Radiation Dose measured at exhaust stack monitor of Fukushima Daiichi Nuclear Power Station

○Information

○Measurement value list ： 2026/08/20(CSV Download)

Stack Unit：cps　Wind Velocity Unit：m/s

※"-": the wind velocity is below 0.5m/s

Time	Unit 5,6 joint stack	Wind Direction	Wind Velocity
00:00	3.5	south	5.1
00:10	3.4	south	5.8
00:20	3.5	south	5.4
00:30	3.5	south	5.3
00:40	3.5	south	5.0
00:50	3.5	south	4.9
01:00	3.5	south-southwest	5.0
01:10	3.6	south-southwest	4.4
01:20	3.5	south-southwest	4.3
01:30	3.7	south-southwest	4.9
01:40	3.5	south-southwest	4.1
01:50	3.5	south-southwest	4.6
02:00	3.5	south-southwest	3.5
02:10	3.5	south	3.7
02:20	3.6	south-southwest	4.1
02:30	3.6	south-southwest	4.3
02:40	3.5	south-southwest	4.9
02:50	3.5	south-southwest	5.2
03:00	3.5	south	4.0
03:10	3.5	south-southwest	3.9
03:20	3.6	south-southwest	3.5
03:30	3.5	south-southwest	3.0
03:40	3.6	southwest	2.2
03:50	3.5	west-southwest	2.1
04:00	3.5	north	1.5
04:10	3.4	northeast	1.4
04:20	3.7	-	CALM
04:30	3.5	east	0.8
04:40	3.6	north-northeast	1.1
04:50	3.7	north	0.7
05:00	3.5	-	CALM
05:10	3.6	east-northeast	0.6
05:20	3.4	-	CALM
05:30	3.6	east	1.1
05:40	3.5	-	CALM
05:50	3.6	-	CALM
06:00	3.6	west-southwest	0.9
06:10	3.8	south	0.8
06:20	3.6	south	1.0
06:30	3.5	south-southwest	0.9
06:40	3.6	southwest	0.7
06:50	3.7	south	1.3
07:00	3.7	south-southwest	0.9
07:10	3.6	south-southwest	1.0
07:20	3.6	south	0.9
07:30	3.6	-	CALM
07:40	3.6	-	CALM
07:50	3.4	east-northeast	0.8
08:00	3.7	-	CALM
08:10	3.5	east-northeast	1.5
08:20	3.7	east-northeast	1.7
08:30	3.5	east	1.6
08:40	3.5	east-southeast	1.6
08:50	3.4	east-southeast	1.9
09:00	3.6	east-southeast	2.2
09:10	3.6	east-southeast	3.0
09:20	3.6	southeast	3.2
09:30	3.4	southeast	4.2
09:40	3.6	south-southeast	3.8
09:50	3.5	south-southeast	3.8
10:00	3.6	southeast	3.3
10:10	3.6	southeast	2.8
10:20	3.6	south-southeast	3.6
10:30	3.6	south-southeast	3.5
10:40	3.6	south-southeast	3.9
10:50	3.4	south-southeast	3.6
11:00	3.3	south-southeast	3.1
11:10	3.5	south-southeast	4.6
11:20	3.5	south	3.9
11:30	3.6	south-southeast	4.6
11:40	3.6	south-southeast	4.1
11:50	3.5	south-southeast	4.5
12:00	3.5	south-southeast	3.8
12:10	3.7	south	5.1
12:20	3.4	south-southeast	4.1
12:30	3.5	south-southeast	5.8
12:40	3.5	south-southeast	4.4
12:50	3.5	south-southeast	4.4
13:00	3.5	south-southeast	6.0
13:10	3.5	south-southeast	6.6
13:20	3.6	south-southeast	5.3
13:30	3.4	south-southeast	2.3
13:40	3.5	south	2.8
13:50	3.5	west-southwest	2.1
14:00	3.4	west-northwest	2.6
14:10	3.5	west-southwest	3.9
14:20	3.6	west-southwest	3.9
14:30	3.6	west-southwest	3.6
14:40	3.4	southwest	4.3
14:50	3.6	southwest	3.2
15:00	3.5	southwest	3.0
15:10	3.5	west-southwest	3.0
15:20	3.5	west-southwest	3.4
15:30	3.5	west-southwest	3.8
15:40	3.7	south-southwest	3.5
15:50	3.4	south-southwest	3.4
16:00	3.5	south-southwest	4.2
16:10	3.6	south-southwest	3.9
16:20	3.5	south	3.3
16:30	3.5	south	3.3
16:40	3.5	south	3.3
16:50	3.6	south-southwest	3.1
17:00	3.6	south-southwest	4.4
17:10	3.6	southwest	3.0
17:20	3.6	west-southwest	2.2
17:30	3.6	south-southwest	1.4
17:40	3.5	south-southwest	1.4
17:50	3.5	southwest	1.8
18:00	3.4	west-southwest	1.4
18:10	3.5	west-southwest	2.5
18:20	3.4	west-southwest	2.3
18:30	3.4	west-southwest	2.6
18:40	3.5	southwest	2.2
18:50	3.5	southwest	3.2
19:00	3.7	west-southwest	2.3
19:10	3.6	southwest	1.8
19:20	3.7	southwest	1.2
19:30	3.4	southwest	1.6
19:40	3.5	south-southwest	0.8
19:50	3.7	south-southwest	1.3
20:00	3.6	south-southwest	1.3
20:10	3.3	south-southwest	0.9
20:20	3.6	south	0.8
20:30	3.5	east	0.7
20:40	3.7	southeast	0.9
20:50	3.5	-	CALM
21:00	3.7	-	CALM
21:10	3.6	north-northeast	0.9
21:20	3.5	-	CALM
21:30	3.5	-	CALM
21:40	3.5	west-northwest	0.8
21:50	3.6	-	CALM
22:00	3.7	-	CALM
22:10	3.5	north-northeast	0.6
22:20	3.5	south	0.7
22:30	3.6	west-southwest	1.6
22:40	3.6	southwest	0.9
22:50	3.6	south-southwest	1.6
23:00	3.5	southwest	2.4
23:10	3.6	southwest	2.8
23:20	3.5	south-southwest	3.3
23:30	3.4	south-southwest	2.7
23:40	3.6	south-southwest	2.3
23:50	3.6	southwest	1.5