Testing of cruciform control rods for BWR/6

Technical Report · Sat Apr 01 04:00:00 EST 1972

OSTI ID:7134157

Fritz, J R

This document presents the results of a thin cruciform control rod (CR) design, development, and test program to determine the minimum fuel channel gap required for reactor service. The experimental results are applicable to BWR/6 and have demonstrated that a reduction in fuel channel gaps from 0.750 to 0.482 inch (uniform gap) is achievable by utilizing a thin cruciform control rod (0.260 instead of 0.312 inches thick). A reference design (0.482-inch gap) test confirmed the adequacy of the thin control rod operating between four fuel channels spaced to simulate end-of-fuel-channel-life operating conditions (DELTAP deflection, etc.). The thin control rod has also been tested in 0.65-, 0.55-, 0.45-, and 0.40-inch fuel channel gaps with maximum dogleg misalignment.

• Research Organization: General Electric Co., San Jose, Calif. (USA). Atomic Power Equipment Dept.
• OSTI ID: 7134157
• Report Number(s): NEDO-10565
• Country of Publication: United States
• Language: English

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