HTGR Knowledge Base
Conference Article: Iodine sorption and desorption from low-alloy steel and graphite
Wichner, R.P.; Osborne, M.F.; Lorenz, R.A.; Briggs, R.B. (Oak Ridge National Lab., TN (USA))Abstract
Tests have been performed at Oak Ridge National Laboratory on the sorptive behaviour of iodine on two prominent HTGR primary circuit materials - type H-451 graphite, which is the selected core graphite, and a low-alloy steel (T-22), which is employed in the lower temperature regions of the primary system. The determination of equilibrium sorptive capacities at very low iodine partial pressures is emphasized in this work. Toward this goal, our test procedures allow on-line determination of the sorptive capacity down to iodine partial pressures of approximately 10-11 bar in helium at a total pressure of 1 bar. The apparatus employed is of the helium flow-through type. Detectors monitor the degree of sorption on specimens and traps, which, together with the helium flow rate and source vapor pressure, yields a continuous determination of iodine mass transport.
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key words: adsorption; chromium steels; deposition; desorption; engineering; experimental data; graphite; helium; htgr type reactors; iodine; ornl; primary coolant circuits; radionuclide migration; reactor simulators; testing; alloys; analog systems; carbon additions; carbon; chromium alloys; cooling systems; data; functional models; gas cooled reactors; graphite moderated reactors; halogens; iron alloys; iron base alloys; national organizations; numerical data; rare gases; reactor components; reactor cooling systems; reactors; simulators; steels; transition element alloys
- Reference:
- Specialists meeting on coolant chemistry, plate-out and decontamination in gas-cooled reactors Juelich, Federal Republic of Germany 2-4 December 1980
- International Atomic Energy Agency, Vienna (Austria)
- IWGGCR--2, pp:55-64
- International Atomic Energy Agency, Vienna (Austria)