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Publication

MC21/CTF and VERA-CS Mutiphysics Solutions to VERA Core Physics Benchmark Problems 6 and 7

Publication Type
Conference Paper
Book Title
Transactions of M&C 2017 - International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering,
Jeju, Korea, April 16-20, 2017, on USB (2017)
Publication Date
Conference Name
2017 International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2017)
Conference Location
Jeju Island, South Korea
Conference Sponsor
ANS
Conference Date
-

Abstract

The continuous energy Monte Carlo neutron transport code, MC21, was coupled to the CTF subchannel thermal-hydraulics code using a combination of CASL tools and in-house Python scripts. An MC21/CTF solution for VERA Core Physics Benchmark Progression Problem 6 demonstrated excellent agreement with MC21/COBRA-IE and VERA solutions. The MC21/CTF solution for VERA Core Physics Benchmark Progression Problem 7, Watts Bar Unit 1 at beginning of cycle (BOC) hot full power (HFP) equilibrium xenon conditions, is the first published coupled Monte Carlo neutronics / subchannel T-H solution for this problem. MC21/CTF predicted a critical boron concentration of 854.5 ppm, yielding a critical eigenvalue of 0.99994 簣 6.8E-6 (95% CI). Excellent agreement with a VERA solution of Problem 7 was also demonstrated for integral and local power and temperature parameters.