tempreture on reactoc 4,5,and 6# Stock
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apanese Earthquake Update (16 March 22:00 UTC)
Temperature of Spent Fuel Pools at Fukushima Daiichi Nuclear Power Plant
Spent fuel that has been removed from a nuclear reactor generates intense
heat and is typically stored in a water-filled spent fuel pool to cool it
and provide protection from its radioactivity. Water in a spent fuel pool is
continuously cooled to remove heat produced by spent fuel assemblies.
According to IAEA experts, a typical spent fuel pool temperature is kept
below 25 ˚C under normal operating conditions. The temperature of a
spent fuel pool is maintained by constant cooling, which requires a constant
power source.
Given the intense heat and radiation that spent fuel assemblies can generate
, spent fuel pools must be constantly checked for water level and
temperature. If fuel is no longer covered by water or temperatures reach a
boiling point, fuel can become exposed and create a risk of radioactive
release. The concern about the spent fuel pools at Fukushima Daiichi is that
sources of power to cool the pools may have been compromised.
The IAEA can confirm the following information regarding the temperatures of
the spent nuclear fuel pools at Units 4, 5 and 6 at Fukushima Daiichi
nuclear power plant:
Unit 4
14 March, 10:08 UTC: 84 ˚C
15 March, 10:00 UTC: 84 ˚C
16 March, 05:00 UTC: no data
Unit 5
14 March, 10:08 UTC: 59.7 ˚C
15 March, 10:00 UTC: 60.4 ˚C
16 March, 05:00 UTC: 62.7 ˚C
Unit 6
14 March, 10:08 UTC: 58.0 ˚C
15 March, 10:00 UTC: 58.5 ˚C
16 March, 05:00 UTC: 60.0 ˚C
Temperature of Spent Fuel Pools at Fukushima Daiichi Nuclear Power Plant
Spent fuel that has been removed from a nuclear reactor generates intense
heat and is typically stored in a water-filled spent fuel pool to cool it
and provide protection from its radioactivity. Water in a spent fuel pool is
continuously cooled to remove heat produced by spent fuel assemblies.
According to IAEA experts, a typical spent fuel pool temperature is kept
below 25 ˚C under normal operating conditions. The temperature of a
spent fuel pool is maintained by constant cooling, which requires a constant
power source.
Given the intense heat and radiation that spent fuel assemblies can generate
, spent fuel pools must be constantly checked for water level and
temperature. If fuel is no longer covered by water or temperatures reach a
boiling point, fuel can become exposed and create a risk of radioactive
release. The concern about the spent fuel pools at Fukushima Daiichi is that
sources of power to cool the pools may have been compromised.
The IAEA can confirm the following information regarding the temperatures of
the spent nuclear fuel pools at Units 4, 5 and 6 at Fukushima Daiichi
nuclear power plant:
Unit 4
14 March, 10:08 UTC: 84 ˚C
15 March, 10:00 UTC: 84 ˚C
16 March, 05:00 UTC: no data
Unit 5
14 March, 10:08 UTC: 59.7 ˚C
15 March, 10:00 UTC: 60.4 ˚C
16 March, 05:00 UTC: 62.7 ˚C
Unit 6
14 March, 10:08 UTC: 58.0 ˚C
15 March, 10:00 UTC: 58.5 ˚C
16 March, 05:00 UTC: 60.0 ˚C
