RO131663A2 - Irradiating container of type a code ()2 - 80° - Google Patents

Abstract

The invention relates to an irradiating container of type A, as a component of a scanning equipment meant for customs services, army, airports and airline companies, for detection of prohibited and smuggled goods. According to the invention, the container consists of a protective block (12) made of lead outside and of wolfram inside, provided with two source holders (13 and 14) for closed radioactive sources, a protective cover (8) for operation and transport, having two locking rods (41 and 42) for transport purposes, with locking elements for source-holders (13 and 14), two limiting devices (10 and 11) for operation purposes, a transport protective cover (47) with locking elements for source-holders (13 and 14), and a rod (T) for unlocking the source-holders (13 and 14) in case of radiologic incident.

Description

The invention is a gamma radiation generating subassembly, which is part of the ROBOSCAN scanning facility, intended for customs services, the army, airports and airlines. The type A irradiation container is made in accordance with CNCAN Order no. 357/2005, contains closed radioactive sources 60-Co and Se-75, classified, according to ISO 2919, and has radiological safety authorization issued by CNCAN no. AI 1533/2012 valid 19.12.2015.

The container has two roles: the technological container of the ROBOSCAN installation and the transport container of the contained sources, from the unit that carries out the loading with the two sources closed by the radiation, to the unit that performs the commissioning, adjustment and installation on the ROBOSCAN installation, and return.

In the transport conditions, the container is equipped with a special type A transport package. In the transport package, the container can be placed both in the transport condition, without the mounted drive system, and in the scanning condition, with the mounted drive system, if the portsurse drilling rods have been fitted under working conditions.

With the help of the type A irradiating container, it is carried out the verification in the zones of customs access of the cars and luggage shootings for the detection of the prohibited and smuggled goods.

The invention represents the modernization of the Irradiating Container product for a single source. The initial container used only a Co-60 source, with a maximum activity of 1 Ci = (37GBq) and had a mass of 250 Kg and a projection screen of tungsten and lead.

The invention uses 2 sources closed by radiation, namely Co-60 with A _max - 2 Ci (74GBq) and Se-75 with A _max = 62 Ci (2.3 TBq) and has its own mass of 150 Kg, ensuring the same radiation protection conditions. as well as the single source irradiating container.

Using the 2 radiation sources: Co-60 with E = 1250 KeV and Se-75 with E = 217 KeV, it provides a much better image of the contents of both the cars and the cars, as well as the packages in the customs system (a better one). smuggling products detection).

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In this context, at present, only closed sources of Co-60 radiation, accelerators and X-ray generators are used as detection systems. X-ray accelerators and generators are linked to a power supply, which is not the case with our invention. .

The irradiating container type A is the equivalent of a system that simultaneously uses a closed source of high energy radiation (CO-60, E = 1250 KeV) and an X-ray generator (Se-75, E = 217 KeV). The system can use the two radiation sources both separately and simultaneously, depending on the type of vehicle checked, and provides a much better imaging for detecting smuggled goods. It has a much smaller net mass compared to another container existing at present and which uses only a closed source of radiation.

The container itself is made up of a protection block made of tungsten (W) and lead (Pb) (fig.l-pos. 12), provided with 2 rectilinear channels - a central one (fig.-Pos. 44). and a lateral one (Fig. 43), away from the container shaft, enclosed in a stainless steel housing (Fig. 8).

The type A irradiating container has two roles: from the technological working container of the ROBOSCAN industrial scanner type installation and the type A transport container from the radioactive sources, from the unit that carries out its loading with the two sources, to the unit that performs the installation-assembly. on the ROBOSCAN installation as well as in the case of changing the container to the user and returning to the unit that recharges with new radiation sources.

For transport, the container is equipped with 2 transport lock rods (Fig.2-pos.4142) made of stainless steel, one for each carrier (Fig.2-pos.l3-14). The locking rods are threaded into the container block. Under transport conditions, the container does not have the actuator mounted, the carriers being locked by means of nuts through a fastening device, all being provided with a stainless steel transport cover which is fastened with special screws to the body of the container.

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For operation, instead of the locking rods, the limiters of the race limiters made from the wolfram are inserted into the block (fig. 2 pos. 10-11), limiters that ensure the precise positioning of the radiation sources on the beam axis, thus ensuring the reproducibility of the source position. , the bearings being fixed by the actuating device by means of coupling rods.

The physical projection is provided by a projection cap used both during transport and during operation, made of stainless steel.

Basically, the type A irradiating container works by bringing the closed sources of Co-60 and Se-75, mounted in portsurse, near a collimator with an opening angle of 80 °.

The operation is carried out by means of a pneumatic drive system. Bringing the springs to the collimator can be done either simultaneously or separately for each sprocket with the help of coupling rods caught by threading the sprocket.

After the set exposure time has expired, the ports are mechanically restored to the shielded position. The operation of the porters is done from a distance, from a control panel of the scanning facility of which the container is part.

For the rapid intervention with ensuring the radiation protection conditions for the operators, in the case of the maximum possible radiology incident, namely "the automatic return of the porters to the safe storage position", the container is equipped with a key for loosening the access screws, with the port unlocking rod in situations of emergency (Fig.3- T) and with portsurse locking rods in working conditions.

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DRAWINGS

Figure 1 shows the configuration of the type A irradiating container in transport conditions without mounted drive system. The configuration comprises: the transport container type A (12); carriers (13-14) with closed radioactive sources; two torsion drilling rigs (43-44) with lock nuts (9); spring lock nuts (46); mounting pads (45) and protective cover (47) provided with screws security screws (4), plug for security screw (5), screw for securing the protective covers (6), grower washer (7) . The protective cover of the race limiters or the drill rods (8) has the locking screw (9), the sealing gasket (3), the stainless steel washer (2), the grower washer (7), the screws for fixing the cover caps. protection (6), stopper for the locking screw (5), locking screws (4) and threaded stopper of the cover for the limiters of the limiters or the drill rods (1).

Figure 2 shows the configuration of the irradiating container type A under scanning conditions, where besides the transport configuration it also presents the mounted drive system, system which is composed of: travel limiter Co (11), travel limiter Se (10), drive protection cover (15), drive system support (16), drive system support bracket bolt (17), pneumatic cylinder mounting bolt (18), cylinder locking bolt nut pneumatic (19), pneumatic cylinder for actuating the Se carrier (20), pneumatic cylinder for actuating the Co carrier (21), coupling rod for the Se carrier (22), coupling rod for the Co carrier (23), tubes for compressed air (24), solenoid valve for actuating the Se port carrier (25), solenoid valve for actuating the Co port (26), pneumatic sill for the irradiation position Se (27), pneumatic sill for the irradiation position Co (28), pneumatic drill for safety position Se (29), pneumatic drill for safety position Co (30), connection ζχ- 2 Ο 1 5 - - 0 0 5 0 3 13-07-2015 2) for air tablet (31), connector for electrical signals (32), LED for position indicator Se (33), LED for signal position Co (34), sensor position of the Se (35), sensor position of the sensor Co (36), pneumatic cylinder holder Se (37), pneumatic cylinder holder Co (38), pneumatic cylinder holder spacer Se (39), pneumatic cylinder holder spacer Co (40), drill rod of the Se carrier with actuator mounted (41), ball carrier rod Co with actuator mounted (42).

Figure 3 shows the type A irradiated container assembly with bolts of the carriers (41-42), in the configuration of temporary blocking of the operation, with the carriers operated (13-14), respectively with the mounted drive system and the carriers operated.

In the case of radiology incident, the carrier unlocking rod (T) is also used.

Claims (2)

1. Irradiation container type A (12) code (W-Pb) 2-80 ° with two rollers, the one of technological work container of the ROBOSCAN installation and the one of transport container type A of the radioactive sources closed by Co-60 and Se -75. (Fig. 2). 2. For transport, the container claimed in point 1 contains: two source ports for closed radioactive sources (pos. 13, 14), projection cover for work and transport (pos. 8) with 2 locking rods (for transport - pos .43-44), with port locking elements, 2 travel limiters (for work - positions 10-11), protection cap (for transport pos. 47) with port locking elements, unlocking rod (pos. T ) of the carriers in case of blockage under irradiation conditions (when the source is in the direction of the collimator) and intervention holes in case of radiology incident for the introduction of the release rod. The pneumatic drive system that is mounted during operation, is provided with a lid (item 15) and is equipped with optical warning systems, coupling jacks, electrical and pneumatic system.