PULLES HOWARD & DE LANGE INC.

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RADIATION STUDIES

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Council for Nuclear Safety (CNS) Model Training

PHD, in collaboration with its international associates undertook to train the Council for Nuclear Safety on the use of various radiological hazard assessment models, in Canada (SENES) and Germany (Brenk Systemplanung) to aid the Licensing process in South Africa.

Kynoch Radiological Assessment of Potchefstroom, Chloorkop and Phalaborwa sites.

A detailed radiological hazard assessment of the risks to the public is being undertaken in terms of the CNS Licensing Guide LG1032. This covers all aspects of the process including, site characterisation, identification and description of critical groups, source term definition, pathways modelling for air, surface and ground water, dose assessment, identification of the need for remediation strategies and the development of detailed monitoring programmes. Ongoing discussion with the CNS is also covered.

Iscor Heavy Minerals Radiation Assessment

A detailed radiological hazard assessment of the risks to the public is being undertaken in terms of the CNS Licensing Guide LG1032. This covers all aspects of the process including, site characterisation, identification and description of critical groups, source term definition, pathways modelling for air, surface and ground water, dose assessment, identification of the need for remediation strategies and the development of detailed monitoring programmes. Detailed background studies have been undertaken to define pre-mining radiation levels. Detailed assessment of engineering designs is being undertaken to identify engineering changes which could be implemented to reduce risk top workers. Assessment of dose to workers in terms of LG1029 is also being undertaken, together with input into the process of development of Codes of Practice for radiation protection.

A preliminary survey of radioactivity in South Africa's water resources

A country-wide survey of South Africa's water resources was planned and undertaken in co-operation with BKS Incorporated, the Atomic Energy Corporation and the Department of Water Affairs' Institute for Water Quality Studies. A hazard rating system was developed, based on the use of water for potable purposes. It was found that potential hazards exist in a number of areas in the country and that further, more detailed monitoring and impact assessment studies are required.

Human health risk assessment associated with contaminated gypsum

A screening level quantitative risk assessment has been undertaken for human receptors involved in the processing, handling and application of secondary products produced from radioactively contaminated gypsum. This report was then submitted for detailed critical review by the relevant regulatory authorities.