METHOD OF AND APPARATUS FOR DETECTING BREAKS IN NUCLEAR REACTOR FUEL ROD SHEATHS
Journal Article
·
· Nuclear Eng.
OSTI ID:4289543
A neutron detector is placed near the duct carrying the effluent coolant from the reactor at such a distance from the reactor fuel element that neutron- emitting radioactive substances in the coolant having half-lives not exceeding that of N/sup 16/, and gamma-ray-emitting radioactive substances capable of producing photoneutrons and having half-lives not exceeding that of N/sup 17/ decay to a negligible activity value. Neutrons released in the coolant by the decaying of fission products, which have entered the coolant through a perforation failure in the sheath, are detected in a neutron counter assembly to which an anaplifier and discriminator is attached. When working with heavy water the masking effect of photo-neutron activity is minimized by purification of ihe heavy water, by allowing only a small volume of it near the counter, and by delaying the heavy water in the path from the reactor to the counter.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-13-000490
- OSTI ID:
- 4289543
- Journal Information:
- Nuclear Eng., Journal Name: Nuclear Eng. Vol. Vol: 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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