14 results about "Scintillation counter" patented technology

The invention relates to a method for testing the tritium release rate of a tritium-containing waste package, and the method comprises the steps: guiding tritium-containing waste gas released by the tritium-containing waste package in an exhaust hood to be continuously input into an ionization chamber online monitoring system, and determining the initial tritium activity concentration; when the first threshold value is lower than the first threshold value, the tritium-containing waste gas flows into an initial bubbling sampler after passing through a refrigerating system to collect tritiated water, and target gas is obtained; enabling the target gas to circularly pass through the operation of the initial bubbling sampler, and replacing a new bubbling sampler every time a first preset time is reached; after a second preset time is reached, stopping the cyclic operation, and testing the target tritium activity concentration of liquid in the bubbling sampler which is replaced for multiple times and the current bubbling sampler by adopting a liquid scintillation counter; and calculating the tritium release rate based on the target tritium activity concentration. Target gas is discharged into the exhaust hood again, tritiated water absorption is carried out on tritium-containing waste gas multiple times, and the technical effects that tritiated water absorption is more complete due to multiple times of cyclic absorption, and the tritium release rate detection result is more accurate are achieved.

The embodiment of the application discloses a multiple-redundancy safety interlocking control system and a liquid scintillation counter; the system comprises a lead chamber push door, a lead chamber push door slide, a lead chamber push door traction rod connected with the lead chamber push door and used for traction of the lead chamber push door movement, a fixed plate corresponding to the lead chamber push door, a lead chamber push door driving assembly installed on the fixed plate and used for driving the lead chamber push door traction rod, a first photoelectric switch assembly and a second photoelectric switch assembly; the control logic is as follows: if the lead chamber push door is closed, the first photoelectric switch assembly is turned on, and "1" is input to the "and" gate logic circuit of the control relay; the control assembly receives the power-on instruction of the photoelectric detector, detects that the second photoelectric switch assembly is turned on, inputs "1" to the "and" gate logic circuit, the output of the "and" gate logic circuit is "1" at this time, the relay is turned on, and the photoelectric detector is powered on; if the photoelectric detector power-on instruction is accidentally issued, the lead chamber push door is not closed, the second photoelectric switch assembly is not turned on, and the power-on instruction is not executed.

1. The name of this design product: Portable multi-sample liquid scintillation counter. 2. Application of this product design: Used for measuring low levels of 3H, 14C and other α and β nuclides in the nuclear power, environmental protection, medical and other industries. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 3D drawing. 5. Designate Design 1 as the base design.

The application belongs to the technical field of radioactivity measurement, and relates to a data processing method for alpha and beta discrimination measurement of a liquid scintillation counter. α and tau β and calculates total error discrimination rate; step S2, confirming optimal discrimination parameters by using total error discrimination rate; step S3, evaluating alpha / beta discrimination effect by using minimum value of total error discrimination rate and half-peak width of the curve of total error discrimination rate and discrimination parameters; step S4, obtaining a scintillation signal pulse length distribution diagram, and using displacement and slope change of tau α curve and tau β curve to indicate change of scintillation signal pulse length and its probability distribution; and step S5, using trend change of the probability distribution diagram of scintillation signal pulse length to identify alpha signals of a sample. The application realizes comparison of alpha / beta discrimination measurement data under different conditions and comparison of change of scintillation signal pulse length and its probability distribution, and is helpful to optimization of alpha / beta discrimination measurement technology and improvement of reliability of measurement results.

1. The name of this design product: Portable single-sample liquid scintillation counter. 2. Application of this product design: Used for measuring low levels of 3H, 14C and other α and β nuclides in the nuclear power, environmental protection, medical and other industries. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model relates to a sample box and a liquid scintillation counter, comprising a housing, the housing comprises an accommodating cavity, the accommodating cavity is internally provided with a temperature adjusting member, a controller and a first conducting strip, and the temperature adjusting member and the first conducting strip are both connected with the controller; and the accommodating part is provided with an accommodating hole, the accommodating part is in sliding connection with the shell and can be located in the accommodating cavity, one side of the accommodating part is provided with a conductive plate, and the conductive plate can abut against the first conductive sheet. According to the sample box and the liquid scintillation counter, samples can be prevented from being illuminated in the storage and moving process.

The present invention relates to a method for comparing the luminous efficiency of plastic scintillators, belonging to the field of plastic scintillator performance evaluation. The method involves placing a liquid scintillation vial containing a plastic scintillator and a point-shaped gamma radiation source into a liquid scintillation instrument for measurement, thereby obtaining a liquid scintillation spectrum. The obtained liquid scintillation spectrum is then subjected to first-order derivative processing to find the channel value C corresponding to the lowest point of the first-order derivative. The luminous efficiency of the plastic scintillators is then compared by comparing the channel values ​​C. The method disclosed in the present invention allows for comparison of the relative luminous efficiency of plastic scintillators using a commonly available commercial liquid scintillation counter in laboratories. The method is simple, easy to operate, highly practical, and has strong advantages for widespread adoption.

The embodiment of the utility model discloses an ultra-low background liquid scintillation counter, which comprises three main photomultipliers which are radially arranged in the same horizontal plane at equal intervals, and a counting chamber for measurement is formed among the end parts of the three main photomultipliers; the number of the auxiliary photomultipliers is three, each auxiliary photomultiplier is arranged between two adjacent main photomultipliers at equal intervals, and the auxiliary photomultipliers and the main photomultipliers are arranged in a one-to-one correspondence mode and located in the same horizontal plane. Three through hole structures which are arranged at equal intervals are arranged on the side wall of the plastic scintillator at intervals and are used for adaptively arranging the three main photomultipliers, and three concave structures which are arranged at equal intervals are arranged on the side wall of the plastic scintillator at intervals and are used for adaptively arranging the end parts of the auxiliary photomultipliers; a lead shield; the photomultiplier has a shape and a structure matched with the main photomultiplier, the auxiliary photomultiplier and the plastic scintillator; a copper lining layer is adaptively arranged between the lead shielding body and the plastic scintillator; and the outer shell is adaptively arranged outside the lead shielding body.

The embodiment of the present application provides an analysis measurement method for measuring the tritium concentration in a spent fuel dissolving solution, and the analysis measurement method comprises the following steps: diluting and distilling the spent fuel dissolving solution to obtain a distillation distillate; adding the distillation distillate into a tritium column for filtering to obtain a target solution; adding a liquid scintillation liquid into the target solution for mixing, and obtaining a measurement result through a liquid scintillation counter; and obtaining the tritium concentration according to the measurement result. The analysis method of the embodiment of the present application has high accuracy in measuring the tritium concentration in the spent fuel dissolving solution.

The utility model relates to a sample detection device, which comprises a detection part, a sample detection part and a sample detection part, the supporting plate is provided with a guide channel, the supporting plate is connected with a first guide pipe, the first guide pipe is located in the detection channel, the guide channel is communicated with the first guide pipe, the end of the first guide pipe is slidably connected with a movable block, and the movable block is provided with an air hole; a moving chain is in sliding connection with the supporting plate and the first guide pipe, and the moving chain can extend into the detection channel and abut against the movable block; the output end of the first driving part is connected with the moving chain; the output end of the second driving piece is connected with a movable rod in a matched mode, the movable rod can slide in the first guide pipe and the guide channel, and the calibration piece is connected to the end of the movable rod; a cleaning plate is connected with the supporting plate, the cleaning plate is provided with a cleaning channel, and a connecting valve is arranged at the end of the cleaning channel. The sample detection device disclosed by the utility model can be used for quickly cleaning the liquid scintillation counter.

1. The name of the design product: liquid scintillation counter. 2. The use of the design product: the design product is used in liquid scintillation counter measuring equipment. 3. The design points of the design product: the combination of shape and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design for which protection is sought includes color. 6. Other circumstances that need to be explained: the material of the design product is mainly aluminum plate, and the surface is subjected to anodic oxidation and sand blasting treatment.

The embodiment of the invention discloses an alpha and beta particle discrimination method and system based on a liquid scintillation counter. The system comprises a signal detection module used for detecting alpha and beta particle electric signals; the signal shaping circuit module is connected with the signal detection module and is used for shaping the detected alpha and beta particle electric signals; a peak holding circuit module; the peak holding module is connected with the signal shaping circuit module and is used for carrying out amplification peak holding processing on the shaped alpha and beta particle electric signals; a signal discrimination circuit module; the signal processing circuit module is respectively connected with the signal shaping circuit module and the peak holding circuit module and is used for identifying electric signals useful for alpha and beta particles; an FPGA data processing module; and the signal discriminating circuit module is connected with the signal discriminating circuit module and is used for discriminating the square wave signals corresponding to the alpha particles and the beta particles.

The utility model belongs to the technical field of detection, and discloses a test box and a scintillation counter, and the test box comprises a box body, a door cover and a switch assembly. A placing opening is formed in the box body. The door cover is hinged to the end, provided with the containing opening, of the box body, and an elastic sealing piece is arranged on the door cover. The switch assembly comprises an elastic piece and a locking switch, one end of the elastic piece is connected to the door cover, and the other end is connected to the box body. The locking switch is arranged on the box body and has an opening state and a closing state which can be switched. The locking switch is in a closed state, the door cover is located at the position for blocking the placing opening, a gap is formed between the door cover and the placing opening, and the elastic sealing piece is extruded in the gap; and when the locking switch is in an open state, the door cover can be bounced off by the elastic piece. The test box provided by the utility model can be easily opened without a complicated structure, and the elastic sealing element can block the gap when the locking switch is in a closed state and in a switching process, so that the sealing effect is good, and the accuracy of a detection result is ensured.

A quartz crystal rod bonding device relates to the technical field of piezoelectric crystal, including the upper and lower split setting crystal rod detection positioning mechanism, mobile material table mechanism, the mobile material table mechanism includes material plate, material plate receiving plate, translation assembly, lifting assembly, the bottom of material plate receiving plate is connected with lifting assembly, lifting assembly is connected with translation assembly through translation plate, crystal rod detection positioning mechanism includes crystal rod holder assembly, crystal rod holder adjusting assembly, X-ray tube, X-ray tube adjusting assembly, scintillation counter, rotary encoder, X-ray tube is connected with X-ray tube adjusting assembly, and crystal rod holder assembly is connected with crystal rod holder adjusting assembly. The utility model discloses the crystal rod detection positioning mechanism of upper and lower split setting, mobile material table mechanism, adopts PLC control drive element, makes detection stable, improves detection accuracy and bonding qualification rate.