The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor

Adimir Dos Santos; Ricardo Diniz; Rogerio Jerez; Luiz Antonio Mai; Mitsuo Yamaguchi; Graciete S. De Andrade e Silva; Arlindo Gilson Mendonça

The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor

Adimir Dos Santos
, Ricardo Diniz
, Rogerio Jerez
, Luiz Antonio Mai
, Mitsuo Yamaguchi
, Graciete S. De Andrade e Silva
, Arlindo Gilson Mendonça

Criticality Safety Analysis and Research

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

An in-pile experiment for the determination of the relative abundances and decay constants of delayed neutrons has been successfully performed at the IPEN/MB-01 research reactor facility. The experimental data are of good quality and can be used to validate theoretical predictions of the delayed neutron group constants based on the current knowledge of the fission products yields and emission probabilities for known precursors. The theory/experiment comparison shows that the current of ENDF/B-VI, namely release 8, shows severe discrepancies in both relative abundances and in the first decay constant. The revised version performed at LANL shows very good progress in both aspects. The best performance is obtained from JENDL3.3. One of the main achievements of the experiment was the consistency of the measured first decay constant to that of ⁸⁷Br. This consistency has never been proved in an in-pile experiment. Furthermore, for the first time it is shown experimental results from an in-pile experiment for an eight-group model.

Original language	English
Title of host publication	Proceedings of the PHYSOR 2004
Subtitle of host publication	The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
Pages	285-292
Number of pages	8
State	Published - 2004
Event	PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments - Chicago, IL, United States Duration: Apr 25 2004 → Apr 29 2004

Publication series

Name	Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments

Conference

Conference	PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
Country/Territory	United States
City	Chicago, IL
Period	04/25/04 → 04/29/04

Keywords

Benchmark
Delayed neutrons
ENDF/B-VI
Experiments
IPEN/MB-01
JENDL3.3
Nuclear data
Reactor kinetics

Cite this

Dos Santos, A., Diniz, R., Jerez, R., Mai, L. A., Yamaguchi, M., De Andrade e Silva, G. S., & Mendonça, A. G. (2004). The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor. In Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments (pp. 285-292). (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

Dos Santos, Adimir ; Diniz, Ricardo ; Jerez, Rogerio et al. / The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor. Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. 2004. pp. 285-292 (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

@inproceedings{04fb6ab9b5b8433687f261fd7974a918,

title = "The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor",

abstract = "An in-pile experiment for the determination of the relative abundances and decay constants of delayed neutrons has been successfully performed at the IPEN/MB-01 research reactor facility. The experimental data are of good quality and can be used to validate theoretical predictions of the delayed neutron group constants based on the current knowledge of the fission products yields and emission probabilities for known precursors. The theory/experiment comparison shows that the current of ENDF/B-VI, namely release 8, shows severe discrepancies in both relative abundances and in the first decay constant. The revised version performed at LANL shows very good progress in both aspects. The best performance is obtained from JENDL3.3. One of the main achievements of the experiment was the consistency of the measured first decay constant to that of 87Br. This consistency has never been proved in an in-pile experiment. Furthermore, for the first time it is shown experimental results from an in-pile experiment for an eight-group model.",

keywords = "Benchmark, Delayed neutrons, ENDF/B-VI, Experiments, IPEN/MB-01, JENDL3.3, Nuclear data, Reactor kinetics",

author = "\{Dos Santos\}, Adimir and Ricardo Diniz and Rogerio Jerez and Mai, \{Luiz Antonio\} and Mitsuo Yamaguchi and \{De Andrade e Silva\}, \{Graciete S.\} and Mendon{\c c}a, \{Arlindo Gilson\}",

year = "2004",

language = "English",

isbn = "0894486837",

series = "Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments",

pages = "285--292",

booktitle = "Proceedings of the PHYSOR 2004",

note = "PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments ; Conference date: 25-04-2004 Through 29-04-2004",

}

Dos Santos, A, Diniz, R, Jerez, R, Mai, LA, Yamaguchi, M, De Andrade e Silva, GS & Mendonça, AG 2004, The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor. in Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments, pp. 285-292, PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments, Chicago, IL, United States, 04/25/04.

The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor. / Dos Santos, Adimir; Diniz, Ricardo; Jerez, Rogerio et al.
Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. 2004. p. 285-292 (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor

AU - Dos Santos, Adimir

AU - Diniz, Ricardo

AU - Jerez, Rogerio

AU - Mai, Luiz Antonio

AU - Yamaguchi, Mitsuo

AU - De Andrade e Silva, Graciete S.

AU - Mendonça, Arlindo Gilson

PY - 2004

Y1 - 2004

N2 - An in-pile experiment for the determination of the relative abundances and decay constants of delayed neutrons has been successfully performed at the IPEN/MB-01 research reactor facility. The experimental data are of good quality and can be used to validate theoretical predictions of the delayed neutron group constants based on the current knowledge of the fission products yields and emission probabilities for known precursors. The theory/experiment comparison shows that the current of ENDF/B-VI, namely release 8, shows severe discrepancies in both relative abundances and in the first decay constant. The revised version performed at LANL shows very good progress in both aspects. The best performance is obtained from JENDL3.3. One of the main achievements of the experiment was the consistency of the measured first decay constant to that of 87Br. This consistency has never been proved in an in-pile experiment. Furthermore, for the first time it is shown experimental results from an in-pile experiment for an eight-group model.

AB - An in-pile experiment for the determination of the relative abundances and decay constants of delayed neutrons has been successfully performed at the IPEN/MB-01 research reactor facility. The experimental data are of good quality and can be used to validate theoretical predictions of the delayed neutron group constants based on the current knowledge of the fission products yields and emission probabilities for known precursors. The theory/experiment comparison shows that the current of ENDF/B-VI, namely release 8, shows severe discrepancies in both relative abundances and in the first decay constant. The revised version performed at LANL shows very good progress in both aspects. The best performance is obtained from JENDL3.3. One of the main achievements of the experiment was the consistency of the measured first decay constant to that of 87Br. This consistency has never been proved in an in-pile experiment. Furthermore, for the first time it is shown experimental results from an in-pile experiment for an eight-group model.

KW - Benchmark

KW - Delayed neutrons

KW - ENDF/B-VI

KW - Experiments

KW - IPEN/MB-01

KW - JENDL3.3

KW - Nuclear data

KW - Reactor kinetics

UR - https://www.scopus.com/pages/publications/22344449427

M3 - Conference contribution

AN - SCOPUS:22344449427

SN - 0894486837

T3 - Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments

SP - 285

EP - 292

BT - Proceedings of the PHYSOR 2004

T2 - PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments

Y2 - 25 April 2004 through 29 April 2004

ER -

Dos Santos A, Diniz R, Jerez R, Mai LA, Yamaguchi M, De Andrade e Silva GS et al. The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor. In Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments. 2004. p. 285-292. (Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments).

The experimental determination of the relative abundances and decay constants of delayed neutrons of the IPEN/MB-01 reactor

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Keywords

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