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The AIRM system, which uses the 16N activity in the VVÉR-1000 reactor at the Kalinin nuclear power plant to measure the thermal power of the reactor and the coolant flow rate, and similar systems used in nuclear power plants with PWR reactors are described. The influence of a change in the neutron spectrum as a result of the loss of 235U and the accumulation of 239Pu and 241Pu in the VVÉR-1000 core...
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