Use of drawings during decontamination and decommissioning, USA. Annex II-12

Some issues to consider related to use of drawings are: (a) For decommissioning, locate or obtain the best set of drawings available for a building or facility. Ensure that these drawings are maintained in a formal drawing control programme. (b) Consider using drawings that identify buildings by orientation; for example, by column and elevation or floor, as opposed to area or room. Whatever is selected, be consistent in all documents so as to avoid confusion. (c) Consider labelling sections of the building and/or equipment with paint or placards. The individuals performing the decommissioning are generally not the previous operators and are therefore not qualified on the equipment in the building and are not as familiar with the building as previous operators. Labelling may avoid confusion. (d) Ensure that all documents generated for that building or facility use the same set of drawings as their basis.(e) As equipment is removed, consider using a 'red line' process rather than a formal as-built or drawings revision process. (f) As drawings are no longer applicable owing to removable equipment, delete the drawings and retain them as records that will show that all equipment has been removed. (g) As the building is being removed, use the same red line process, particularly for large buildings, until the building has been demolished. Then delete appropriate drawings and retain them as records to show what has been removed. (h) Continue this process until there are no more active drawings for that building or facility. As a generic lesson learned, develop project documentation on the basis of the best available set of drawings for a building or facility so as to maintain consistency and avoid confusion