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
Take care not to raise the precipitate during setting the suction port when water
level comes near the bottom at a later stage.
Prepare a 100 L tank
and weight
The tank produces
slow suction flow,
causing little
disturbance of the
bottom region
Tray (15 cm H) set on
the bottom
(d) Start discharging.
The tank allows
discharging the water
to the level of the tank
height (40 cm)
Set a tank on the bottom to
pump up with a medium
pump
Continue discharging with
a medium pump
Discharge to the pool side gutter
Control discharge rates while observing the flowing condition at the drain gutter.
The capacity (flow rate) of each engine pump described in catalogues may vary
depending on the difference of heights between suction and ejection ports and
- 134 -
- 134 -
Prepare a tray and
weight
Pour water into the tray
with a ladle to set slowly
on the bottom
Set shallow tray on the
bottom with a weight
For further discharge
of the water, set two
trays using weight on
the bottom at the
center of the pool.
20 cm: lowest at the
center
For further discharge
of the water, change
the tray with
shallower ones to
continue discharging
water at two points in
the center.
Discharging with a medium pump
Periodical sampling & radioactivity
concentration check