skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hydro-ball in-core instrumentation system and method of operation

Abstract

A hydro-ball in-core instrumentation system employs detector strings each comprising a wire having radiation sensitive balls affixed diametrically at spaced positions therealong and opposite tip ends of which are transportable by fluid drag through interior passageways. In the passageways primary coolant is caused to flow selectively in first and second opposite directions for transporting the detector strings from stored positions in an exterior chamber to inserted positions within the instrumentation thimbles of the fuel rod assemblies of a pressure vessel, and for return. The coolant pressure within the detector passageways is the same as that within the vessel; face contact, disconnectable joints between sections of the interior passageways within the vessel facilitate assembly and disassembly of the vessel for refueling and routine maintenance operations. The detector strings may pass through a very short bend radius thereby minimizing space requirements for the connections of the instrumentation system to the vessel and concomitantly the vessel containment structure. Improved radiation mapping and a significant reduction in potential exposure of personnel to radiation are provided. Both top head and bottom head penetration embodiments are disclosed.

Inventors:
 [1];  [2];  [3]
  1. (Washington Township, Westmoreland County, PA)
  2. (O'Hara Township, Allegheny County, PA)
  3. (Pittsburgh, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
867577
Patent Number(s):
4966747
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) OSTI
DOE Contract Number:  
AC03-86SF16038
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydro-ball; in-core; instrumentation; method; operation; employs; detector; strings; comprising; wire; radiation; sensitive; balls; affixed; diametrically; spaced; positions; therealong; opposite; tip; transportable; fluid; drag; interior; passageways; primary; coolant; caused; flow; selectively; directions; transporting; stored; exterior; chamber; inserted; thimbles; fuel; rod; assemblies; pressure; vessel; return; contact; disconnectable; joints; sections; facilitate; assembly; disassembly; refueling; routine; maintenance; operations; pass; bend; radius; minimizing; space; requirements; connections; concomitantly; containment; structure; improved; mapping; significant; reduction; potential; exposure; personnel; provided; top; head; bottom; penetration; embodiments; disclosed; opposite direction; significant reduction; bottom head; opposite directions; containment structure; pressure vessel; fuel rod; primary coolant; rod assemblies; radiation sensitive; spaced positions; improved radiation; facilitate assembly; in-core instrumentation; hydro-ball in-core; positions therealong; /376/

Citation Formats

Tower, Stephen N., Veronesi, Luciano, and Braun, Howard E. Hydro-ball in-core instrumentation system and method of operation. United States: N. p., 1990. Web.
Tower, Stephen N., Veronesi, Luciano, & Braun, Howard E. Hydro-ball in-core instrumentation system and method of operation. United States.
Tower, Stephen N., Veronesi, Luciano, and Braun, Howard E. Mon . "Hydro-ball in-core instrumentation system and method of operation". United States. https://www.osti.gov/servlets/purl/867577.
@article{osti_867577,
title = {Hydro-ball in-core instrumentation system and method of operation},
author = {Tower, Stephen N. and Veronesi, Luciano and Braun, Howard E.},
abstractNote = {A hydro-ball in-core instrumentation system employs detector strings each comprising a wire having radiation sensitive balls affixed diametrically at spaced positions therealong and opposite tip ends of which are transportable by fluid drag through interior passageways. In the passageways primary coolant is caused to flow selectively in first and second opposite directions for transporting the detector strings from stored positions in an exterior chamber to inserted positions within the instrumentation thimbles of the fuel rod assemblies of a pressure vessel, and for return. The coolant pressure within the detector passageways is the same as that within the vessel; face contact, disconnectable joints between sections of the interior passageways within the vessel facilitate assembly and disassembly of the vessel for refueling and routine maintenance operations. The detector strings may pass through a very short bend radius thereby minimizing space requirements for the connections of the instrumentation system to the vessel and concomitantly the vessel containment structure. Improved radiation mapping and a significant reduction in potential exposure of personnel to radiation are provided. Both top head and bottom head penetration embodiments are disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

Patent:

Save / Share: