SAFETY DEVICE FOR GAS-COOLED NUCLEAR REACTORS
An integral safety device for gas-cooled nuclear reactors is described, comprising gaseous poison under pressure in a small capsule, a Cu--UO/sub 2/ plug which is melted when the neutron flux level becomes excessive, and a chamber which is connected to the capsule and into which the poison gas expands after the plug has melted. This safety device is located in the core in one of the cooling channels. The plug is entirely shielded against thermal neutrons. The shields, e.g., cadmium plates, are placed at a certain distance from the plug. In case of damage of the secondary loop, water fills the coolant channels and the space between the plates and the plug. The fast neutrons that penetrate the plates are then slowed down in the water layer before hitting the surface of the plug. The fission heat of the uranium brings the temperature of the plug to its failure point and the poison is ejected. (H.K.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-004289
- OSTI ID:
- 4755202
- Report Number(s):
- DE 1136026
- Resource Relation:
- Patent File Date: 1959 Jul 11; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Germany
- Language:
- English
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