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Registration Number

0219U000534, 0117U003533 , R & D reports

Title

Embrittlement of Rivne NPP unit 1 reactor vessel due to re-irradiation after recovery annealing

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Head

Shkapyak Oleksandr Viktorovych,

Registration Date

05-02-2019

Organization

Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine

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The report presents results of surveillance specimens tests of Rivne NPP unit 1 reactor vessel. The shifts of critical temperature of brittleness for reactor vessel base metal and weld metal is determined. Comparison of the experimental results and standard approaches for assessment of re-irradiation embrittlement is carried out. It is concluded that the rate of materials radiation strengthening due to re-irradiation after annealing does not exceed the value of primary irradiation. The reduction of the ductile properties of the weld metal depends on the phosphorus content in the material.

Product Description

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Голяк Микола Геннадійович
Тригубенко Олександр Вікторович

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2020-04-02