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Controlling stick, fuel supporting part holder

A technology for control rods and supports, which is applied to reactor fuel elements, climate sustainability, and greenhouse gas reduction, etc., can solve problems such as operator exposure and lengthening operation periods, and achieve shorter time, less exposure, and shorter periodic inspections. effect of time

Inactive Publication Date: 2003-12-10
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, as described above, in the control rod replacement operation using the control rod / fuel support holder, the control rod and the control rod drive mechanism must first be disconnected from the lower side of the nuclear reactor, and then the control rod and the fuel The support is lifted up, so the operation process is divided into two stages, which makes the operation period longer
[0013] In addition, when disconnecting the control rods and the control rod drive mechanism at the base of the lower part of the nuclear reactor, there is a problem that the workers are exposed to radiation.

Method used

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  • Controlling stick, fuel supporting part holder
  • Controlling stick, fuel supporting part holder
  • Controlling stick, fuel supporting part holder

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Embodiment Construction

[0050] Next, a CR·FS holder according to an embodiment of the present invention will be described with reference to the drawings.

[0051] The CR·FS holder of this embodiment is hoisted into the atomic reactor pressure vessel 1 (see Figure 8 ) inside, used to remove the control rods 4 and fuel supports 6 arranged in the reactor core, or to install the control rods 4 and fuel supports 6 from the storage outside the atomic reactor pressure vessel into the reactor core.

[0052] figure 1 and figure 2 It is a longitudinal sectional view showing the schematic structure of the CR·FS holder of this embodiment, figure 1 It's a picture from the front, figure 2 It is a picture viewed from the side. Such as figure 1 and figure 2 As shown, the CR·FS holder of this embodiment includes a main body frame 24, and a separation frame 18 is detachably fixed to the main body frame 24 by mounting bolts 31. The lower part of the frame 18 for separation is provided with a guide member 2...

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PUM

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Abstract

The invention can be used to pull up the control rods and metal device of fuel support for the nuclear reactor simultaneously. In addition, the invented control rods and metal device of position frame for fuel support can relieve the connection between the control rods and the driving mechanism of control rods. This invention has the control apparatus of control rods, which is used to control the hanging-up shaft of the control rods, and the connection relieving apparatus, which is used to relieve the connection state between the control rods and the spud coupling of control rod driving mechanism. In addition, this invention includes the substance frame that can be used to hang and install these three apparatus inside the pressure container of nuclear reactor.

Description

technical field [0001] The present invention relates to a control rod / fuel support holder, and more particularly to a control rod / fuel support holder capable of simultaneously hoisting out control rods and fuel supports in a boiling water reactor (hereinafter referred to as "BWR") Tool. Background technique [0002] Figure 8 It is a longitudinal sectional view showing a part of the inside of the BWR reactor. Such as Figure 8 As shown, inside the atomic reactor pressure vessel 1, a cylindrical reactor core sleeve 2 is provided. Several fuel assemblies 3 are installed inside the reactor core sleeve 2 . In the gaps between the fuel assemblies 3, several control rods 4 that can be lifted and lowered and cross-shaped in cross section are arranged, and the upper ends of the control rods 4 have lifting ears 4d. By raising and lowering these control rods 4, the reactivity of the reactor core can be controlled. [0003] The upper part of the fuel assembly 3 is supported by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/19G21C19/105G21C19/20
CPCG21Y2002/203G21Y2002/304G21Y2004/40G21Y2004/504G21Y2002/202G21C19/20G21Y2004/501G21Y2002/501G21C19/105G21Y2002/402Y02E30/30
Inventor 相马浩一酒卷和雄
Owner KK TOSHIBA
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