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