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At least 523 records · Page 29
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Pu2HgSb by Materials Project

Pu2HgSb is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to four equivalent Hg and four equivalent Sb atoms. All Pu–Hg bond lengths are 3.27 Å. All Pu–Sb bond lengths are 3.27 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent Pu atoms. Sb is bonded in a body-centered cubic geometry to eight equivalent Pu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3Pu by Materials Project

Li3Pu is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded in a body-centered cubic geometry to four equivalent Li and four equivalent Pu atoms. All Li–Li bond lengths are 3.11 Å. All Li–Pu bond lengths are 3.11 Å. In the second Li site, Li is bonded in a 8-coordinate geometry to eight equivalent Li and six equivalent Pu atoms. All Li–Pu bond lengths are 3.59 Å. Pu is bonded in a distorted body-centered cubic geometry to fourteen Li atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Pu by Materials Project

Na3Pu is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a distorted body-centered cubic geometry to four equivalent Na and four equivalent Pu atoms. All Na–Na bond lengths are 3.63 Å. All Na–Pu bond lengths are 3.63 Å. In the second Na site, Na is bonded in a 8-coordinate geometry to eight equivalent Na and six equivalent Pu atoms. All Na–Pu bond lengths are 4.19 Å. Pu is bonded in a body-centered cubic geometry to fourteen Na atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PuMg3 by Materials Project

Mg3Pu is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a body-centered cubic geometry to four equivalent Mg and four equivalent Pu atoms. All Mg–Mg bond lengths are 3.12 Å. All Mg–Pu bond lengths are 3.12 Å. In the second Mg site, Mg is bonded in a distorted body-centered cubic geometry to eight equivalent Mg and six equivalent Pu atoms. All Mg–Pu bond lengths are 3.60 Å. Pu is bonded in a distorted body-centered cubic geometry to fourteen Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PuInHg2 by Materials Project

PuHg2In is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to eight equivalent Hg and six equivalent In atoms. All Pu–Hg bond lengths are 3.19 Å. All Pu–In bond lengths are 3.69 Å. Hg is bonded in a body-centered cubic geometry to four equivalent Pu and four equivalent In atoms. All Hg–In bond lengths are 3.19 Å. In is bonded in a distorted body-centered cubic geometry to six equivalent Pu and eight equivalent Hg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CePuCo4 by Materials Project

PuCeCo4 is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Pu is bonded in a 12-coordinate geometry to four equivalent Ce and twelve equivalent Co atoms. All Pu–Ce bond lengths are 3.01 Å. All Pu–Co bond lengths are 2.88 Å. Ce is bonded in a 12-coordinate geometry to four equivalent Pu and twelve equivalent Co atoms. All Ce–Co bond lengths are 2.88 Å. Co is bonded to three equivalent Pu, three equivalent Ce, and six equivalent Co atoms to form a mixture of edge, corner, and face-sharing CoCe3Pu3Co6 cuboctahedra. There are three shorter (2.42 Å) and three longer (2.49 Å) Co–Co bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2Br2O by Materials Project

Pu2OBr2 is Cyanogen Chloride-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is zero-dimensional and consists of one Pu2OBr2 cluster. Pu is bonded in a linear geometry to one O and one Br atom. The Pu–O bond length is 2.05 Å. The Pu–Br bond length is 2.64 Å. O is bonded in a linear geometry to two equivalent Pu atoms. Br is bonded in a single-bond geometry to one Pu atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2SiO10 by Materials Project

Pu2SiO10 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Pu is bonded to seven O atoms to form distorted PuO7 pentagonal bipyramids that share corners with two equivalent SiO4 tetrahedra, edges with two equivalent PuO7 pentagonal bipyramids, and an edgeedge with one SiO4 tetrahedra. There are a spread of Pu–O bond distances ranging from 1.78–2.43 Å. Si is bonded to four equivalent O atoms to form SiO4 tetrahedra that share corners with four equivalent PuO7 pentagonal bipyramids and edges with two equivalent PuO7 pentagonal bipyramids. All Si–O bond lengths are 1.64 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Pu atom. In the second O site, O is bonded in a 1-coordinate geometry to two equivalent Pu and one Si atom. In the third O site, O is bonded in a single-bond geometry to one Pu atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CePuFe4 by Materials Project

PuCeFe4 is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Pu is bonded in a 12-coordinate geometry to four equivalent Ce and twelve equivalent Fe atoms. All Pu–Ce bond lengths are 3.03 Å. All Pu–Fe bond lengths are 2.90 Å. Ce is bonded in a 12-coordinate geometry to four equivalent Pu and twelve equivalent Fe atoms. All Ce–Fe bond lengths are 2.90 Å. Fe is bonded to three equivalent Pu, three equivalent Ce, and six equivalent Fe atoms to form a mixture of face, edge, and corner-sharing FeCe3Pu3Fe6 cuboctahedra. There are three shorter (2.45 Å) and three longer (2.49 Å) Fe–Fe bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2HgGe by Materials Project

Pu2HgGe is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to four equivalent Hg and four equivalent Ge atoms. All Pu–Hg bond lengths are 3.12 Å. All Pu–Ge bond lengths are 3.12 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent Pu atoms. Ge is bonded in a body-centered cubic geometry to eight equivalent Pu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PuPbAu2 by Materials Project

PuAu2Pb is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to eight equivalent Au and six equivalent Pb atoms. All Pu–Au bond lengths are 3.10 Å. All Pu–Pb bond lengths are 3.58 Å. Au is bonded in a body-centered cubic geometry to four equivalent Pu and four equivalent Pb atoms. All Au–Pb bond lengths are 3.10 Å. Pb is bonded in a 8-coordinate geometry to six equivalent Pu and eight equivalent Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2SbAu by Materials Project

Pu2AuSb is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to four equivalent Au and four equivalent Sb atoms. All Pu–Au bond lengths are 3.22 Å. All Pu–Sb bond lengths are 3.22 Å. Au is bonded in a body-centered cubic geometry to eight equivalent Pu atoms. Sb is bonded in a body-centered cubic geometry to eight equivalent Pu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2I2O by Materials Project

Pu2OI2 is Cyanogen Chloride-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is zero-dimensional and consists of one Pu2OI2 cluster. Pu is bonded in a distorted linear geometry to one O and one I atom. The Pu–O bond length is 2.02 Å. The Pu–I bond length is 2.85 Å. O is bonded in a linear geometry to two equivalent Pu atoms. I is bonded in a single-bond geometry to one Pu atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2SnHg by Materials Project

Pu2HgSn is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pu is bonded in a body-centered cubic geometry to four equivalent Hg and four equivalent Sn atoms. All Pu–Hg bond lengths are 3.28 Å. All Pu–Sn bond lengths are 3.28 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent Pu atoms. Sn is bonded in a body-centered cubic geometry to eight equivalent Pu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2SbTe2 by Materials Project

Pu2SbTe2 crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. Pu+3.50+ is bonded to two equivalent Sb3- and five equivalent Te2- atoms to form a mixture of distorted edge, corner, and face-sharing PuSb2Te5 pentagonal bipyramids. Both Pu–Sb bond lengths are 3.25 Å. There are four shorter (3.10 Å) and one longer (3.19 Å) Pu–Te bond lengths. Sb3- is bonded in a 4-coordinate geometry to four equivalent Pu+3.50+ atoms. Te2- is bonded to five equivalent Pu+3.50+ atoms to form a mixture of distorted edge and corner-sharing TePu5 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3Pu by Materials Project

Li3Pu crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded in a 12-coordinate geometry to four equivalent Li and four equivalent Pu atoms. All Li–Li bond lengths are 3.11 Å. All Li–Pu bond lengths are 3.30 Å. In the second Li site, Li is bonded in a square co-planar geometry to four equivalent Pu atoms. All Li–Pu bond lengths are 3.11 Å. Pu is bonded to twelve Li atoms to form a mixture of edge, face, and corner-sharing PuLi12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pu2Re3Si5 by Materials Project

Pu2Re3Si5 crystallizes in the tetragonal P4/mnc space group. The structure is three-dimensional. Pu+3.50+ is bonded in a 9-coordinate geometry to nine Si4- atoms. There are a spread of Pu–Si bond distances ranging from 2.88–3.21 Å. There are two inequivalent Re+4.33+ sites. In the first Re+4.33+ site, Re+4.33+ is bonded to six Si4- atoms to form a mixture of distorted corner, edge, and face-sharing ReSi6 octahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Re–Si bond distances ranging from 2.45–2.54 Å. In the second Re+4.33+ site, Re+4.33+ is bonded in a distorted hexagonal planar geometry to six Si4- atoms. There are four shorter (2.46 Å) and two longer (2.70 Å) Re–Si bond lengths. There are three inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to three equivalent Pu+3.50+, four Re+4.33+, and two equivalent Si4- atoms. Both Si–Si bond lengths are 2.59 Å. In the second Si4- site, Si4- is bonded in a 11-coordinate geometry to four equivalent Pu+3.50+, three Re+4.33+, and four Si4- atoms. Both Si–Si bond lengths are 2.70 Å. In the third Si4- site, Si4- is bonded in a 9-coordinate geometry to four equivalent Pu+3.50+, four equivalent Re+4.33+, and one Si4- atom. The Si–Si bond length is 2.42 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Post-irradiation examinations of annular mixed oxide fuels with average burnup 4 and 5% FIMA

In this paper, we present post-irradiation examination results on two type of annular mixed oxide fuel pins irradiated in the Fast Flux Test Facility (FFTF) sodium cooled reactor to an average burnup between 4% and 5% fission of initial heavy atom (FIMA). The pins differed only from the initial Pu content, which was 22 wt% and 26 wt%, respectively. The overall performance of the pins was excellent, in line with previous historical results. The pins with higher Pu content experienced higher irradiation temperatures which influenced the fission gas release, fuel swelling, and Cs distribution compared to the other pins. All the post-irradiation examinations results are discussed against the irradiation parameters. In particular, the pins with higher initial Pu content, i.e., 26 wt%, experienced higher power that resulted in enhanced fission gas release compared to the other two pins with 22 wt% initial Pu content. For the pins with higher fission gas release, onset of Cs redistribution was observed. The two pins that had lower initial Pu content and burnup showed a Cs axial distribution similar to the as-produced one.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗