Screening methods for time-sensitive incidents affecting operator non-intervention

A technology of intervention time and screening method, applied in the field of accident screening, can solve problems such as uncontrollable unit state, achieve the effect of optimizing accident procedures and reducing human-related events

Active Publication Date: 2021-11-16
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, for complex accident conditions, in view of the complexity and correlation of unit state parameter changes, limitations in the design or installation of some instruments and equipment, and considering that some specially designed safety systems will cause the unit state to be uncontrollable, it is also necessary to Taking into account the recovery of accident conditions and other aspects, the automatic action of the safety system alone is not enough to ensure that the accident consequences meet the acceptance criteria

Method used

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  • Screening methods for time-sensitive incidents affecting operator non-intervention

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The present invention judges whether a certain accident is an operator intervention sensitive accident, that is to judge whether the operator's intervention is extremely important to the development of the accident. This importance should be considered within the time requirements allowed for non-intervention by the operator. There will be a unified indicator for the requirement to ensure the time for the operator not to intervene after the unit accident, but in fact, it takes a certain amount of time for the operator to judge, operate the equipment, and operate the equipment. Therefore, for each specific working condition, In essence, the flight crew’s requirements for the operator’s non-intervention time should consider an additional item on the basis of the baseline non-intervention time, which includes the per...

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Abstract

The invention relates to a screening method for time-sensitive accidents that affect the operator's non-intervention, comprising the following steps: determining the type of accident and acceptance criteria; analyzing the main intervention content of the operator to determine the overlapping time of the operator's non-intervention; performing accident analysis and judging the operator Intervention within a certain time requirement is a necessary condition for accident handling to meet the acceptance criteria; establish a probabilistic safety analysis model, and analyze whether there is a human-caused event in the probabilistic safety analysis model. The screening method of the present invention screens out operators not intervening in sensitive accidents, thereby judging weak links in the design of nuclear power plant units, and provides a basis for further improvement of nuclear power plants.

Description

technical field [0001] The invention belongs to an accident screening method, in particular to a screening method that affects operators not to intervene in time-sensitive accidents. Background technique [0002] In response to design basis accidents, nuclear power plants have designed special safety systems such as safety injection systems, and other auxiliary systems also undertake part of the safety functions. In order to ensure the correct activation of the safety function of the safety system, a protection system and related instruments are set up. When the accident condition develops and certain state parameters reach a certain threshold, the emergency shutdown of the reactor or the action of special safety systems and facilities can be triggered to protect the unit and alleviate the consequences of the accident. [0003] By reasonably setting the protection logic and threshold of the protection system, it can be ensured that in some accident scenarios, the accident c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
Inventor 赵思桥刘海宇唐涛孙涛高超
Owner CHINA NUCLEAR POWER ENG CO LTD
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