Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector

Research output: Contribution to report/book/conference proceedingsIn-proceedings paperpeer-review

Standard

Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector. / Kalcheva, Silva; Koonen, Edgar; Ponsard, Bernard (Peer reviewer).

PHYSOR 2006: Advances in Nuclear Analysis and Simulation. Illinois, United States, 2006. p. 1-10 (International Conference on the Physics of Reactors).

Research output: Contribution to report/book/conference proceedingsIn-proceedings paperpeer-review

Harvard

Kalcheva, S, Koonen, E & Ponsard, B 2006, Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector. in PHYSOR 2006: Advances in Nuclear Analysis and Simulation. International Conference on the Physics of Reactors, Illinois, United States, pp. 1-10, 2006 - PHYSOR , Vancouver, Canada, 2006-09-10.

APA

Kalcheva, S., Koonen, E., & Ponsard, B. (2006). Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector. In PHYSOR 2006: Advances in Nuclear Analysis and Simulation (pp. 1-10). (International Conference on the Physics of Reactors)..

Vancouver

Kalcheva S, Koonen E, Ponsard B. Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector. In PHYSOR 2006: Advances in Nuclear Analysis and Simulation. Illinois, United States. 2006. p. 1-10. (International Conference on the Physics of Reactors).

Author

Kalcheva, Silva ; Koonen, Edgar ; Ponsard, Bernard. / Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector. PHYSOR 2006: Advances in Nuclear Analysis and Simulation. Illinois, United States, 2006. pp. 1-10 (International Conference on the Physics of Reactors).

Bibtex - Download

@inproceedings{bb4aa68bf64047aaa5c37e50de6c47d2,
title = "Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector",
abstract = "A study about the contribution of photo neutrons, produced in (gamma,n) – reactions of Be-9 into the reactivity worth of He-3 in a reactor with beryllium reflector is presented. Neutron interactions with beryllium lead to formation of 3T and strong neutron absorbers He-3 and Li-6 in the reflector (so called beryllium poisoning). After the reactor shut down, the concentration of helium – 3 increases in time due to tritium decay. The negative reactivity effect of neutron absorption by accumulated 3He has been considered in a few papers, concerning reactivity losses in reactors with beryllium reflector. The contributions of the photo neutrons for additional production of tritium during the reactor operation and enhanced build up of helium – 3 after the shut down have not been discussed previously. Calculations of the photonuclear reactions in beryllium are performed for the Belgian Material Testing Reactor BR2 and for a generic reactor model with beryllium reflector. The calculation analysis has shown an increase of about ~ 20% in the reactivity worth of helium – 3 by photo neutrons. The effective fraction of photo neutrons is estimated using MCNP5 with included (gamma,n) – reactions.",
keywords = "photo neutrons, beryllium, helium – 3, MCNP5",
author = "Silva Kalcheva and Edgar Koonen and Bernard Ponsard",
note = "Score = 1; 2006 - PHYSOR : Advances in Nuclear Analysis and Simulation ; Conference date: 10-09-2006 Through 14-09-2006",
year = "2006",
month = sep,
day = "5",
language = "English",
isbn = "978-0-89448-697-5",
series = "International Conference on the Physics of Reactors",
pages = "1--10",
booktitle = "PHYSOR 2006: Advances in Nuclear Analysis and Simulation",

}

RIS - Download

TY - GEN

T1 - Impact of Photo neutrons on Reactivity Worth of 3He In a Reactor with Beryllium Reflector

AU - Kalcheva, Silva

AU - Koonen, Edgar

A2 - Ponsard, Bernard

N1 - Score = 1

PY - 2006/9/5

Y1 - 2006/9/5

N2 - A study about the contribution of photo neutrons, produced in (gamma,n) – reactions of Be-9 into the reactivity worth of He-3 in a reactor with beryllium reflector is presented. Neutron interactions with beryllium lead to formation of 3T and strong neutron absorbers He-3 and Li-6 in the reflector (so called beryllium poisoning). After the reactor shut down, the concentration of helium – 3 increases in time due to tritium decay. The negative reactivity effect of neutron absorption by accumulated 3He has been considered in a few papers, concerning reactivity losses in reactors with beryllium reflector. The contributions of the photo neutrons for additional production of tritium during the reactor operation and enhanced build up of helium – 3 after the shut down have not been discussed previously. Calculations of the photonuclear reactions in beryllium are performed for the Belgian Material Testing Reactor BR2 and for a generic reactor model with beryllium reflector. The calculation analysis has shown an increase of about ~ 20% in the reactivity worth of helium – 3 by photo neutrons. The effective fraction of photo neutrons is estimated using MCNP5 with included (gamma,n) – reactions.

AB - A study about the contribution of photo neutrons, produced in (gamma,n) – reactions of Be-9 into the reactivity worth of He-3 in a reactor with beryllium reflector is presented. Neutron interactions with beryllium lead to formation of 3T and strong neutron absorbers He-3 and Li-6 in the reflector (so called beryllium poisoning). After the reactor shut down, the concentration of helium – 3 increases in time due to tritium decay. The negative reactivity effect of neutron absorption by accumulated 3He has been considered in a few papers, concerning reactivity losses in reactors with beryllium reflector. The contributions of the photo neutrons for additional production of tritium during the reactor operation and enhanced build up of helium – 3 after the shut down have not been discussed previously. Calculations of the photonuclear reactions in beryllium are performed for the Belgian Material Testing Reactor BR2 and for a generic reactor model with beryllium reflector. The calculation analysis has shown an increase of about ~ 20% in the reactivity worth of helium – 3 by photo neutrons. The effective fraction of photo neutrons is estimated using MCNP5 with included (gamma,n) – reactions.

KW - photo neutrons

KW - beryllium

KW - helium – 3

KW - MCNP5

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_78539

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_78539_2

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_78539_3

UR - http://knowledgecentre.sckcen.be/so2/bibref/4212

M3 - In-proceedings paper

SN - 978-0-89448-697-5

T3 - International Conference on the Physics of Reactors

SP - 1

EP - 10

BT - PHYSOR 2006: Advances in Nuclear Analysis and Simulation

CY - Illinois, United States

T2 - 2006 - PHYSOR

Y2 - 10 September 2006 through 14 September 2006

ER -

ID: 173608