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Detection method and special detection system for silica precipitation performance of nuclear power plant water filter element

A silica and water filter technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of simulated performance detection of water filter elements, low detection accuracy, and actual system pollution, etc., to achieve true and reliable data , high verification efficiency and high simulation degree

Active Publication Date: 2018-01-19
HENAN HEJING CLEANING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, laboratory experiments cannot realize the simulated performance test of the water filter element in the operating state, but indirectly verify it through the laboratory static immersion test of the main raw materials, and then install the filter element in the nuclear power system and verify it through actual operation monitoring The operating characteristics of the filter element have the disadvantages of low detection accuracy, which may cause pollution to the actual system, and may even cause shutdown accidents

Method used

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  • Detection method and special detection system for silica precipitation performance of nuclear power plant water filter element
  • Detection method and special detection system for silica precipitation performance of nuclear power plant water filter element

Examples

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Effect test

Embodiment 1

[0034] A method for detecting the silica precipitation performance of a nuclear power plant water filter element, comprising the following steps:

[0035] (1) Put the tested filter element (10 inches—5 μm) into the system, add a mixed solution of boric acid with a concentration of 200ppm and LiOH with a concentration of 1.24±10%ppm, so that the height of the solution reaches the upper and lower marks of the liquid level indicator;

[0036] (2) Turn on the pneumatic pump and adjust the flow regulating valve to reach the rated flow rate of the filter element of 4.2m 3 / h;

[0037] (3) Take the initial water sample from the sampling port, to be submitted for inspection and obtain the original concentration of silica in the liquid;

[0038] (4) Turn on the electric heater to gradually increase the temperature to the working temperature of 72±2°C and keep it within this temperature range;

[0039] (5) Sampling on time, the sampling frequency is 1-3 days, 1 time / 24 hours; after th...

Embodiment 2

[0041] The method for detecting the silica precipitation performance of the nuclear power plant water filter element comprises the following steps:

[0042] (1) Put the tested filter element (10 inches—25 μm) into the system, add a mixed solution of boric acid with a concentration of 200ppm and LiOH with a concentration of 1.24±10%ppm, so that the height of the solution reaches the upper and lower marks of the liquid level indicator;

[0043] (2) Turn on the pneumatic pump and adjust the flow regulating valve to reach the rated flow rate of the filter element of 8.4m 3 / h;

[0044] (3) Take the initial water sample from the sampling port, to be submitted for inspection and obtain the original concentration of silica in the liquid;

[0045] (4) Turn on the electric heater to gradually increase the temperature to the working temperature of 72±2°C and keep it within this temperature range;

[0046] (5) Sampling on time, the sampling frequency is 1-3 days, 1 time / 24 hours; after...

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Abstract

A method for testing the silica precipitation performance of a water filter element in a nuclear power plant. It is a laboratory testing method that simulates the working condition of a water filter element in a nuclear power plant to measure the precipitated silica. The tested filter element is installed into the detection system. In the pipeline, when the experimental medium passes through the filter element at the rated flow rate and the maximum operating temperature is maintained, the experimental medium is regularly sampled and submitted for inspection. After the inspection, the test data is analyzed to determine whether the silica precipitated from the filter element exceeds the standard. The basis for the inspection. Standard SL 91.2-1994 "Determination of Silica (Soluble) (Silicon Molybdenum Blue Spectrophotometry)". The invention can realize the simulated detection of silicon dioxide precipitated by the water filter element of the nuclear power plant under the conditions of rated flow rate, maximum operating temperature and close to the composition of the working medium. It can obtain the specific operating parameters of the filter element under approximately real working conditions, improve the efficiency of filter element performance verification, and reduce the risk impact of new filter element products on the operational safety of the nuclear power system.

Description

technical field [0001] The invention relates to a method for testing the performance of a water filter element in a nuclear facility, in particular to a laboratory test method for simulating the performance of a water filter element in a nuclear power plant for the precipitation of silicon dioxide in a working state, and is applicable to the water filter element for a nuclear power plant Type inspection or performance verification of the development process. Background technique [0002] With the rapid development of nuclear power technology and the continuous improvement of safety requirements, the performance of water filter elements installed and used in nuclear facilities has also been improved accordingly. There are strict control requirements for the concentration of silica precipitated during its operation to avoid silicon elements. Attached to nuclear fuel cladding and fuel rods in various forms, affecting heat transfer efficiency, and even endangering the safety of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00G01N33/0078
Inventor 邹涤李西峰卢岩杨亚鹏杨栋王茂王建峰曾心耀
Owner HENAN HEJING CLEANING TECH
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