a
NUCLEAR SCIENCE ABSTRACTS» °°m ey
2882
29171
POLYMERIC CHROMIUMMD CUMDOLE ST
ING FROM THE NEUTRON IRRADIATION OF CAL: 2
POTASEIUS CIIROMATE.
I
EFFECT OF PERICI
tESULTINE
fF ORDA}
DIATION ON THE SPECIBPIC ACTIVITY AND DE Ct do or
THE MANNER IN WHICH MONO- AND TOLISNUCLE Po
Yee TL
Me
Ts oebe
oy
ma ha prea (Soe Srained
° «
a
wth ihe tnitial Inge eri HO.
various mono- and polynuclear recoil products of chromiumdll)
produced by thermal neutron capture in crystulline K,CroOy were
investigated as a function of neutron dose, For all neutron doses
under investigation the highest enrichment factors for *'Cr were
observed in the fraction of the (presumably) trimeric complex.
|
The enrichment factors for all cationic fractions decreased with
increasing neutron dose. A mechanism for the formation of the
mono- and polynuctear recoil products as a consequenceof the
(n,y) reaction in crystalline K,CrO, is discussed. (auth) (UK)
crease {nm sorption capaci, for the removal of cesinm ion was ae
Refer also to abstract 29169
29172
THERMAL ANALYSIS OF PROMETHIUM OXALATE,
McNeilly, C. E.; Roberts, F.P, (Battelle-Memorial Inst.,
Richland, Wash,), Contract AT(45-1)-1830. pp 727-38 of Ther-
mal Analysis,
Vol. 2.
/Schwenker, Robert F. Jr. (ed.).
Vet crotseulor rate*sarsing | of. , &
bemvecen 2.2 to 2.00 cre ford tobe cra:
2 far removal of 7
roedioactive cesium from liquid wact) . Wha the tiesaere in
initial ingradients £10. Al.9, colecuiar racial eyor a4. 3,ade-
ot served. (auth)
.
ft
< #
wo a,
29178. (BARC-516) RECOVERY OF PROM:oTHIUM FROM - ey {
FISSION PRODUCT WASTE. PART II, USE OF }MANGANESE
DIOXIDE COLUMN ADSORPTION FOLLOWED BY ANION EX--.- . .
CHANGE ELUTION. Shuk!a, J, P.; Chandrasekharan, E, 5.5 .. ot
Rengan, K, (Bhabha Atomic Research Centre, Bombay (india)). nd
1970,
17p.: Dep, NTIS (U.S, Sales Only),
ae SO
Experiments were carried out to evolve a simple procedure:dite
for recovery of '’Pm from nuclear fucl reprocessing wastes.° T¥>.
Radiochemistry
New
York; Academic Press, Inc, (1969).
From second international conference on thermal analysis; Worcester, Mass. (18 Aug 1968)..See CONF-680851.
Differential therma! analysis (DTA) and thermogravimetric
analysis (TGA) were used to study the decomposition of promethium oxalate. TGA results were quite similar to those for
samarium oxalate, as expected, however, the DTA resulta were
almost entirely different, with respect to both types and temperatures of reaction, The starting material was shown by TGA to
‘
wastes with CaCh+
PRODUCTS ARE FCRMED,
Guetlich, P.; roehlich, KL. Odar, S,
(Technische Hochschule, Darmstadt. Ger,}, 7. Inorg, Mual, Chem;
33: 621-9(Mar 1971). (Jn German).
The Cr activity distribution and the specific activity of the
:
aad at utemperature fi: roximat. ty 1u0°O, The prduct ree.
tuined wore aubjectsaa ox: way eee! 3‘Hons ‘and found to be of do“ws e
Rterstratified grou. : Un og onto
site farcily. ‘The sultabiies
.
OL. 2 synthetic pre |
a fie
Aes ‘ominatia 1 f veicactive,s pe
correspond to the formula Pm,(C,0),°3 H.O. Differential thermal
analysis, performed over a one-month period, showed a marked
change taking place in the material, presumably due to radiolytic
decay of '47Pm to "8m +8. Radiation damuge due to the beta
particles results in the formation of a material with the apparent
formula Pm,0,CO,°3 H,O as determined by TGA. (auth)
29173
CERTIFICATES OF RADIOACTIVITY STANDARDS,
Garfinkel, 5S, B.; Baerg, A, P.; Zigman, P. E, Washington, D, C.;
National Academy of Sciences, National Research Council (1966).
lip. Available from National Academyof Sciences, National
Research Council, Washington, D. C.
Features of a suitably informative and precise certificate for
radioactivity standards are described. Information that should be
on the certificate includes: parent nuclide, reference time and
date, activity per gram of solution, daughter activity, chemical
composition of solution, method of standardization, listing of
known radioactive impurities, type of irradiation, chemical and
isotopic composition of the target, method and date of chemical
purification, estimates of errors in standardization, composition
of the stated overall uncertainty, possible systematic errors, and
decay characteristics. (M.C.G.)
29174
USERS’ GUIDES FOR RADIOACTIVITY STANDARDS,
Kahn, B.; Choppin, G. R.; Taylor, J, G. V. Washington, D. C.;
National Academy of Sciences, National Research Council (1967).
43p. Available from National Academy of Sciences, National
Research Council, Washington, D.C.
Short guides to chemical and counting problems for common
standards are given. The guides are prepared separately for
these clements: Na, Mg, P, 8, Cl, K, Ca. Cr, Fe, Co, Zn, Ga,
As, Br, Kr, Sr, Y, Zr, Nb, Ru, Rh, Ag, Sn, Sb, Te, [, Cs, Ba,
rare earths, Au, Hg, Tl, Po, Rn, Ra, Th, U, Np, and Am. (M.C.G.)
Separation Processes
Refer also to abstracts 28979, 28999-29001, 29014, 29074, 29075,
29165, 29317, 293932, and 29413.
29175
(BARC-509) SYNTHESES OF PHYLLITIC MINERALS:
THEIR UTILISATION IN RADIOACTIVE WASTE TREATMENT,
Tl, FROM MIXED GELS OF SILICA AND ALUMINA IN PRESENCE
OF MAGNESIUM ACETATE AND SODIUM ACETATE, Brat,
Satya; Balu, kK, (Bhabha Atomic Research Centre, Bombay(Indla)).
1970, 23p. Dep. NTIS (U.S, Sales Only).
Syntheses of phyllitic silicate minerals were carried out using
silfca gel and mixed gels of silica and aluminain the presence
of magnesium acetate and sodium acetate at atmospheric pressure
Preliminary purification of Pm from associated fission products
{s readily accomplished by a MnO, column. Final purification of |
the Pm fraction from other rarc earth constituents was achieved. |ay :
by an anion exchanger using 20% 7M HNOs8
80% (CHOW (A) mix~ ) i ‘
ture as the eluant. (auth) =. *
ports
Reeeau
29177
* (CEA- R-4090) SEPARATION AND RECOVERY OF|
PERMANENT GASES BY PREPARATIVE CHROMATOGRAPHY, 43
Dupufs, Marie-Clatre; Lutz, Michci; Massimino, Daniel (Come:hs
missariat a |’Energie Atomique, Bruyeres-le- Chatel (France).P +
Centre d’Etudes}, Jan ig7l, 23p, (In French), Dep. NTIS-:
oy
(U. 8, Sales Onlf), eo
Fon Tee
Soeiat
The study and manufacture of a prepurative gas chromatogeaph
for the separation and quantitative recovery of the components of:
,
a given gas mixture are described, The factors influencing the
~4
separation and purity of each component prepared in this way are
demonstrated and may be chosen without restriction as a function: *
of the various gas mixtures to be treatcd. The main applications ’
of the proceas are: treatment of an Ar mixture containing Kr and’ —
Xe traces, treatment of Ar contaminated by tritium, and purifica-
tion of carbon dioxide labeled with ‘tc. (auth)
291778
(CKA-R-4102) TOTAL ELEMENTARY SEP.
‘panieion?
OF RARE EARTHS ON CATION EXCHANGE RESINS. Gusmini,- a
é,
Simone; Dubuqucy, Claude (Commissariat a l’Energie Atomiqua, - 4
Bruyeres-le-Chatel (France). Centre d'Etudes}, Jan inh, Bp.aos
(In French), Dep, NTIS (U. 8. Sales Only).
1
,
AP yo
Total separation of the rare earths with carrier on 2 cation wk ;
resin column was tnvestigaled by elution with ammonium lactate. »and a-hydroxyisobutyrate. The experimental conditions applicable.
as a function of the analytical reeds and time limits were defined. -i¢..
A lactate concentration gradient {a more suitable for fission pro~ ‘* 4
duct rare earths, while a better separation of the yttrium group -, 4
is obtained with a simultaneous pH and a~hydroxyisobutyrate con°
centration gradient. The whole rare earth group and yttrium can
be treated with a-hydroxyisobutyrate. Technical difficulties in- |»
volved in the elutton that condition the quality of the separation © -'~
are mentioned. The chemical separation and purification of the * "
rare earth group ig discussed. (auth)
;
2 ee, vt
.
an
wt
29179
PLANT.
(DOCKET- 50201-69)
WEST VALLEY REPROCESSING °
Environmental Report No. 9, July-December 1970.
clear Fue! Services, Inc., West Valley, N. Y.)Dep. NTIS.
Lob,
vs
Mar 197i,
(Nu-" 5
12p. 0...
eS whit
Gross radioactivity and concentrations of Sr, T, ty in sam‘ 4
ples of air, fallout, milk, water, and silt were measured. Air~ i
borne particulate activity continued to be less than pre-cperational
levels. Data are given in graphs. (M.C. G.)
29180
(DOCKET- 50201-70)
Se
aa
WEST VALLEY REPROCESS-
ING PLANT, Quarterly Report, January l~March 31,1971. © ©? eo
{Nuclear Fuel Services, Inc., West Valley, N. ¥.}.
9p. Dep. NTIS,
. a
20 Apr 1971, & =
.
a
Reports on environmental monitoring, low-level liquid effluenta,
stack effluents, and surveillance tests are reported. Datagre .
..
given on amounts of gross a, gross8, tritium, gr,a ‘M7,"and
"Kr, (MCG)
29181
oat, '
Amobs
oye
t
¢
(GEPP-85)" PRODUCTION OF ‘BULK QUANTITIES OF
-
ULTRAPURE ERBIUM, Parsons, N. H. {General Electric Co,,
St, Petersburg, Fla. Neutron Devices Dept.). 10 Mar 1971, °—
Contract AT(29-2)~656, 19p. Dep. NTIS.
A vacuum distillation operation is described for the reprocessing
of erbium. This distillation method is capable of increasing the
purity of commercially available erbium up to 99.96 wt%i by mass
spectrographic analysis. (auth)