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高エネルギー加速器研究機構 http://rcwww.kek.jp/norm/index-e.html 2011 年 4 月 20 日 11:28 分現在 0.11 μ Sv/h ------------------------- 平常時 0.07-0.09 μ Sv/h 3 月 14 日 3 月 15 日 http://rcwww.kek.jp/norm/index-e.html 3

3 月 15 日 3 月 15 – 16 日 Chart 1 Result of first measurement: Detected nuclide and its concentration (Bq/cm 3 ) Chart 2 (Bq/cm 3 ) Measurement period:15 March, 2011 14:39-15 March,2011 17:34 Measurement period:15 March, 2011 17:48 - 16 March,2011 8:48 Air collected:105 cubic meter Air collected:540 cubic meter Nuclide CONC.(Bq/cm 3 ) Nuclide CONC.(Bq/cm 3 ) 3.0 × 10 -5 2.1 × 10 -5 Iodine131 Iodine131 2.0 × 10 -5 4.9 × 10 -6 Tellurium132 Tellurium132 6.7 × 10 -7 6.6 × 10 -7 Caesium134 Caesium134 1.2 × 10 -7 1.1 × 10 -7 Caesium136 Caesium136 6.5 × 10 -7 6.5 × 10 -7 Caesium137 Caesium137 8.1 × 10 -7 1.2 × 10 -6 Tellurium129m Tellurium129m 5.6 × 10 -7 1.3 × 10 -6 Iodine133 Iodine133 3.6 × 10 -8 3.7 × 10 -8 Technetium99m *1 Technetium99m *1 2011 年 3 月 15 日 2011 年 3 月 15-16 日 *1 Technetium99m is a daughter nuclide of molybdenum-99, and the measured value varies with the time duration between the air sampling and the measurement. 3 月 16 日 3 月 16 – 17 日 Chart 4 (Bq/cm 3 ) Chart 3 (Bq/cm 3 ) Measurement period:16 March, 2011 17:21-17 March,2011 9:21 Measurement period:16 March, 2011 9:08-17:08 Air collected:576 cubic meter Air collected:288 cubic meter CONC.(Bq/cm 3 ) CONC.(Bq/cm 3 ) Nuclide Nuclide 3.2 × 10 -5 2.7 × 10 -7 Iodine131 Iodine131 3.0 × 10 -6 7.8 × 10 -9 Tellurium132 Tellurium132 5.2 × 10 -7 2.9 × 10 -9 Caesium134 Caesium134 Caesium136 7.9 × 10 -8 Caesium136 no detection *2 5.0 × 10 -7 2.1 × 10 -9 Caesium137 Caesium137 9.0 × 10 -7 Tellurium129m Tellurium129m no detection 3.6 × 10 -7 6.5 × 10 -9 Iodine133 Iodine133 Technetium99 *1 2.0 × 10 -8 Technetium99 *1 9.9 × 10 -9 2011 年 3 月 16 日 2011 年 3 月 16 - 17 日 *2 [Correction] Caesium136 was not detected. Previous data 3.9 × 10 -8 was mistakenly described from the old sample. We are sorry for this mistake. (Mar/28 17:00) 4

3 月 17 – 18 日 3 月 18 – 20 日 Chart 6 (Bq/cm 3 ) Chart 5 (Bq/cm 3 ) Measurement period:18 March, 2011 10 ： 16-20 March,2011 9:55 Measurement period:17 March, 2011 10:07-18 March,2011 10:07 Air collected:864 cubic meter Air collected:1715 cubic meter Nuclide CONC.(Bq/cm 3 ) Nuclide CONC.(Bq/cm 3 ) 3.2 × 10 -7 4.9 × 10 -7 Iodine131 Iodine131 3.8 × 10 -9 1.2 × 10 -9 Tellurium132 Tellurium132 2.4 × 10 -9 1.1 × 10 -9 Caesium134 Caesium134 3.5 × 10 -10 Caesium136 Caesium136 no detection 2.1 × 10 -9 1.1 × 10 -9 Caesium137 Caesium137 Tellurium129m no detection Tellurium129m no detection 3.8 × 10 -9 1.2 × 10 -9 Iodine133 Iodine133 Technetium99m *1 no detection Technetium99m *1 no detection 2011 年 3 月 17 - 18 日 2011 年 3 月 18 - 19 日 3 月 20 – 22 日 3 月 22 – 23 日 Chart 7 (Bq/cm 3 ) Chart 8 (Bq/cm 3 ) Measurement period:20 March, 2011 10 ： 00-22 March,2011 9:54 Measurement period:22 March, 2011 10 ： 00-23 March,2011 11:10 Air collected:1724 cubic meter Air collected:906 cubic meter CONC.(Bq/cm 3 ) CONC.(Bq/cm 3 ) Nuclide Nuclide 2.3 × 10 -5 9.6 × 10 -6 Iodine131 Iodine131 4.6 × 10 -6 5.7 × 10 -7 Tellurium132 Tellurium132 7.3 × 10 -6 1.2 × 10 -7 Caesium134 Caesium134 Caesium136 8.7 × 10 -7 Caesium136 1.1 × 10 -8 7.0 × 10 -6 1.2 × 10 -7 Caesium137 Caesium137 3.2 × 10 -6 4.9 × 10 -7 Tellurium129m Tellurium129m 7.2 × 10 -9 Iodine133 Iodine133 no detection Technetium99m *1 4.6 × 10 -7 Technetium99m *1 5.3 × 10 -8 2011 年 3 月 20 - 22 日 2011 年 3 月 22 - 23 日 5

3 月 23 – 24 日 3 月 24 – 25 日 Chart2 Result of 10th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Chart1 Result of 9th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Measurement period:24 March, 2011 11:15 - 25 March,2011 10:43 Measurement period:23 March, 2011 11:20 - 24 March,2011 11:02 Air collected:853 cubic meter Air collected:845 cubic meter Nuclide CONC (Bq/cm 3 ) Nuclide CONC (Bq/cm 3 ) 1.9 × 10 -6 7.3 × 10 -7 Iodine131 Iodine131 9.7 × 10 -9 3.2 × 10 -9 Tellurium132 Tellurium132 1.7 × 10 -8 5.0 × 10 -9 Caesium134 Caesium134 2.1 × 10 -9 Caesium136 Caesium136 no detection 1.7 × 10 -8 5.2 × 10 -9 Caesium137 Caesium137 Tellurium129m no detection Tellurium129m no detection Iodine133 no detection Iodine133 no detection 4.5 × 10 -9 Technetium99m *2 Technetium99m no detection 2011 年 3 月 23 - 24 日 2011 年 3 月 24 - 25 日 3 月 25 – 26 日 3 月 26 – 27 日 Chart1 Result of 11th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Chart2 Result of 12th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Measurement period:25 March, 2011 10:58 - 26 March, 2011 10:22 Measurement period:26 March, 2011 10:29 - 27 March, 2011 11:03 Air collected:844 cubic meter Air collected:884 cubic meter CONC (Bq/cm 3 ) CONC (Bq/cm 3 ) Nuclide Nuclide 5.7 × 10 -7 1.1 × 10 -7 Iodine131 Iodine131 3.1 × 10 -9 6.6 × 10 -10 Tellurium132 Tellurium132 9.3 × 10 -9 1.6 × 10 -9 Caesium134 Caesium134 Caesium136 no detection Caesium136 no detection 10.0 × 10 -9 1.6 × 10 -9 Caesium137 Caesium137 Tellurium129m no detection Tellurium129m no detection Iodine133 no detection Iodine133 no detection Technetium99m no detection Technetium99m no detection 2011 年 3 月 25 - 26 日 2011 年 3 月 26 - 27 日 6

3 月 27 – 28 日 3 月 28 – 30 日 Chart3 Result of 13th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Chart4 Result of 14th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Measurement period:27 March, 2011 11:23 - 28 March, 2011 10:48 Measurement period:28 March, 2011 10:59 - 30 March, 2011 10:10 Air collected:850 cubic meter Air collected:1698 cubic meter Nuclide CONC (Bq/cm 3 ) Nuclide CONC (Bq/cm 3 ) 1.0 × 10 -7 5.7 × 10 -7 Iodine131 Iodine131 3.9 × 10 -10 1.7 × 10 -8 Tellurium132 Tellurium132 6.3 × 10 -10 2.5 × 10 -7 Caesium134 Caesium134 1.2 × 10 -8 Caesium136 no detection Caesium136 5.2 × 10 -10 2.3 × 10 -7 Caesium137 Caesium137 5.3 × 10 -8 Tellurium129m no detection Tellurium129m Iodine133 no detection Iodine133 no detection 1.2 × 10 -8 Technetium99m no detection Technetium99m 2011 年 3 月 27 - 28 日 2011 年 3 月 28 - 30 日 Technetium99m is a daughter nuclide of molybdenum-99, are in the transient equilibrium. Gamma rays from other nuclei, Barium-140 and Lanthanum-140 are also observed. 3 月 30 日 -4 月 1 日 Chart5 Result of 15th measurement: Detected nuclide and its concentration (Bq/cm 3 ) Measurement period:30 March, 2011 10:17 - 1 April, 2011 10:10 Air collected:1723 cubic meter Nuclide CONC (Bq/cm 3 ) 2.2 × 10 -7 Iodine131 6.9 × 10 -9 Tellurium132 1.3 × 10 -7 Caesium134 6.1 × 10 -9 Caesium136 1.2 × 10 -7 Caesium137 Tellurium129 3.3 × 10 -8 m Iodine133 no detection Technetium99 7.7 × 10 -9 m 2011 年 3 月 30 – 4 月 1 日 Technetium99m is a daughter nuclide of molybdenum-99, are in the transient equilibrium. Gamma rays from other nuclei, Barium-140 and Lanthanum-140 are also observed. 7