Now, cassette SGs are operated as a part of transport VVER reactor plants. More than 212000 straight-tube steam generating elements operate as part of cassette SGs.

Total operating experience of all active steam generators is more that 500000 hours. Simulating a standard operation model in the laboratory verified lifetime of more than 100000 hours.

Cassette SGs have never failed during operation.

2. CONCLUSION

Positive experience of theoretical and experimental investigations, accumulated in OKBM, the results of cassette steam generator operations in operating PWRs, wide layout potentialities of cassette steam generators in combination with high specific characteristics (compactness and specific power) allowed development of integral type reactor plants, of various powers (including 600 MW electric power) and purposes.