DD208884A1 - ARRANGEMENT FOR THE INVESTIGATION OF THE METALLIC INTERIOR OF NUCLEAR REACTOR PRESSURE - Google Patents

Abstract

Arrangement for the detailed examination of the metallic inner surfaces of nuclear reactor pressure vessels by means of a combination microscope television camera from a test container. The observation device is moved under the Pruefcontainer over movable brackets against the reactor wall, while in the protected against radioactive radiation inside the Pruefcontainers on the monitor error, error size and Fehlerhaeufigkeit is determined. The transmission into the shielded interior additionally allows the recording of the examination results with photographic equipment.

Description

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Title of the invention

Arrangement for examining the metallic inner surfaces of keraractor pressure vessels

Field of application of the invention

The invention relates to an arrangement for the detailed examination of the metallic inner surfaces of KerareaktordruckgefäSen from a retractable into the nuclear reactor test container, in particular for the unambiguous determination of Pehlerart ·

Characteristic of the known technical solutions

The metallic components in nuclear reactor pressure vessels are subjected to excessive stresses during operation, so that they must be inspected at regular intervals for safety reasons.

It is well known to investigate metallic surfaces by means of microscopes. "Such technical means, even in combination with photographic equipment or television camera, are not applicable for investigations on equipment in the nuclear field of nuclear power plants · Cause is the radioactive radiation)

which hampers the accessibility of the equipment and / or the image of the part viewed at all or at least considerably

It is furthermore known to introduce test units to the nuclear reactor wall from test containers via corresponding wall openings (DB-OS 2,203,406, DD-PS 122 871) In such arrangements, however, it is inevitable that radiation passes occur, which likewise lead to the disadvantages already described ·

Microscopic examinations of the material surfaces in nuclear plants or on a Le borm scale are so far realized by means connected to the microscope optical system · These rigid arrangements are eliminated either because of geometrically unrealisable demands or they require for the construction of extremely complex ancillary equipment «

The aim of the invention - object of the invention is to allow a detailed investigation of the metallic inner surfaces of nuclear reactor pressure vessels according PehlergröBe and Pehlerhäufigkeit, but in particular after Pehlerart with little effort ·

Explanation of the essence of the invention

The invention has for its object to provide an arrangement for meeting the above object, despite the constant Torhandenseins radioactive radiation, the use of microscopes and television cameras, even in

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Combination with Fotoeinrichtungan secures, in which the Peillerstellen determined are reproducible and protects the tester safe from exposure to radioactive radiation.

This object is achieved in that a per se known unit microscope TV camera, which is connected via a cable which is guided through a relatively small opening in the wall, preferably in the bottom of a retracted into the nuclear reactor pressure vessel test container, connected to a monitor, and which can be brought anywhere outside the Prüfeontainer with suitable movable brackets close to the reactor wall, is used.

embodiment

The detailed explanation of the invention is based on the drawing.

On the inner surface of a Semreaktordruckgefäßes 1 places are prone to damage in terms of their Chsrakfars, laga and areal extent to assess.

Purely this task is the Prüfcntainer 2 with the device support plate 3 arranged below, which can be rotated and moved in a vertical direction, used. On the movement mechanism for the device carrier plate 3 will not be discussed in detail. On the equipment support plate 3 are clamping tools 4, which can be moved in the radial direction against the inner surface of the Kerareaktordruckgefäßes 1 available. First, in a clamping tool 4 devices for surface treatment of the later microscopic

used to be considered point. Subsequently, the also held in the manner described unit microscope 6 with lens attachment 7 and television camera 8 is first brought by turning the equipment support plate and then by extending the clamping device 4 in working position. About the adapter 9, the microscope β is connected to the television camera 8. By means of cable 10, the information is transmitted to the monitor 11 set up in the test container 2. From there, the assignment of the device carrier plate 3 and the clamping device and the operation of the on nähmetechnik (6, 7 $ 8). An upstream photographic camera 12 is used to document the television image on the monitor 11 mrd.

The illumination of the field of view of the microscope 6 for the viewing itself and for the previous handling of the devices 5 takes place with that in the movable. Protective tube 13 housed lighting device.14 *

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Claims (1)

Srfindiuigsanspruch Arrangement for inspecting the metallic inner surfaces of nuclear reactor pressure vessels from a test container which can be introduced into the nuclear reactor, characterized in that a unit known per se is a microscope television camera (δ · 7j 8), which is connected by a cable (10) through an opening in the wall, preferably in the bottom of the test container (2) is guided, with a monitor (11) is connected, and outside of the test container (2) with movable support (4) can be brought as close to the reactor wall (1), is used " 1 page, drawings