DD278670A1 - REAKTORSICHERSTELLUNGSSYSTEM FOR HAVARIA IN CORE POWER STATIONS - Google Patents

Abstract

The reactor safety system for nuclear power plant accidents can be applied to all reactor types and has been developed especially as a safety system for severe reactor accidents and as a combined intermediate storage facility for activated and contaminated substances. According to the invention, below a reactor there is a closable transport shaft provided with guiding devices, which is dimensioned according to mass and geometry of the parts to be transported and in inclined design a connection to the underground and outside the reactor building located security depot with integrated or connected Zwischenlagerstaette for activated and contaminated substances manufactures. The security depot and the transport channel are flooded with an activity- and reactivity-inhibiting medium.

Description

For this 1 page drawing

field of use

The reactor safety system can be applied to all reactor types and has been developed especially as a safety system for severe reactor accidents and as a combined intermediate storage facility for activated and contaminated substances.

Characteristic of the known state of the art

All previously known solutions are based on an additional hermetically sealed on all sides radiation-proof enclosure. The existing protection systems and containment systems only have a temporally and disturbance-specific limited effectiveness, as a result of which a high level of damage to humans and the environment is not excluded.

In addition, for all known systems, the negative effects for the entire system can not be averted, d. H. the systems are no longer reusable. Even for the shutdown of a nuclear reactor so far no cost-effective and at the same time radiation-safe disassembly solutions are known, and in the case of a nuclear accident, the reactor dismantling is currently considered impracticable, which means an unused standstill for years for all reactor. (DE 3631018, DE 3724670, DE 3628855, DE 3708243, DE 3709315)

Object of the invention

The aim of the invention is the development of a system for securing the reactor, in particular for heavy reactor accidents in nuclear power plants, which minimizes the consequences of accidents for people and the environment and the entire system and allows reuse and reconstruction of the entire system. The recovery and maintenance costs are to be reduced.

Explanation of the essence of the invention

The invention has the object of developing a reactor safety system for accidents in nuclear power plants with additional safety in emergency situations.

According to the invention, this object is achieved in that there is provided below a reactor with Leitvorrichtungen provided closable transport shaft, which is dimensioned by mass and geometry of the parts to be transported and inclined design a connection to the subterranean and outside the reactor building located security depot with integrated or connected Intermediate storage facility for activated and contaminated substances. The security depot and the transport channel are flooded with an activity- and reactivity-inhibiting medium.

The reactor containment system includes separation points attached to the reactor, the location of which depends on the reactor design as well as the geometry, mass and requirements of the parts to be landfilled, a closable transport shaft below the reactor and a damping and closure flap at the junction to the safety depot. Above the security dock there is a lock with a salvage and disposal channel, which serves at the same time for the introduction of intermediately stored substances, and moreover establishes a connection to the connected or integrated intermediate storage facility for activated and contaminated substances. The single or multi-chamber safety depot is equipped with a radiation shield, disposal systems, a cooling circuit with waste heat recovery, mobile and stationary monitoring equipment and salvage equipment. In the lock there is a manipulator, which performs the necessary work in the security depot, interim storage and disposal channel. Security depot, intermediate storage and disposal channel form a hermetically sealed unit, wherein at the upper end of the Enlsorgungskanals an additional hermetic conclusion is realized. In the application, by reaching the tripping parameters by means of the tripping and separating system, parts of the reactor construction and of the fuel are transported out of the reactor into the transport chute, cooled by the activity- and reactivity-inhibiting liquid, whereby the chain reaction is reliably prevented, via guiding devices into the sliding or Abrollago brought and get over the damping and closure flap in the security depot. After passing the ejected parts immediately the damping and closure flap sowio the transport shaft ceiling are closed and after the required cooldown, during which the activity and reactivity-inhibiting liquid is cooled using emerging waste heat, the disassembly and recovery of the parts by means of a universal manipulator ,

The connected intermediate storage facility will continue to operate during the decay and disassembly time as well as being used for the interim storage of disassembled and salvaged parts.

exemplary

The invention will be explained in more detail with reference to an embodiment. FIG. 1 shows the reactor safety system with connected intermediate storage facility for activated and contaminated substances. Defined separation points 3 of the safety enclosure 1 located in the reactor 2 lead in internal explosions in the reactor 2 or by triggering trigger mechanisms provided for separating the pressure vessel or vascular-less reactors of the bottom construction and hydraulic, pneumatic, electrical, explosive or gravitational ejection of the fuel and 5 has dimensions which allow the ejected parts to pass safely, guide rails 6 which secure the sliding or unrolling position and a sloping shaft part which prevents unrolling or slide the parts to the underground, located outside of the reactor building and as Zwischenlagei ¹ IiUr activated and contaminated materials used Si ^ herheitsdepots 9 ensured. Shaft 5 and security depot 9 are filled with an activity- and reactivity-inhibiting medium 7, which takes on the tasks of moderation, cooling and damping, and separated by a flap 8 for damping and safe enclosure of the activity inventory.

One or more single or multiple barriers 4 of one-piece and multi-part shut-off elements in the shaft 5 additionally ensure a secure spatial separation of safety enclosure 1 and security depot 9 and the location of the activity inventory in the security depot 9 after the accident. The security depot 9 has radiation shields, disposal systems , a cooling circuit with waste heat recovery 10, a lock 13 for inspection, disassembly and salvage work, which also serves to introduce activated and contaminated substances in the connected or integrated storage 11, in which solid and liquid waste products can be stored and a Disposal channel 14, which also serves for driving, introduction and recovery, which is hermetically sealed with the lock 13 in conjunction and has sufficient dimensions and facilities for the transport of the elements to be introduced or auszubringenden.

Furthermore, mobile and stationary monitoring devices and a manipulator 12, which takes over the transport of activated and contaminated substances in the intermediate storage 11, as well as for salvage, disassembly and inspection work in the security depot 9 on or can be implemented required.

Claims (4)

claims: 1. Reaktorsicherstellungssystem for accidents in nuclear power stations, characterized by a triggering and separation system (3), a closable (4), with guide devices (6) provided in inclined execution applied, hermetically sealed transport shaft (5) via a damping and Closure flap (8) is connected to a hermetically sealed security depot (9), wherein the transport shaft (5) and the underground, located outside the reactor building security depot (9) flooded with an activity and reactivity-inhibiting liquid (7) and with a cooling system with waste heat recovery ( 10), the security depot (9) being connected to a hermetically sealed intermediate deposit (11) for activated and contaminated substances and to a lock (13) having a manipulator (12) with a hermetically sealed, passable salvage and disposal channel (14) is in communication. 2. Reaktorsicherstellungssystem according to claim 1, characterized in that the security depot (9) in single or multi-chamber design for receiving one or more damaged reactors with one or more transport shafts (5) is in communication and is equipped with mobile and stationary monitoring devices. 3. Reactor safety system according to claim 1, characterized in that in the lock (13) existing manipulator (12) can be equipped as salvage, disassembly and inspection device and as a facility for introducing activated Ui d contaminated substances in the intermediate storage site (11) serves. 4. Reactor safety system according to claim 1, characterized in that the transport shaft (5) is dimensioned in its design and arrangement by reactor type and / or transported parts.