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
(2) Discharge pool water whose radioactivity concentration meets the criteria for
drain
When radioactivity concentration of the supernatant is lower than the criteria for
discharge based on the results in the step “3 (2) Measure radioactivity before the
starting the procedures”, the supernatant can be discharged without providing a
treatment using the zeolite, however, pH of the supernatant needs to be checked
for the compliance with the criteria for discharge established by the Ministry of
Environment.
(a) In order to secure a discharge flow path, remove mud and fallen leaves
accumulated in the flow path such as drain gutters and foot washing pond
around the swimming pool for discharging water that meets the criteria for
discharge.
Put collected mud and fallen leaves into plastic bags with a serial number. The
mouth of the bags shall be twisted, folded back and closed with a banding band.
Put the bags into additional plastic bags, forming a double packing. The outer bag
shall also be twisted, folded back and closed with a banding band.
Measure the dose rate of each bag at the surface using a radiation detector. If
possible, weigh the bag (weight by the kilogram is acceptable). Write down the
results in the form, “Record 7: Dose rate measured on the surface of bags that
contains mud accumulated at the discharge flow path”.
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