SCDAP/RELAP5 Modeling of Movement of Melted Material Through Porous Debris in Lower Head Metadata

Title

• Main Title SCDAP/RELAP5 Modeling of Movement of Melted Material Through Porous Debris in Lower Head

Creator

• Author: Siefken, L. J.
  Creator Type: Personal

Contributor

• Sponsor: United States. Department of Energy.
  Contributor Type: Organization
  Contributor Info: US Department of Energy (United States)

Publisher

• Name: Idaho National Engineering and Environmental Laboratory
  Place of Publication: Idaho Falls, Idaho
  Additional Info: Idaho National Engineering and Environmental Lab., Idaho Falls, ID (United States)

Date

• Creation: 1998-12-01

Language

• English

Description

• Content Description: Designs are described for implementing models for calculating the movement of melted material through the interstices in a matrix of porous debris in the lower head of a reactor vessel. The COUPLE model in SCDAP/RELAP5 represents both the porous and nonporous debris that results from core material slumping into the lower head during a severe accident in a Light Water Reactor. Currently, the COUPLE model has no capability to model the movement of material that melts within a matrix of porous material. The COUPLE model also does not have the capability to model the movement of liquefied core plate material that slumps onto a porous debris bed in the lower head. In order to advance beyond the assumption the liquefied material always remains stationary, designs are developed for calculations of the movement of liquefied material through the interstices in a matrix of porous material. Correlations are identified for calculating the permeability of the porous debris and for calculating the rate of flow of liquefied material through the interstices in the debris bed. Correlations are also identified for calculating the relocation of solid debris that has a large amount of cavities due to the flowing away of melted material. Equations are defined for calculating the effect on the temperature distribution in the debris bed of heat transported by moving material and for changes in effective thermal conductivity and heat capacity due to the movement of material. The implementation of these models is expected to improve the calculation of the material distribution and temperature distribution of debris in the lower head for cases in which the debris is porous and liquefied material is present within the porous debris.
• Physical Description: 36 p.

Subject

• Keyword: Reactor Vessels
• Keyword: Melted Core Material
• Keyword: Couple
• Keyword: Lower Head
• Keyword: Porous Materials
• Keyword: Porous Debris
• STI Subject Categories: 22 General Studies Of Nuclear Reactors
• Keyword: Light Water Reactor
• Keyword: Specific Heat
• Keyword: Temperature Distribution
• Keyword: S Codes
• Keyword: Water Cooled Reactors
• Keyword: Nonporous Debris
• Keyword: Reactor Vessel
• Keyword: Mass Transfer
• Keyword: Interstices
• Keyword: Effective Thermal Conductivity
• Keyword: Severe Accident
• Keyword: Scdap/Relap5
• Keyword: R Codes
• Keyword: Core Material
• STI Subject Categories: 99 General And Miscellaneous//Mathematics, Computing, And Information Science
• Keyword: Thermal Conductivity
• Keyword: C Codes
• Keyword: Corium Interstices

Source

• Other Information: PBD: 1 Dec 1998

Collection

• Name: Office of Scientific & Technical Information Technical Reports
  Code: OSTI

Institution

• Name: UNT Libraries Government Documents Department
  Code: UNTGD

Resource Type

• Report

Format

• Text

Identifier

• Report No.: INEEL/EXT-98-01178
• Grant Number: AC07-94ID13223
• DOI: 10.2172/5864
• Office of Scientific & Technical Information Report Number: 5864
• Archival Resource Key: ark:/67531/metadc695622

Note

• Display Note: INIS; OSTI as DE00005864
• Display Note: Medium: P; Size: 36 pages