Development of a passive self-cleaning scrubber for containment venting applications
A novel air cleaning concept is being developed for potential use in venting reactor containment buildings. The two-stage system employs a pre-scrubber (a submerged gravel scrubber) and a fibrous scrubber to obtain high removal efficiencies for particulate contaminants. The submerged gravel scrubber is unique in that water flow is induced by the gas flow, eliminating the need for an active liquid pump. In addition, design gas velocities through the gravel bed are 10 to 20 times higher than for a conventional sand bed filter. A series of development tests have been performed on an engineering scale model with a gravel bed area of 0.07 m/sup 2/. Hydraulic tests indicate that the scrubber can be designed to operate at a superficial gas velocity of 0.50 m/s. Aerosol tests were performed with a variety of sodium fire aerosols. The aerosol mass removal efficiency for the pre-scrubber was 99.8% and the efficiency for the system exceeded 99.99%. The test results show that the aerosol removal efficiency is not a strong function of the gas velocity. Scale-up tests were made to evaluate gas distribution on a larger bed. The results demonstrated that the self-cleaning gravel bed can be scaled-up to the sizes required for full-scale containment applications.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC14-76FF02170
- OSTI ID:
- 6987031
- Report Number(s):
- HEDL-SA-2129; CONF-801038-14; TRN: 80-018656
- Resource Relation:
- Conference: 16. DOE nuclear air cleaning conference, San Diego, CA, USA, 20 Oct 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CONTAINMENT BUILDINGS
AIR CLEANING SYSTEMS
LMFBR TYPE REACTORS
AEROSOLS
COMBUSTION
EFFICIENCY
PARTICLES
REMOVAL
SCRUBBERS
SODIUM
VENTS
ALKALI METALS
BREEDER REACTORS
CHEMICAL REACTIONS
COLLOIDS
CONTAINMENT
DISPERSIONS
ELEMENTS
ENGINEERED SAFETY SYSTEMS
EPITHERMAL REACTORS
EQUIPMENT
FAST REACTORS
FBR TYPE REACTORS
LIQUID METAL COOLED REACTORS
METALS
OXIDATION
POLLUTION CONTROL EQUIPMENT
REACTORS
SOLS
THERMOCHEMICAL PROCESSES
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
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