Mobile on site grouting unit
SOCODEI operates a mobile grouting unit for immobilising radioactive concentrates produced by the evaporation of liquid waste produced by nuclear power plants.
This unit implements a process using a hydraulic binder that complies with ANDRA specifications. The packages produced are intended for surface storage.
The unit consists of the following modules:
- The grouting unit itself, together with an integral control station
- A trailer for road transportation
- A workshop container
The concentrates are conditioned in C1-type concrete shells:
- Production rate for one shift: 5 packages
Acceptance criteria
Processed waste:
- Liquid waste evaporation concentrates.
Physico-chemical properties:
- Boron concentration: < 30 000 ppm
- Sodium/boron molar ratio: 0,20 to 0,25
- Dry extract < 300 g/l
- Phosphate concentration < 20 g/l
- Temperature between 45 and 55°C
Acceptable radionuclides:
58Co, 60Co, 110mAg, 54Mn, 57Co, 134Cs, 137Cs, etc. (non-exhaustive list)
Radiological criteria:
Total activity of beta and gamma emitters: < 13 500 GBq/m3(encapsulation limit).
Storage conditions:
The premises must allow sealed packages to dry undisturbed for 7 days at a temperature above 5°C.
Package used :C1PG-type concrete shell