A PWR Primary Circuit Radioactive Iodine Concentration Control System and Control Method

A control system and radioactive iodine technology are applied in the primary circuit radioactive iodine concentration control system of a pressurized water reactor and its control field to achieve good effects and reduce effects

Active Publication Date: 2021-11-30
JIANGSU NUCLEAR POWER CORP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a pressurized water reactor primary circuit radioactive iodine concentration control system and its control method for the above-mentioned deficiencies in the prior art, which is used to solve the technology in the prior art that needs to rely on the operation of the main pump to control the iodine concentration of the primary circuit question

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  • A PWR Primary Circuit Radioactive Iodine Concentration Control System and Control Method

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Embodiment Construction

[0023] The technology of the present invention is further described below:

[0024] Such as figure 1 As shown, a PWR primary loop radioactive iodine concentration control system includes: one end of the reactor 1 is connected to the steam generator A3 through the hot section A2 of the main pipeline, and the other end of the reactor 1 is connected to the main pump A5 through the cold section A6 of the main pipeline. The main pipeline transition section A4 is also connected between the steam generator A3 and the main pump A5; the main pipeline transition section A4 is also connected to the boron water storage tank A8 through the waste heat derivation system pipeline A7; the boron water storage tank A8 is also connected with one end of the exhaust pool purification system and the low pressure safety injection system pump A9 respectively; the other end of the low pressure safety injection system pump A9 is connected to the reactor 1; the other end of the exhaust pool purification ...

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Abstract

The invention belongs to the technical field of control of radioactive source items in the primary circuit of a nuclear power plant, and specifically relates to a radioactive iodine concentration control system and a control method for the primary circuit of a pressurized water reactor. Carry out rapid and large-scale water changes; Step 2: Use the clean boron water in the boron water storage tank B to perform intermittent water changes on the primary circuit; Step 3: Use the clean boron water in the boron water storage tank B to perform rapid and large-scale water changes on the primary circuit water. The method of the invention can reduce the concentration of radioactive iodine in the primary circuit to below the control level by performing water exchange and purification operations on the primary circuit coolant and boron water storage tank, without the need for hardware modification costs, and can continue to purify after delaying the lifting of the reactor top cover During this period, the main pump and steam generator can be installed with sealing blocking plates, and the follow-up maintenance work can be carried out normally, so as to reduce the impact on the overhaul process of the unit.

Description

technical field [0001] The invention belongs to the technical field of controlling radioactive source items in a primary circuit of a nuclear power plant, and in particular relates to a radioactive iodine concentration control system and a control method for a primary circuit of a pressurized water reactor. Background technique [0002] During the operation of PWR nuclear power units, the fuel cladding is damaged from time to time; during the overhaul shutdown to reduce the temperature and pressure, gaseous fission products such as radioactive iodine in the fuel quickly enter the primary circuit coolant in large quantities through cladding defects, resulting in spikes (according to According to the research and statistics of the NRC of the US Nuclear Regulatory Commission, the peak effect of the shutdown process can cause the concentration of radioactive iodine in the primary circuit to increase by 1000 times); after the primary circuit system equipment is opened, the radioac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/307G21F9/06
CPCG21C19/307G21F9/06Y02E30/30
Inventor 李中华丁长龙易柏元李泽祥周勋陈皞赵鸿翮潘同金
Owner JIANGSU NUCLEAR POWER CORP
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