Trapping of deuterium at damage in graphite

Conference · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.1016/0022-3115(90)90178-P· OSTI ID:6925069

Wampler, W R; Doyle, B L ^[1]; Causey, R A; Wilson, K ^[2]

---

1. Sandia National Labs., Albuquerque, NM (USA)
2. Sandia Labs., Livermore, CA (USA)

Enhanced retention of deuterium (D) and tritium (T) in graphite due to neutron damage could result in large T inventories in future DT fueled fusion devices such as CIT and ITER. This paper describes experiments done to characterize the effect of lattice damage on retention of D in graphite. Lattice damage was produced in several types of graphite by irradiation with 6 MeV C+ ions or with neutrons. The damaged graphite was then heated to 1200{degree}C and exposed to D{sub 2} gas. The concentration of D retained in the graphite was measured by nuclear reaction analysis and compared to the level of damage. In POCO, N3M and H451 graphites, D retention increased with damage at low damage levels but saturated above 0.04 dpa at a D concentration of about 650 atomic ppM. D retention in damaged highly oriented pyrolytic graphite was an order of magnitude smaller than in the other graphites indicating that crystalline microstructure is an important factor. These results indicate that neutron damage in CIT and ITER may cause retention of large inventories of tritium in graphite components. 5 refs., 4 figs., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6925069
• Report Number(s): SAND-89-3001C; CONF-900505--1; ON: DE90011234
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIUM
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROGEN ISOTOPES
IRRADIATION
ISOTOPES
LIGHT NUCLEI
MATERIALS
MICROSTRUCTURE
MINERALS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIOISOTOPES
STABLE ISOTOPES
THERMONUCLEAR REACTOR MATERIALS
TRAPPING
TRITIUM
YEARS LIVING RADIOISOTOPES