Study of reactivity effects of fission products and actinides after power transients in PWR NPP

Research output: ThesisMaster's thesis

Standard

Study of reactivity effects of fission products and actinides after power transients in PWR NPP. / Vase, Gwennaël; Van den Eynde, Gert (Peer reviewer).

Mol, Belgium : BNEN - Belgian Nuclear Higher Education Network, 2012. 83 p.

Research output: ThesisMaster's thesis

Harvard

Vase, G & Van den Eynde, G 2012, 'Study of reactivity effects of fission products and actinides after power transients in PWR NPP', BNEN - Belgian Nuclear Higher Education Network, Mol, Belgium.

APA

Vase, G., & Van den Eynde, G. (2012). Study of reactivity effects of fission products and actinides after power transients in PWR NPP. Mol, Belgium: BNEN - Belgian Nuclear Higher Education Network.

Vancouver

Vase G, Van den Eynde G. Study of reactivity effects of fission products and actinides after power transients in PWR NPP. Mol, Belgium: BNEN - Belgian Nuclear Higher Education Network, 2012. 83 p.

Author

Vase, Gwennaël ; Van den Eynde, Gert. / Study of reactivity effects of fission products and actinides after power transients in PWR NPP. Mol, Belgium : BNEN - Belgian Nuclear Higher Education Network, 2012. 83 p.

Bibtex - Download

@phdthesis{f067ddbfa4fd46ca929fdc1ccd4779d2,
title = "Study of reactivity effects of fission products and actinides after power transients in PWR NPP",
abstract = "This thesis presents a safety issue concerning NPP’s that restart after a period of a few days consecutive to a shutdown. It concerns reactivity effects due to actinides and fission products during transients in the PWR reactors operated in Belgium by Electrabel. The purpose of the work is firstly to identify the approximations made at present in the standard calculation chain used by Tractebel Engineering S.A. in support of the operation of the reactors on the reactivity created by fission products and actinides after a shutdown. Secondly, we will develop a correlation on basis of a single pin model for the evolution of the reactivity of fission products and actinides after a shutdown that depends on important parameters as burn up, power density, time and enrichment. Finally, we will use this correlation to generalise the effect on reactivity for a whole reactor in order to correct some approximations made by the calculation chain used by TE. The results of calculations show that the reactivity created by fission products and actinides nearly compensate the Sm-149 effect after a shutdown and have an influence on the reactivity balance to bring the reactor critical.",
keywords = "PWR, NPP, fission, actinides, ALEPH, SCRAM",
author = "Gwenna{\"e}l Vase and {Van den Eynde}, Gert",
note = "Score = 2",
year = "2012",
month = "8",
day = "30",
language = "English",
publisher = "BNEN - Belgian Nuclear Higher Education Network",
school = "BNEN - Belgian Nuclear Higher Education Network",

}

RIS - Download

TY - THES

T1 - Study of reactivity effects of fission products and actinides after power transients in PWR NPP

AU - Vase, Gwennaël

A2 - Van den Eynde, Gert

N1 - Score = 2

PY - 2012/8/30

Y1 - 2012/8/30

N2 - This thesis presents a safety issue concerning NPP’s that restart after a period of a few days consecutive to a shutdown. It concerns reactivity effects due to actinides and fission products during transients in the PWR reactors operated in Belgium by Electrabel. The purpose of the work is firstly to identify the approximations made at present in the standard calculation chain used by Tractebel Engineering S.A. in support of the operation of the reactors on the reactivity created by fission products and actinides after a shutdown. Secondly, we will develop a correlation on basis of a single pin model for the evolution of the reactivity of fission products and actinides after a shutdown that depends on important parameters as burn up, power density, time and enrichment. Finally, we will use this correlation to generalise the effect on reactivity for a whole reactor in order to correct some approximations made by the calculation chain used by TE. The results of calculations show that the reactivity created by fission products and actinides nearly compensate the Sm-149 effect after a shutdown and have an influence on the reactivity balance to bring the reactor critical.

AB - This thesis presents a safety issue concerning NPP’s that restart after a period of a few days consecutive to a shutdown. It concerns reactivity effects due to actinides and fission products during transients in the PWR reactors operated in Belgium by Electrabel. The purpose of the work is firstly to identify the approximations made at present in the standard calculation chain used by Tractebel Engineering S.A. in support of the operation of the reactors on the reactivity created by fission products and actinides after a shutdown. Secondly, we will develop a correlation on basis of a single pin model for the evolution of the reactivity of fission products and actinides after a shutdown that depends on important parameters as burn up, power density, time and enrichment. Finally, we will use this correlation to generalise the effect on reactivity for a whole reactor in order to correct some approximations made by the calculation chain used by TE. The results of calculations show that the reactivity created by fission products and actinides nearly compensate the Sm-149 effect after a shutdown and have an influence on the reactivity balance to bring the reactor critical.

KW - PWR

KW - NPP

KW - fission

KW - actinides

KW - ALEPH

KW - SCRAM

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_127506

M3 - Master's thesis

PB - BNEN - Belgian Nuclear Higher Education Network

CY - Mol, Belgium

ER -

ID: 306225