JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構
JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構
JAEA-Testing-2011-007.pdf:46.74MB - 日本原子力研究開発機構
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<strong>JAEA</strong>-<strong>Testing</strong> <strong>2011</strong>-007<br />
<strong>JAEA</strong>-<strong>Testing</strong> <strong>2011</strong>-007<br />
【Remove water from the precipitate】 0.5 – 2 days<br />
Drip water using a filter with a filter cloth. The time required will depend on<br />
volume and condition of the precipitate as well as weather.<br />
【Treatment of water not meeting the criteria for discharge (2nd treatment)】 1<br />
day<br />
Pump up the pool water containing precipitate in the swimming pool into the 1<br />
ton plastic tanks. Measure radioactivity concentration of the supernatant in<br />
each tank, and if it meets the criteria for discharge, discharge the supernatant.<br />
If it does not meet the criteria, provide additional treatment. Feed the zeolite<br />
and flocculant and leave it at rest for one night (2nd treatment). The next day,<br />
measure the radioactive concentration of the supernatant to confirm the<br />
compliance to the criteria, and discharge it.<br />
【Conditioning and packing of the sludge】 1.5 – 2 days<br />
Feed the precipitate left on the bottom of the tanks to the filter with a filter<br />
cloth at a small feed rate to remove water.<br />
Discharge the filtrated water after confirming the compliance to the criteria for<br />
discharge, or if not, provide further treatment using the zeolite.<br />
Pack residual sludge into plastic bags together with the filter cloths.<br />
【Cleaning of the swimming pool】 0.5 day<br />
Clean inside and around the swimming pool without water.<br />
It can be conducted in parallel with the treatment and packing of the sludge.<br />
【Cleanup】 3 hours<br />
Cleanup the work area.<br />
Finally, check the personal dosimeters and make documents of personal<br />
exposure doses of the staffs.<br />
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