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ASHF Series of Source Holders

Supplier: Nuclear Australia

The ASHF2 Series of source holders exceed the requirements of the “Code of Practice for the Safe Use of Radiation Gauges (2007).

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Compromised Source Holders

The ASHF2 Series of source holders exceed the requirements of the “Code of Practice for the Safe Use of Radiation Gauges (2007).

Features of the ASHF Source Holder

• Will survive serial destructive forces e.g. corrosion + fire + fall

• Uses heavy metals for primary attenuation

• Fixed source - Rotary Shutter

• Does not contain toxic lead

• Light Weight - 35Kg

• High Capacity - 1200mCi with less than 500µSv from the surface (Type E)

• Finishes - Yellow or Orange Powder Coated Epoxy

- Natural Stainless Steel

- Natural Bronze

• Special finishes to customer requirements

• High force indent to prevent inadvertent operation

• Lockable in ‘Off’ position only

• Unambiguous ‘On’ and ‘Off’ indication

• Serviceable (by qualified Radiation Technician)

• Fully sealed radiation window

• 10° circular radiation pattern

• Remote actuation available

• Life test was stopped at 1,060,000 operations

Why do we need to change over older source holders?

Source Holders can become compromised in as little as 1 year. While this may not cause problems with the capsule it renders useless the protection afforded by the Code of Practice, e.g. if a rust compromised lead filled Source Holder is heated to 300°C the attenuating lead will melt and escape through holes caused by crevice or pin corrosion. The Source Holder needs to be replaced long before the elements can compromise the Source.

The requirements of some Health Departments and EPAs is to test the source capsule for leakage at 10 or 12 years and authorise its continued use for an additional 2 or 3 years limiting life to the Recommended Working Life stated by the capsule Manufacturer. Source Holders that have been in service for 10 years have not been designed to be serviced and are therefore often not in good condition and may now not meet the current Code of Practice.

If the Source Holder looks in poor condition it is probably compromised.

Nuclear Australia can solve your problem in several ways.

Have th• e source removed from the Holder, tested and stored while the Holder is refurbished, the capsule reinstalled, and shipped back to site.
With this method the gauge could be out of service for up to 4 weeks.

Have the source removed from the Holder, tested and installed in an ASHF Holder and shipped back to site.
This method could have the gauge out of service for up to 2 weeks.

Nuclear Australia supplies a new ASHF Holder complete with new capsule, send it to site and return the old Holder for capsule recovery and disposal.
Typical out of service time is only 2 hours


Notes: The ASHF has a bolt pattern of 150 x 150.

Adaptors can be made to suit other bolt patterns.

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