A Monte Carlo variance reduction approach for non-Boltzmann tallies

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Nuclear Science and Engineering; (United States)

OSTI ID:5036719

Booth, T E ^[1]

---

1. Los Alamos National Lab., NM (United States)

Quantities that depend on the collective effects of groups of particles cannot be obtained from the standard Boltzmann transport equation. Monte Carlo estimates of these quantities are called non-Boltzmann tallies and have become increasingly important recently. Standard Monte Carlo variance reduction techniques were designed for tallies based on individual particles rather than groups of particles. Experience with non-Boltzmann tallies and analog Monte Carlo has demonstrated the severe limitations of analog Monte Carlo for many non-Boltzmann tallies. In fact, many calculations absolutely require variance reduction methods to achieve practical computation times. A description is given of how variance reduction techniques can be applied when non-Boltzmann estimates are desired.

• OSTI ID: 5036719
• Journal Information: Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 116:2; ISSN NSENAO; ISSN 0029-5639
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BOLTZMANN EQUATION
CALCULATION METHODS
COUNTING TECHNIQUES
DIFFERENTIAL EQUATIONS
EQUATIONS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
PARTIAL DIFFERENTIAL EQUATIONS
RADIATION DETECTORS
TRANSPORT THEORY