Evaluation of graphite/steam interactions for ITER (International Thermonuclear Experimental Reactor)
In this report we present the results of an experimental/analytical study designed to determine the quantity of hydrogen generated during a coolant inleakage accident in ITER. This hydrogen could represent a potential explosive hazard, provided the proper conditions exist, causing machine damage and release of radioactive material. We have measured graphite/steam reaction rates for several graphites and carbon-based composites at temperatures between 1000 C and 1700 C. The effects of steam flow rate, and partial pressure were also examined. The measured reaction rates correlated well with two Arrhenius type relationships. We have used the relationships for GraphNOL N3M in a thermal model to determine that for ITER the quantity of hydrogen produced would range between 5 and 35 kg, depending upon how the graphite tiles are attached to the first wall. While 5 kg is not a significant concern, 35 kg presents an explosive hazard. 20 refs., 14 figs., 1 tab.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (United States)
- Sponsoring Organization:
- DOE/NE
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 6310658
- Report Number(s):
- EGG-FSP-9154; ON: DE91006185; TRN: 91-002578
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
GRAPHITE
CHEMICAL REACTION KINETICS
HYDROGEN
ITER TOKAMAK
ACCIDENTS
STEAM
CHEMICAL REACTIONS
EXPLOSIONS
FLOW RATE
OXIDATION
PRESSURE EFFECTS
SAFETY
THERMAL ANALYSIS
CARBON
CLOSED PLASMA DEVICES
ELEMENTAL MINERALS
ELEMENTS
KINETICS
MINERALS
NONMETALS
REACTION KINETICS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
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