4-6 February 2019
Centara Grand at Central Ladprao
Asia/Bangkok timezone
Deadline for full paper revision: 21 May 2019.

Evaluation of Radiation Safety for Ionizing Chamber Smoke Detectors Containing Am-241

5 Feb 2019, 14:40
1h 10m
Centara Grand at Central Ladprao

Centara Grand at Central Ladprao

Chatuchak, Bangkok 10900, Thailand
Poster Safety Poster 2

Speaker

Ms Doendara Malain (Office of Atoms for Peace)

Description

The safety assessment was carried out for ionization chamber smoke detectors (ICSDs) containing 241Am under normal use and accident scenarios. The internal and external dose were estimated using dose coefficients and associated calculation. In normal use of the ICSDs with the activity in a range of 0.002–1 MBq per ICSD, the external dose was evaluated by to an individual for installation, use and maintenance were found to lie in the range of (0.01-4.17)x10$^{-3}$ (0.017-6.76)x10$^{-1}$ and (0.006-2.5)x10$^{-2}$ µSv/y respectively. The activity of 241Am for domestic smoke detectors contain approximately 40 kBq per ICSD. The corresponding committed effective doses to a firefighter during a fire and for cleanup operation after a fire via inhalation were found to be 6.1x10$^{-5}$ and 0.024 µSv/y respectively. The committed effective dose equivalent to an infant due to dismantling of the ICSDs via ingestion would be 148 µSv/y. The possible dose arising from normal use, incidents and misuse of ICSDs are less than 10 µSv/y and 1 mSv/y respectively which do not exceed the dose criteria for exemption from regulatory control. It could be concluded that the individual radiological risk resulting from the normal use, incidents and misuse of the ICSDs are estimated to be very low and lower than 1 mSv which is the annual dose limit to a member of the public for the safe use. However, the design, construction and performance for the ICSDs should comply with the relevant requirements of ISO standard.

Primary author

Ms Doendara Malain (Office of Atoms for Peace)

Co-author

Ms Pennapa Kanchana (Office of Atoms for Peace)

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Paper