IAEA Regional Training Course on “Organization and Competence of the Regulatory Body” in Beirut, Lebanon from 13 to 17 February 2017, [more info]
Radiation Protection
Safety And Security Of Radioactive Sources
Environmental Radiation Survey Program Public Dose Assessment
Public Dose Assessment
Environmental Radiation Survey Program
The program aims to establish radioactivity baseline levels for the Lebanese environment. Regular analysis of natural and artificial radionuclides in environmental samples is carried out.
The foodstuff monitoring includes the routine analysis of the main market basket of the Lebanese diet that are collected randomly from local markets. In the same way, radio analysis of imported and exported consumable products, as service provided by LAEC, is daily performed for certification.

The annual effective dose from gamma emitters in total Lebanese diet presenting the market basket is calculated. The study showed that the total dose is within the permissible levels.

Air Monitoring
Daily air monitoring is carried out at fixed locations distributed at different Lebanese provinces.

An Early Warning Radiation Network System will be established under the framework of a national TC Project with the International Atomic Energy Agency, to perform continuous air monitoring and to detect any abnormal activity.

Seven stations will be installed. The central one will be at LAEC building in Beirut while the six others will be distributed at relevant locations (South, North, Bekaa, etc...)
Drinking and Surface Water
The program covers the radiometric screening of drinking water through the determination of gross alpha/gross beta by Liquid Scintillation Counter, Stable isotopes and isotopic ratios of radionuclides are determined by Induced Coupled Plasma Mass Spectrometry. Determination of Uranium isotopes and Polonium-210 in commercial mineral water as well as gamma and alpha emitters in surface fresh water are routinely performed.
Marine Environment
Seawater, beach sand, sediment and biota samples are routinely collected at different locations along the Lebanese cost in order to determine alpha and gamma emitters. Highest values are generally found near industrialized areas but still within the acceptable values
Radioactive Map of the Lebanese Soil
We determine the activity concentration of naturally occurring and artificial radionuclides in soil samples collected from uncultivated areas along the Lebanese provinces. The data obtained are used to plot the activity concentration per meter square for U-238, Th-232, Ra-226, K-40 and Cs-137 on the Lebanese map.
Public Dose Assessment
External Dose Assessment
Radiation risk assessment to which public are exposed due to the terrestrial radioactivity is one of our aims. Calculation of total absorbed dose and annual effective dose from natural and artificial radionuclides present in soils along the Lebanese territory is an important issue to achieve this goal. The obtained average values for natural and artificial radionuclides are lower than average worldwide values reported by UNSCEAR.
Internal Dose via Inhalation and Ingestion
As Radon gas is the main source for public exposure by inhalation, a national program is established to measure indoor and outdoor levels of radon and its progeny using passive and active methods (CR-39, gamma spectroscopy, and Alpha Guard Kit)

The annual effective dose from gamma emitters in total Lebanese diet presenting the market basket is calculated. The study showed that the total dose is within the permissible levels.

Identification of Orphan Sources
Since 2005, we received orphan items (sources and contaminated materials) found during field inspection of steel and scrap. The identification of the radionuclide and its characteristics (activity, surface dose, etc...) is also determined in the departments?laboratories.
Dating and Ground Water Assessment
Under the framework of a national TC project with the IAEA, a benzene synthesis line for radiocarbon determination wasinstalled in 2010. Dating of materials up to 50000-60000 years is the main advantage of this technique. To establish a national radiocarbon baseline level, a study of C-14 in tree rings is started recently.

Dating will be extended to cover archeological and geophysical studies. In addition to C-14 laboratory, an electrolytic enrichment system for H-3 determination in water was installed. The measurement of both C-14 and H-3 is useful to assess the status of ground water, degree of discharge, mixing and pollution.

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