|
|
|
 |
Gamma Chamber 5000 is a compact self shielded cobalt-60 gamma irradiator
providing an irradiation volume of approximately 5000cc. The material
for irradiation is placed in an irradiation chamber located in the vertical
drawer inside the lead flask. This drawer can be moved up and down with
the help of a system of motorised drive which enables precise positioning
of the irradiation chamber at the centre of the radiation field.
Radiation field is provided by
a set of stationary cobalt-60 sources placed in a cylindrical cage.
The sources are doubly encapsulated in corrosion resistant stainless
steel pencils and are tested in accordance with international standards.
Two access holes of 8 mm diameter are provided in the vertical drawer
for introduction of service sleeves for gases, thermocouple, etc. A
mechanism for rotating/stirring samples during irradiation is also incorporated. The lead shield provided
around the source is adequate to keep the external radiation field well
within permisible limits. The Gamma Chamber 5000 unit can be installed
in a room measuring 4 metres X 4 metres X 4 metres.
|
Gamma Chamber 5000
|
Biological Effects |
Chemical Effects
|
Dose - Rate Effects |
|
Features
: |
- Safe
and self-shielded: The shielding provided is adequate to limit
the radiation field on the external surface of the unit, well within
the permissible levels. No additional shielding is required for its
installation and use.
- Automatic
control of irradiation time: Built-in timer provides accurate
control of irradiation time from 6 seconds onwards. The unit can also
be operated manually. Solid state programmable controls have been
provided. In the event of power failure battery backup displays the
programmes.
- Manual
control of irradiation temperature: It is possible to irradiate
samples at low or high temperature by circulating liquid nitrogen
or hot air. These can be introduced through the service sleeves provided
in the vertical drawer. The irradiation temperature is sensed by a
thermocouple and displayed on the panel.
- Remote
operation: An additional table top control panel is provided for
remote operation in addition to the normal one provided on the unit.
- Dose
uniformity: Stationary source pencils, symmetrically placed in
a cylindrical cage ensure good uniformity of radiation field in the
sample chamber. In addition a mechanism is also provided for rotating/stirring
samples during irradiation.
- Easy
loading and unloading of samples: Sample chamber extends to a
convenient height for easy loading and unloading of samples.
- Safety
assurance: The design of Gamm Chamber conforms to American National
Standards, ANSI-N433.1-1977 for safe design and use of self-contained
dry source storage gamma irradiators(Category I). It also meets the
requirements of type B(U) package for safety in transport of radioactive
materials as per AERB code No.SC/TR-1, 1986 of Atomic Energy Regulatory
Board of INDIA.
|
 |
|
Applications
: |
|
Accessories
& Other Supplies : |
Gamma Chamber
is a versatile equipment for research studies in many fields such as:
- Radiobiology
- Preservation
of tissue grafts
- Mutation
breeding
- Food
preservation
- Sterile
male insect technique
- Biological
and genetic effects of radiations
- Radiation
chemistry
- Radiation
effects on materials
- Radiation
sterilization
- Modification
of properties of materials
Gamma Chamber can also be used in many other
research applications which require irradiation of
materials with ionizing radiations to varying doses. |
|
|
- Attenuators to bring down the radiation dose in the sample
chamber by 25% or 50% - are available on request.
- Ceric-cerous dosimeters are available in sets of 100 ampules
of 2 ml. The Kilo Gray Gamma Dosimeter system to read out the
dose delivered, is also available.
- Biological indicators inoculated with 106 - 107
spores of Bacillus Pumilus ATCC 14884, on paper disc
are available in multiples of 100 numbers (50 pairs). These
are useful when sterility is to be construed without subjecting
the sample to destructive sterility test.
|
|
After-Sales Service: |
BRIT
can undertake refurbishing of old units and provide replenishment of
cobalt-60 source in the unit.
|
|
Specifications
of Gamma Chamber 5000 :
|
|
Maximum Co-60 source capacity |
518 TBq (14000 Ci) |
|
Dose rate at maximum capacity |
~ 9 kGy/hr (0.9 Mega Rad/hr)
at the center of sample chamber |
|
Dose rate uniformity |
+25% or better radially;
-25% or better axially |
|
Irradiation volume |
5000cc approx. |
|
Size of sample chamber |
17.2cm (dia) X 20.5cm (ht) |
|
Shielding material |
Lead & stainless steel |
|
Weight of the unit |
5600 kg. approx. |
|
Size of unit |
125cm (l) X 106.5cm (w) X 150cm (ht) |
|
Timer range |
6 seconds onwards |
|
|
Installation
requirements :
|
|
Power
requirement
|
220/230V,
50Hz, 10Amps, single phase |
|
|
4M X 4M X
4M |
|
|
1.2M clear
width X 2M height |
|
|
35cm dia X
70cm depth in the floor |
|
|
d)
floor loading capacity |
|
10MT per sq.M |
| |
