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

Title: In-Pile Fuel Rod Deformation Measurements Using Miniaturized LVDT Technology

Abstract

Different types of materials are being considered for fuel, cladding, and structures in existing and advanced nuclear reactors. These materials can undergo significant dimensional changes during irradiation. Currently in the US, such changes are measured with the ‘cook and look’ method (i.e. repeatedly irradiating a specimen for a specified period of time, and then removing it from the reactor for evaluation) – which leads to costly and time consuming experiments. In addition, such techniques provide limited data, and handling may disturb the phenomena of interest. Therefore, in-pile detection of geometric changes is needed to understand real-time behavior during irradiation testing of fuels and materials in high flux US Material and Test Reactors (MTRs). The developmental results of an advanced Linear Variable Differential Transformer (LVDT)-based test rig capable of detecting real-time changes in diameter or length of fuel rods or other material samples during irradiation in US MTRs are presented. The LVDT is being developed at the Idaho National Laboratory (INL), and will provide experimenters with the capability to measure dimensional changes associated with fuel and clad swelling, pellet-clad interaction, and crud buildup. The LVDT design utilizes the MTR’s loop pressure to drive the test specimen at a constant rate. Thismore » leads to a simplified construction which only requires three pressure boundary penetrations. Further, the LVDT pressure boundary is a leak tight hydraulic ram capable of actuating under low differential pressure (e.g. 1 psid), and is able to survive the high irradiation tests at Pressurized Water Reactor (PWR) conditions.« less

Authors:
 [1];  [2];  [2];  [1];  [1];  [1];  [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Boise State Univ., Boise, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1473583
Report Number(s):
INL/EXT-17-43379-Rev000
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; LVDT; in-pile; instrumentation

Citation Formats

Skifton, Richard, Schoensee, Luke, Jaques, Brian, Davis, Kurt, Crawford, Anthony, Calderoni, Pattrick, and Bartz, Aaron. In-Pile Fuel Rod Deformation Measurements Using Miniaturized LVDT Technology. United States: N. p., 2017. Web. doi:10.2172/1473583.
Skifton, Richard, Schoensee, Luke, Jaques, Brian, Davis, Kurt, Crawford, Anthony, Calderoni, Pattrick, & Bartz, Aaron. In-Pile Fuel Rod Deformation Measurements Using Miniaturized LVDT Technology. United States. doi:10.2172/1473583.
Skifton, Richard, Schoensee, Luke, Jaques, Brian, Davis, Kurt, Crawford, Anthony, Calderoni, Pattrick, and Bartz, Aaron. Fri . "In-Pile Fuel Rod Deformation Measurements Using Miniaturized LVDT Technology". United States. doi:10.2172/1473583. https://www.osti.gov/servlets/purl/1473583.
@article{osti_1473583,
title = {In-Pile Fuel Rod Deformation Measurements Using Miniaturized LVDT Technology},
author = {Skifton, Richard and Schoensee, Luke and Jaques, Brian and Davis, Kurt and Crawford, Anthony and Calderoni, Pattrick and Bartz, Aaron},
abstractNote = {Different types of materials are being considered for fuel, cladding, and structures in existing and advanced nuclear reactors. These materials can undergo significant dimensional changes during irradiation. Currently in the US, such changes are measured with the ‘cook and look’ method (i.e. repeatedly irradiating a specimen for a specified period of time, and then removing it from the reactor for evaluation) – which leads to costly and time consuming experiments. In addition, such techniques provide limited data, and handling may disturb the phenomena of interest. Therefore, in-pile detection of geometric changes is needed to understand real-time behavior during irradiation testing of fuels and materials in high flux US Material and Test Reactors (MTRs). The developmental results of an advanced Linear Variable Differential Transformer (LVDT)-based test rig capable of detecting real-time changes in diameter or length of fuel rods or other material samples during irradiation in US MTRs are presented. The LVDT is being developed at the Idaho National Laboratory (INL), and will provide experimenters with the capability to measure dimensional changes associated with fuel and clad swelling, pellet-clad interaction, and crud buildup. The LVDT design utilizes the MTR’s loop pressure to drive the test specimen at a constant rate. This leads to a simplified construction which only requires three pressure boundary penetrations. Further, the LVDT pressure boundary is a leak tight hydraulic ram capable of actuating under low differential pressure (e.g. 1 psid), and is able to survive the high irradiation tests at Pressurized Water Reactor (PWR) conditions.},
doi = {10.2172/1473583},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {9}
}

Technical Report:

Save / Share: