Recent progress and developments in LWR-PV calculational methodology
New and improved techniques for calculating beltline surveillance activities and pressure vessel fluences with reduced uncertainties have recently been developed. These techniques involve the combining of monitored in-core power data with diffusion theory calculated pin-by-pin data to yield absolute source distributions in R-THETA and R-Z geometries suitable for discrete ordinate transport calculations. Effects of finite core height, whenever necessary, can be considered by the use of a three-dimensional fluence rate synthesis procedure. The effects of a time-dependent spatial source distribution may be readily evaluated by applying the concept of the adjoint function, and simplifying the procedure to such a degree that only one forward and one adjoint calculation are required to yield all the dosimeter activities for all beltline surveillance locations at once. The addition of several more adjoint calculations using various fluence rates as responses is all that is needed to determine all the pressure vessel group fluences for all beltline locations for an arbitrary source distribution.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6521590
- Report Number(s):
- CONF-840902-6; ON: DE85001132
- Resource Relation:
- Conference: 5. ASTM-Euratom symposium on reactor dosimetry, Geesthacht, F.R. Germany, 24 Sep 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARKANSAS-1 REACTOR
NEUTRON DOSIMETRY
PWR TYPE REACTORS
NEUTRON FLUENCE
PRESSURE VESSELS
SURVEILLANCE
CONTAINERS
DOSIMETRY
ENRICHED URANIUM REACTORS
POWER REACTORS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled