| Items | Unit 1 | Unit 2 | Unit 3 | |||
|---|---|---|---|---|---|---|
| uel debris retrieval (the earliest case) |
1st half of FY2020 | 1st half of FY2020 | 2nd half of FY2021 | |||
| Plant data |
Size etc. |
Reactor Building |
Image |  |
||
| (1) | approx.40m | approx.46m | approx.46m | |||
| (2) | approx.45m | approx.46m | approx.46m | |||
| (3) | approx.0.5-1.5m | approx.0.5-1.5m | approx.0.5-1.5m | |||
| Material | Ferroconcrete | Ferroconcrete | Ferroconcrete | |||
| PCV | Image |  |
||||
| (1) | approx.32m | approx.34m | approx.34m | |||
| (2) | approx.10m | approx.11m | approx.11m | |||
| (3) | approx.18m | approx.20m | approx.20m | |||
| (4) | approx.8m | approx.9m | approx.9m | |||
| (5) | approx.2m | approx.2m | approx.2m | |||
| (6) | min.15mm | approx.17-34mm | approx.17-34mm | |||
| Material | Carbon steel | Carbon steel | Carbon steel | |||
| RPV | Image |  |
||||
| (1) | approx.19m | approx.21m | approx.21m | |||
| (2) | approx.4.8m | approx.5.5m | approx.5.5m | |||
| (3) | approx.16cm | approx.14cm | approx.14cm | |||
| (4) | approx.18.4m | approx.18.4m | approx.18.4m | |||
| Material | Carbon steel (with stainless steel lining) |
Carbon steel (with stainless steel lining) |
Carbon steel (with stainless steel lining) |
|||
| Weight of UO2 | 77t | 107t | 107t | |||
| Tempe -rature |
Temperature at the bottom of RPV As of 6/25, 2014 （to latest data） |
25.4℃ (VESSEL BOTTOM HEAD) |
33.9℃ (VESSEL WALL ABOVE BOTTOM HEAD) |
32.1℃ (VESSEL BOTTOM HEAD) |
||
| Temperature in PCV As of 6/25, 2014 （to latest data） |
25.6℃ (HVH-12A RETURN AIR) |
34.1℃ (RETURN AIR DRYWELL COOLER) |
30.8℃ (RETURN AIR DRYWELL COOLER) |
|||
| Temperature in reactor building As of 11/14, 2013 |
13.3℃ (reference) Outdoor air temperature 12.0℃ |
21.1℃ (around south east corner on 1st floor) (reference) Outdoor air temperature 12.0℃ |
14.1℃ (reference) Outdoor air temperature 12.0℃ |
|||
| Temperature of accumlated water in torus room |
4.8-22.8℃ (As of 2/20,2013) |
16.3-25.2℃ (As of 4.12,2013) |
Unidentified | |||
| Temperature of accumlated water in triangle courner |
32.4-32.6℃ (As of 9.20,2012) |
30.2-32.1℃ (As of 6.28,2012) |
Unidentified | |||
| Humi -dity |
Humidity in PCV | 100%(the form of a mist as of 10,2012) | 100％(dripping as of 7,2013) | Unidentified | ||
| Humidity in RPV | Unidentified | Unidentified | Unidentified | |||
| Air | Flow rate of nitrogen injection （to latest data） |
PCV:27.73Nm3/h PCV: – Nm3/h (Shutdown) |
PCV:15.40Nm3/h PCV: – Nm3/h (Shutdown) |
PCV:16.40Nm3/h PCV: – Nm3/h (Shutdown) |
||
| Hydrogen concentration in PCV （to latest data） |
System A： 0.01vol% | System A： 0.05vol% | System A： 0.05vol% | |||
| pressure | Pressure in PCV As of 6/25, 2014 （to latest data） |
3.9kPa g | 5.18kPa g | 0.23kPa g | ||
| Dose rate |
Dose rate in PCV | approx. 11.1Sv/h (As of 10.10,2012) |
approx. 72.9Sv/h (As of 3.27,2012) |
Unidentified | ||
| Dose rate inRPV | Unidentified | Unidentified | Unidentified | |||
| Dose rate in the building | Please refer from the survey map for air dose rate in the buildings →Survey map | |||||
| Dose rate in torus room | 200-2400mSv/h (As of 5.30,2013) |
4.3-137mSv/h (As of 4.12,2013) |
100-360mSv/h (As of 7.11,2012) |
|||
| Radio -active concent -ration |
Radioactive concentration in PCV (Xe135) (Bq/cm3) As of 6/25, 2014 （to latest data） |
System A： 1.58E-03 Measurable limits： 4.76E-04Unit：Bq/cm3 |
System A： ND Measurable limits： 2.2E-01Unit：Bq/cm3 |
System A： ND Measurable limits： 3.2E-01Unit：Bq/cm3 |
||
| water level |
Water level of accumulated water in PCV |
Approx. 2.8m from bottom part (As of 10.10,2012) |
Approx. 0.3m from bottom part (As of 6.6,2014) |
Estimated to be approx. 6.5m from bottom part (As of 5,2014) | ||
| Water level of accumlated water in torus room | OP3700mm (As of 2.20,2013) |
OP3160mm (As of 1.16,2014) |
OP3370mm (As of 6.6,2012) |
|||
| Water level of accumlated water in triangle courner | OP3910-4420mm (As of 9.20,2012) |
OP3050-3190mm (As of 6.28,2012) |
OP3150 (As of 6.6,2012) |
|||
| data of fuel debris |
Mass of fuel debris | Unidentified | Unidentified | Unidentified | ||
| Distribution of fuel debiris (assumption) | Most of the fuel has fallen down into the PCV | Existing the core part, lower plenum and PCV, but the ratio among those locations is unknown | Existing the core part, lower plenum and PCV, but the ratio among those locations is unknown | |||
| MCCI products | Unidentified | Unidentified | Unidentified | |||
| Dose rate | Unidentified | Unidentified | Unidentified | |||
| Hardness | Unidentified | Unidentified | Unidentified | |||
| Density | Unidentified Refer to page 14 regarding to the hardness of simulated debris. |
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*RPV：Reactor Pressure Vessel *PCV：Primary Containment Vessel