Code of practice for the protection of persons against ionizing radiations arising from medical and dental use.

  • Great Britain. Radioactive Substances Advisory Committee
Date:
1964
Catalogue details

Licence: Public Domain Mark

Credit: Code of practice for the protection of persons against ionizing radiations arising from medical and dental use. Source: Wellcome Collection.

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    4] 5.2.4. The discharge of liquid radioactive waste should be limited to as small a number of points as possible and should be confined to the minimum section of the drainage system. Only approved sinks and drains should be used and these should be suitably marked. Drain pipes should be monitored from time to time. 5.2.5. Attention is drawn to the fact that floors may have to support large weights of shielding materials. Floors should have smooth, continuous and non-absorbent surfaces, and should be made of materials which can easily be cleaned and should, preferably, possess a surface which is easily removable. Floors should be cleaned by wet mopping or by the use of moist compound. Dry sweeping should be avoided. 5.2.6. Wails and ceilings should be finished with a non- porous washable surface, such as a good hard-gloss paint. Suitable materials for bench tops are waxed wood, laminated plastic sheets or glass. The working surface should always be protected by disposable covers of paper, bituminised paper, vinyl cloth, plastic-coated paper, or plastic sheets. To minimise the risks from spills, drip trays or double containers should always be used. 5.2.7. When the shielding of the worker from radiations is effected by vertical lead screens mounted on top of the bench between the worker and the source, adequate protection in other directions should be ensured. For example, y - radiation may penetrate the bench top and reach the lower part of the worker’s body or, if there are rooms below that in which the bench is installed, persons who may be working in such rooms. 5.2.8. Adequate fume hood space should be provided. Several small hoods are usually more convenient than one large one. They can be constructed of wood and glass, provided that the former is protected by hard-gloss paint. The base can be of slate, or linoleum, or laminated sheet, the choice probably depending upon the type of work to be undertaken. The junctions between the base Materials Fume hoods