Phenomenology and modeling of particulate corrosion product behavior in Hanford N Reactor primary coolant
The levels and composition of filterable corrosion products in the Hanford N Reactor Primary Loop are measurable by filtration. The suspended crud level has ranged from 0.0005 ppM to 6.482 ppM with a median 0.050 ppM. The composition approximates magnetite. The particle size distribution has been found in 31 cases to be uniformly a log normal distribution with a count median ranging from 1.10 to 2.31 microns with a median of 1.81 microns, and the geometric standard deviation ranging from 1.60 to 2.34 with a median of 1.84. An auto-correcting inline turbidimeter was found to respond to linearly to suspended crud levels over a range 0.05 to at least 6.5 ppM by direct comparison with filter sample weights. Cause of crud bursts in the primary loop were found to be power decreases. The crud transients associated with a reactor power drop, several reactor shutdowns, and several reactor startups could be modeled consistently with each other using a simple stirred-tank, first order exchange model of particulate between makeup, coolant, letdown, and loosely adherent crud on pipe walls. Over 3/10 of the average steady running particulate crud level could be accounted for by magnetically filterable particulate in the makeup feed. A simulation model of particulate transport has been coded in FORTRAN.
- Research Organization:
- UNC Nuclear Industries, Inc., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01857
- OSTI ID:
- 6861572
- Report Number(s):
- UNI-TR-9; ON: DE84011833
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220700* -- Nuclear Reactor Technology-- Plutonium & Isotope Production Reactors
COOLING SYSTEMS
CORROSION PRODUCTS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
GRAPHITE MODERATED REACTORS
LWGR TYPE REACTORS
N-REACTOR
PARTICLE SIZE
PLUTONIUM PRODUCTION REACTORS
POWER REACTORS
PRIMARY COOLANT CIRCUITS
PRODUCTION REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SIZE
TRANSIENTS
WATER COOLED REACTORS
220700* -- Nuclear Reactor Technology-- Plutonium & Isotope Production Reactors
COOLING SYSTEMS
CORROSION PRODUCTS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
GRAPHITE MODERATED REACTORS
LWGR TYPE REACTORS
N-REACTOR
PARTICLE SIZE
PLUTONIUM PRODUCTION REACTORS
POWER REACTORS
PRIMARY COOLANT CIRCUITS
PRODUCTION REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SIZE
TRANSIENTS
WATER COOLED REACTORS