METHOD OF SIMULTANEOUS REPRODUCING SPECIFIED NEUTRON FLUENCE VALUES AND EXPOSURE DOSE OF GAMMA-RADIATION IN RESEARCH REACTORS Russian patent published in 2018 - IPC G21K5/00 

FIELD: physics.

SUBSTANCE: invention relates to the facilities for testing objects for radiation resistance in the fields of radiation from research reactors, namely to the method of simultaneous reproducing specified neutron fluence values (F_spec) and the exposure dose of gamma radiation (D_spec). In the test volume of the reactor, a gamma-neutron radiation field is formed using thermal neutron converters to gamma quanta located outside the direct effect section of the symmetrical core reactor emissions. At distances (R) along the axis passing through the center of A3 in the direction of the predicted placement of the test object, the neutron fluence with energies above 0.1 MeV (F_0.1) and the exposure dose of gamma radiation (Dγ) at constant sizes of converters and the chosen scheme of their placement. Then, from the function F_0.1(R)/Dγ(R) the distance is determined, where F_0.1/Dγ=F_spec/D_spec, and from the function K_n(R)=F_0.1(R)/N - the value of the parameter K_n. Further, by the formula P⋅t=F_spec/K_n ⋅α the reactor power (P) and the duration (t) of the irradiation of the test object are selected, ensuring the reproduction of the specified emission parameters, where N is the reading of the measurement channel, α=N/Q is the sensitivity coefficient of the measuring channel, Q is the energy release in the core of the reactor.

EFFECT: simultaneous reproduction of the specified parameters of emissions in a wide range of values with a simplified technology for reproducing these parameters.

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