Study on the efficiency of a central neutron source for the 300-MW(e)-THTR-Nuclear Power Station Schmehausen
Creators
- 1. Hochtemperatur-Reaktorbau G.m.b.H., Mannheim (F.R. Germany)
Description
The loading and starting phase of the THTR-300 is controlled by an external neutron source. The possible positions of this source result from the requirement to fulfil certain criteria concerning the intensity and the interpretation of the detector-signal. In this study it is investigated how far a source centrally inserted into the reactor can be equal to this task and whether it is possible to go over to a non-central position at a later point of time. It is shown that the central source can fulfil all discussed demands. A source position lying in the vicinity of the side reflector demands a special choice of the detector position, which can be exactly determined only by further three-dimensional calculations. Beyond that, this study shows that during the loading phase in the subcritical range the spatial neutron flux distribution is expected to be completely different from that of the critical reactor. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Die Belade- und Anfahrphase der THTR-300 wird mit einer externen Neutronenquelle ueberwacht. Die moeglichen Positionen dieser Quelle ergeben sich aus der Forderung, gewisse Kriterien bezueglich der Intensitaet und der Interpretation des Detektorsignals zu erfuellen. In dieser Studie wird untersucht, inwieweit eine zentral in den Reaktor eingebrachte Quelle dieser Aufgabe gerecht werden kann und ob es moeglich ist, zu einem spaeteren Zeitpunkt auf nichtzentrale Positionen ueberzugehen. Es zeigt sich, dass die zentrale Quelle alle diskutierten Anforderungen erfuellen kann. Eine in der Naehe des Seitenreflektors liegende Quellposition erfordert eine spezielle Wahl der Detektorposition, die sauber nur durch weitere drei-dimensionale Rechnungen ermittelt werden kann. Die Studie zeigt darueberhinaus, dass waehrend der Beladephase im unterkritischen Bereich eine voellig andere raeumliche Flussverteilung zu erwarten ist als bei kritischem Reaktor. (orig.)
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Additional details
Additional titles
- Original title (German)
- Studie zur Untersuchung der Wirksamkeit einer zentralen Neutronenquelle fuer das 300-MWe-THTR-Kernkraftwerk Schmehausen
Publishing Information
- Imprint Pagination
- vp.
- Report number
- Juel--1282
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 7271000
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- EFFICIENCY; NEUTRON FLUX; NEUTRON SOURCES; REACTOR FUELING; REACTOR START-UP; SPATIAL DISTRIBUTION; THTR-300 REACTOR
- Descriptors DEC
- DISTRIBUTION; ENRICHED URANIUM REACTORS; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HELIUM COOLED REACTORS; HOMOGENEOUS REACTORS; HTGR TYPE REACTORS; PARTICLE SOURCES; PEBBLE BED REACTORS; POWER REACTORS; RADIATION FLUX; RADIATION SOURCES; REACTORS; SOLID HOMOGENEOUS REACTORS; THERMAL REACTORS; THORIUM REACTORS
Optional Information
- Notes
- 14 figs.; 7 tabs.; 10 refs. With apps.