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Extra resources for Decontamination, Decommissioning of Nuclear Facilities (IAEA TECDOC-511)

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Cold leg 4 samples with grinder 3 samples with oxyacetylene 3 samples with plasma torch. Conclusion and results The different sequences were as follows : - spray of basic gel, rinsing, spray of acid gel, rinsing, or : two sprays of acid gel followed by rinsing. An 40 amount of 150 to 200 g/m2 of gel were sprayed on the surface and let minutes to operate. The amount of rinsing water was between 20 and 30 l/m2. - Cold leg : The contamination of the samples was ranging between 25 and 40 Bq/cm2. 3 Bq/cm2.

L. G. Delaney, AECL, published In the IAEA Bulletin, Winter 1985. DECONTAMINATION FOR DECOMMISSIONING OF NUCLEAR POWER REACTORS E. HLADKY, J. BLAZEK, D. MAJERSKY, V. REHACEK Nuclear Power Plants Research Institute, Jaslovske Bohunice, Czechoslovakia Abstract As part of a programme carried out in Czechoslovakia in connection w i t h the decommissioning of the Nuclear Power Plant A-l, a study has been conducted on decontamination of m a t e r i a l s and t h e i r possible reuse. The o b j e c t i v e s of t h i s study were to select suitable decontamination agents, assess decontamination e f f i c i e n c y by use of u l t r a s o n i c and electrochemical techniques, and develop a computer code applicable for reuse of m a t e r i a l s .

The decontamination head returns after one turning to avoid any damage to the vertical rails. 4 turn/min during continuous moving. The cathode can also be moved step by step to reduce the damaging of the felt. The third remotely controlled electrochemical decontamination equipment was constructed to treat the inner surface of the main gate valve case. /Fig. / The decontamination of the gate v a l v e case can be conducted only after removing the cut - off slide - valve. First the two pipe-ends must be plugged to prevent from the electrolyte or other impurities getting in .

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