Abstract
The modern NPPs (Nuclear Power Plants) are the part of the very complex and demanding sector of industry. Its complexity is based on the innovate and the high-tech technologies, engineered safety features where the specific safety functions are to be performed to ensure the nuclear safety (as part of technosphere safety) and prevent radioactivity release, which consequently lead to the possible human losses and environmental disasters. Consequently, modern technologies incorporated in the design and construction of NPP (its systems, structure and components) shall be qualified to ensure its capability to perform designated safety functions in the demanded conditions, including harsh accident environment (qualified as intended) via the specific V&V activities. Thus, Qualification should not cover only the equipment, but the all: systems, structures and components (SSC), therefore a systematic approach to its organization and planning is needed, which is not fully presented in publications nowadays. The article objective is to define the SSC Qualification and its scope of application, identify the Functional and Environmental qualification and forming of the Qualification context. Then, the article determines the V&V actions that provide Qualification evidences.
Highlights
The modern NPPs (Nuclear Power Plants) are the very complex and demanding industrial civil facilities. their complexity is based on the innovate and the high-tech technologies, engineered safety features where the specific safety functions are to be performed to ensure the nuclear safety if the incident or accident will accrue at the NPP
Protection is achieved through the use of numerous design provisions (implemented in addition to standard technological processes for the electricity production) that aim to prevent the loss of safety functions under the influence of internal or external hazards, initiating events, which can be cause for violation of normal operation and failures of components, systems and structures
Modern technologies incorporated in the design and construction of NPP shall be Qualified to ensure capability of the structures and components (SSC) to perform designated safety functions in the demanded conditions, including harsh accident environment via the specific Verification and validation process (V&V) activities, focused on the safety functions
Summary
The modern NPPs (Nuclear Power Plants) are the very complex and demanding industrial civil facilities. their complexity is based on the innovate and the high-tech technologies, engineered safety features where the specific safety functions are to be performed to ensure the nuclear safety (as part of technosphere safety) if the incident or accident will accrue at the NPP. Their complexity is based on the innovate and the high-tech technologies, engineered safety features where the specific safety functions are to be performed to ensure the nuclear safety (as part of technosphere safety) if the incident or accident will accrue at the NPP. The biggest of the nuclear accidents were: Three-Mile Island NPP accident in the USA in 1979, Chernobyl NPP accident in 1986, Fukushima-1 NPP in Japan in 2011 Verification and validation process (V&V) is used for confirmation of requirements compliance This process was widely investigated in articles and publications: in general in the [8,9,10], and in the different industry areas (e.g. for hydropower units in [11]). Specific areas as the nuclear testing verification [15], equipment and civil structures V&V against the safety requirements in the [16,17]
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