Bleiburg (radiation protection)
A lead castle is a construction composed of movable elements with a high absorption capacity - for example, centimeter-thick lead - for flexible shielding from radioactive sources. Advantages are the adaptability to small work spaces or changing shielding requirements.
The variant of the Bleiburg, maximized in terms of tightness and shielding, for high activities and standardized work processes is the hot cell .
Nuclear medicine
In nuclear medicine , a lead castle is usually part of the shielding in the hot laboratory . The radionuclides used must be prepared, portioned and drawn up into syringes before use on the patient. To minimize the radiation exposure of the staff , this is done behind a lead castle. The operating personnel look through a several centimeter thick window made of lead glass onto the work area open at the top. Only the operator's arms and hands are not protected from direct radiation.
Lead building blocks
Lead castles are made up of movable elements. Rafter-shaped overlaps between building blocks lying on top of one another and next to one another minimize gaps between the building blocks, which would otherwise lead to inadequate shielding in the area of the gap. For the bottom and top series, lead blocks are provided that have no notches on the bottom or top.
In Germany, DIN 25407 regulates how these building blocks (and lead castles and hot cells as a whole) are to be designed.
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- Google Books: Hans Joachim Hermann: Nuclear Medicine. 5th edition, Urban & Fischer
- DIN 25407-1, Shielding walls against ionizing radiation - Part 1: Building blocks (June 2011 edition)
- DIN 25407-2: Shielding walls against ionizing radiation - Part 2: Special components for shielding walls made of lead (July 2011 edition)
- DIN 25407, Supplement 1: Shielding walls against ionizing radiation - Supplement 1: Instructions for the construction of walls made of shielding blocks (June 2011 edition)