Temperatures measured at the bottom of the Unit 3 Reactor Pressure Vessel at Fukushima Daiichi Nuclear Power Station

Here are the measurement results of temperatures at the bottom of the Unit 3 Reactor Pressure Vessel at Fukushima Daiichi Nuclear Power Station.

Monitoring points

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Here are the measurement points for each temperature.
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For reference: The following is the “Limiting Conditions of Operations” designated in the implementation plan for temperatures
at the bottom of the Reactor Pressure Vessel:
　　　・Temperature at the bottom of the Reactor Pressure Vessel: Within 80℃

On March 26, 2021, temperatures at 3 points (TE-2-3-69L1, TE-2-3-69L2 and TE-2-3-69L3) in the Bottom Head section of the Unit 3 Reactor Pressure Vessel (RPV) were excluded from planned data monitoring. Accordingly, “Temperature measurement points (Figure)” have been updated.
Data may change or be missing due to equipment failure or regular inspections.
Temperature may change due to change of water injection flow rate to the reactor.
Instrument equipment is removed, installed or inspected for regular inspections at Unit 1 - 4.
During the work period, the indicated value will fluctuate or be absent, but the equipment will return to a measureable state at a defined time.

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Temperatures measured at the bottom of the Unit 3 Reactor Pressure Vessel at Fukushima Daiichi Nuclear Power Station