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Nuclear fuel utilization in Kozloduy NPP

Abstract

An assessment of fuel utilization in Kozloduy NPP units 1-6 is made on the basis of operational data obtained for a total of 62 fuel cycles. Basic characteristics of core loading and operation conditions are given. SPPS-1 and BIPR-7 codes are used to calculate assembly-wise power distributions for different full power days of a given cycle and unit. The data are compared with the measured values of these quantities. The analysis performed shows that the core loading option chosen has led to efficient fuel utilization without violation of the nuclear safety criteria. For WWER-440 (Units 1 - 4) this is expressed in effective reduction of the reactor vessel irradiation, maintaining the design duration of the fuel cycles at a reduced number of assemblies by a factor 5 - 5-10%, utilizing fuel with higher enrichment and implementing the 4-year fuel cycle. For WWER-1000 the improvements lead to: adoption of the 3-year fuel cycle utilizing fuel with 4.4% initial enrichment, implementation of improved fuel with a new type of absorbers and more effective low-leakage core loading patterns. 10 tabs., 6 figs., 7 refs.
Authors:
Boyadzhiev, Z; Kharalampieva, Ts; Pejchinov, Ts [1] 
  1. Kombinat Atomna Energetika, Kozloduj (Bulgaria)
Publication Date:
Dec 31, 1994
Product Type:
Miscellaneous
Report Number:
INIS-BG-0012; CONF-9409466-
Reference Number:
SCA: 210200; PA: AIX-28:034581; EDB-97:060704; SN: 97001775157
Resource Relation:
Conference: International seminar on WWER reactor fuel performance, modelling and experimental support, St. Constantine (Bulgaria), 7-11 Sep 1994; Other Information: PBD: 1994; Related Information: Is Part Of WWER reactor fuel performance, modelling and experimental support. Proceedings; Stefanova, S.; Chantoin, P.; Kolev, I. [eds.]; PB: 272 p.
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; REACTOR FUELING; REACTOR SAFETY; COMPILED DATA; FUEL ASSEMBLIES; KOZLODUY-1 REACTOR; KOZLODUY-2 REACTOR; KOZLODUY-3 REACTOR; KOZLODUY-4 REACTOR; KOZLODUY-5 REACTOR; KOZLODUY-6 REACTOR; PRESSURE VESSELS
OSTI ID:
463237
Research Organizations:
Bylgarska Akademiya na Naukite, Sofia (Bulgaria). Inst. za Yadrena Izsledvaniya i Yadrena Energetika
Country of Origin:
Bulgaria
Language:
English
Other Identifying Numbers:
Other: ON: DE97620150; TRN: BG96A0352034581
Availability:
INIS; OSTI as DE97620150
Submitting Site:
INIS
Size:
pp. 13-25
Announcement Date:
May 09, 1997

Citation Formats

Boyadzhiev, Z, Kharalampieva, Ts, and Pejchinov, Ts. Nuclear fuel utilization in Kozloduy NPP. Bulgaria: N. p., 1994. Web.
Boyadzhiev, Z, Kharalampieva, Ts, & Pejchinov, Ts. Nuclear fuel utilization in Kozloduy NPP. Bulgaria.
Boyadzhiev, Z, Kharalampieva, Ts, and Pejchinov, Ts. 1994. "Nuclear fuel utilization in Kozloduy NPP." Bulgaria.
@misc{etde_463237,
title = {Nuclear fuel utilization in Kozloduy NPP}
author = {Boyadzhiev, Z, Kharalampieva, Ts, and Pejchinov, Ts}
abstractNote = {An assessment of fuel utilization in Kozloduy NPP units 1-6 is made on the basis of operational data obtained for a total of 62 fuel cycles. Basic characteristics of core loading and operation conditions are given. SPPS-1 and BIPR-7 codes are used to calculate assembly-wise power distributions for different full power days of a given cycle and unit. The data are compared with the measured values of these quantities. The analysis performed shows that the core loading option chosen has led to efficient fuel utilization without violation of the nuclear safety criteria. For WWER-440 (Units 1 - 4) this is expressed in effective reduction of the reactor vessel irradiation, maintaining the design duration of the fuel cycles at a reduced number of assemblies by a factor 5 - 5-10%, utilizing fuel with higher enrichment and implementing the 4-year fuel cycle. For WWER-1000 the improvements lead to: adoption of the 3-year fuel cycle utilizing fuel with 4.4% initial enrichment, implementation of improved fuel with a new type of absorbers and more effective low-leakage core loading patterns. 10 tabs., 6 figs., 7 refs.}
place = {Bulgaria}
year = {1994}
month = {Dec}
}