Neutron source intensity calculation method, storage medium and real-time online reactivity meter

Abstract

The invention relates to the field of reactor testing, in particular to a neutron source intensity calculation method, a storage medium and a real-time online reactivity meter. The neutron source intensity calculation method comprises the steps that a power level n in a deep subcritical stable state is obtained through measurement; keff or reactivity rho in the deep subcritical state, and instantaneous neutron average substitution time l or instantaneous neutron service life l0 are calculated; and the neutron source intensity is calculated according to the rho, the n and the l, and when Keff is smaller than 0.98 or rho is smaller than -2000 pcm, the measurement error of the neutron source intensity meets the engineering application requirement. The neutron source is calculated through theneutron source intensity calculation method, the measurement error of the neutron source intensity can be guaranteed, and therefore the calculation correctness and full-range coverage of reactivity ina low-power state are guaranteed.

Description

technical field

[0001] The invention relates to the field of reactor testing, in particular to a neutron source strength calculation method, a storage medium and a real-time on-line reactivity meter. Background technique

[0002] Reactivity is the relative deviation of the effective value-added coefficient Keff of the reactor from the critical value, and is an important parameter reflecting the operation of the reactor when the reactor is physically started. Its accurate measurement is of great significance to the safe operation of the reactor and its economic benefits.

[0003] However, the power level of nuclear reactors varies by more than ten orders of magnitude, which cannot be fully covered by one detector. Therefore, the reactivity instrument needs to receive multiple nuclear detection signals to support full-scale coverage. The inverse dynamic calculation includes the intensity of the neutron source, so as to ensure the response Full-scale coverage of performance ca...

Examples

specific Embodiment approach

[0066] see Figure 1 to Figure 3 , in this embodiment, a method for calculating neutron source intensity can be applied to storage media, which include but not limited to: reactivity meters, personal computers, servers, general-purpose computers, special-purpose computers, network equipment, embedded devices, programmable devices, etc. The specific implementation is as follows:

[0067] Step S101: Measure the power level n in the deep subcritical steady state.

[0068] Step S102: Calculate the keff or reactivity ρ in this deep subcritical state, and the average generation time l of prompt neutrons or lifetime l of prompt neutrons 0 .

[0069] Step S103: Calculate the neutron source intensity according to the ρ, n and l. When Keff<0.98 or ρ<-2000pcm, the measurement error of the neutron source intensity meets the requirements of engineering applications. In this embodiment, the so-called compliance with engineering application requirements means: when Keff<0.98 or ρ<-2000pc...

technical field

[0001] The invention relates to the field of reactor testing, in particular to a neutron source strength calculation method, a storage medium and a real-time on-line reactivity meter. Background technique

[0002] Reactivity is the relative deviation of the effective value-added coefficient Keff of the reactor from the critical value, and is an important parameter reflecting the operation of the reactor when the reactor is physically started. Its accurate measurement is of great significance to the safe operation of the reactor and its economic benefits.

[0003] However, the power level of nuclear reactors varies by more than ten orders of magnitude, which cannot be fully covered by one detector. Therefore, the reactivity instrument needs to receive multiple nuclear detection signals to support full-scale coverage. The inverse dynamic calculation includes the intensity of the neutron source, so as to ensure the response Full-scale coverage of performance ca...

Examples

specific Embodiment approach

[0066] see Figure 1 to Figure 3 , in this embodiment, a method for calculating neutron source intensity can be applied to storage media, which include but not limited to: reactivity meters, personal computers, servers, general-purpose computers, special-purpose computers, network equipment, embedded devices, programmable devices, etc. The specific implementation is as follows:

[0067] Step S101: Measure the power level n in the deep subcritical steady state.

[0068] Step S102: Calculate the keff or reactivity ρ in this deep subcritical state, and the average generation time l of prompt neutrons or lifetime l of prompt neutrons 0 .

[0069] Step S103: Calculate the neutron source intensity according to the ρ, n and l. When Keff<0.98 or ρ<-2000pcm, the measurement error of the neutron source intensity meets the requirements of engineering applications. In this embodiment, the so-called compliance with engineering application requirements means: when Keff<0.98 or ρ<-2000pc...

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