Double heterogeneity of randomly located pebbles in
the core and Coated Fuel Particles (CFPs) in the pebbles are specific
features in pebble bed reactors and usually, because of difficulty to
model with MCNP code capabilities, are neglected. In this study,
characteristics of HTR-10, Tsinghua University research reactor, are
used and not only double heterogeneous but also truncated CFPs and
Pebbles are considered.Firstly, 8335 CFPs are distributed randomly
in a pebble and then the core of reactor is filled with those pebbles
and graphite pebbles as moderator such that 57:43 ratio of fuel and
moderator pebbles is established.Finally, four different core
configurations are modeled. They are Simple Cubic (SC) structure
with truncated pebbles,SC structure without truncated pebble, and
Simple Hexagonal(SH) structure without truncated pebbles and SH
structure with truncated pebbles. Results like effective multiplication
factor (Keff), critical height,etc. are compared with available data.
[1] E. Webbe, "Simulation of A Randomly Packed Pebble Bed Using The
Discrete Element Method", Physics Of Nuclear Reactors, Delft
University Of Technology, June 23, 2009.
[2] S. Hu, X. Liang, L. Wei, "Commissioning And Operation Experience
and Safety Experiments On HTR-10", 3rd International Topical Meeting
on High Temperature Reactor Technology, P.1-16, October 1-4, 2006.
[3] S. Hu, R.Wang, Z. Gao, "Safety Demonstration Tests On HTR-10",2nd
International Topical Meeting On High Temperature Reactor
Technology , Beijing, China,, P.1-16, September 22-24, 2004.
[4] V.Seker, Ü. Çolak, "HTR-10 Full Core First Criticality Analysis
withMCNP", Nuclear Engineering andDesign, P.263-270, 2003.
[5] J.Lebenhaft, "Mcnp4b Modeling of Pebble Bed Reactors", MIT Thesis,
October 2001.
[6] K. M. Bakhshayesh and N. Vosoughi, "A Simulation of A Pebble Bed
Reactor Core by the MCNP-4C Computer Code", Nuclear Technology
& Radiation Protection, P.177-182, October 16, 2009.
[7] H.C.Kim, S. H. Kim, J. K. Kim, " A New Strategy To Simulate A
Random Geometry In A Pebble-Bed Core With The Monte Carlo Code
MCNP" , Annals Of Nuclear Energy,P1-7, Accepted 18 May 2011.
[8] Ü. Çolak, V.Seker, "Monte Carlo Criticality Calculations for A Pebble
Bed Reactor with MCNP", Nuclear Science and Engineering, P.131-
137, 2005.
[9] MCNPTMÔÇöAGeneralMonteCarlo NParticleTransportCode.
LosAlamosNationalLaboratory, Version5-
1.51,LA-12625.
[10] H. Chang , X. Raepsaet, F. Damian , Y.K. Lee ,O. Koberl, X. Jing , Y.
Yang, " Analysis of HTR-10 First Criticality with Monte Carlo Code
Tripoli-4.3" 2nd International Topical Meeting On High Temperature
Reactor Technology, Beijing, CHINA, September 22-24, 2004.
[11] Y. Yang ,Z. Luo,X. Jing,Z. Wu,
"FuelManagementOfTheHTR10IncludingTheEquilibriumStateAndTheR
unning-InPhase", NuclearEngineeringandDesign, P33-41, 2002.
[12] Evaluation of high temperature gas cooled reactor performance:
Benchmark analysis related to initial testing of the HTTR and HTR-
10,IAEA-TECDOC-1382.
[13] B.B. Forrest,R.M.William, "Stochastic geometry capability in MCNP5
for theanalysisofparticlefuel",AnnalsofNuclear Energy, P2039-2047,
2004.
[14] H.J. Rtitten, K.A. Haas, H. Brockmann, W. Scherer "V. S. O. P.
(99/05),Computer Code System for Reactor Physicsand Fuel Cycle
Simulation",October 2005.
[1] E. Webbe, "Simulation of A Randomly Packed Pebble Bed Using The
Discrete Element Method", Physics Of Nuclear Reactors, Delft
University Of Technology, June 23, 2009.
[2] S. Hu, X. Liang, L. Wei, "Commissioning And Operation Experience
and Safety Experiments On HTR-10", 3rd International Topical Meeting
on High Temperature Reactor Technology, P.1-16, October 1-4, 2006.
[3] S. Hu, R.Wang, Z. Gao, "Safety Demonstration Tests On HTR-10",2nd
International Topical Meeting On High Temperature Reactor
Technology , Beijing, China,, P.1-16, September 22-24, 2004.
[4] V.Seker, Ü. Çolak, "HTR-10 Full Core First Criticality Analysis
withMCNP", Nuclear Engineering andDesign, P.263-270, 2003.
[5] J.Lebenhaft, "Mcnp4b Modeling of Pebble Bed Reactors", MIT Thesis,
October 2001.
[6] K. M. Bakhshayesh and N. Vosoughi, "A Simulation of A Pebble Bed
Reactor Core by the MCNP-4C Computer Code", Nuclear Technology
& Radiation Protection, P.177-182, October 16, 2009.
[7] H.C.Kim, S. H. Kim, J. K. Kim, " A New Strategy To Simulate A
Random Geometry In A Pebble-Bed Core With The Monte Carlo Code
MCNP" , Annals Of Nuclear Energy,P1-7, Accepted 18 May 2011.
[8] Ü. Çolak, V.Seker, "Monte Carlo Criticality Calculations for A Pebble
Bed Reactor with MCNP", Nuclear Science and Engineering, P.131-
137, 2005.
[9] MCNPTMÔÇöAGeneralMonteCarlo NParticleTransportCode.
LosAlamosNationalLaboratory, Version5-
1.51,LA-12625.
[10] H. Chang , X. Raepsaet, F. Damian , Y.K. Lee ,O. Koberl, X. Jing , Y.
Yang, " Analysis of HTR-10 First Criticality with Monte Carlo Code
Tripoli-4.3" 2nd International Topical Meeting On High Temperature
Reactor Technology, Beijing, CHINA, September 22-24, 2004.
[11] Y. Yang ,Z. Luo,X. Jing,Z. Wu,
"FuelManagementOfTheHTR10IncludingTheEquilibriumStateAndTheR
unning-InPhase", NuclearEngineeringandDesign, P33-41, 2002.
[12] Evaluation of high temperature gas cooled reactor performance:
Benchmark analysis related to initial testing of the HTTR and HTR-
10,IAEA-TECDOC-1382.
[13] B.B. Forrest,R.M.William, "Stochastic geometry capability in MCNP5
for theanalysisofparticlefuel",AnnalsofNuclear Energy, P2039-2047,
2004.
[14] H.J. Rtitten, K.A. Haas, H. Brockmann, W. Scherer "V. S. O. P.
(99/05),Computer Code System for Reactor Physicsand Fuel Cycle
Simulation",October 2005.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:54992", author = "Amin Abedi and Naser Vosoughi and Mohammad Bagher Ghofrani", title = "An Exact MCNP Modeling of Pebble Bed Reactors", abstract = "Double heterogeneity of randomly located pebbles in
the core and Coated Fuel Particles (CFPs) in the pebbles are specific
features in pebble bed reactors and usually, because of difficulty to
model with MCNP code capabilities, are neglected. In this study,
characteristics of HTR-10, Tsinghua University research reactor, are
used and not only double heterogeneous but also truncated CFPs and
Pebbles are considered.Firstly, 8335 CFPs are distributed randomly
in a pebble and then the core of reactor is filled with those pebbles
and graphite pebbles as moderator such that 57:43 ratio of fuel and
moderator pebbles is established.Finally, four different core
configurations are modeled. They are Simple Cubic (SC) structure
with truncated pebbles,SC structure without truncated pebble, and
Simple Hexagonal(SH) structure without truncated pebbles and SH
structure with truncated pebbles. Results like effective multiplication
factor (Keff), critical height,etc. are compared with available data.", keywords = "Double Heterogeneity,HTR-10, MCNP, Pebble Bed Reactor, Stochastic Geometry.", volume = "5", number = "11", pages = "967-5", }