With regard to previous press releases concerning results of nuclide
analyses of radioactive materials at Fukushima Daiichi Nuclear Power
Station of TEPCO, it has been confirmed that there were some incorrect
descriptions and therefore we hereby would like to correct them as follows
and in the attachment.
(1) Clerical errors on density limit by the announcement of reactor
regulation and half-life
In the press releases there were some clerical errors on density limit by
the announcement of reactor regulation and half-life.
(2) Errors on measured value
In the press releases there were some errors on measured values in some
results of nuclide analyses.
(3) Errors on scaling factors
In the press releases there were some errors on scaling factors which were
calculated as the ratio of density of sample (measured value) to density
limit by the announcement of reactor regulation.
(4) Errors on a unit in measured values
In the press releases we partly used Bq/cm3 instead of Bq/Kg by
(5) Errors on calculation formula
In the press releases we used wrong calculating formulas and as a
result we announced wrong measured values.
-A set of the data and materials on past nuclide analyses in question and
for correction(PDF 297KB)