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
viscosity of the water. The actual flow rate shall be obtained by the measurement
using a tank with a known volume or change in water level of the swimming pool
under the final set up of engine pumps, and suction and ejection ports.
(e) Take samples from the discharge water approximately every one hour to check
for the radioactivity concentration.
Water for sampling shall be put into a 10 L tank temporally as shown in the photo
below, and then samples shall be taken from the tank. Write down the obtained
radioactivity concentration of the discharge water in the form, “Record 8:
Radioactivity concentration of discharge water without decontamination
treatment – Sampled at ( )” for each pump.
Put the hose nozzle in the space
between the tray set on the bottom and
the side wall of the pool, and pump up
water while taking care of not pumping
precipitate.
(f) When the water level decreased to that lower than containers such as tray, put
the hose nozzle in the space between the tray and the side wall of the pool
where less precipitate is left (see photos below), and continue discharging of the
pool water.
- 135 -
- 135 -
Bottom of the pool just after the
discharge has been completed.