Unlock instant, AI-driven research and patent intelligence for your innovation.

Thermal coupling calculation method for lead-bismuth reactor system

A calculation method and thermal coupling technology, applied in the field of nuclear reactor safety analysis, can solve problems such as insufficient adiabatic assumptions, increased reactor system safety threats, and increased temperature difference, and achieve the effect of facilitating rapid iteration

Active Publication Date: 2021-12-14
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when analyzing target-stack coupling accidents, the adiabatic assumption is not conservative enough due to the increased temperature difference between the two
For example: a spallation target loss accident, the coolant flow rate of the target system decreases, the temperature rises, and the heat is transferred to the reactor, increasing the safety threat of the reactor system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermal coupling calculation method for lead-bismuth reactor system
  • Thermal coupling calculation method for lead-bismuth reactor system
  • Thermal coupling calculation method for lead-bismuth reactor system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: Code-level in-coupling implementation. Such as figure 2 As shown, the software coordinated with the algorithm of the present invention is mainly composed of a material module, an equipment module, an input module, an initialization module, a calculation module, an output module, etc.; wherein the calculation module is the core, and the calculation module is divided into a core system calculation unit, Spallation target system calculation unit and target stack boundary calculation unit.

[0048] The components and functions of each module are as follows:

[0049] Material module: defines the basic physical properties, hydraulic relations, and heat transfer relations of various materials (such as liquid lead and bismuth) required for calculation; it can be called during modeling.

[0050] Equipment module: defines the mathematical physical model of key equipment in the target system and stack system; it can be called when modeling.

[0051] Input module:...

Embodiment 2

[0058] Embodiment 2: Implementation of outcoupling between different software. Such as image 3 As shown, it is a subcritical lead-bismuth stack system. The external source is generated by the beam bombarding the liquid lead-bismuth target. The lead-bismuth stack and the lead-bismuth target have their own independent cooling circuits (target cooling system 1 and stack cooling system 2). The steps of performing thermal coupling analysis on the core-to-target coupling area 3 are as follows:

[0059] Step 1: Use the system program to carry out steady-state calculations for the reactor system and the target system respectively, obtain the flow and temperature fields inside the system, and give the temperature and flow of the core inlet and outlet and the target head inlet and outlet.

[0060] Step 2: Using the stack, target inlet and outlet temperatures, and flow rates calculated by the above system program as boundary conditions, use CFD software to calculate a detailed target-s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of nuclear reactor safety analysis, and particularly discloses a thermal coupling calculation method for a lead-bismuth reactor system. The method comprises steady calculation and transient calculation, wherein a result of the steady calculation is an initial value condition of the transient calculation, and the steady calculation needs to be performed before the transient calculation. According to the calculation method provided by the invention, real-time heat transfer between a target area and a reactor area is considered, so that descriptions of accident conditions are finer; software developed on the basis of the calculation method can be used for researching thermal coupling characteristics between a target and a reactor of an accelerator-driven subcritical lead-bismuth reactor system under the accident conditions and influences of the thermal coupling characteristics on the safety of the whole system, and reference is provided for design and optimization of the system; local detail description and overall calculation efficiency are considered, so that influences of heat transfer at boundaries on the whole system can be effectively described, the calculation efficiency is not too low (such as three-dimensional modeling of the whole system), and rapid iteration of a design scheme is facilitated; and the whole software system can have complete proprietary intellectual property rights.

Description

technical field [0001] The invention relates to the field of nuclear reactor safety analysis, in particular to a thermal coupling calculation method for a lead-bismuth reactor system. Background technique [0002] The lead-bismuth pile is one of the six candidate pile types of the fourth-generation pile, and has a good development prospect. At present, people's research on lead-bismuth piles can be divided into two categories: one is critical piles that focus on power supply, and the other is subcritical piles that focus on spent fuel transmutation. The present invention is mainly aimed at subcritical lead-bismuth piles. [0003] The subcritical lead-bismuth pile needs to rely on exogenous neutrons to maintain the fission reaction, and the exogenous neutrons are generally produced by the accelerator bombarding the spallation target. The subcritical lead-bismuth pile surrounds the outside of the spallation target as a cladding, and there is a structural boundary between the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F17/18G06F113/08G06F119/08G06F119/14
CPCG06F30/28G06F17/18G06F2113/08G06F2119/08G06F2119/14Y02E30/30
Inventor 陈康汤春桃林千钱雅兰
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD