DETERMINATION OF SPECIFIC NEUTRONIC REACTIVITY
A method is given for production-line determination of the specific neutronic reactivity of such objects as individual nuclear fuel or neutron absorber elements and is notable for rapidity and apparatus simplicity. The object is incorporated in a slightly sub-critical chain fission reactive assembly having a discrete neutron source, thereby establishing a K/sub eff/ within the crucial range of 0.95 to 0.995. The range was found to afford, uniquely, flux- transient damped response in a niatter of seconds simultaneously with acceptable analytical sensitivity. The resulting neutron flux measured at a situs spaced from both object and source within the assembly serves as a calibrable indication of said reactivity.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-022243
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2936274
- OSTI ID:
- 4166678
- Country of Publication:
- United States
- Language:
- English
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Method and apparatus for measuring reactivity of fissile material
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