DECONTAMINATION SOLUTIONS


11th International Conference on CANDU® Maintenance and Nuclear Components - 2017 Oct. 01-04

Presented at:
11th International Conference on CANDU® Maintenance and Nuclear Components
2017 Oct. 01-04
Location:
Toronto, ON Canada
Session Title:
Strategies to Mitigate Component Degradation

Authors:
H. Damies (AREVA GmbH)
S. Nothvogel (AREVA GmbH)
S. Wegener (AREVA GmbH)
  

Abstract

Efficient decontamination of NPP components is essential for reduction of dose rates below defined limits and removal of dust and corrosion particles (contamination) as well as surface coating.
Different equipment / tools are applied to prepare recurrent testing of components (like inside tank inspections), regular maintenance works (e.g. on pumps and valves) but also in terms of plant retrofit or modernization programs to allow “free release” of the dismantled parts for further handling and disposal or recycling.
AREVA’s product portfolio provides 2 clean and time saving stationary decontamination solutions:
Decontamination Chambers: ? Different sizes, from glove box size for smaller parts to large accessible chambers equipped with a changing cabin ? For decontamination of components or parts ?3t or diameter ?1,5m or length ?3m (special chamber sizes are possible) ? Possibility of semi-automatic decontamination in case of high dose rate ? Decontamination only with demineralised water under high pressure > No secondary waste, nearly no surface removal ? Pressure level of High Pressure Pumps is flexible (e.g. 160 to 400 barg) and will be chosen based on the decontamination task ? Possibility to work with additional chemicals
Cleaning Bathes: ? Suitable for small and sensitive parts ? Equipped with ultrasonic transducers, if needed Frequency and power level of ultrasonic transducers is flexible and will be chosen based on the decontamination task ? Possibility of semi-automatic decontamination in case of high dose rate ? Decontamination only with demineralised water (No secondary waste, nearly no surface removal) ? Possibility for addition of chemicals and heating ? Size of Cleaning Bathes will be adapted to the size and weight of the components to be decontaminated
With our experience from implementation of different decontamination workshops worldwide we provide valuable and tailored customer solutions.




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