1. 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, wherein a band pass energy of the filter is selected from 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. Irradiation facility according to claim 1, wherein the adaptable filter comprises at least one sheet, wherein the at least one sheets are placed behind one and another.

3. 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. Irradiation facility according to any of the preceding claims, wherein the filter or at least parts thereof are removable.

5. Irradiation facility according to any of claims 2-4, wherein sheet material is selected from Pb, Cd, Ni, Sc, Fe + Cr, Fe+Al+S, and Si+Ti.

6. Irradiation facility according to any of claims 1-5, wherein the filter comprises empty modules, wherein empty modules are filled with an inert material, such as a gas, such as nitrogen.

7. Irradiation facility according to any of claims 1-6, further comprising at least one slot for receiving a shield.

8. Irradiation facility according to any of claims 1-7, wherein an aluminium alloy is used for construction and cladding of at least one shield.

9. 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, comprising the steps of

providing a radiation source for emitting radiation, and shielding an irradiated object with a irradiation facility according to any of the preceding claims.

10. Method according to claim 9, wherein at least one of 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. Method according to any of claims 9-10, wherein excess heat is in the object is removed by an external means.

12. Use of an irradiation facility according to any of claims 1-9, for one or more 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. Product obtained by a method according to any of claims 9-11, wherein the product is selected from ¹⁶⁶Ho-isotope comprising organic molecules (such as poly lactic acid) , ⁹⁹Mo- isotope comprising organic molecules, and ^177+177mLu in an organometallic molecule, and/or

having a specific activity of more than 100 GBq/g

isotope .

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