JPS60100093A - Manipulator crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a PWR fuel assembly and a control rod cluster (hereinafter abbreviated as RCC) which is a fuel insert for the fuel assembly.
, Burner Pulse Poison Assembly (hereinafter abbreviated as BPRA), Neutron Source Assembly.

This invention relates to a new type of manipulator crane that can handle all simple plug assemblies (hereinafter abbreviated as P/D).

(Prior art and its problems) Conventionally, the manipulator crane installed in the reactor containment vessel (hereinafter abbreviated as 0/V) of a PWR power plant has However, only the RCC and neutron source assembly in the form of a spy goo could be handled, and the BPRA and P/D, whose superstructure includes a plate and a hold-down bar, could not be handled alone. Therefore, the fuel bits (hereinafter abbreviated as A/B) are removed from the reactor core and loaded into the core while they are in the fuel assembly, and the BPRA and P/]) are removed from the fuel assembly. It is handled on the side using special tools.

Therefore, currently, shuffling of fuel inserts within O7V,
It is not possible to take out or newly load the fuel assembly, and the fuel assembly is once taken out to the A/B fuel pool (hereinafter abbreviated as SFP) for each periodic reactor inspection, and the fuel inserts are shuffled. However, the above-mentioned fuel removal and reloading into the C/V takes several days, which is a problem in terms of shortening periodic inspections, and it is desired that the handling work be completed only within the CZV. There is.

As a supplement to the above explanation, the current fuel interpolant RCo,
The BPRA, neutron source assembly, and P/D are shown in FIGS. 1 to 4, respectively. In Figure 1, 1 is a control rod, 2
In Figure 2 (a) and (b), 3 is a simple plug, 4 is a burner pull poison, 5 is a hold down bar, 6 is a hold down spring, 7 is an end plate, (b) is (a) In the A-A cross-sectional view of Figure 3 (A) and (B), 8 is the seventh-order neutron source.

4 is Burnapul Poison, 3 is Simple Plug.

8 is a /order neutron source, 9 is a secondary neutron source, (a) is an A-A sectional view of (b), and in Figure 4 (a), 3 is a simple plug, 7 is an end plate, and 6 is a A hold-down spring, 5 is a hold-down bar, and (B) is a top view of (A).

(Structure and Embodiments of the Invention) The manipulator crane of the present invention has been developed in view of the above points, and is characterized by the fact that in the manipulator crane, the guide plate for drawing in the fuel insert at the tip of the inner mast has a B. By providing a cutout for the hold-down bar of PRA and P/D, in addition to the ROO and neutron source assembly that can be handled conventionally, it can be used for BPRA with a spider-shaped handling head, and P/D. The structure has been designed to enable easy handling.

An actual fM example of the manipulator crane of the present invention is shown in FIG. 5, and its operating state in a nuclear reactor is shown in FIG. 6 for explanation.

As shown in FIG. 5, the manipulator crane has a bridge 10. Trolley 11. and the mast 12 (outer mast 13. inner mast) 14) attached to the trolley.
It consists of a control device 15 etc. on the lower. The mast is an outer mast 13 fixed to a trolley 11; a fuel assembly 1 attached to an inner mast 14 that moves up and down within the outer mast;
6 grapple 17. It consists of a fuel insert grapple (control rod grapple) 18, etc. Note that 19 is an insert guide plate.

FIG. 6 is a simplified explanatory diagram showing the operating state of the already mentioned manipulator crane 40 in the reactor containment vessel CZV.
16 is a fuel assembly, and 20 is a reactor core. The right hand side of the figure is a simplified explanatory diagram showing spent fuel assemblies in fuel pit A/B being processed into storage pit 30 by bridge crane 50.

To handle fuel and fuel inserts, after moving the bridge 10 and trolley 11 so that the mast 12 is located directly above the object, the inner mast 14 is extended downward and the handling head of the object is moved. Grip with the grapple at the tip of the inner mast 14.

As shown in FIG. 7, the fuel assembly 16 raises the inner mast 14 and moves the manipulator crane to a predetermined position while being accommodated in the outer mast 13. Note that 17 is a fuel assembly grapple.

The fuel insert is attached to the inner mast 14 as shown in FIG.
After raising the internal insert grapple 18 and storing the fuel insert 21 in the inner mast 14, the inner mast 14 is stored in the outer mast 13. At this time,
In order to prevent the rod of the spider-shaped fuel insert 21 from becoming irregular, a guide similar to the spider part of the fuel insert as shown in FIG. 9 is attached to the tip or inside of the inner mast 14. Each rod is drawn into the inner mast 14 through its guide, and the tip of the rod is held by the guide portion. In addition, 19 is the insert guide plate.

However, as mentioned above, with the current fuel interpolation, BPRA
Since the handling head of the P/D is plate-shaped, it cannot be handled by a manipulator crane.

Therefore, in the present invention, we first developed B.
The structure of the upper handling head of PRA and P/D is modified as shown in FIG. 11, 101ffl. In addition, Fig. 10 and Fig. 11 are BP1'L.
This is shown for A△. In the figure, the hold-down bar 5 needs to be left in place because the existing handling system is used.

Furthermore, as shown in FIG. 12, the guide plate 19 at the tip of the inner mast 14 has a notch 22 corresponding to the spider structure of the fuel insert and a notch corresponding to the hold-down par 5. It is characterized in that a portion 23 is provided.

(Effects of the Invention) The manipulator crane of the present invention has B PRA on the guide plate for drawing in the fuel insert in the inner mast.
, Since a notch was provided for the holder down bar of the P/D, it was possible to handle the PERA and P/D in addition to the RcC1 neutron source assembly, which could be handled conventionally, which was a major effect. It is.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams explaining the shape of the current fuel insert. Figure 1 is a side view of the ROO, Figure 2 is a side view of the BPRA (A), its A-A sectional view (B), and Figure 3 is a side view of the BPRA. The figure shows a side view of the neutron source assembly (A) and its A-A cross-sectional view (Fig. 4). An explanatory diagram of an example structure, Fig. 6 is an explanatory diagram of the operation state of the manipulator crane in the nuclear reactor, Fig. 7 is a diagram of the fuel assembly handling state, and Fig. 8 is a diagram of the fuel insert handling state. An explanatory view of the inner mast fuel insert guide part, Fig. 10 is a side view of <BPRA based on the present application. Fig. 11 is a view taken along the arrow A-A' of Fig. 1O, and Fig. 12 is based on the present application. It is an explanatory diagram of the guide plate of the inner mast. 1... System '14 In, 2... Spider, 3...
Simple plug, 4...Burnapul poison, 5...
・Hold-down bar, 6... Hold-down spring, 7-0° end plate, 8... -order neutron source, 9...
Secondary neutron source, 10... Bridge, 11... Trolley, 12... Mast, 13... Outer mast, 1
4... Inner mast, 15... Control device, 16.
...Fuel assembly, 17...Fuel assembly grapple, 1
8... Fuel insert grapple, 19... Insert guide plate, 20... Core, 30... Pit, 4
0... Manipulator crane, 50... Bridge crane, 21... Fuel insert, 22... Notch corresponding to spider structure, 23... Corresponding to hold down bar part Notch part.

Claims (1)

[Claims] B. In a manipulator crane that handles fuel assemblies inside the reactor containment vessel, a cutout for the hold-down nozzle of the burner pull poison assembly and simple plug assembly is installed in the guide plate for drawing in the fuel insert in the inner mast. In addition to the control rod cluster and neutron source assembly that could be handled conventionally,
A manipulator crane 0 characterized in that the handling head part has a snowyder structure and is capable of handling the burner pull poison assembly and the simple plug assembly.