TY - BOOK
T1 - The reliability of solubility data
T2 - Results from a limited literature survey focusing on Ni, Pd and Np
AU - Carlsson, Torbjörn
AU - Vuorinen, Ulla
N1 - Project code: K8SU00067
PY - 1998
Y1 - 1998
N2 - The performance assessment (PA) of, e.g., repositories
for spent nuclear waste needs data that relies on
databases containing large amounts of chemical
thermodynamic data. It is evident that the quality of
such data should be good, in the sense that its
uncertainties and origin, etc. should be well documented.
The presence of erroneous data might make the outcome of
the PA doubtful, in the worst case even partly worthless.
However, the task of checking the quality of data is far
from effortless and demands a considerable amount of time
and money.
The objective of this work was to examine, within limited
resources, the solubility data for three elements of
interest, for example, in the safety analyses of
repositories for nuclear waste. The elements studied were
nickel, palladium, and neptunium. In order to delimit the
topic, this report deals only with a small number of
relevant species; the discussions of the solubilities of
nickel, palladium and neptunium are mainly restricted to
sulphides, oxide/hydroxide, and phosphates, respectively.
The report discusses some general difficulties associated
with "data evaluation", and presents the outcome of a
minor literature survey on the solubility studies for
nickel, palladium, and neptunium, respectively. The
results indicate that in the case of palladium, few
published data exist. This is however not alarming since
palladium, being a member of the platinum group metals,
is known to have considerable stability in the
environment. In the cases of nickel and neptunium, it was
found that there is a lack of proper solubility data. The
report does not discuss whether this is serious or not,
since this depends on the system studied and the
conditions considered.
AB - The performance assessment (PA) of, e.g., repositories
for spent nuclear waste needs data that relies on
databases containing large amounts of chemical
thermodynamic data. It is evident that the quality of
such data should be good, in the sense that its
uncertainties and origin, etc. should be well documented.
The presence of erroneous data might make the outcome of
the PA doubtful, in the worst case even partly worthless.
However, the task of checking the quality of data is far
from effortless and demands a considerable amount of time
and money.
The objective of this work was to examine, within limited
resources, the solubility data for three elements of
interest, for example, in the safety analyses of
repositories for nuclear waste. The elements studied were
nickel, palladium, and neptunium. In order to delimit the
topic, this report deals only with a small number of
relevant species; the discussions of the solubilities of
nickel, palladium and neptunium are mainly restricted to
sulphides, oxide/hydroxide, and phosphates, respectively.
The report discusses some general difficulties associated
with "data evaluation", and presents the outcome of a
minor literature survey on the solubility studies for
nickel, palladium, and neptunium, respectively. The
results indicate that in the case of palladium, few
published data exist. This is however not alarming since
palladium, being a member of the platinum group metals,
is known to have considerable stability in the
environment. In the cases of nickel and neptunium, it was
found that there is a lack of proper solubility data. The
report does not discuss whether this is serious or not,
since this depends on the system studied and the
conditions considered.
KW - solubility
KW - spent nuclear fuels
KW - nickel
KW - palladium
KW - neptunium
KW - inorganic compounds
KW - thermodynamic properties
KW - data
KW - verification
KW - reliability analysis
M3 - Report
SN - 951-38-5477-9
T3 - VTT Tiedotteita - Meddelanden - Research Notes
BT - The reliability of solubility data
PB - VTT Technical Research Centre of Finland
CY - Espoo
ER -