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Title: Helium generation in fusion reactor materials. Technical progress report, October 1976--March 1977

Abstract

The immediate objectives of this program are to measure the spectrum-integrated helium generation rates and cross sections of several materials in the available high intensity neutron sources, and to develop neutron dosimetry procedures using some of these materials. This requires further development of foil activation dosimetry techniques, since the cross section measurements require a detailed characterization of each neutron environment. The neutron facilities presently used in this program include accelerators producing d-T and d-Be reactions and high flux mixed-spectrum fission reactors. Most of the work reported here has focused on neutron spectra from the d-T reaction. A description is given of the preliminary analysis of wire rings included in the irradiation capsule for helium accumulation fluence dosimetry. The results show non-uniformities in the neutron fluence distribution characterizing this irradiation, and point out the value of helium accumulation fluence dosimetry for characterizing high energy (approximately 5 to 30 MeV) neutron fields. The helium accumulation fluence data are being used to adjust the neutron fluence map for calculation of final helium generation cross sections from the other RTNS-irradiated pure element specimens. Most of the specimens irradiated in the RTNS-I experiment have been analyzed for helium, and preliminary results are presented.

Authors:
;
Publication Date:
Research Org.:
Atomics International Div., Canoga Park, CA (USA)
OSTI Identifier:
7320719
Report Number(s):
AI-ERDA-13201
TRN: 77-014981
DOE Contract Number:  
EY-76-C-03-0701
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; GOLD 197; NEUTRON REACTIONS; NICKEL 58; NIOBIUM 93; THERMONUCLEAR REACTOR MATERIALS; CROSS SECTIONS; HELIUM; PHYSICAL RADIATION EFFECTS; PRODUCTION; BARYON REACTIONS; CRYOGENIC FLUIDS; ELEMENTS; EVEN-EVEN NUCLEI; FLUIDS; GOLD ISOTOPES; HADRON REACTIONS; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; NICKEL ISOTOPES; NIOBIUM ISOTOPES; NONMETALS; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; ODD-EVEN NUCLEI; RADIATION EFFECTS; RADIOISOTOPES; RARE GASES; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; YEARS LIVING RADIOISOTOPES; 700209* - Fusion Power Plant Technology- Component Development & Materials Testing; 360106 - Metals & Alloys- Radiation Effects

Citation Formats

Farrar, H. IV, and Kneff, D. W. Helium generation in fusion reactor materials. Technical progress report, October 1976--March 1977. United States: N. p., 1977. Web. doi:10.2172/7320719.
Farrar, H. IV, & Kneff, D. W. Helium generation in fusion reactor materials. Technical progress report, October 1976--March 1977. United States. https://doi.org/10.2172/7320719
Farrar, H. IV, and Kneff, D. W. 1977. "Helium generation in fusion reactor materials. Technical progress report, October 1976--March 1977". United States. https://doi.org/10.2172/7320719. https://www.osti.gov/servlets/purl/7320719.
@article{osti_7320719,
title = {Helium generation in fusion reactor materials. Technical progress report, October 1976--March 1977},
author = {Farrar, H. IV and Kneff, D. W.},
abstractNote = {The immediate objectives of this program are to measure the spectrum-integrated helium generation rates and cross sections of several materials in the available high intensity neutron sources, and to develop neutron dosimetry procedures using some of these materials. This requires further development of foil activation dosimetry techniques, since the cross section measurements require a detailed characterization of each neutron environment. The neutron facilities presently used in this program include accelerators producing d-T and d-Be reactions and high flux mixed-spectrum fission reactors. Most of the work reported here has focused on neutron spectra from the d-T reaction. A description is given of the preliminary analysis of wire rings included in the irradiation capsule for helium accumulation fluence dosimetry. The results show non-uniformities in the neutron fluence distribution characterizing this irradiation, and point out the value of helium accumulation fluence dosimetry for characterizing high energy (approximately 5 to 30 MeV) neutron fields. The helium accumulation fluence data are being used to adjust the neutron fluence map for calculation of final helium generation cross sections from the other RTNS-irradiated pure element specimens. Most of the specimens irradiated in the RTNS-I experiment have been analyzed for helium, and preliminary results are presented.},
doi = {10.2172/7320719},
url = {https://www.osti.gov/biblio/7320719}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {5}
}