[1D14-19] 1F 2

4:25 PM - 4:40 PM JST(7:25 AM - 7:40 AM UTC)

[1D15] Study on the total optimization of Solid Waste management of 1F(2) Purpose of the Study for Rational Management of ALPS Slurry and Its Waste Characteristics

*Takao Ikeda¹, Mitsuki Amano¹, Masaki Kobayashi¹, Yukiko Fukaya², Hideyuki Yokota³, Kyoichi Asano³, Masamichi Obata³, Kazuyuki Kato⁴, Tatsuji Yoshioka⁴, Ryu Kaneko⁴ (1. JGC, 2. JANUS, 3. TEPCO HD, 4. NDF)

Keywords:

Carbonate slurry,Iron coprecipitation slurry,Waste characteristics

ALPS slurry (carbonate and iron co-precipitate slurries) constitutes a major portion of secondary waste from the water treatment process at Fukushima Daiichi NPS (1F). As stabilization measures take shape, priority is being given to developing management strategies for its storage, treatment, recycle, and disposal. Initial efforts focus on characterizing its properties. Radiologically, Sr-90 dominates, followed by Cs-137. Sr-90 shows a bimodal distribution, likely reflecting changes in upstream treatment. Levels of C-14 and I-129, important for disposal, are presumed to be limited. Chemically, the slurry consists of carbonates and iron hydroxides from coagulation-sedimentation, and some batches exhibit high salinity due to early seawater use. Characterization is ongoing and will be updated.