Subcritical TRIGA reactivity measurements using the source jerk technique
Conference
·
OSTI ID:21156984
- University of Texas, Austin, TX (United States)
In a subcritical TRIGA array (used to determine source strength enhancement for neutron radiography), it was necessary to measure the subcritical reactivity {rho} without the use of control rods. The solution was to use the integral 'source jerk' technique, pneumatically driving a 200 microgram californium-252 neutron source out of the subcritical assembly. The steps taken for the measurement were the following: 1) Numerically simulate the TRIGA neutron density n(t) as a function of reactivity {rho} and effective source strength S(t), and generate a flux-dependent function R(T) which is linear with respect to {rho}. 2) Perform the source jerk experiment for different values of {rho}, and using the function R(T), determine {rho}.
- Research Organization:
- TRIGA Reactors, Gulf Energy and Environmental Systems Co., San Diego, CA (United States); Texas A and M University, College Station, TX (United States)
- OSTI ID:
- 21156984
- Report Number(s):
- INIS-US--09N0217; T--739
- Country of Publication:
- United States
- Language:
- English
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