DE1911637A1 - Mechanical sealing arrangement, in particular for creating barriers for coolant fluid circulating within nuclear reactor pressure vessels - Google Patents

Description

DIPL. ING. DIETRICH LEWAtD

PATENT ADVOCATE

Case 245 / Comm. 706.011 / BBS 51

MUNICH

FÜHSTENBEHGSTRASSE TELEPHONE SOGiH AND (3755 87)

THE

SIAM PROGEQ? !! S.p.A., Milan / ITAXIM

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In many cases, however, this solution is not advisable because the zone is already highly stressed or the possibility of simple dismantling of the "barrel" is required.

According to the invention, a mechanical seal® «» arrangement must be created that is able to create barriers for the Eühiflüasitäten that are within a © ® Circulate pressure vessel of a nuclear reactor.

This is achieved through a series of metallic rings, generally special constructions, arranged alternately with or bistansriagen- simd and swiseliea der fäSiim © nwas3.dung and the ^M 'barrel ^fi «Auieawasa.iiffig imd mrim Kttiilmitteleinlaß« and AuslaBrotaGB,
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The invention is now based on an example !! Embodiment will be explained in more detail with reference to the accompanying drawing. The new arrangement shown in this figure forms one Lock or barrier between the pressure vessel inner wall 1 and the "" barrel "outer wall 2. The lock consists of one Row of metallic piston rings 3, which are arranged alternately with spacers or spacers 4 and on their Seat are anchored by a locking or snap ring 5.

The set of piston rings on the inner housing is blocked, and slides with a certain play on the ä outer cylinder.

According to the invention, among other things, the following advantages are achieved »

- Separation of the sodium streams between inlet 6 and outlet 7 without stressing the pressure vessel wall. (The parallel solution, according to which one would work with labyrinths instead of piston rings, is impossible in practice, because here the construction tolerances too precise for those in question Dimensions would have to be adhered to otherwise unwanted "bypass" of the liquid would use) »

- Ee becomes a relative movement due to thermal expansion possible between pressure vessel and "barrel".

- The most favorable location for the sodium inlet and outlet pipes are selected with a view to the fact that the inlet or outlet pipes in the upper part of the Pressure vessel are arranged, whereby it is prevented in this way that the inlet pipe in the lower part of the pressure vessel attached, which is regarded as unsafe in reactor construction.

009824/1128

- It becomes possible to remove the "barrel" without difficult unscrewing operations to take apart.

With a view to a concise representation, the invention has only been explained briefly on the basis of a single embodiment; everything that was not considered essential was left out. So are the most diverse implementation options given within the scope of the invention.

Claims

009824/1128

Claims (2)

191 * 837 Case 245 CLAIMS 1.) Mechanical sealing arrangement, especially for generation characterized by barriers to the cooling liquids circulating within a nuclear reactor pressure vessel » by a series of metallic piston rings (3) in a special design, which alternate with spacer rings or spacer rings (4) are arranged with the piston rings between the pressure vessel inner wall and the "barrel" outer wall and are arranged between the coolant inlet and outlet pipes * 2.) Mechanical sealing arrangement, in particular for the creation of barriers or barriers for cooling liquids that circulate within a nuclear reactor pressure vessel, essentially as described and illustrated. X-X-X-X-I 009824/1128 Blank page