Shutdown Margin Analysis of Chin Shan Cycle 9 Using CASMO-3/SIMULATE-3

Conference · Sun Nov 11 04:00:00 EST 1990 · Transactions of the American Nuclear Society

OSTI ID:6808027

DiGiovine, A. S.; Yang, Jingtong; Lin, D. W.C.

The Taiwan Power Company (TPC) operates two General Electric boiling water reactors (BWR)/4s at the Chin Shan site in Taiwan. During the start-up of unit 1, cycle 9, the technical specification for minimum shutdown margin (SDM) was not met. Investigations demonstrated that TPC's analytical models had been properly used to determine an acceptable loading pattern that met the SDM acceptance criteria. Subsequent investigations led to the conclusion that deficiencies in the analytical models themselves were responsible for the misprediction of SDM. The core loading pattern was then redesigned, and SDM analysis was performed using more accurate analytical models. As a result of the redesign and subsequent reloading of Chin Shan unit 1, start-up was delayed for [approximately] 2 months. Following the recent introduction of the Studsvik core management system (Studsvik-CMS) in Taiwan, SDM predictions for Chin Shan Cycle 9 have been reinvestigated. The objective of the study was to evaluate both the original and revised loading patterns in terms of SDM and to determine the key issues associated with the SDM evaluation.

• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• OSTI ID: 6808027
• Report Number(s): CONF-901101
• Conference Information: Journal Name: Transactions of the American Nuclear Society Journal Volume: 62
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
220900* -- Nuclear Reactor Technology-- Reactor Safety
97 MATHEMATICS AND COMPUTING
BWR TYPE REACTORS
C CODES
CHINSHAN-1 REACTOR
CHINSHAN-2 REACTOR
COMPUTER CODES
COMPUTERIZED SIMULATION
CONTROL ELEMENTS
CRITICALITY
Chin Shan Cycle 9
EIGENVALUES
ENRICHED URANIUM REACTORS
Evaluation
FUEL MANAGEMENT
General Electric Boiling Water Reactors (BWR)
MULTIPLICATION FACTORS
Minimum Shutdown Margin (SDM)
NUCLEAR DATA COLLECTIONS
Nuclear Criticality Safety Program (NCSP)
OPERATION
PHYSICS
POWER REACTORS
REACTOR COMPONENTS
REACTOR CORES
REACTOR OPERATION
REACTOR PHYSICS
REACTOR SHUTDOWN
REACTOR START-UP
REACTORS
Redesign
S CODES
SHUTDOWN
SIMULATION
SPECIFICATIONS
START-UP
THERMAL REACTORS
Taiwan Power Company (TPC)
WATER COOLED REACTORS
WATER MODERATED REACTORS