ANALYSIS OF CONTROL ROD WORTH MEASUREMENTS MADE IN THE HALLAM CRITICAL EXPERIMENT

Technical Report · Sat Apr 15 04:00:00 EST 1961

OSTI ID:4038957

Bost, D S

Data from the measurement of control rod worth in the Hallam Critital Experiment were used to determine the worth of similar rods in the HNPF Core. Two methods of analysis were employed. Using the first method, it was found that the calculation of the thermal worth of a centrally located control rod in the critical assembly did not agree with the measured thermal worth. Since the calculated and measured total worth was in agreement, it was concluded that the epithermal absorption rate in the rods was being overestimated. A revised calculational model was devised to enhance the effect of thermal neutron absorption. This revised model gave reasonable agreement with the measured thermal and total worth and thus was used to determine the worth of the HNPF Control rods. (auth)

• Research Organization: Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
• NSA Number: NSA-15-023083
• OSTI ID: 4038957
• Report Number(s): NAA-SR-Memo-6261
• Country of Publication: United States
• Language: English

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