Ventilation required or not?
Ventilation is required for the water chiller. Generally we advise our customers to place the water chiller in a separate room that has good ventilation to be able to disperse the heat coming from the X-ray tube.
What does CDRH stands for?
CDRH stands for the FDA’s Center for Devices and Radiological Health (CDRH). Performance Standards for Ionizing Radiation Emitting Products can be found at CDRH 21CFR1020.40
What are the different interlocks provided for safety of products and personnel?
The RS 2400 is shielded very well. That said, should personnel attempt to open the X-ray door during operation, the unit will immediately fault and shut off.
Are you providing dosimeters for dosimetry?
We do not provide dosimeters for dosimetry. We recommend using the Gafchromic film, generally HD 810.
What about X-ray on power failure?
If there is a complete power failure the unit would shutoff and the onboard battery would retain the processing information for that cycle. We can modify the unit to have any additional power generation protection you desire.
How do you address power failure?
The unit only generates radiation when it is producing X-rays. Therefore it is completely safe if there is a power failure. For processing purposes, if there is a complete power failure the unit would shutoff and the onboard battery would retain the processing information for that cycle. We can modify the unit to have any additional power generation protection you desire.
How do you address cooling water flow and its temperature control?
The water that cools the X-ray tube is provided by an external water chilling unit. It is temperature controlled and if it exceeds an identified temperature then the unit will fault and shut off to keep from damaging itself.
What is the typical cycle time?
The typical cycle time is based on your target dose. Assuming you have product that is a density of 0.57 g/ml, being processed in a 11 cm diameter canister, 19 cm in height, with a dose uniformity ratio (DUR) of 1.3, the dose would be somewhere around 20 Gy per minute. Using this information, if your total target dose is 200 Gy, then it would take 10 minutes to deliver your dose.
Loading and unloading of the product not clear.
Again, loading and unloading of the product is done from the top of the unit in between processing cycles. It is very easy to do and only takes a couple of minutes at most. Generally it can be done in less than one minute.
What is the speed of the rotating carousal? Can the speed be changed?
The speed of the rotating carousel can be changed to meet processing needs.
If the product loading is horizontal. How you ensure product not coming out of the canister.
The canisters have locking lids that keep product from coming out of the canister. That said, we recommend putting your product in a second internal canister to ensure your product does not fall out of the processing canisters as they are not water or air tight.
The canisters seem to move in vertical plane. Is the loading of products in the canisters horizontal
In the standard RS 2400, the canisters are loaded from the top and they are processed in a horizontal carousel.
What is the dose on the surface of the equipment during operation?
The dose on the surface is very low, radiation survey’s for the RS 2400 show the highest dose is 30 µR/hr.
Is the equipment is designed for specific canister size or can we change the canister size?
The equipment can be configured for many different sized canisters. They can range from seven 7.5 cm diameter canisters to five 17.5 cm diameter canisters. Height generally is around 16.5 cm. The larger the canister diameter, the larger the DUR and lower dose rate.
Shielding is ½ lead. Statement is not clear?
The irradiation chamber is a lead box that is ½ inch ( 1.2 cm) thick.