The Dynamic Reactivity Interpretation of Pulsed Neutron Measurements
Journal Article
·
· Nuclear Science and Engineering
OSTI ID:4254808
- Knolls Atomic Power Laboratory (KAPL), Schenectady, NY (United States)
A dynamic reactivity, not the reactivity in general uses is defined relative to prompt critical as oy melts below K = -l alpha, where alpha is the asymptotic (prompt) flux decay rate observed in a pulsed neutron experiment, and 1 is the prompt generation time of that same reactor made prompt critical by uniform subtraction of l/v poison. The dynamic reactivity coalesces near critical with the conventional perturbation reactivity impacting v/v. The dynamic reactivity is physically interpretable as the amount of uniform l/v poison whose removal would result in criticality, times the conventional reactivity coefficient of that poison in the critical reactor. The quantity 1 has the physical significance of the average time taken by a neutron to cause a fission in the steady state prompt critical reactor; 1 is also the reactivity coefficient just mentioned.
- Research Organization:
- Knolls Atomic Power Laboratory (KAPL), Schenectady, NY (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AC12-76SN00052
- NSA Number:
- NSA-13-014910
- OSTI ID:
- 4254808
- Journal Information:
- Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Vol. 5; ISSN 0029-5639
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
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