Tritium water in precipitation in Tokyo by SAITO Masaaki, TAKATA Shigeru, ITO Nobuhiko Tokyo Metropolitan Isotope Reserch Cenetr Tokyo Metropolitan Industrial Research Institute Komazawa Setagaya-ku, Tokyo, Japan ---------- Everyone can cite data. Please describe as follows. 'SAITO M.: Tokyo Metropolitan Industrial Research Institute, Private communication' ---------- Year/ Month/ Precipitation(mm)/ Tritium (Bq/kg) 1978 4 4.3 1978 5 4 1978 6 3.1 1978 9 3.9 1978 11 2.2 1979 2 2.1 1979 3 2.4 1979 4 3.5 1979 5 3.3 1979 6 2.8 1979 7 3.6 1979 8 2.5 1979 9 2.6 1979 10 2.5 1979 11 2.3 1979 12 2.2 1980 1 2.2 1980 2 3.1 1980 3 3.1 1980 6 4.1 1980 7 4.1 1980 8 2.9 1980 11 1.9 1980 12 4.9 1981 1 4.9 1981 2 4.9 1981 3 4.9 1981 4 5.3 1981 5 1.7 1981 6 1.7 1981 7 2.2 1981 8 2 1981 9 1.6 1981 10 1.2 1981 11 1.9 1981 12 1.9 1982 1 4.5 1982 2 4.5 1982 3 2.8 1982 4 3 1982 5 3 1982 6 2.6 1982 7 1.8 1982 8 1.1 1982 9 1.3 1982 10 1.9 1982 11 1.7 1983 4 1.3 1983 5 1.2 1983 6 2.3 1983 7 2 1983 8 0.5 1983 9 0.8 1983 10 0.8 1983 11 1.4 1988 2 18.3 1.3 1988 4 127 1.04 1988 5 124.2 1.49 1988 6 229.6 1.05 1988 7 174.5 1.44 1988 8 339.9 0.72 1988 9 246.4 0.83 1988 10 62.4 1.01 1988 11 21 1.18 1989 1 94 0.75 1989 2 133.4 0.98 1989 3 110 1.19 1989 4 172 0.93 1989 5 149 1.71 1989 6 206 0.93 1989 7 594 0.78 1989 8 404 0.47 1989 9 114 0.57 1989 10 198 0.77 1989 11 55 0.76 1989 12 28 0.6 1990 1 84 0.75 1990 2 109 0.74 1990 4 130 0.86 1990 5 66 1.05 1990 6 67 0.73 1990 7 71 0.79 1990 8 116 0.78 1990 11 219 0.76 1991 4 96 0.93 1991 5 57 1.29 1991 6 89 1.01 1991 7 55 0.79 1991 8 176 0.53 1991 9 461 0.4 1991 10 532 0.37 1991 11 111.3 0.35 1991 12 45.4 0.78 1992 1 68.9 0.63 1992 3 202.3 0.74 1992 4 170.9 0.77 1992 5 152.1 1.12 1992 6 248.7 0.76 1992 7 89.8 0.97 1992 8 18.9 0.72 1992 9 102.7 0.57 1992 10 312.8 0.49 1992 11 155.3 0.36 1992 12 77.3 0.41 1993 1 119.3 0.6 1993 2 57.2 0.37 1993 3 73.4 0.59 1993 4 45.7 0.99 1993 5 57.4 0.75 1993 6 190.8 1.04 1993 7 358.2 0.4 1993 8 394.5 0.29 1993 9 147.2 0.62 1993 10 164.4 0.46 1993 11 172.6 0.46 1993 12 67.7 0.63 1994 1 49 0.78 1994 2 83.2 0.57 1994 3 117.3 0.81 1994 4 54.2 1.01 1994 5 152.5 0.39 1994 6 152.6 0.85 1994 7 62.5 0.52 1994 8 230.9 0.41 1994 9 254.8 0.49 1994 10 62.7 0.36 1994 11 51.9 0.32 1994 12 24.6 0.48 1995 1 39.3 0.25 1995 2 28.8 0.68 1995 3 175.6 0.53 1995 4 109.5 0.45 1995 5 226.3 0.74 1995 6 204.8 0.75 1995 7 192.3 0.48 1995 8 127 0.38 1995 9 152.9 0.3 1995 10 90.6 0.38 1995 11 53.6 0.29 1996 1 17.2 0.61 1996 2 53.7 0.69 1996 3 92.5 0.51 1996 4 124.3 0.66 1996 5 141.1 0.51 1996 6 42.4 0.54 1996 7 300.3 0.47 1996 8 34.4 0.62 1996 9 328.6 0.5 1996 10 66.8 0.61 1996 11 87 0.37 1996 12 52.9 0.31 1997 1 28.9 0.56 1997 2 30.4 0.4 1997 3 113 0.39 1997 4 143.4 0.69 1997 5 145.4 0.36 1997 6 176.2 0.44 1997 7 180.3 0.48 1997 8 108.4 0.71 1997 9 258 0.51 1997 11 104.3 0.39 1997 12 48.7 0.57 1998 1 100.4 0.46 1998 2 150.5 0.61 1998 3 64.7 0.9 1998 4 183 0.56 1998 5 152.3 0.47 1998 6 147 0.76 1998 7 155.4 0.63 1998 8 172.6 0.36 1998 9 274.1 0.47 1998 10 156 0.37 1998 11 10.2 0.82 1998 12 54.3 0.56 1999 1 25.3 0.52 1999 2 33.7 0.64 1999 3 154.5 0.6 1999 4 204.9 0.64 1999 5 118 0.48 1999 6 191.1 0.53 1999 7 230.5 0.33 1999 8 263.9 0.24 Similar to Ground Infiltration 1999 9 84.5 0.37 0.42 1999 10 94.1 0.41 0.83 1999 11 99.9 0.32 0.68 1999 12 ---- --- 0.94 2000 1 --- 0.46 0.71 2000 2 --- --- 1.14 2000 3 --- 0.51 0.80 2000 4 --- 0.93 0.85 2000 5 --- 0.84 0.99 2000 6 --- 0.61 0.83 2000 7 --- 0.36 0.43 2000 8 --- 0.40 0.48 2000 9 --- 0.28 0.35 2000 10 --- 0.36 0.58 2000 11 --- 0.32 0.55 2000 12&1 --- 0.43 0.53 2001 2 --- 0.72 0.71 2001 3 --- 0.81 0.78 2001 4 --- 0.65 0.85 2001 5 --- 0.62 0.63 2001/6-7/12 --- 0.76 0.97 (the rainy season) 2001/7/12-9/3 --- 0.34 0.36 2001 9 --- 0.23 0.43 2001/10-2002/2 --- 0.31 0.49 Niigata C 2001/11 0.41 2001/12 0.46 2002/01 0.43 2002/02 0.63 2002 03 --- 0.46 0.67 0.79 2002 04 --- 0.50 0.84 0.99 2002 05 --- 0.60 0.63 0.50 2002/06 0.72 2002 6-7 --- 0.49 0.52 0.48 2002/08 0.37 2002 7/23-9/17 0.40 0.4 ---- 2002/09 0.55 2002/10 0.43 2002/11 0.44 2002 9/17-1/28 0.37 0.46 ---- 2002/12 0.36 2003/01 0.51 2003 1/29-3/10 0.40 0.63 2003 3 0.75 0.81 0.69 2003 4 0.56 0.69 0.79 2003 5 0.92 0.92 0.56 2003 6 0.63 0.78 0.69-0.68 2003 7 c 0.56-0.50 2003 7/29-9/22 0.47 0.61 0.56-0.50 2003 9/23-11/4 0.27 0.56 0.44 2003 11 0.34 0.44 0.38 2003 12 0.44 0.67 降水トリチウム濃度観測値 （疑似地下浸透水） 単位 Bq/kg 札幌 新潟 東京全雨 東京 松山 2004/1 0.33 1.20 0.45 2004/2 0.58 1.20 0.45 2004/3 0.57 0.55 0.61 2004/4 0.96 0.51 0.48 2004/5 0.58 0.41 0.52 2004/6 0.54 0.44 0.45 2004/7 0.42 --- --- 2004/8 0.32 0.47 0.55 2004/9 0.30 0.38 0.49 2004/10 0.34 0.29 0.43 2004/11 0.45 0.35 0.44 2004/12 0.39 0.37 0.44 2005/1 0.36 0.50 0.49 2005/2 0.46 0.44 0.45 2005/3 0.86 0.72 0.55 2005/4 0.92 1.02 1.27 2005/5 0.92 1.58 1.85 2005/6 0.68 0.52 0.50 2005/7 0.41 0.75 0.48 0.57 0.27 2005/8 0.40 0.47 0.40 0.46 0.49 2005/9 0.81 0.46 0.43 0.38 0.14 2005/10 0.56 0.54 0.39 0.54 0.25 2005/11 0.67 0.58 0.62 0.34 2005/12 0.47 --- 0.95 0.70 2006/1 0.34 0.60 0.30 0.57 0.33 2006/2 0.81 0.36 0.57 0.33 2006/3 0.75 0.40 0.51 0.59 2006/4 1.08 0.60 0.67 0.54 2006/5 0.55 0.78 0.72 0.33 2006/6 0.80 0.31 0.48 0.37 2006/7 0.63 0.49 0.59 0.37 2006/8 0.57 0.62 0.36 0.28 0.25 2006/9 0.90 0.46 0.36 0.44 0.33 2006/10 0.69 0.30 0.30 0.23 0.33 2006/11 0.37 0.38 0.28 0.23 0.27 2006/12 0.48 0.48 0.22 0.34 0.30 2007/1 0.48 0.37 0.35 0.46 0.34 2007/2 0.28 0.35 0.50 0.41 2007/3 0.64 0.61 0.33 0.41 0.56 2007/4 1.24 0.92 0.83 0.67 0.67 2007/5 0.93 0.84 0.47 0.55 0.66 2007/6 1.10 0.74 0.61 0.65 0.45 2007/7 1.37 0.26 0.26 0.30 0.20 2007/8 0.50 0.22 0.49 0.82 0.24 2007/9 0.47 0.24 0.25 0.32 0.12 2007/10 0.58 0.43 0.21 0.38 0.28 2007/11 0.40 0.29 0.43 0.36 0.32 2007/12 0.26 0.42 0.52 0.45 2008/1 0.40 0.43 0.85 0.31 2008/2 0.45 0.78 0.46 0.57 0.50 2008/3 0.86 0.46 0.63 0.70 2008/4 1.04 0.87 0.46 0.57 0.45 2008/5 0.79 0.64 0.42 0.53 0.48 2008/6 0.85 0.65 0.47 0.61 0.35 2008/7 0.81 0.72 0.52 0.44 0.26 2008/8 0.51 0.76 0.21 0.31 0.40 2008/9 0.41 0.77 0.29 0.37 0.35 2008/10 0.56 0.59 0.26 0.37 0.23 2008/11 0.46 0.59 0.31 0.55 0.30 2008/12 0.56 0.34 0.30 0.32 2009/1 0.52 0.26 0.44 0.40 2009/2 0.47 0.54 0.46 0.41 0.43 2009/3 0.81 0.35 0.40 0.37 2009/4 0.72 0.83 0.23 0.38 0.44 2009/5 0.71 0.70 0.48 0.47 0.33 2009/6 0.75 1.27 0.42 0.42 0.40 2009/7 0.48 0.55 0.31 0.38 0.21 2009/8 0.64 0.39 0.37 0.29 0.12 2009/9 0.55 0.74 0.42 0.42 0.24 2009/10 0.53 0.46 0.24 0.28 0.29 2009/11 0.47 1.09 0.19 0.25 0.22 2009/12 0.61 0.26 0.26 0.37 2010/1 0.50 0.41 0.48 0.37 2010/2 0.34 0.86 0.38 0.44 0.30 2010/3 1.10 0.37 0.54 0.45 2010/4 0.92 0.89 0.44 0.41 0.35 2010/5 0.74 0.61 0.67 0.54 0.44 2010/6 1.00 1.09 0.38 0.52 0.33 2010/7 0.68 0.55 0.23 0.42 2010/8 0.33 0.25 0.18 0.19 0.15 2010/9 0.42 0.23 0.20 0.29 0.27 2010/10 0.51 0.76 0.20 0.24 0.26 2010/11 0.54 0.77 0.30 0.27 0.37 2010/12 0.37 0.22 0.31 0.23 2011/1 0.35 0.43 2011/2 0.56 0.49 0.35 0.43 2011/3 2.50 (3.7 ;20113/21 ;no enrichment) 2011/4 1.64 (5.1 ;2011/4-5) 2011/5 0.81 (0.5 ;no enrichment) 2011/6 1.18 2011/7 0.39 2011/8 0.58 (0.32 ;no enrichment) 2011/9 0.21 2011/10 0.38 2011/11 0.10 2011/12 0.69 2012/01 0.64 2012/02 0.95 2012/03 0.66 2012/04 0.84 2012/05 2012/06 2012/07 2012/08 2012/09 2012/10 -------------------------------------- Spec of the Conditions Electrolysis Cell: 78-89/10=Ni cathode Na2O2 , 89/11-95/3= Fe cathode Na2O2, 95/4- =SPE computer control:89/11- Sample water V: 78-84=1600g, 88-92/4=200g, 92/5-95/3=300, 95/4-97/11=500g, 97/12-99/2=1000g, 97/12-99/2=1200g LSC: 77-84=Aloka LB1, 88/2-94/4= Packard 2250CA, 94/5-97/11=Packard 2750TR/LL, 97/12-= Aloka LB5 Counting Vial/W: 88/2-92/4=Glass 20ml/9.00g, 92/5-97/11=Low deffusion polyethyrene 20ml/9.00g, 97/12-= Low deffusion polyethyrene 100ml/40.00g Scintillator: **-**=Aqua sol, 88/2-97/11=Picoflour LLT, 97/12-= Scintisol EXH Counting time: **-92/8=500min, 92/9-=1000min Counting error: sigma ＝0.09Bq/kg sigma ＝0.03Bq/kg Alkaline Electrolysisi: -95/4 Solid Polumer Electrolysis: 95/5- -------------------------------------------