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Distribution
of Radiation around Labyrinth Type Exposure Room
Mohamad
Pauzi Ismail, Mohd Yusnisyam Yusuf, Shaharudin Sayuti, Noor Azreen Masenwat,
Suhairy Sani, Siti Madiha Muhammad Amir and Azhar Azmi
NDT group, Industrial Technology Division,
Malaysia Nuclear Agency, Bangi, 43000 Kajang.
Abstract
The design of X-ray
or gamma ray radiographic exposure room requires some calculations on shielding
to provide safe operation of the facility and minimum exposure to radiation
workers. Careful design can lead to economical installations with minimal
barriers. The design depends on such factors as: maximum energy, maximum
intensity, permitted full-body dosage, workload, use factor, occupancy factor,
maximum dose output and shielding materials. Choice of shielding materials
depends on convenience and cost. The
radiographic exposure room is usually made of normal concrete with density of
about 2.3 – 2.4 g/cc. Normal concrete is
often used for construction of exposure room because of cheap and ease of
construction.
Labyrinth or maze
type of design is the most popular especially for high energy radiation since
it can reduce the radiation to a level that make the door design economic and
practicable.
This paper explained
and discussed the distribution of radiation dose around the labyrinth type of
exposure room.+++++++++++
Secara umumnya persidangan ini telah berjaya mengumpulkan ahli-ahli NDT seluruh negara. Bagaimanapun penyertaan agak kurang berbanding tahun sebelumnya. Begitu juga dengan kertas kerja. Tidak banyak kertas kerja ilmiah.
Akan tetapi penyertaan untuk pameran cukup memuaskan. Banyak juga peralatan NDT dipamerkan. Barangan buatan China nampaknya semakin rancak dengan harga yang cukup berdaya saing.
Penggunaan teknik laser untuk melukis semula objek (reverse engineering)
