding transfer container 1400.
- a shielding transfer container 1400 From this container 1400, unirradiated targets can be introduced, for example, by means of compressed air into the storage branch, and, conversely, targets activated after the irradiation are ejected from the storage branch into the transfer container 1400.
- the memory branches 1020a, 1020b assigned to each instrumentation finger have a shielded section 1022a, 1022b in which targets can be buffered.
- the transfer device has for this purpose a common shield 1023 against ionizing radiation, which surrounds the shielded sections 1022a, 1022b of all storage branches.
- each memory branch 1020a, 1020b may further comprise a blocking device (not shown), for example a magnetically actuatable stop, such as a pin, pin or pin, for blocking the transport path through the storage branch.
- a blocking device for example a magnetically actuatable stop, such as a pin, pin or pin, for blocking the transport path through the storage branch.
- electromagnets can be arranged, which serve to hold magnetic targets or dummy targets and thus enable a separation of targets and dummy targets.
- the multi-way fitting 1060 is designed as a rotary valve, which has a fitting housing 1067 with six connection points and an actuating element 1066 rotatably mounted therein having.
- a first passageway 1068 and a second passageway 1069 are formed, each curved in a 120 ° arc and are arranged mirror-symmetrically to each other.
- two reactor branches 1010a, 1010b, two memory branches 1020a, 1020b and two measuring branches 1030a, 1030b are connected, wherein in each case a reactor branch 1010a, 1010b, a memory branch 1020a, 1020b and a measuring branch 1030a, 1030b one of the instrumentation fingers 1 1 10a , 1 1 10b and thus form a sub-line system 1002a, 1002b.
- this multi-way valve 1060 connects in each case a reactor branch 1010a, 1010b optionally with an associated memory branch 1020a, 1020b or an associated measuring branch 1030a, 1030b.
- an exhaust pipe for degassing the valve body opens into the multi-way valve.
- the transfer apparatus 1001 according to FIG. 4 differs from those of FIGS. 1 and 3 in that the apparatus 1001 in the measuring branches 1030a, 1030b each have a parking section 1032a, 1032b for temporarily parking the measuring bodies or targets.
- the device 1001 also has a shield 1033 against ionizing radiation.
- the measuring body at those times in which no measurement is performed, in the respectively an instrumentation finger 1 1 10a, 1 1 10b associated Parkierabêt 1032a, 1032b in shielded conditions, zwupuparken.
- a blocking device or holding device may be provided, for example a magnetically actuatable stop or an electromagnet, in order to move the transport path from the parking sections 1032a, 1032b into the multiway path.
- the transfer device 1001 according to FIG. 4 also has in each of the reactor branches 1010a, 1010b a shut-off valve 1004a, 1004b for the gas-tight shut-off of the respective reactor branch 1010a, 1010b.
- the transfer apparatus 1001 according to FIG. 4 like the two other embodiments, has the subsystem for transporting the measuring bodies and targets.
- Line systems 1002a, 1002b a preferably common pneumatic transport device 1090 and a preferably common exhaust device 1080 on.
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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BR112020007664A BR112020007664A8 (pt) | 2017-11-02 | 2018-10-25 | dispositivo para seletivamente transferir alvos de ativação de nuclídeo e método para a ativação de alvos de ativação de nuclídeo |
EP18789183.3A EP3704718B1 (de) | 2017-11-02 | 2018-10-25 | Vorrichtung und verfahren zum wahlweisen durchführen von nuklidaktivierungen und messungen in einem kernreaktor mittels nuklidaktivierungs-targets und messkörpern |
CA3080075A CA3080075C (en) | 2017-11-02 | 2018-10-25 | Device and method for selectively carrying out nuclide activations and measurements in a nuclear reactor by means of nuclide activation targets and measuring bodies |
CN201880071207.4A CN111316375B (zh) | 2017-11-02 | 2018-10-25 | 通过核素激活靶和测量体在核反应堆中选择性地进行核素激活和测量的设备和方法 |
ES18789183T ES2883695T3 (es) | 2017-11-02 | 2018-10-25 | Dispositivo y procedimiento para realizar selectivamente activaciones y mediciones de nucleidos en un reactor nuclear utilizando dianas de activación de nucleidos y cuerpos de medición |
Applications Claiming Priority (2)
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EP17199688.7 | 2017-11-02 | ||
EP17199688 | 2017-11-02 |
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WO2019086329A1 true WO2019086329A1 (de) | 2019-05-09 |
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PCT/EP2018/079322 WO2019086329A1 (de) | 2017-11-02 | 2018-10-25 | Vorrichtung und verfahren zum wahlweisen durchführen von nuklidaktivierungen und messungen in einem kernreaktor mittels nuklidaktivierungs-targets und messkörpern |
Country Status (6)
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EP (1) | EP3704718B1 (de) |
CN (1) | CN111316375B (de) |
BR (1) | BR112020007664A8 (de) |
CA (1) | CA3080075C (de) |
ES (1) | ES2883695T3 (de) |
WO (1) | WO2019086329A1 (de) |
Cited By (2)
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WO2021233545A1 (en) | 2020-05-20 | 2021-11-25 | Framatome Gmbh | Installation and method for producing activated irradiation targets in an instrumentation tube system of a nuclear reactor |
CN113892152A (zh) * | 2019-05-23 | 2022-01-04 | 法玛通股份有限公司 | 从核反应堆和放射性核素生成系统中移除辐照靶的系统和方法 |
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- 2018-10-25 ES ES18789183T patent/ES2883695T3/es active Active
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WO2021233545A1 (en) | 2020-05-20 | 2021-11-25 | Framatome Gmbh | Installation and method for producing activated irradiation targets in an instrumentation tube system of a nuclear reactor |
EP4187555A1 (de) | 2020-05-20 | 2023-05-31 | Framatome GmbH | Anlage und verfahren zur herstellung aktivierter bestrahlungsziele in einem instrumentationsrohrsystem eines kernreaktors |
Also Published As
Publication number | Publication date |
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CA3080075A1 (en) | 2019-05-09 |
BR112020007664A2 (pt) | 2020-10-06 |
EP3704718B1 (de) | 2021-06-09 |
BR112020007664A8 (pt) | 2020-10-27 |
CN111316375A (zh) | 2020-06-19 |
ES2883695T3 (es) | 2021-12-09 |
EP3704718A1 (de) | 2020-09-09 |
CN111316375B (zh) | 2024-02-27 |
CA3080075C (en) | 2023-04-04 |
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