Flexible irradiation facility

Patent metadata

Field	Value
Publication number	US-2017316845-A1
Application number	US-201715605711-A
Country	US
Kind code	A1
Filing date	May 25, 2017
Priority date	Nov 25, 2014
Publication date	Nov 2, 2017
Grant date	—

Abstract

An irradiation facility for a nuclear reactor, a method of removing thermal heat from an irradiated object and adjusting an energy distribution/neutron/gamma-ray flux ratio of irradiation, and a product obtainable by the method.

First claim

What is claimed is:

1 . A moveable irradiation facility for a nuclear reactor comprising:
a holder, at least one opening for receiving a sample, and an adaptable filter, wherein the adaptable filter comprises at least one of a band-gap filter, a blocking medium of certain energies, a gamma radiation generator, and combinations thereof, wherein the adaptable filter is for or has at least one of shielding the sample against at least one specific species of neutrons, shielding the sample against at least one species of beta rays, shielding the sample against at least one species of gamma-rays, at least one energy band pass filter for neutrons, at least one energy band pass filter for beta rays, at least one energy band pass filter for gamma rays, and generating of a specific species of gamma-radiation, and wherein a band pass energy of the filter is selected from the group consisting of 0-0.5 keV, 0.5-5 keV, 10-30 keV, 100-200 keV, 250-500 keV, and 0.6-5 MeV, and combinations thereof, and the species is at least one of beta rays, gamma rays, and neutrons, and combinations thereof.

2 . The irradiation facility according to claim 1 , wherein the adaptable filter comprises at least one sheet, wherein the at least one sheet are placed behind one another.

3 . The irradiation facility according to claim 2 , wherein each sheet individually has a thickness, a composition, and an effective thickness, selected for at least one of absorbing at least one specific species of neutrons, absorbing at least one specific species of gamma-rays, absorbing at least one specific species of beta rays, absorbing a pre-determined fraction of said aforementioned specific species, and generating a pre-determined fraction of a specific species of gamma-radiation.

4 . The irradiation facility according to claim 1 , wherein the filter or at least parts thereof are removable.

5 . The irradiation facility according to claim 2 , wherein the sheet material is selected from the group consisting of Pb, Cd, Ni, Sc, Fe+Cr, Fe+Al+S, and Si+Ti.

6 . The irradiation facility according to claim 1 , wherein the filter comprises empty modules, wherein empty modules are filled with an inert material.

7 . The irradiation facility according to claim 1 , further comprising at least one slot for receiving a shield.

8 . The irradiation facility according to claim 1 , wherein an aluminium alloy is used for construction and cladding of at least one shield.

9 . A method of at least one of removing thermal heat from an irradiated object, adjusting an energy distribution, adjusting a neutron ray intensity, and adjusting a gamma-ray intensity, the method comprising the steps of:
providing a radiation source for emitting radiation, and shielding an irradiated object with an irradiation facility according to claim 1 .

10 . The method according to claim 9 , wherein at least one of the following occur: thermal neutrons are absorbed, neutrons with a specific energy distribution are absorbed, gamma rays with a specific energy distribution are absorbed, beta rays with a specific energy distribution are absorbed, and gamma-rays with a specific energy distribution are created.

11 . The method according to claim 9 , wherein excess heat in the object is removed by an external means.

12 . The use of an irradiation facility according to claim 1 , for one or more of the groups consisting of manipulating an energy distribution of radiation species, absorbing neutrons with an energy of less than 5 eV, generating epithermal and fast neutrons, generating high energy gamma-radiation, and generating low energy gamma-radiation.

13 . A product obtained by the method according to claim 9 , wherein the product is selected from the group consisting of 166 Ho-isotope comprising organic molecules, 99 Mo-isotope comprising organic molecules, and 177+177m Lu in an organometallic molecule, and having a specific activity of more than 100 GBq/g isotope.

Assignees

• Univ Delft Tech

Inventors

• Bode Peter
• Denkova Antonia Georgieva
• Wolterbeek Hurbert Theodoor
• Gommers Rene Martin
• Terpstra Baukje Elisabeth

Classifications

• H05H6/00

  Targets for producing nuclear reactions (supports for targets or objects to be irradiated G21K5/08 {; preparation of tritium C01B4/00; targets, e.g. pellets for fusion reactions by laser or charged particles beam injection H05H1/22}) · CPC title

• G21G1/06 Primary

  by neutron irradiation · CPC title

• G21C23/00

  Adaptations of reactors to facilitate experimentation or irradiation · CPC title

• G21G1/02

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

• Y02E30/30

  Nuclear fission reactors · CPC title