Published August 8, 1974 | Version v1
Patent Open

Equipment for the localisation of failed fuel elements

Creators

Description

The equipment uses the detection of fission product contamination of the coolant to localize failed fuel elements. For this, samples are taken from the coolant flow, e.g. liquid sodium, using fixed and movable receivers. The movable receivers are attached to connecting pipelines and form one unit together with a revolvable mesh-formed plate, the sector selector. The connecting pipelines are led to the periphery of the sector selector and are placed there opposite to fixed arranged pipes. The fixed receivers are atttached to further pipelines which, like the other pipelines, are connected via a magnetic valve to a switch-over device with control of the coolant contamination. To accurately localize the failure, the sector selector is moved in steps of 300, and the surface section in which the failed fuel rod lies is systematically determined by means of the revolvable mesh plate. (DG)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Die Einrichtung benutzt zum Lokalisieren defekter Brennelemente den Nachweis der Spaltproduktkontamination des Kuehlmittels. Dem Kuehlmittelstrom, z.B. fluessigem Natrium, werden hierzu mittels feststehenden und bewegbaren Aufnehmern Proben entnommen. Die beweglichen Aufnehmer sind an Verbindungsleitungen angeschlossen und bilden mit einer drehbaren, gitterfoermigen Platte eine Einheit, den Sektorwaehler. Die Verbindungsleitungen sind an die Peripherie des Sektorwaehlers gefuehrt und stehen dort fest angeordneten Rohrleitungen gegenueber. Die feststehenden Aufnehmer sind an weiteren Rohrleitungen angeschlossen, die wie die anderen Rohrleitungen ueber Magnetventile an eine Umschalteinrichtung mit Ueberwachung der Kuehlmittelkontamination geschaltet sind. Zur genaueren Lokalisierung des Defekts wird der Sektorwaehler in 300-Schritten bewegt und mittels der drehbaren Gitterplatte systematisch der Flaechenabschnitt ermittelt, in dem der defekte Brennstab liegt. (DG)

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Additional details

Additional titles

Original title (German)
Einrichtung zum Lokalisieren defekter Brennelemente

Publishing Information

Imprint Pagination
13 p.
IPC:
Int. Cl. G21c,17/06; German (F.R.) Cl. 21g,21/31.
IPC
Int. Cl. G21c,17/06; German (F.R.) Cl. 21g,21/31.
Patent number
DE patent document 2305327/A/

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7271110
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S42: ENGINEERING;
Descriptors DEI
CONTAMINATION; COOLANTS; FAILED ELEMENT DETECTION; FAILED ELEMENT MONITORS; FISSION PRODUCTS; FUEL ELEMENTS; LEAKS; NONDESTRUCTIVE TESTING; SODIUM COOLED REACTORS
Descriptors DEC
ISOTOPES; LIQUID METAL COOLED REACTORS; MATERIALS TESTING; RADIOACTIVE MATERIALS; REACTOR COMPONENTS; REACTORS; TESTING

Optional Information

Notes
3 figs.