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What’s the most difficult question you’ve been asked as a maintenance instructor?
Blye Widmar
"Where are the prints?!"
This was the final question in an onslaught of verbal feedback, comments, and critiques I received from my students back in 2019. I had two years of instructor experience and was teaching a class that had been meticulously rehearsed in preparation for an accreditation visit. I knew the training material well and transferred that knowledge effectively enough for all the students to pass the class. As we wrapped up, I asked the students how they felt about my first big system-level class, and they did not hold back.
“Why was the exam from memory when we don’t work from memory in the plant?” “Why didn’t we refer to the vendor documents?” “Why didn’t we practice more on the mock-up?” And so on.
J. Richard Smith, John J. King, J. Wiley Davidson, Morris E. Battat
Fusion Science and Technology | Volume 23 | Number 1 | January 1993 | Pages 51-67
Technical Paper | Blanket Engineering | doi.org/10.13182/FST93-A30119
Articles are hosted by Taylor and Francis Online.
An experiment to measure the multiplication of 14-MeV neutrons in bulk beryllium has been completed. The experiment consisted of determining the ratio of 56Mn activities induced in a large manganese bath by a central 14-MeV neutron source, with and without a beryllium sample surrounding the source. The superior isotropy and flat energy response of the manganese bath gives this detector an advantage over the inhomogeneous and anisotropic detector arrays used in previous experiments for measurements of this type. Values of the multiplication have been obtained for beryllium samples of four thicknesses. The measurements are affected by several systematic effects characteristic of the manganese bath. The values of these systematic corrections are established by a combination of calculation and experimental parameterization. Detailed calculations of the multiplication and all the systematic effects are made by using a highly detailed three-dimensional Monte Carlo geometry model with the MCNP Monte Carlo program. The Young-Stewart and the ENDF/BVI evaluations for beryllium are used in the analysis. Both data sets produce multiplication values that are in excellent agreement with the manganese bath measurements for both raw and corrected values of the multiplication. It is concluded that there is no real discrepancy between experimental and calculated values for the multiplication of neutrons in bulk beryllium.
