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Method for determining the volumetric power distribution of the core of a nuclear reactor

A three-dimensional power, nuclear reactor technology, applied in the direction of nuclear reactor monitoring, reactor, nuclear engineering solutions, etc.

Active Publication Date: 2014-02-19
FRAMATOME ANP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, these methods necessitate the addition of additional instrumentation in the core

Method used

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  • Method for determining the volumetric power distribution of the core of a nuclear reactor
  • Method for determining the volumetric power distribution of the core of a nuclear reactor

Examples

Experimental program
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Effect test

Embodiment Construction

[0036] figure 1 A vessel 1 of a pressurized water reactor is schematically represented.

[0037] The vessel 1 comprises a core 6 equipped with fuel assemblies and is equipped with:

[0038] - A probe 3 (called a core exit thermocouple) for measuring the temperature of the refrigerant at the exit of the core constituent fuel assemblies.

[0039] - A cavity 4 for measuring the neutron flux outside the core (referred to as the extra-core cavity).

[0040] In-core instrumentation 8 consisting of in-core detectors 7 .

[0041] The core monitoring method according to the invention is implemented by programmed means 5 . This monitoring method is based on the calculation of at least one limiting parameter for the normal operation of the reactor core 6 from the current three-dimensional distribution of the power of the core 6, which is obtained from the current state of the pressurized water reactor (PWR) It is determined by measurements and three-dimensional neutron calculations p...

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Abstract

The method involves determining power density distribution of a core of a nuclear reactor from operating parameter values of the reactor by utilizing a neutron calculation code instantaneously resolving a diffusion equation and updating an isotope balance of the core during exhausting of fuel. A new power density distribution is determined by adjusting the power density distribution with measurements delivered by neutron flux measurement detectors and temperature measurement thermocouples, where the detectors are arranged outside a tank of the reactor. An independent claim is also included for a computer program comprising instruction to perform a method for determining power density distribution of a core of a nuclear reactor.

Description

technical field [0001] The invention relates to a method for determining a three-dimensional power distribution of a nuclear reactor core. Another object of the present invention is to monitor at least one limiting parameter of the normal operation of the nuclear reactor core. The present invention is particularly suitable for pressurized water nuclear reactors. Background technique [0002] In normal operation, the core of a nuclear reactor must comply with certain conditions that guarantee compliance with safety standards in the event of an accident. These conditions, referred to as Type 1 conditions, correspond to the initial states taken in security studies; therefore, exceeding these conditions in normal operation undermines security verification. Continuous verification of compliance with normal operating limits defines the function of "monitoring core pre-accident conditions". [0003] These conditions are formulated from parameters representing the specific activa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/10
CPCG21Y2004/30G21C17/10G21Y2002/304G21D3/001G21Y2002/301G21Y2002/204Y02E30/40Y02E30/00Y02E30/30
Inventor A·戈蒂埃D·迪雷
Owner FRAMATOME ANP
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