For How Long will Sea Water stay out of Contact with Radionuclides in Dumped Nuclear Reactors?

To estimate the life time of the Furfurol compound used for solidifying spent nuclear fuel (SNF) from the 'Lenin' ice-breaker reactor, the absorbed and integral radiation dose rates in the compound employed have been calculated. The calculations show that the absorbed dose to date is 4 MGy. The maximum dose of 7.3 MGy will be achieved in approximately 200 years after dumping a SNF cask. This value does not exceed the threshold dose of 20 MGy, which could give rise to the deterioration of Furfurol's protective characteristics. (author)