Three-stage carrier for gamma irradiation and gamma irradiation method using three-stage carrier

• US 10,475,545 B2
• Filed: 10/21/2016
• Issued: 11/12/2019
• Est. Priority Date: 11/16/2015
• Status: Active Grant

• Current Assignee: Greenpia Technology Inc.
• Original Assignee: Greenpia Technology Inc.
• Inventors: Kim, Kwansoo, Kim, Kwanghoon, Kim, Soojin, Lee, Hoochul, Eom, Yongwoon
• Primary Examiner(s): Smith, David E
• Application Number:
  US15/775,684
• Publication Number:
  US 20180358143A1
• Time in Patent Office: 1,117 Days
• CPC Class Codes: A61L 2/08 Radiation
• CPC Class Codes: A61L 2/081 Gamma radiation
• CPC Class Codes: A61L 2/24 Apparatus using programmed or automatic operation
• CPC Class Codes: G21K 5/08 Holders for targets or for other objects to be irradiated
• CPC Class Codes: G21K 5/10 with provision for relative movement of beam source and object to be irradiated

Abstract

A three-stage carrier is transported to an irradiation room by transporting means and is irradiated with gamma ray sources installed on ray source rack such that a product loaded therein is treated. The three-stage carrier includes a central container in a center of the three-stage carrier; an upper container formed on the central container; and a lower container formed under the central container. Here, the central container, the upper container, and the lower container are partitioned by septum, a height of the three-stage carrier is greater than a height of the ray source lack, and the central container has a height greater than a height of the upper container or a height of upper container. The better quality stability through uniform sterilization and the improved energy utilization efficiency and productivity, the reduction of cost may be achieved.

Claims

1. A three-stage carrier transported to an irradiation room by transporting means and irradiated with gamma ray sources installed on a ray source rack such that a product loaded therein is treated, the three-stage carrier comprising:

a central container in a center of the three-stage carrier;

an upper container formed on the central container; and

a lower container formed under the central container,

wherein the central container, the upper container, and the lower container are partitioned by septums;

a height of the three-stage carrier is greater than a height of the ray source rack; and

the central container has a height greater than a height of the upper container or a height of the lower container.

2. The three-stage carrier of claim 1, wherein a drawer or a mesh pallet is housed in each of the containers.

3. The three-stage carrier of claim 1 further comprising:

a double-sided opening-and-closing type door coupled to both front side of the three-stage carrier by hinges; and

a bracket coupled to an upper end of the three-stage carrier,

wherein a moving wheel is connected to the bracket such that the three-stage carrier is guided by a lower rail provided on a lower side of the three-stage carrier and movable along an upper rail provided on the upper side of the three-stage carrier.

4. A gamma irradiation method using the three-stage carrier of claim 1, the gamma irradiation method comprising:

moving the three-stage carrier having a height greater than a height of a ray source rack; and

irradiating the product with a gamma ray,

wherein a product loaded in the central container has a gamma ray irradiation effect of a source overlay; and

a product loaded in the upper and lower containers has a gamma ray irradiation effect of a product overlay.

5. The gamma irradiation method of claim 4, wherein a product requiring high dose irradiation is loaded in the central container,

wherein a product requiring maintenance of uniformity of sterilization effect is loaded in the upper and lower containers;

the high dose irradiation is performed to the central container and the low dose irradiation is performed to the upper and lower containers when the three-stage carrier is transported to the irradiation room and is irradiated with the gamma ray sources; and

several types of products with different dose requirements are simultaneously irradiated.

6. The gamma irradiation method of claim 4, wherein a height of the product loaded in the upper container is lowered to be irradiated with uniform dose.