АТ110 Gamma Beam Irradiator with Calibration Bench

Reference gamma beam irradiator with calibration bench is designed to simulate and transmit air kerma, exposure dose, individual dose equivalent and dose equivalent units and their respective rates into working standards and measurement instruments during verification, calibration and test procedures.

Control area (Operator room)
 
 
Application
 
Metrology support of gamma dosimetric measurements
▪ Verification and calibration in metrology service facilities
▪ Calibration procedures in Secondary Standard Dosimeter Laboratories (SSDL)
▪ Calibration of measurement instruments in the process of development, manufacturing and production
▪ Applied metrology
 
 
Features
 
▪ Typical collimating unit according to GOST 8.087-2000
▪ Revolving drum magazine with chambers for sources
▪ Software control of sources travel from exposure position to storage position
▪ Programmable control of moving platform travel in fully automatic and manual mode
▪ Digital servos for positioning of moving platform and sources
▪ Control system based on personal computer and operator panel with automatic calibration functions
▪ Lasers and calibrated gauge bars are used for detector centring in radiation beam
▪ Readouts are taken using video surveillance system or instrument interface
▪ Safe braking and trip limiting of moving platform
▪ Three power outlets (230 VAC, 50 Hz) with insulated neutral on moving platform for verified instruments
▪ Alarm and interlock system to provide secure operation of laboratory
▪ Measurement of radiation environment in working chamber and adjacent rooms
▪ Emergency power source is available
▪ Loading of sources into laboratory using transfer container and accessories
▪ Layout design and calculation of radiation parameters for client's premises
 
 
Operating principle
 
The principle of facility operation  is based on the use of 137Cs radionuclide sources.
The facility implements the irradiation schemewith fixed irradiator and  calibration bench on linear moving platform.
The range of gamma radiation dose rate values is achieved by set of sources with different activities and varying the distance between source and detector. Field shape can be changed by varying the distance between source and detector or diameter of collimator channel.
Automatic functions of irradiator and calibration bench are remotely controlled from operator room.

 

Specifications

AT110

Gamma radiation source, max. activity

137Cs – 1.3·1012 Bq (35 Ci)

Number of sources

Up to 5

Generated ranges

 

- Air kerma rate

0.25 µGy/h – 350 mGy/h

- Exposure dose rate

30 µR/h – 40 R/h

- Ambient dose equivalent rate, Individual dose equivalent rate

0.30 µSv/h – 420 mSv/h

Composition of sources and generated ranges are subject to agreement with the Customer
Intrinsic relative error for certification as a working standard of 1-st category (2-nd category)

±2.5% (±5%) [Air kerma rate and exposure dose rate]
±4.5% (±7%) [Ambient dose equivalent rate and individual dose equivalent rate]

 

Collimator channel

Ø60 mm/Ø90 mm, length 150 mm

Radiation beam axis height from floor level

(1500±30) mm

Working distances interval R

0.5 – 8 m (АТ110)

0.35 – 8 m (АТ110*)

Diameter of uniform radiation field at R=1 m

(Non-uniformity ±6%)

 

- For Ø60 mm collimator

300 mm

- For Ø90 mm collimator

450 mm

Time of source transfer into operational position

≤15 s

Radiation background at 1 m from irradiator in storage position

≤0.5 µSv/h

Reproducibility of moving platform position on Х coordinate

<0,5 mm

Absolute error of detector position in radiation beam

≤0.002R

Speed of platform travel

0.9 mm/s – 26 cm/s

Travel range of platform workbench:

 

- Vertically from floor level

1140 – 1480 mm

- Horizontally

 

- Along radiation beam axis

±50 mm

Across radiation beam axis

±140 mm

- About vertical axis with 15° steps

360°

Weight of equipment on:

 

- Workbench

≤35 kg

- Moving platform

≤75 kg

Initialisation time

≤1 min

Continuous run time

≥24 h

Power supply

(230 ±23) V, (50±1) Hz

Power consumption

 

- Facility

≤600 VA

- Auxiliary equipment

≤400 VA

Operation temperature range

15°С – 35°С

Relative air humidity

≤80%

Dimensions (maximum)

 

Irradiator

640х540х1700 mm

Base frame of calibration bench

Up to 9000х860х220 mm

Moving platform

910х855х1820 mm

Workbench

270х330 mm

Operator station equipment (footprint)

3500х1500 mm

Weight (not greater)

 

Irradiator

800 kg

Base frame of calibration bench

135 kg

Moving platform

70 kg

Transfer container

100 kg

- Operator station equipment

150 kg

Dimensions of working chamber room (minimum)

10х5х3.5 m

Complete set
 
▪ Remotely-controlled irradiator:
- Irradiator
- Control unit, control panel
- Accessories including source holders and tools for source holder assembling, transfer container, pneumatic gripper and lift
▪ Calibration bench:
- Base, moving platform, control unit, control panel
- Video surveillance system for measurements
- Laser targeting system
- Accessory set for unit performance monitoring
- Accessory set with clamps for attaching instruments to working table and 300х300х150 mm phantom
▪ Alarm and interlock system
▪ Radiation monitoring service
▪ AC power adapter
▪ Uninterrupted power supply
▪ Desktop computer
▪ User's manual
▪ "UDG software solution"
▪ Accessories kit
▪ Spare parts kit
▪ Calibration procedure
▪ Optional accessories:
- АТ5350/1 Standard dosimeter (Intrinsic error under ±3%)
- АТ1102 Comparator (Intrinsic error under ±5%)
 
 
Standards compliance:
 
GOST R 8.804-2012 (State verification schedule)
GOST 8.087-2000 (Dosimetric installations. Methods of verification)
GOST 27451-87 (Ionizing radiation measuring means)
GOST 12.2.091-2012 (IEC 61010-1:2001) (Safety requirements)
GOST R 51522.1-2011 (IEC 61326-1:2005) (Electromagnetic compatibility) 
NP-038-11 (Safety of radiation sources)
АТ110 is listed in national registry of measurement instruments of Russian Federation (Certificate No. 40425-09 in State Register of approved measuring instruments of Russian Federation)
Design and specifications are subject to change
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