Abstract
The ultimate purpose of the nuclear power plant safety is to protect the public and the environment from unacceptable radiation exposure in all operational states. This paper presents a novel severe accident management framework to cope with the risk of radioactive material release to the environment. The objective is to reduce the contribution of severe accidents to the large and early release frequencies of radioactive materials for a VVER-1000 nuclear reactor. The proposed approach includes the emergency actions of NPP personnel aiming to recover the lost alternating power and restore the core cooling process by all means available at the site. In addition, mobile equipment including a diesel generator and some mobile diesel pumps for termination of the core melting process at the early stage of accident have been procured. In order to determine if sufficient provisions have been made, a level 2 PSA study has been conducted.
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