EFFECT OF MASSIVE NEUTRON EXPOSURE ON THE DISTORTION OF REACTOR GRAPHITE

Technical Report · Tue May 28 04:00:00 EDT 1963

DOI:https://doi.org/10.2172/4669074· OSTI ID:4669074

Helm, J W; Davidson, J M

Distortion of reactor-grade graphites was studied at varying neutron exposures ranging up to 14 x 10/sup 21/ neutrons per cm/sup 2/ (nvt)/sup */ at temperatures of irradiation ranging from 425 to 800 deg C. This exposure level corresponds to approximately 100,000 megawatt days per adjacent ton of fuel (Mwd/ At) in a graphite-moderated reactor. A conventionalcoke graphite, CSF, and two needle-coke graphites, NC-7 and NC-8, were studied. At all temperatures of irradiation the contraction rate of the samples cut parallel to the extrusion axis increased with increasing neutron exposure. For parallel samples the needle- coke graphites and the CSF graphite contracted approximately the same amount. In the transverse direction the rate of cortraction at the higher irradiation temperntures appeared to be decreasing. Volume contractions derived from the linear contractions are discussed. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• Sponsoring Organization: USDOE
• DOE Contract Number: AT(45-1)-1350
• NSA Number: NSA-17-032667
• OSTI ID: 4669074
• Report Number(s): HW-SA-2926; CONF-73-6
• Country of Publication: United States
• Language: English

Related Subjects

CONFERENCE
DEFORMATION
GRAPHITE
GRAPHITE CSF
GRAPHITE MODERATOR
HIGH TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
NEUTRON FLUX
RADIATION EFFECTS
REACTORS
VARIATIONS
VOLUME