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Title: Dissolver vessel bottom assembly

Abstract

An improved bottom assembly is provided for a nuclear reactor fuel reprocessing dissolver vessel wherein fuel elements are dissolved as the initial step in recovering fissile material from spent fuel rods. A shock-absorbing crash plate with a convex upper surface is disposed at the bottom of the dissolver vessel so as to provide an annular space between the crash plate and the dissolver vessel wall. A sparging ring is disposed within the annular space to enable a fluid discharged from the sparging ring to agitate the solids which deposit on the bottom of the dissolver vessel and accumulate in the annular space. An inlet tangential to the annular space permits a fluid pumped into the annular space through the inlet to flush these solids from the dissolver vessel through tangential outlets oppositely facing the inlet. The sparging ring is protected against damage from the impact of fuel elements being charged to the dissolver vessel by making the crash plate of such a diameter that the width of the annular space between the crash plate and the vessel wall is less than the diameter of the fuel elements.

Inventors:
 [1]
  1. Kennewick, WA
Issue Date:
Research Org.:
Aerojet Nuclear Co., Idaho Falls, Idaho (USA). Idaho National Engineering Lab.
OSTI Identifier:
862552
Patent Number(s):
3958948
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01F - MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
DOE Contract Number:  
AT(10-1)-1375
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dissolver; vessel; bottom; assembly; improved; provided; nuclear; reactor; fuel; reprocessing; elements; dissolved; initial; step; recovering; fissile; material; spent; rods; shock-absorbing; crash; plate; convex; upper; surface; disposed; provide; annular; space; wall; sparging; enable; fluid; discharged; agitate; solids; deposit; accumulate; inlet; tangential; permits; pumped; flush; outlets; oppositely; facing; protected; damage; impact; charged; diameter; width; vessel wall; fuel rods; upper surface; fuel elements; fuel element; nuclear reactor; spent fuel; reactor fuel; fuel rod; fissile material; annular space; dissolver vessel; vessel bottom; fuel reprocessing; oppositely facing; fluid pump; recovering fissile; fluid pumped; initial step; bottom assembly; /422/134/266/366/423/

Citation Formats

Kilian, Douglas C. Dissolver vessel bottom assembly. United States: N. p., 1976. Web.
Kilian, Douglas C. Dissolver vessel bottom assembly. United States.
Kilian, Douglas C. Thu . "Dissolver vessel bottom assembly". United States. https://www.osti.gov/servlets/purl/862552.
@article{osti_862552,
title = {Dissolver vessel bottom assembly},
author = {Kilian, Douglas C},
abstractNote = {An improved bottom assembly is provided for a nuclear reactor fuel reprocessing dissolver vessel wherein fuel elements are dissolved as the initial step in recovering fissile material from spent fuel rods. A shock-absorbing crash plate with a convex upper surface is disposed at the bottom of the dissolver vessel so as to provide an annular space between the crash plate and the dissolver vessel wall. A sparging ring is disposed within the annular space to enable a fluid discharged from the sparging ring to agitate the solids which deposit on the bottom of the dissolver vessel and accumulate in the annular space. An inlet tangential to the annular space permits a fluid pumped into the annular space through the inlet to flush these solids from the dissolver vessel through tangential outlets oppositely facing the inlet. The sparging ring is protected against damage from the impact of fuel elements being charged to the dissolver vessel by making the crash plate of such a diameter that the width of the annular space between the crash plate and the vessel wall is less than the diameter of the fuel elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

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