EBRPOCO - a program to calculate detailed contributions of power reactivity components of EBR-II
Description
The EBRPOCO program has been developed to facilitate the calculations of the power coefficients of reactivity of EBR-II loadings. The program enables contributions of various components of the power coefficient to be delineated axially for every subassembly. The program computes the reactivity contributions of the power coefficients resulting from: density reduction of sodium coolant due to temperature; displacement of sodium coolant by thermal expansions of cladding, structural rods, subassembly cans, and lower and upper axial reflectors; density reductions of these steel components due to temperature; displacement of bond-sodium (if present) in gaps by differential thermal expansions of fuel and cladding; density reduction of bond-sodium (if present) in gaps due to temperature; free axial expansion of fuel if unrestricted by cladding or restricted axial expansion of fuel determined by axial expansion of cladding. Isotopic spatial contributions to the Doppler component my also be obtained. (orig.)
Abstract (German)
Das Programm EBRPOCO wurde zur Vereinfachung der Berechnung der Reaktivitaets-Leistungskoeffizienten von EBR-II-Brennstoffladungen entwickelt. Das Programm gestattet die Darstellung der Beitraege verschiedener Komponenten des Leistungskoeffizienten fuer jedes Brennelement. Das Programm berechnet die folgenden Reaktivitaetsbeitraege der Leistungkoeffizienten: temperaturbedingte Dichteabnahme des Kuehlmittels Natrium; Verschiebung des Kuehlmittels Natrium infolge Waermedehnung von Huellen, Strukturstaeben, Brennelementumhuellung sowie unteren und oberen axialen Reflektoren; temperaturbedingte Dichteabnahmen dieser Stahlkomponenten; Verschiebungen des (soweit vorhanden) in Spalten gebundenen Natriums durch unterschiedliche Waermedehnung von Brennstoff und Huellen; freie Axialdehnung des Brennstoffs, sofern von den Huellen nicht behindert, oder behinderte Axialdehnung des Brennstoffs, die von der Axialdehnung der Huellen bestimmt wird. Die isotopen raeumlichen Beitraege zur Dopplerkomponente koennen ebenfalls gewonnen werden. (orig.)Additional details
Publishing Information
- Imprint Title
- Advances in mathematical methods for the solution of nuclear engineering problems. Vol. 2
- Imprint Pagination
- 639 p.
- Journal Page Range
- p. 225-235.
- Report number
- INIS-mf--6714
Conference
- Title
- Joint ANS/ENS international topical meeting on advances in mathematical methods for the solution of nuclear engineering problems.
- Dates
- 27 - 29 Apr 1981.
- Place
- Munich, Germany, F.R.
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 13654128
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CLADDING; DENSITY; DOPPLER COEFFICIENT; E CODES; EBR-2 REACTOR; POWER COEFFICIENT; REACTOR CORES; SODIUM; TEMPERATURE DEPENDENCE; THERMAL EXPANSION
- Descriptors DEC
- ALKALI METALS; BREEDER REACTORS; COMPUTER CODES; DEPOSITION; ELEMENTS; EPITHERMAL REACTORS; EXPANSION; EXPERIMENTAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; LIQUID METAL COOLED REACTORS; METALS; PHYSICAL PROPERTIES; POWER REACTORS; REACTIVITY COEFFICIENTS; REACTOR COMPONENTS; REACTORS; RESEARCH AND TEST REACTORS; SODIUM COOLED REACTORS; SURFACE COATING