Publication details
Neutron and Gamma Spectrometry in the Research Reactor LR-0
| Authors | |
|---|---|
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | IEEE TRANSACTIONS ON NUCLEAR SCIENCE |
| MU Faculty or unit | |
| Citation | |
| Doi | http://dx.doi.org/10.1109/TNS.2015.2429747 |
| Field | Nuclear energy |
| Keywords | He-3 chamber; activation method; LR-0 reactor; neutron and gamma spectra; power distribution; power monitoring; spectrometry; stilbene; VVER mock-up |
| Description | The complex measurement system for the full-scale VVER models (mock-ups), created in the research reactor LR-0, is discussed. Fast neutron (energy from 0.5 to 10 MeV) and gamma spectra are measured in several representative points of the mock-ups by the two-parameter spectrometer with the cylindrical stilbene scintillation detectors. Measurements in the thermal and epithermal neutron region are carried out with the activation method using a broad set of activation monitors and with the He-3(n, p) counter. Activation measurements with threshold fast neutron detectors enlarge also the proton-recoil spectra measurements, such activation measurements are carried out especially in cases, when a spectrometer cannot be put in the necessary position. The core fission rate distribution is obtained by means of gamma-scanning of the fuel pins. The low noise precise power (flux density) monitoring system, independent of the operation control system, was developed in the LR-0 reactor for mock-up experiments. |