DE2361666C2 - Nuclear reactor plant with shut-off valves on both sides of a pressure chamber wall - Google Patents

Description

or by a correspondingly reinforced design

(Steel or prestressed concrete design of the containment itself) the loads from external Influences has grown. To ensure that the pressure is reduced in the event of a pipe break,

The invention relates to a nuclear reactor plant with half the pressure chamber, but within the safety unit the unitary container surrounding the reactor pressure vessel, this piece of pipe can with Pressure chamber and one of the pressure vessel through the second shut-off device in the invention of the pressure chamber through to the outside of a pressure-tight chamber or a pressure-tight Pipeline, the pressure chamber being surrounded by a 40 channel, which then goes up immediately Security container is surrounded, which in turn extends to the wall of the security enclosure and The pressure chamber closes practically tightly over the underwater opening. The pipelines connected is. The chamber or the channel can either be connected to sufficiently large pressure equalization openings with the prevent radioactively contaminated media from reaching the actual pressure chamber space or via a penetrate outside, the pressure vessel is in its own opening in the form of a pipe or a Arranged safety container, which in turn in the channel with the water of the water reservoir and from The situation is that the vapors escaping in the event of a leak there with the space of the condensation chamber and to catch uase. Be connected to this security container volume, or it can also be a ter on the one hand not to have to make too large and 50 combination of outflow openings both for on the other hand, the container possibly in the safety pressure chamber and directly to the water reservoir to limit occurring pressure are to be chosen.

Nuclear reactor plants with one of the reactor pressure An embodiment is shown in the drawing

container surrounding pressure chamber provided. The posed. Only those for the Pressure chamber is indicated by essential parts that are underwater. The who openings with a pressure vessel 1 containing fuel elements inside the containment

surrounded by a pressure chamber 2. Below the pressure chamber 2 there is a pipeline

_ .., - - ". channel 5. From the pressure chamber and from the pipe

Condensation pipes 6 lead to condensation pipes 6 from the unit for a relatively low pressure ^ can be laid ^. ^ Eme such an arrangement is below and protrude into one filled with water 7 / ™ ™ ".,. ... into the space in the safety container 8. From the

Inside the pressure vessel 1, a pipe 9 leads to the outside. Both sides of the pressure chamber

.. »« »υ uwo kjivuviijwijuniaiioj a

lying room connected. When the water flows through, the escapes in the event of damage Vapors largely condensed, so that the safety

z. BJn of DT-OS 20 23 343 described.

In the solutions previously provided with two "~ ^{: Ι} ~~ switched shut-off valves, this will be

in series _ ^ ^ .., "^ w .. ^. ^"., χο,.,., ν.-

second shut-off device always outside the safety wall between pressure chamber 2 and pipe container arranged and ensuring the channel 5 is a shut-off valve 3 and 4 is provided.

Characterized in that the shut-off valve 4 located outside the pressure chamber wall is inside

Function of the pressure reduction system in the event of a pipe break between the inner and outer

of the containment 8 is located in front of or behind the shut-off valve in the event of a pipe break two barriers against outwardly emerging Fumes. One barrier is represented by the security container 8, while the second barrier through the shut-off valve 3 arranged within the pressure chamber 2 and through the pressure chamber wall or is formed by the wall of the pipeline channel S.

List of reference symbols

1 pressure vessel

2 pressure chamber

3 Abspei iveniii

5 pipeline channels!

6 condensation tubes

7 water

8 security containers

9 pipeline

1 sheet of drawings

Claims (2)

/ ι Patent claims: shut-off device brought about by the fact that the pressure chamber wall around the point of the pipe passage with the wall of the containment »J -.- Γ- * T * 'l' A'.rifO * J iiciTtlrt TVIIlR AtC 111 On-U ~ 11 - VerUUnUCIl IM. i »-» uitlvi "" »" t · ■ · - · »*» ^.> uuuvmaiu 5 of the safety container lying shut-off device to protect against destruction by external influences with a corresponding additional structure. The object of the present invention is to provide a P rr f ■ - · 1 · Li _ ti. 1. No alarm system with one of the reactor pressure vessels surrounding pressure chamber and a pipeline leading from the pressure vessel through the pressure chamber to the outside, wherein the pressure chamber is surrounded by a safety container, which in turn to meet with the pressure chamber above submerged 10 arrangement, which makes it possible, even when Orifices are connected, thereby indicating a break in the pipeline outside the pressure chamber, that the reactor pressure wall creates an additional, second barrier against the discharge container (1) pipeline leading to the outside to enter radioactively contaminated media (except the both sides of the pressure chamber wall shut-off by the pressure chamber wall and within the Valves (3 and 4) are built in and there are also 15 pressure chambers to create the barrier located outside the pressure chamber) without the need for an additional safety valve (4) Inside the containment structures to protect against external influences (8) located. gen are necessary. 2. Nuclear reactor installation according to claim 1, this object is achieved in the initially ge characterized in that the outside of the 20-mentioned nuclear reactor plant according to the invention there-pressure chamber lying shut-off valve (4) inside that in the from the reactor pressure vessel after half of the containment (8) from an outside pipeline on both sides of the Pipeline channel (5) is surrounded, which also pressure chamber wall shut-off valves are installed over underwater (7) openings (cone and that also the outside of the pressure chamber liedensationsrohre 6) with the interior of the 25 lowing shut-off valve inside the safety container connected is. ters lies. In the invention, the second shut-off valve is arranged within the safety container, which in turn is either protected from external stress by an additional structure