KR910001803A - Shield structure and shielding method of internal structure for annealing reactor vessel - Google Patents

Abstract

No content

Description

Shield structure and shielding method of internal structure for annealing reactor vessel

Since this is an open matter, no full text was included.

1 is a perspective view illustrating the relative position of a containment vessel of a nuclear reactor, in particular a reactor vessel and embedded internal structure,

2 is a perspective view illustrating a support structure for a vertical tank according to the invention, in particular a tank of square section (shown as a false line) inserted inside the support structure.

4 is a plan view of a vertical and horizontal tank disposed in place;

FIG. 5 is a side cross-sectional view disposed in place taken along line 5-5 of FIG.

Claims (16)

A structure for shielding an embedded structure from a reactor vessel housed in a containment building, comprising: (a) an embedded interior disposed between the vessel and the embedded structure as a nuclear reactor and introduced through the instrument inlet of the containment building; First means for shielding radiation radiating from the structure: and (b) second means for shielding radiation from the embedded internal structure, which is disposed in the embedded internal structure and can be introduced through the instrument panel inlet Structure for shielding the internal structure built from the reactor vessel comprising a. 10. The structure of claim 1, wherein each of the first and second means is a plurality of tanks filled with relatively rigid water. 10. The structure of claim 1, wherein each of the first and second means is a plurality of substantially solid tanks. 10. The structure of claim 1, wherein each of the first and second means is a tank filled with expandable water. 2. The structure of claim 1, comprising means for supporting at least a first means to shield radiation. A structure for shielding radiation emitted to an embedded internal structure, comprising: (a) a plurality of vertical tanks filled with water disposed adjacent to the embedded internal structure; and (b) the embedded internal structure is placed above the vertical tank filled with water. A radiation shield of the embedded internal structure of the reactor vessel, characterized by comprising a plurality of horizontal tanks filled with water disposed therein. 7. The radiation shield structure of claim 6, wherein each tank has a substantially square cross section. 7. The radiation shield structure of an embedded internal structure of a reactor vessel according to claim 6, comprising means for supporting a plurality of vertical tanks. 9. The radiation shield structure of claim 8, wherein the support means is a second upper grid connected by a first lower grid and an intermediate support. 10. The radiation shield structure of claim 9, further comprising a drip pan below the support means. A method for shielding an internal structure of a reactor vessel housed in a containment building, the method comprising: (a) introducing first and second means into the containment building to shield radiation emitted from the internal structure installed in the reactor vessel: (b) disposing a first means between the reactor vessel and the internal structure installed therein; And (c) disposing a second means over the inner structure. CLAIMS 1. A method for shielding an internal structure from a reactor vessel, the method comprising: (a) introducing first and second filled tanks with a plurality of water through an instrument inlet of a containment building containing the reactor; (b) disposing a plurality of first tanks vertically between the reactor vessel and the embedded internal structure; And (c) horizontally arranging the plurality of second tanks above the plurality of first tanks with the embedded internal structure. A method for shielding embedded internals for reactor vessel annealing, the method comprising: (a) removing nuclear fuel from the containment vessel building of the reactor: (b) removing the upper and lower core internals from the water in the fuel replacement storage zone. (C) Assembling the support structure by the fuel exchange kernel between the reactor vessel and the embedded internal structure: (d) Introducing a number of vertical shielding tanks individually through the appliance inlet of the containment vessel and Placing each as a support structure: (e) individually introducing a plurality of horizontal shielding tanks through the appliance inlet of the containment building and placing each above the embedded internal structure and the plurality of vertical shielding tanks: (f) draining from the fuel replacement canal to the flange level of the reactor vessel: (g) placing the annealing device in the reactor vessel: (h) reactor Pumping the remaining water from the vessel: and (i) annealing the vessel to the reactor. 14. The method of claim 13, wherein step (f) precedes disposing a plastic cover for the plurality of vertical and horizontal tanks. 15. The method of claim 14, further comprising: (j) filling the vessel with water; (k) removing the annealing device; (l) removing the plastic cover from the plurality of vertical tanks; (m) overflowing the fuel replacement canister. (N) removing the plastic cover from the plurality of horizontal shielding tanks; And (o) removing contamination of the vertical, horizontal tank and support structures. 16. The method of claim 15, comprising: (p) removing vertical, horizontal tanks and support structures from the containment building. ※ Note: The disclosure is based on the initial application.