JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構

JAEA-Testing 2011-007
JAEA-Testing 2011-007
(c) Secondary treatment of the water left in the 1 ton plastic tanks
Similar to precedent works, feed 100 g of the zeolite and 150 mL of the flocculant
(PAC solution) into each 1 ton plastic tank.
Pour suspended zeolite solution prepared in a separate container and stir it with a
long handle ladle. After 30 minutes, add 150 ml of the flocculant (PAC solution)
and stir it with a long handle ladle.
Keep the plastic tank at rest for one night to allow the zeolite and flocculant
functioning sufficiently effective.
Secondary treatment using the zeolite: Feed 100 g/ton of zeolite, and
150 ml/ton of flocculant (PAC, and leave it for one night.)
Feed the zeolite and stir with a ladle. Feed the PAC and stir with a ladle.
(d) Measure radioactivity of the supernatant, and discharge it when it meet the
criteria.
Measure the radioactivity of the supernatant in each plastic tank. Write down the
measurement results in the form, “Record 13: Radioactivity concentration in the
pool water and precipitate after the 2nd treatment”
Discharge the supernatant using a medium capacity engine pump while taking
care of not to pump precipitate when the radioactivity concentration meets the
criteria for discharge. When it does not meet the criteria for discharge, provide 3rd treatment as described in the section (e).
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