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The Journal of the Oceanographical Vol.20, No.4, October 1964 Society Studies on the Radioactive Tadayoshi Abstract: SASAKI, The corrosion active wastes As the into sea hydraulic wastes and then NaCl as to the As for about between the to sec ion, respectively), than 10-9 however, are of water-soluble the diffusion a and of solution diffusion we is about continuously radio-isotope mortar step, the in Moreover, (D) and the when estimated that D is and equal P above- container wall made obtained from to P in mortar of standard "the when factors, proportion is relationship permeability both nitr- diffusion two following than The silver to the larger paper by that the experiments this titration attributed of are diffusion the of mortar high radio- molecular define obtained of soluble the mainly we radio- investigate authors the and of conditions water the of coefficient D the reported porosity coefficient 3.16•~10-5, be is container disposal to in method which and of order are will the the constant in the diffusion which by the report action In the mortar" first mortar to that the investigation, physical cm/sec contamination in the the feared on the previous water determined coefficient only the In the where (cm2/sec, Considering neglect at was the in 4•~10-9(cm2/sec) diffusion a•~P0.5, tracer energy to out WATANABE, container by sea diffusion ion is diffusing chloride a MOHR mortar" 1.4•~10-9 equal F on is container carried the concrete it of reference in surrounding were strength the floor, the Sea-II KISHINO with described sea from results chloride in namely, out studies of hydraulic into deep the Motoaki covering, been the solution according coefficient have the leak "The concentration ate on problem, the metal permeates contaminate mortar using sea easily may may mentioned of the water pressure active on the Disposing OKAZAKI, Seiichi OSHIBA and of for into Moriyoshi investigation resistance Container Wastes Gohachiro the of Japan (P), i e 10-9(cm2/sec, D and D cm/ P are smaller respectively) the of present sea carrying as results water out a tracer, with resulting the from similar for respect the studies purpose to chloride the diffusion on of the getting ion, in diffusion more we could mortar making details not We, use about is Table Proportion C: cement S: sand h s p.: high-early-strength p.: Table portland Sieve analysis and several W: water portland constants of test pieces (mortar) cement cement data of the sand Fig The size distribution of the sand Fig The apparatus for measuring the permeability (made of stainless steel, 250 kg/cm2 max.) Fig The apparatus for measuring the diffusion (made of hard vinyl-chloride plastics) Table An example on the chlorine water (Test piece No.1-8) concentrations of NaCl solution and of fresh Fig An example of the coefficient of permeability determined from the day to day variation, graphically.(Test piece No.3-2) Fig A relation between the curing age and the permeability (volume percentage) in mortar (after ONO (19 59)15)) Fig Fig An experimental relation between the cement percentage and the coefficient of permeability of test pieces (mortar) An example of the day to day variations in chlorinity of NaCl solution (Test piece No.3-2) Fig An example of the day to day variations in chlorinity of the fresh water (Test piece No.3-2) Fig Examples of the diffusion coefficient determined graphically from the day to day variations a) Test piece No.3-2 b) Test piece No.4-2 from water the chlorinity decrease of NaC1 solution Table Fig 10 The results and the conditions of the experiments diffusion in test pieces (mortar) The experimental relation between the coefficient of permeability and the diffusion coefficient calculated crease from of NaCl chlorinity for the the increase same chlorinity solution, •› coefficient of defrom fresh of the water, permea- bility with which the result from NaC1 solution and that from fresh water coincide The broken lines indicate the distribution limits of the values, and the full line does the deducible terminal value of the diffusion coefficient for each coefficient of permeability on the permeation and the 11) CARRUTHERS, J N.(1962): bed currents, Measurement a new cheap method ed plan Nature, 195 (4845), 976-981 12) LAFOND,E C.(1962): Deep current ments with the Bathyscaph Res., 19, 115 of ocean and suggest- Trieste measureDeep Sea