Revised Readings of the Third Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (Definite Values) May 21, 2012 Local Nuclear Emergency Response Headquarters (Radioactivity Team) Disaster Provision Main Office of Fukushima Pref. (Nuclear Power Team) The results of air dose rate monitoring based on “The Third Fukushima Prefecture Environmental Radioactivity Monitoring in Mesh Survey Action Plan,” issued on February 20, 2012, are as follows. 1 Monitoring Outline (1) Monitoring Date From Tuesday, February 21 to Friday, March 9, 2012 (2) Number of Monitoring Locations 2,675 locations (Locations monitored in the previous survey: 2,776) 2 Monitoring Results (1) Monitoring Results for this Report (Unit: μSv/h) Readings Readings Monitoring in the in the Segment Maximum value Minimum value locations second first survey survey 2.8 0.06 Date City/Ryozen Town Fukushima City/ 0.13 0.16 Kenpoku 379 Kamioguni Chabatake Tsuchiyuonsen Town Inokura to to (Reading in the previous Near the entrance of Skyline 4.3 4.4 survey of this location:3.0) Prefectural Road 30 1.0 Koriyama City/Daishin 2-chome (Reading in the previous survey of this location:1.0) 0.05 0.08 0.12 Kenchu 914 Miharu Town/Tomizawa Koriyama City/Banyushinden to to Sekita Ienomae 1.4 2.6 Near the starting point of Prefectural Road 119 (Reading in the previous survey of this location:1.1) 0.67 Shirakawa City/ 0.07 0.10 0.12 Kennan 277 Taishinkumado Kaketsuka Yamatsuri Town/Kamiseki to to (Reading in the previous Godo 1.2 1.8 survey of this location:1.2) 0.30 Aizumisato Town/Shimohori 0.03 0.07 0.09 Aizu 414 Irimameda Inawashiro Town/Kogai to to (Reading in the previous Muranishi 0.36 0.88 survey of this location:0.20) 0.04 Shimogo Town/ Ouchi Near Yamamoto Shimogo Town/Ouchi Near Gongengami Shimogo Town/Ouchi Along Prefectural Road 329 Shimogo Town/Omatsukawa Shimogo Town/Ochiai Near Kamishitakawara Shimogo Town/Nagurasawa Near Koshi Tunnel Shimogo Town/Nagurasawa 0.12 Along Route 289 Minamiaizu Town/Near 0.06 0.04 Shimogo Town/Minamiochiai Minamiaizu 150 Izumita Gakema to to Shimogo Town/Nogiwashinden (Reading in the previous 0.17 0.20 Kannonnuma Forest Park survey of this location:0.17) Shimogo Town/Otokane Near Jumonji Shimogo Town/Otokane Near Tanome Minamiaizu Town/Tabe Near Hachimanmae Minamiaizu Town/Tajima Near Otsubo Minamiaizu Town/Nagata Near Biwanokage Minamiaizu Town/Mizunashi Near Tamuzawa Minamiaizu Town/Tonyu Near Shimokoshu 3.4 Minamisoma City/ Haramachi Ward Takanokura 0.08 0.11 0.18 Sousou 193 Near Yamakami Ohashi Soma City/Kitaebi to to Bridge Near Minatoguchi 5.2 6.8 (Reading in the previous survey of this location: 4.5) 1.8 Iwaki City/Kawamae 0.07 0.07 0.14 Shimookeuri Iwaki 348 Iwaki City/Iwama Town to to Near Hagi Tsukahara 3.4 2.8 (Reading in the previous survey of this location:2.6) 3.4 Minamisoma City/ Haramachi Ward Takanokura 0.03 0.06 0.04 Total 2,675 Near Yamakami Ohashi Inawashiro Town/Kogai to to Bridge Muranishi 5.2 6.8 (Reading in the previous survey of this location: 4.5) * Monitoring was conducted at the height of 1m above the ground. * “Readings in the first survey” exclude the data concerning the planned evacuation zones, where monitoring was not conducted in this survey, contained in the readings in Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey published May 2, 2011 (conducted April 12 to 16, 2011). * “Readings in the second survey” are the readings in Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey published November 29, 2011 (conducted August 17 to September 7, 2011). * The number of monitoring locations in this survey (2,675 locations) excludes 96 locations at which measurements could not been conducted due to fallen snow, etc. and 5 locations that overlap with those among the 2,776 monitored locations in the previous survey. (2) Surrounding Conditions and Current State of Major Monitoring Locations Locations with an air dose rate of 3.0μSv/h or Implementation status Setting up of more of detailed survey in specific spots Conditions of monitoring living areas Monitoring Readings recommended Segment surrounding locations (μSv/h) for evacuation monitoring locations Minami Soma City 3.1 - Mountain area near Haramachi Ward Takanokura Dam (Previous value Set Takanokura/Near - There are houses in the Shirigake 3.6) area Minami Soma City 3.0 - Mountain area near Conducted the Haramachi Ward Takanokura Dam detailed monitoring Sousou (Previous value Set Takanokura/Near - There are no houses in the on roads and residences in June Higashikunimi 4.9) area and July. Minami Soma City 3.4 - Mountain area near Haramachi Ward Takanokura Dam Takanokura/Near (Previous value Set - There are no houses in the Yamakami area Ohashi Bridge 4.5) (3) Comparison with the Previous Survey (conducted in August to September 2011) ① Comparison by segment (Unit of the greatest amount of change: μSv/h) Increased Decreased Unchanged Total Segment No. of Greatest Greatest Greatest No. of No. of locations amount of amount of amount of locations locations change change change Kenpoku 11(3%) 0.35 361(95%) -2.63 7(2%) 379 Kenchu 64(7%) 0.18 806(88%) -0.87 44(5%) 914 Kennan 8(3%) 0.04 253(91%) -0.53 16(6%) 277 Aizu 3(1%) 0.10 411(99%) -0.24 0(0%) 414 Minamiaizu 1(1%) 0.01 132(88%) -0.09 17(11%) 150 Sousou 5(2%) 0.10 187(97%) -1.90 1(1%) 193 Iwaki 28(8%) 0.04 298(86%) -0.81 22(6%) 348 Total 120(4%) 2,448(92%) 107(4%) 2,675 ② Comparison by the presence or absence of fallen snow Increased Decreased Unchanged Total Locations with fallen 8(1.4%) 566(96.1%) 15(2.5%) 589 snow Locations without 112(5.4%) 1,882(90.2%) 92(4.4%) 2,086 fallen snow Total 120(4.5%) 2,448(91.5%) 107(4.0%) 2,675 Air dose rates in Fukushima Prefecture are on a declining trend as a whole, in comparison to those in the previous survey. However, the air dose rates in some locations have been increasing. The rate of decrease in air dose rates at the locations where fallen snow was higher, and the greatest amount of change in decrease was seen at locations where the surface of the road was completely covered by fallen snow. Environmental radiation monitoring will be conducted in the future to grasp the dose rate status. (Inquiries: Monitoring Team, Radioactivity Team Tel: 024-521-1917) Readings of the First Fukushima Prefecture Environmental Radiation Monitoring in Mesh Surve eadings of the Second Fukushima Prefecture Environmental Radiation Monitoring in Mesh Surv Readings of the Third Fukushima Prefecture Environmental Radiation Monitoring in Mesh Surve Readings of the Third Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (only for the locations with fallen snow * The second and third surveys were not conducted in restricted areas or the planned evacuation areas set on April 22, 2011, so such areas have been left blank. Attachment Readings of the Third Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (Definite Values) (Reference) (Reference) Readings (unit: μSv/h) Fallen Snow World Geodetic System World Geodetic System Date of (height measurement: 1m) No. Municipality Monitoring Locations Remarks (sexagesimal scale) (sexagesimal scale) Survey Second survey First survey This survey (Aug.-Sep. (cm) Latitude (North Lattitude) Longtitude (East Longtitude) 2011) (Apr. 2012) Fukushima Iizaka Town Moniwa 1 37° 55′ 55.79″ 140° 24′ 25.78″ February 21 0.08 0.13 0.25 - Near Dai-Fukaya Tunnel City Shitagama Fukushima Iizaka Town Moniwa 2 37° 54′ 53.80″ 140° 25′ 33.78″ February 21 0.07 0.13 0.24 3 Near Moniwa Post Offce City Kurosawa Fukushima Iizaka Town Moniwa 3 37° 54′ 15.30″ 140° 25′ 53.28″ February 21 0.10 0.20 0.34 10 Near Mitake Shrine City Namekawa Fukushima Iizaka Town Moniwa 4 37° 53′ 57.54″ 140° 25′ 51.33″ February 21 0.11 0.27 0.56 - Near Moniwa Namedaki camp site City Tonishi Along Prefectural Road 399 Near Fukushima Iizaka Town Moniwa 5 37° 53′ 41.91″ 140° 25′ 57.48″ February 21 0.13 0.22 - - the sign of the entrance of Kawahara City Shimotakino Camp Site Fukushima Iizaka Town Yuno Near the entrance of Atagoyama 6 37° 50′ 00.33″ 140° 27′ 18.58″ February 21 0.44 0.55 0.92 - City Atagomae Park Near the intersection of Route 399 Fukushima Iizaka Town Yuno 7 37° 50′ 41.93″ 140° 26′ 14.59″ February 21 0.27 0.41 0.83 - and Prefectural Road 319 Anabara City Kakumashita Totsuna Line Fukushima Iizaka Town Nakano 8 37° 50′ 22.32″ 140° 22′ 13.71″ February 21 0.13 0.24 0.52 - Near Yamagami Bridge City Hishinuma Fukushima Iizaka Town Nakano Passing bay at the exit of Takahira 9 37° 50′ 13.63″ 140° 22′ 46.91″ February 21 0.23 0.34 0.74 - City Kitaenbu Tunnel Fukushima Iizaka Town Nakano Near the entrance of Nakano Dai-ni 10 37° 50′ 29.52″ 140° 21′ 44.19″ February 21 0.16 0.30 0.56 - City Hishinuma Tunnel Fukushima Iizaka Town Higashiyuno Along Prefectural Road 124 Near 11 37° 49′ 46.83″ 140° 28′ 38.86″ February 24 0.27 0.45 0.72 - City Kashiwazaki the grave posts at Fukuhara Shrine Fukushima Iizaka Town Nakano 12 37° 49′ 44.93″ 140° 26′ 40.69″ February 21 0.50 0.54 1.1 - Near the entrance of Iizaka Tunnel City Onigoshi Fukushima Iizaka Town Nakano Near the intersection of Route 13 13 37° 49′ 47.13″ 140° 24′ 04.60″ February 21 0.38 0.74 1.1 - City Senuma and Prefectural Road 312 Fukushima Iizaka Town Nakano Nea rthe bus parking lot of 14 37° 49′ 28.63″ 140° 24′ 49.00″ February 21 0.30 0.42 0.95 - City Numase Sekishita Nakanofudoson Fukushima 15 Okidaka Takanashi 37° 48′ 20.94″ 140° 27′ 58.68″ February 24 0.55 0.67 1.4 - Near Kifune Shrine City Fukushima Iizaka Town Hirano Near the parking lot in front of 16 37°