Unit 3 Spent Fuel Removal: Second half of FY2017
Unit 3 Reactor Fuel Removal: First half of FY2020
Unit 3 July 2014 (METI)
Containment Structure
1. approx.34m
2. approx.11m
3. approx.20m
4. approx.9m
5. approx.2m
6. approx.17-34mm
Carbon steel liner
Reactor Vessel
1. approx.21m
2. approx.5.5m
3. approx.14cm
4, approx.18.4m
Carbon steel (with stainless steel lining)
Weight of UO2: 107t
Temperature at the bottom of RPV: latest data
Temperature in PCV: latest data
Temperature in reactor building As of 11/14, 2013: 14.1℃ (reference) Outdoor air temperature 12.0℃
Temperature of accumulated water in torus room: Unidentified
Humidity in PCV: Unidentified
Humidity in RPV: Unidentified
Flow rate of nitrogen injection: latest here
Hydrogen concentration in PCV: latest here
Pressure in PCV: latest here
Dose rate in PCV: Unidentified
Dose rate in RPV: Unidentified
Dose rate in the building: Most recent survey 2013
Dose rate in torus room: 100-360mSv/h (As of 7.11,2012)
Radioactive concentration: latest here
Water level of accumulated water in PCV: Estimated to be approx. 6.5m from bottom part (As of 5,2014)
Water level of accumulated water in torus room: OP3370mm (As of 6.6,2012)
Water level of accumulated water in triangle corner: OP3150 (As of 6.6,2012)
Mass of fuel debris: Unidentified
Distribution of fuel debris (assumption): Existing the core part, lower plenum and PCV, but the ratio among those locations is unknown
Fuel debris MCCI products: Unidentified
Fuel debris dose rate: Unidentified
Fuel debris hardness: Unidentified
Fuel debris density: Unidentified (experiments to estimate fuel debris density here)
Weight ratio of fuel debris remaining in RPV: TEPCO 37% JAEA 36%
Percentage of fuel debris not in the RPV: TEPCO 63% JAEA 64%
Diagram of reactor vessel internal structures along with weights and dimensions located here: reactor_internals_id09_e.
IRID cites the current nitrogen injection system as the starting point for plans to be developed to manage hydrogen gasses during decommissioning and fuel debris retrieval.
Resources:
http://en.dccc-program.jp/files/20140708_1-E.pdf
http://irid.or.jp/fd/?page_id=237
http://dccc-program.jp/files/20140711/en/pdf/id19_e.pdf
http://dccc-program.jp/files/20140711/en/pdf/id09_e.pdf
http://dccc-program.jp/files/20140711/en/pdf/id15_e.pdf