Inherent safety pool case combination low-temperature stack nuclear heating station apparatus and operational procedure thereof

Abstract

The present invention provides an inherent security pool-shell combination low temperature nuclear heating device and an operation program thereof, which belongs to nuclear energy centralized heat-supply field. The invention mainly comprises the following procedures: adopting separated layout, forced circulation and high effective small temperature difference heat exchange in primary loop of reactor; under the precondition that parameter requirements of centralized heat-supply by big cities heat supply network satisfied, reducing work temperature of shell-type heating reactor as far as possible; meanwhile optimized layout of equipment, and organic combination of normal pressure pool in large volume (47) and shell-style heating reactor(29) remove accident possibility of water loss and coldness loss of reactor core (1). Complete inherent safety principle is carried out in the invention. Thus, absolute security of nuclear heating can be guaranteed by using mature pressurized water reactor technology, and enterprises have develop nuclear station pressurized water reactor experience can possibly jump over research and develop stage and enter into nuclear heating market directly, and make a real contribution for energy-saving and emission-reduction and improving country energy structure.

Description

technical field [0001] The inherently safe pool shell combined with the low-temperature reactor nuclear heating station device and its motion program proposed by the present invention belong to the technical field of nuclear energy central heating, and particularly relate to the shell-type low-temperature reactor nuclear heating station that fully implements the principle of inherent safety and can ensure absolute safety. . Background technique [0002] For more than 30 years, extensive development and research work has been carried out on nuclear energy central heating technology in my country, the former Soviet Union, Sweden, Canada, Switzerland, and France. Among them, the most in-depth work is the integrated natural circulation shell-type low-temperature heating reactor. In order to reduce the possibility of water loss in the primary loop of the low-temperature reactor, all primary loop equipment including the core, main heat exchanger, and pressurizer are placed in a l...

AI Technical Summary

Problems solved by technology

Although several safe cooling systems are used in parallel in the nuclear heating station of this reactor, due to the failure to implement the complete inherent safety principle, the probability of core melting accidents can only be reduced by one more than that of nuclear power plant pressurized water reactors. , two orders of magnitude, but the possibility of this accident cannot be completely ruled out

Although the probability of its occurrence is extremely low, once it occurs, the consequences of such an accident in urban areas are completely unacceptable, so it is difficult for this kind of heating reactor to obtain the construction and operation permit issued by the national nuclear safety department

[0006] Second, poor economy

All these reasons have increased the construction investment of the integrated natural circulation shell-type cryogenic reactor nuclear heating station, far exceeding the initial optimistic estimate

[0008] Third, the transportation of huge equipment is difficult

Many northern cities in my country do not have such transportation conditions. In this sense, integrated natural circulation low-temperature reactor nuclear heating stations are also difficult to popularize and apply in my country.

[0010] Fourth, the problem of instability of natural circulation two-phase flow

Therefore, the research and development of nuclear energy centralized heating technology based on the integrated natural circulation shell-type low-temperature heating reactor has actually been at a standstill for many years. If the problems in the above-mentioned background technology are not solved, the development of nuclear energy heating technology will be difficult. get out of the current predicament

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