News
Events
Conferences
-
SANS-Workshop 21./22. Juni
June 21 - June 22
Seminars
-
Expansion of Research Facilities at the NIST Center for Neutron Research
May 21 14:45 - 15:45
- The NIST Center for Neutron Research (NCNR) has just returned to full-time operation after...
-
Commissioning of the CASCADE detector at MIRA
June 04 14:45 - 15:45
-
Structural and dynamic study of several magnetic systems by means of Neutron Resonant Spin Echo techniques
June 11 14:45 - 15:45
- “ZETA” is a Neutron Resonant Spin Echo (NRSE) option which is currently installed on the thermal...
The irradiation of materials in a research reactor serves many purposes. These include the production of radioactive sources for basic research, activation of samples for neutron activation analysis and industrial applications, such as the production of tracers for the chemicals industry or semiconductor doping. For this reason, FRM II is equipped with a series of irradiation facilities, which allow a flexible range of potential applications both with regard to the available sample volumes and with regard to the achievable neutron fluences.
In principle, the FRM II irradiation service is available to all parties interested either in research or in practical applications. For a customer to be authorised to carry out irradiation, he/she must have a valid handling licence for radioactive substances. In addition, each individual irradiation job will be subject to a safety and handling assessment, including amongother things an activation calculation.
When complete, FRM-II will comprise the following irradiation equipment:
- high flux rabbit irradiation installation (HFRP),
- two standard rabbit irradiation systems (RPA),
- capsule irradiation facility (KBA),
- silicon doping installation (SDA)and
- irradiation position in control rod.
Each of the above facilities has an irradiation insert which is mounted permanently in the moderator tank and may be loaded with samples when the reactor is running. A substantial advantage of these irradiation positions is the availability of a purely thermal neutron spectrum, in which the parasitic generation of undesirable radionuclides by threshold reactions or the occurrence of extended defect clusters through irradiation with fast neutrons is suppressed to the greatest possible extent.
Irradiation Facilities At FRM II
| Facility | Sample Conveying | Thermal Flux | Irradiation Period | Positions | Maximum Sample Size | Packaging |
|---|---|---|---|---|---|---|
| High-flux Rabbit Irradiation Installation (HFRP) | pneumatic (CO2) | 4x1014cm-2s-1 | 0,5 ... 2000s | 1 | 1cm³ | polyimide |
| Standard Rabbit Irradiation System RPA | pneumatic (CO2) | 2x1013cm-2s-1 ... 2x1014cm-2s-1 | minutes ... hours | 1 x 3 | 12cm³ | polyethylene |
| Standard Rabbit Irradiation System RPA | pneumatic (CO2) | 5x1012cm-2s-1 ... 1x1014cm-2s-1 | minutes ... hours | 1 x 3 | 12cm³ | polyethylene |
| Capsule Irradiation Facility KBA | hydraulic (pool water) | 4x1014cm-2s-1 | minutes ... hours | 2 x 5 | 30cm³ | AlMg3 |
| Silicon Doping Installation SDA | mechanic | 2x1013cm-2s-1 | 10 minutes ... 1 day | 1 | Diameter: 4 - 8 inches | - |

