Method of magnetically removing an irradiated capsule from a burnable absorber rodlet

Patent metadata

Field	Value
Publication number	US-12183473-B2
Application number	US-202318485439-A
Country	US
Kind code	B2
Filing date	Oct 12, 2023
Priority date	Jun 23, 2021
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A method of removing an irradiated capsule from inside of a burnable absorber rodlet. The capsule can contain produced Co-60. The method includes inducing an electromagnetic flux into the capsule to magnetically lock the capsule with a capsule removal module. While locked, the capsule can be relatively moved along a longitudinal axis of the rodlet to remove the capsule from the rodlet.

First claim

What is claimed is:

1. A method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets, the method comprising:
securing, by a rodlet positioning module, a first burnable absorber (BA) rodlet to a rodlet positioning control arm, wherein the rodlet positioning module is supported by the rodlet positioning control arm;
disconnecting, by a cutting module, the first BA rodlet from a burnable absorber assembly, wherein the burnable absorber assembly comprises the plurality of BA rodlets connected by a hold-down plate in an array, and wherein the cutting module is configured to cut the first BA rodlet from the hold-down plate;
positioning, by a BA capsule removal control arm, a BA capsule removal module around the first BA rodlet, wherein the BA capsule removal module is supported by the BA capsule removal control arm;
selecting, by the BA capsule removal module, a first BA capsule of the first BA rodlet for removal, the first BA capsule comprises a ferromagnetic material;
inducing, by the BA capsule removal module, an electromagnetic flux into the first BA capsule, wherein the electromagnetic flux magnetically locks the first BA capsule in parallel with the BA capsule removal module;
leveraging, by the rodlet positioning module, the position of the first BA rodlet relative to the BA capsule removal module, wherein the applied leverage by the rodlet positioning module allows the BA capsule removal module to move the first BA capsule along a longitudinal axis of the first BA rodlet;
aligning, by the rodlet positioning module, the position of the first BA rodlet over a first vacant storage slot in a capsule storage cage; and
depositing, by the BA capsule removal module, the BA capsule into the first vacant storage slot of the capsule storage cage.

2. The method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets of claim 1 , wherein the plurality of BA rodlets comprise a paramagnetic cladding material disposed about an outer surface of each BA rodlet of the plurality of BA rodlets.

3. The method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets of claim 1 , wherein the plurality of BA rodlets comprise a superparamagnetic cladding material disposed about an outer surface of each BA rodlet of the plurality of BA rodlets.

4. The method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets of claim 1 , further comprising controlling the BA capsule removal module by way of a control circuit, wherein the control circuit is manually operated by a technician.

5. The method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets of claim 1 , further comprising controlling the BA capsule removal module by way of a control circuit, wherein the control circuit is automatically operated by a processor, and wherein the processor automatically evaluates feedback responses from the BA capsule removal module, the rodlet positioning module, and the cutting module.

6. The method for removing irradiated burnable absorber capsules from a plurality of burnable absorber rodlets of claim 1 , wherein the first BA capsule comprises Cobalt-60 isotopes.

Assignees

• Westinghouse Electric Co Llc

Inventors

• Heibel Michael D
• Hildebrand Cory

Classifications

• G21G1/02

  in nuclear reactors (by thermonuclear reactions G21B; conversion of nuclear fuel G21C) · CPC title

• G21C23/00

  Adaptations of reactors to facilitate experimentation or irradiation · CPC title

• G21C19/02 Primary

  Details of handling arrangements · CPC title

• G21C19/19

  Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements · CPC title

• G21C7/04

  of burnable poisons (burnable poisons in fuel rods G21C3/326) · CPC title