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Tritium protection system and method for helium-3 transient test

A transient test and protection system technology, applied in the field of tritium protection system for helium-3 gas circuit, can solve the problems of high environmental emission requirements and difficult protection, reduce diffusion, reduce absorbed dose, and ensure test safe effect

Inactive Publication Date: 2019-11-22
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tritium is highly diffusible and harmful, difficult to protect, and has high requirements for the environmental discharge of tritium. Therefore, the most critical safety issue of the fuel element power transient test system based on helium-3 is the protection of tritium.

Method used

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  • Tritium protection system and method for helium-3 transient test

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Embodiment 1

[0028] The tritium protection system that is used for helium-3 power transient test of embodiment 1, below in conjunction with attached figure 1 Description of the invention

[0029] The tritium protection system used for the helium-3 power transient test mainly consists of a helium-3 gas circuit, a glove box tritium containment system, a glove box tritium emergency treatment system, and a tritium online monitoring system. Among them, the helium-3 gas circuit (referred to as the helium-3 circuit) mainly includes irradiation devices, detritium removers, pressure regulating devices, molecular sieve dryers for circuits, and gas circulation pumps, etc. The glove box containment system mainly includes glove boxes and related ventilation equipment etc. The glove box tritium emergency treatment system mainly includes 1 glove box, 2 vacuum pumps, 2 molecular sieve dryers for glove boxes, 2 filters, 1 gas storage tank, etc. The tritium on-line monitoring system mainly includes sampling...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that when a slight or large leakage occurs in the helium-3 circuit, the glove box tritium emergency treatment system of the present invention is used for purification and adsorption of tritium for normal release and compressed storage for accidental release. The specific setting method is as follows:

[0034] The glove box tritium emergency treatment system is mainly composed of a glove box, a vacuum pump, a molecular sieve dryer for the glove box, a filter, and a gas storage tank. There are two emergency treatment methods, one is the local circulation purification and adsorption of the glove box, which is suitable for the situation where the tritium concentration exceeds the limit for a long time, and the other is the glove box pumping and compressing storage, which is suitable for the short-term tritium release accident. When a small leakage accident occurs in the helium-3 circuit and the tritium concentration...

Embodiment 3

[0037] The difference between this embodiment and embodiment 1 or embodiment 2 is that, in order to monitor the tritium concentration in the helium-3 gas circuit, the glove box and the process room in real time, the present invention adds multi-point sampling and multi-method on-line monitoring, providing operators with Operational safety and environmental safety provide two levels of alarms. The specific setting method is as follows:

[0038] The tritium online monitoring system is to monitor the gaseous tritium concentration in the helium-3 gas in the helium-3 circuit in real time, in the glove box and in the air of the process room, reduce the pollution to the process room and the surrounding environment, and ensure the safety of operators. The helium-3 circuit draws out part of the helium-3 gas containing tritium at normal temperature and pressure from the inlet and outlet of the detritrator of the vacuum pipeline through the sampling tube for measurement. , A portable mo...

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Abstract

The invention discloses a tritium protection system and method for a helium-3 transient test. The system is composed of a helium-3 gas loop, a glove box containing system, a glove box emergency systemand a tritium online monitoring system. The helium-3 gas loop, the glove box containing system and a sealing process chamber form a three-level containing barrier for tritium in helium-3 gas, and each containing system of the tritium online monitoring system performs multi-point sampling and multi-method online monitoring. According to the helium-3 gas loop, tritium gas and tritiated water are removed through the combination of a tritium remover and a molecular sieve dryer for the loop, and Al2O3 coating is performed on the surfaces of the tritium remover and the helium-3 gas screen structure, so that the permeation amount of high-temperature and high-pressure tritium is reduced. According to the glove box emergency system, accidents of relatively long-time tiny tritium leakage and relatively short-time massive tritium leakage of a helium-3 loop are respectively handled through glove box purification adsorption and air exhaust compression storage modes. The tritium protection system and method can be used for nuclear fuel power transient tests, online irradiation tritium production tests, tritium breeding agent in-reactor irradiation and the like.

Description

technical field [0001] The invention relates to the field of tritium protection for helium-3 power transient tests, in particular to a tritium protection system and method for helium-3 gas circuits, which can be used for power transient tests in helium-3 reactors and based on helium-3 The on-line irradiation production research of gaseous tritium provides safety guarantee for the research and development of advanced nuclear fuel elements and the production of tritium isotopes. Background technique [0002] In research reactors, the helium-3 transient test is a very important test method to explore the influence of different irradiation power changes on the safety of fuel elements. However, in the helium-3 transient test loop, the helium-3 gas absorbs neutrons in the reactor and produces radioactive tritium through the (n,p) nuclear reaction. Tritium is highly diffusible and harmful, difficult to protect, and has high requirements on the environmental discharge of tritium. T...

Claims

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Application Information

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IPC IPC(8): G21F7/00G21F7/04G21C17/00G21C17/07
CPCG21C17/00G21C17/002G21C17/07G21F7/00G21F7/04Y02E30/30
Inventor 李炳林甯尤军王洪胡腾郑华林郭骏宇丁亮亮柳晖
Owner NUCLEAR POWER INSTITUTE OF CHINA
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