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Optimization of dynamic terms in core overtemperature delta-T trip function

Technical Report:

Abstract

The characteristics of the core overtemperature Delta-T (OT Delta-T) dynamic terms are investigated for various time constants. In addition, the effects of the dynamic terms on the OT Delta-T trip setpoint in case of the uncontrolled RCCA bank withdrawal at power transient are studied by using the NLOOP and the PUMA code. Based on the above study, the procedure in determining the optimal dynamic term is suggested and the time constants of the OT Delta-T dynamic terms are optimized for the KORI 3 and 4 transition core. It reveals that the most improtant one in the OT Delta-T dynamic terms affecting the minimum DNBR thorugh the system transient is the vessel average temperature lead-lag term, and the optimized time constants are 21 seconds for lead and 4 seconds for lag. By this optimization, the core operation region is expected to be improved without changing the core safety limits. (Author).
Authors:
Park, Jin Ho; Yoo, Hyung Keun; Um, Kil Sup; Kim, Hee Cheol; Lee, Jong Chul [1] 
  1. Korea Atomic Energy Research Inst., Daeduk (Korea, Republic of)
Publication Date:
Mar 01, 1991
Product Type:
Technical Report
Report Number:
KAERI/RR-984/90
Reference Number:
SCA: 220400; PA: AIX-23:014945; SN: 92000646928
Resource Relation:
Other Information: PBD: Mar 1991
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; REACTOR CORES; SUPERHEATING; SAFETY; FUNCTIONS; LAPLACE TRANSFORMATION; OPTIMIZATION; REACTOR OPERATION; TIME DEPENDENCE; 220400; CONTROL SYSTEMS
OSTI ID:
10113194
Research Organizations:
Korea Atomic Energy Research Inst., Daeduk (Korea, Republic of)
Country of Origin:
Korea, Republic of
Language:
English
Other Identifying Numbers:
Other: ON: DE92615095; TRN: KR9100133014945
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
72 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Park, Jin Ho, Yoo, Hyung Keun, Um, Kil Sup, Kim, Hee Cheol, and Lee, Jong Chul. Optimization of dynamic terms in core overtemperature delta-T trip function. Korea, Republic of: N. p., 1991. Web.
Park, Jin Ho, Yoo, Hyung Keun, Um, Kil Sup, Kim, Hee Cheol, & Lee, Jong Chul. Optimization of dynamic terms in core overtemperature delta-T trip function. Korea, Republic of.
Park, Jin Ho, Yoo, Hyung Keun, Um, Kil Sup, Kim, Hee Cheol, and Lee, Jong Chul. 1991. "Optimization of dynamic terms in core overtemperature delta-T trip function." Korea, Republic of.
@misc{etde_10113194,
title = {Optimization of dynamic terms in core overtemperature delta-T trip function}
author = {Park, Jin Ho, Yoo, Hyung Keun, Um, Kil Sup, Kim, Hee Cheol, and Lee, Jong Chul}
abstractNote = {The characteristics of the core overtemperature Delta-T (OT Delta-T) dynamic terms are investigated for various time constants. In addition, the effects of the dynamic terms on the OT Delta-T trip setpoint in case of the uncontrolled RCCA bank withdrawal at power transient are studied by using the NLOOP and the PUMA code. Based on the above study, the procedure in determining the optimal dynamic term is suggested and the time constants of the OT Delta-T dynamic terms are optimized for the KORI 3 and 4 transition core. It reveals that the most improtant one in the OT Delta-T dynamic terms affecting the minimum DNBR thorugh the system transient is the vessel average temperature lead-lag term, and the optimized time constants are 21 seconds for lead and 4 seconds for lag. By this optimization, the core operation region is expected to be improved without changing the core safety limits. (Author).}
place = {Korea, Republic of}
year = {1991}
month = {Mar}
}