Note use the map in the: http://www.largeimages.bgs.ac.uk/iip/mapsportal.html?id

Question

Note use the map in the: http://www.largeimages.bgs.ac.uk/iip/mapsportal.html?id-1003959 The uppermost limestone in this area contains traces of uranium minerals which result in high radon fluxes, with soil gas radon reaching 76 kBqm-3, a value that will result in exposures that exceed the UK Radon Action Levels. Identify and explain the areas of maximum radon risk within grid square 300570. (The grid reference refers to the SW corner of the grid square to be considered) 3. H81ING Introductory Geology S H Marsh Estimate by how many metres the base of the Asbover Grit is displaced vertically by the fault at 323600, name the type of fault and state what side is downthrown? 4.

Explanation / Answer

Utilizing the GeoDirectory dataset the quantity of houses anticipated to have levels more than 200 Bq/m3 is 91,019 or 7% of the lodging stock in 2000. To permit correlation with radiation measurements emerging from different sources, the radiation dosage because of radon introduction can be computed utilizing a presentation measurements change factor of 1 millisievert (mSv) radiation dosage per 40 Bq/m3 radon focus in an abode, expecting an inhabitance of 7000 hours for each annum. Utilizing this transformation factor, an inhabitant of a house with an indoor radon level of 200 Bq/m3 , the national Reference Level, gets a radiation measurements from radon of 5 mSv per annum. It is fascinating to research the dissemination of high radon houses, i.e. houses with indoor radon levels > 200 Bq/m3 , all through the nation in light of the 10% High Radon Area model.

It is a normal fault and right side is downthrown.

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