Development of a variable time-step transient NEW code: SPANDEX

Conference · Fri Jan 01 00:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:5884310

Aviles, B N ^[1]

---

1. Knolls Atomic Power Lab., Schenectady, NY (United States)

This paper describes a three-dimensional, variable time-step transient multigroup diffusion theory code, SPANDEX (space-time nodal expansion method). SPANDEX is based on the static nodal expansion method (NEM) code, NODEX (Ref. 1), and employs a nonlinear algorithm and a fifth-order expansion of the transverse-integrated fluxes. The time integration scheme in SPANDEX is a fourth-order implicit generalized Runge-Kutta method (GRK) with on-line error control and variable time-step selection. This Runge-Kutta method has been applied previously to point kinetics and one-dimensional finite difference transient analysis. This paper describes the application of the Runge-Kutta method to three-dimensional reactor transient analysis in a multigroup NEM code.

• OSTI ID: 5884310
• Report Number(s): CONF-930601-; CODEN: TANSAO
• Journal Information: Transactions of the American Nuclear Society; (United States), Vol. 68; Conference: American Nuclear Society (ANS) annual meeting, San Diego, CA (United States), 20-24 Jun 1993; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
FUEL MANAGEMENT
COMPUTERIZED SIMULATION
REACTOR KINETICS EQUATIONS
NUMERICAL SOLUTION
THERMAL ANALYSIS
ALGORITHMS
NODAL EXPANSION METHOD
REACTOR FUELING
REACTOR SAFETY
RUNGE-KUTTA METHOD
THREE-DIMENSIONAL CALCULATIONS
CALCULATION METHODS
EQUATIONS
ITERATIVE METHODS
MATHEMATICAL LOGIC
SAFETY
SIMULATION
220100* - Nuclear Reactor Technology- Theory & Calculation