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

○Information

○Measurement value list ： 2026/05/20(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	3.7	east-northeast	0.7
00:10	3.5	northeast	2.0
00:20	3.5	north-northeast	2.1
00:30	3.7	north-northeast	1.7
00:40	3.6	north-northeast	2.2
00:50	3.6	north	2.5
01:00	3.6	north	2.6
01:10	3.5	north	3.7
01:20	3.7	north-northwest	4.8
01:30	3.7	north-northwest	5.5
01:40	3.7	north-northwest	3.2
01:50	3.5	north	2.0
02:00	3.6	north	1.5
02:10	3.5	north-northwest	2.4
02:20	3.5	north-northwest	3.3
02:30	3.7	north-northwest	3.9
02:40	3.6	north-northwest	3.6
02:50	3.5	north-northwest	3.2
03:00	3.7	north-northwest	2.6
03:10	3.6	north-northwest	2.7
03:20	3.6	north-northwest	3.0
03:30	3.6	north	3.4
03:40	3.6	north-northwest	2.3
03:50	3.5	north	1.7
04:00	3.7	north	1.4
04:10	3.7	north-northeast	1.0
04:20	3.7	north-northeast	1.2
04:30	3.7	north-northeast	0.9
04:40	3.6	north	0.8
04:50	3.7	-	CALM
05:00	3.6	northwest	0.6
05:10	3.7	west-northwest	0.7
05:20	3.6	-	-
05:30	3.6	south-southwest	1.3
05:40	3.6	south-southwest	2.0
05:50	3.6	south-southwest	2.0
06:00	3.5	southwest	1.6
06:10	3.6	south	1.1
06:20	3.5	south-southwest	1.1
06:30	3.7	-	CALM
06:40	3.7	south-southeast	0.8
06:50	3.6	south	1.6
07:00	3.6	south	2.8
07:10	3.5	south-southeast	1.9
07:20	3.6	south-southeast	2.2
07:30	3.6	south-southeast	2.8
07:40	3.8	south-southeast	2.6
07:50	3.5	south-southeast	1.9
08:00	3.5	south-southeast	2.0
08:10	3.7	south	2.4
08:20	3.5	south-southeast	3.3
08:30	3.6	southeast	2.5
08:40	3.4	southeast	2.8
08:50	3.6	south-southeast	2.0
09:00	3.7	south-southeast	1.9
09:10	3.6	southeast	2.2
09:20	3.6	southeast	2.2
09:30	3.5	southeast	2.1
09:40	3.6	southeast	1.8
09:50	3.5	east-southeast	1.8
10:00	3.5	east-southeast	1.5
10:10	3.5	east	2.5
10:20	3.5	east-southeast	2.4
10:30	3.4	east-southeast	2.8
10:40	3.6	east-southeast	2.9
10:50	3.6	east-southeast	2.8
11:00	3.6	east-southeast	2.6
11:10	3.6	east-southeast	2.9
11:20	3.7	east-southeast	2.6
11:30	3.6	southeast	2.4
11:40	3.7	east	2.7
11:50	3.6	southeast	2.7
12:00	3.6	east-southeast	2.7
12:10	3.6	southeast	3.0
12:20	3.6	southeast	2.9
12:30	3.6	east-southeast	3.1
12:40	3.6	east-southeast	3.3
12:50	3.5	east-southeast	2.5
13:00	3.7	east-southeast	3.7
13:10	3.7	east-southeast	2.9
13:20	3.7	southeast	3.3
13:30	3.5	southeast	3.0
13:40	3.4	southeast	3.2
13:50	3.5	south-southeast	3.3
14:00	3.7	southeast	3.0
14:10	3.5	southeast	2.9
14:20	3.5	southeast	2.6
14:30	3.6	southeast	2.7
14:40	3.5	southeast	3.4
14:50	3.7	southeast	2.8
15:00	3.6	south-southeast	3.2
15:10	3.8	southeast	2.8
15:20	3.6	south-southeast	2.5
15:30	3.6	south-southeast	2.6
15:40	3.5	south-southeast	2.4
15:50	3.5	south-southeast	2.2
16:00	3.6	south-southeast	2.4
16:10	3.5	south-southeast	2.6
16:20	3.6	south-southeast	2.6
16:30	3.6	south-southeast	2.4
16:40	3.6	south-southeast	2.6
16:50	3.6	south-southeast	3.1
17:00	3.6	south-southeast	3.6
17:10	3.6	south-southeast	3.3
17:20	3.5	south-southeast	2.9
17:30	3.6	south-southeast	2.4
17:40	3.6	south-southeast	3.1
17:50	3.6	south	2.5
18:00	3.6	south	2.3
18:10	3.5	south-southeast	2.8
18:20	3.5	south-southeast	1.7
18:30	3.5	south	1.0
18:40	3.5	south-southwest	0.8
18:50	3.5	south-southwest	1.8
19:00	3.5	south-southwest	1.0
19:10	3.6	southwest	0.6
19:20	3.6	south	1.2
19:30	3.6	south-southwest	0.8
19:40	3.5	-	CALM
19:50	3.8	-	CALM
20:00	3.6	west-southwest	1.6
20:10	3.5	southwest	0.8
20:20	3.7	-	CALM
20:30	3.8	southwest	1.2
20:40	3.7	south-southwest	1.1
20:50	3.5	-	CALM
21:00	3.8	west	1.2
21:10	3.7	south-southeast	1.8
21:20	3.6	south	1.9
21:30	3.4	southwest	1.3
21:40	3.6	southwest	1.4
21:50	3.6	north	1.2
22:00	3.5	north-northeast	0.6
22:10	3.6	east	1.5
22:20	3.7	east-northeast	1.3
22:30	3.5	-	CALM
22:40	3.6	northwest	0.8
22:50	3.6	west-northwest	1.2
23:00	3.6	northwest	0.8
23:10	3.6	north-northwest	1.0
23:20	3.5	northwest	1.0
23:30	3.6	north-northwest	1.0
23:40	3.6	north-northwest	1.2
23:50	3.7	northwest	1.2