Published October 2003
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Criticality of a 237Np sphere
Creators
- 1. Los Alamos National Laboratory, Los Alamos, NM (United States)
Description
A critical mass experiment using a 6-kg 237Np sphere has been performed. The purpose of the experiment is to get a better estimate of the critical mass of 237Np. To attain criticality, the 237Np sphere was surrounded with 93 wt% 235U shells. A 1/M as a function of uranium mass was performed. An MCNP neutron transport code was used to model the experiment. The MCNP code yielded a keff of 0.99089 ± 0.0003 compared with a keff 1.0026 for the experiment. Based on these results, it is estimated that the critical mass of 237Np ranges from kilogram weights in the high fifties to low sixties. (author)
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Additional details
Publishing Information
- Imprint Title
- ICNC2003: Proceedings of the seventh international conference on nuclear criticality safety. Challenges in the pursuit of global nuclear criticality safety
- Imprint Pagination
- 466 p.
- Journal Page Range
- p. 201-203
- Report number
- JAERI-Conf--2003-019-PT1
Conference
- Title
- 7. international conference on nuclear criticality safety. Challenges in the pursuit of global nuclear criticality safety
- Acronym
- ICNC2003
- Dates
- 20-24 Oct 2003
- Place
- Tokai, Ibaraki (Japan)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 36116453
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ALUMINIUM; BENCHMARKS; CRITICAL MASS; HIGHLY ENRICHED URANIUM; METALS; MONTE CARLO METHOD; MULTIPLICATION FACTORS; NEPTUNIUM 237; NEUTRON REFLECTORS; SPACERS; SPHERES
- Descriptors DEC
- ACTINIDE NUCLEI; ACTINIDES; ALPHA DECAY RADIOISOTOPES; CALCULATION METHODS; ELEMENTS; ENRICHED URANIUM; HEAVY NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPE ENRICHED MATERIALS; ISOTOPES; MASS; MATERIALS; METALS; NANOSECONDS LIVING RADIOISOTOPES; NEPTUNIUM ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; URANIUM; YEARS LIVING RADIOISOTOPES
Optional Information
- Lead record
- za1kc-v3h95
- Notes
- 3 refs., 5 figs., 1 tab.; This record replaces 35060828