Radiological Analysis Approach

Several measures are available to reduce indoor radon levels. Their application would depend on a cost-benefit analysis approach in accordance with the recommendahons of the Intemahonal Commission on Radiological Protechon (ICRP). The measures available include ... 

The radiological analysis that has been undertaken to date has demonstrated compliance with US regulatory requirements. Both the requirements and the prescribed analysis methodology differ between the US and UK regulatory regimes. For this reason, a UK-specific consequence analysis, using a UK approach, will be carried out during Step 4 of the GDA. However, based on the... 

Many SCCs of the head and neck are treated surgically with primary resection and possibly neck dissection. Some patients can present with metastatic SCC in the neck, but despite careful clinical and radiologic workup, a primary tumor cannot be found. In these cases, TIPV analysis, particularly using an in situ hybridization approach, can be useful. In several series, HPV-associated tumors are largely restricted to the tonsil and tongue base area. When HPV is positive in the neck nodes from a patient with an unknown primary tumor, the clinical management can be directed toward these high-risk areas. 

The analysis would typically involve a multitiered approach using different codes, including detailed system and containment analysis codes, more simplified risk assessment and separate effects codes, and source term and radiological impact studies. Use of a full selection of codes will ensure that all the expected phenomena... 

The analysis should use a logical approach which models how the event sequences progress from core damage to a radiological release. This is usually done by event tree analysis which models the accident sequence in a number of time frames and uses a set of nodal questions to model the sequence of events which occur. The construction of the event trees needs to be supported by thermal-hydraulic calculations and modelling of fission product release and transport inside the containment. 

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