Secondary neutron source supply method for starting first cycle of nuclear power station

Pending Publication Date: 2021-11-23
LIAONING HONGYANHE NUCLEAR POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to various reasons, the critical milestones of fuel charging of newly-built units have great uncertainty, and it often takes a short period of time before fuel charging to determine a relatively accurate fuel charging milestone. The half-life of the source (Sb-Be) is short (about 60.2 days). If the activated secondary neutron source is taken out too early, the intensity of the secondary neutron source will decay to not enough for charging and starting, which will lead to new The unit could not be loaded and started in time, causing a serious delay in the progress of the unit under construction and causing heavy losses to the project construction

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  • Secondary neutron source supply method for starting first cycle of nuclear power station
  • Secondary neutron source supply method for starting first cycle of nuclear power station

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] like figure 1 As shown, in an embodiment of the present invention, a secondary neutron source supply method for the first cycle start-up of a nuclear power plant is provided, and the method includes the following steps:

[0027] Step S1, obtaining the current newly-built units in the nuclear power plant and their loading start-up time, and obtaining at least one operating unit in the nuclear power plant that has been activated by cyclic irradiation with a pre-installed secondary neutron source and their current planned maintenance time;

[0028] Step S2. Before the charging start time of the newly-built unit arrives, combine the currently planned maintenance time of each operating unit obtained, and select all the obtained operating units that meet the pre-...

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Abstract

The invention provides a secondary neutron source supply method for starting a first cycle of a nuclear power station, which comprises the following steps of: acquiring a current newly-built unit in the nuclear power station and the charging starting time thereof, and acquiring at least one operating unit with a pre-installed secondary neutron source which is activated by circulating irradiation in the nuclear power station and the current planned maintenance time of each operating unit; and before the charging starting time of the current newly-built unit arrives, in combination with the obtained currently planned maintenance time of each operation unit, screening out the operation unit meeting the secondary neutron source pre-unloading condition from all the obtained operation units, and unloading the secondary neutron source so as to supply the secondary neutron source to the current newly-built unit. The method has operability, so that the loading starting requirement of a newly-built unit is ensured, and the practical engineering application is achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a method for supplying a secondary neutron source used for starting the first cycle of a nuclear power plant. Background technique [0002] According to the original design of the reactor, two sets of primary neutron source (252Cf) components and two sets of secondary neutron source (Sb-Be) components are generally purchased in the first cycle. Among them, the primary neutron source is used in the first cycle for the first refueling start-up; the secondary neutron source is activated in the first cycle for subsequent cycles to replace the primary neutron source for the reactor to start after refueling. [0003] Compared with refueling and overhaul, the construction period and milestones of nuclear power projects have greater uncertainty. The half-life of a primary neutron source (252Cf) is 2.65 years, which is generally sufficient to deal with the uncertainty of project con...

Claims

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Application Information

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IPC IPC(8): G21C7/34
CPCG21C7/34Y02E30/30
Inventor胡汝平邓平赳何洋
OwnerLIAONING HONGYANHE NUCLEAR POWER