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Title: Design and operation of the core topography data acquisition system for TMI-2

Abstract

Development of effective procedures for recovery from the 1979 accident at the Three Mile Island 2 nuclear station requires a detailed and quantitative description of the postaccident configuration of the core. This report describes the techniques, equipment, and procedures used for making precise ultrasonic, sonar-like measurements of the cavity left in the upper core region as a result of the accident and details the primary results of the measurements. The system developed for the measurements uses computer techniques for the command and control of remote mechanical and electronic equipment, and for data acquisition and reduction. The system was designed, fabricated, and tested; procedures developed; and personnel trained in 4-1/2 months. The primary results are detailed topographic maps of the cavity. A variety of visual aids was developed to supplement the maps and aid in interpreting companion videotape surveys. The measurements reveal a cavity of 9.3 m/sup 3/, approximately 26% of the total core volume. The cavity occupies most of the full diameter of the core to an average depth of about 1.5 m and approaches 2 m in places.

Authors:
;
Publication Date:
Research Org.:
EG and G Idaho, Inc., Idaho Falls, ID (United States)
OSTI Identifier:
6837047
Report Number(s):
GEND-INF-012
ON: DE84012366
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; THREE MILE ISLAND-2 REACTOR; REACTOR CORES; ULTRASONIC TESTING; DAMAGE; DATA ACQUISITION SYSTEMS; REACTOR ACCIDENTS; REACTOR SAFETY; ACCIDENTS; ACOUSTIC TESTING; ENRICHED URANIUM REACTORS; MATERIALS TESTING; NONDESTRUCTIVE TESTING; POWER REACTORS; PWR TYPE REACTORS; REACTOR COMPONENTS; REACTORS; SAFETY; TESTING; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220900* - Nuclear Reactor Technology- Reactor Safety; 210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled

Citation Formats

Beller, L S, and Brown, H L. Design and operation of the core topography data acquisition system for TMI-2. United States: N. p., 1984. Web. doi:10.2172/6837047.
Beller, L S, & Brown, H L. Design and operation of the core topography data acquisition system for TMI-2. United States. https://doi.org/10.2172/6837047
Beller, L S, and Brown, H L. 1984. "Design and operation of the core topography data acquisition system for TMI-2". United States. https://doi.org/10.2172/6837047. https://www.osti.gov/servlets/purl/6837047.
@article{osti_6837047,
title = {Design and operation of the core topography data acquisition system for TMI-2},
author = {Beller, L S and Brown, H L},
abstractNote = {Development of effective procedures for recovery from the 1979 accident at the Three Mile Island 2 nuclear station requires a detailed and quantitative description of the postaccident configuration of the core. This report describes the techniques, equipment, and procedures used for making precise ultrasonic, sonar-like measurements of the cavity left in the upper core region as a result of the accident and details the primary results of the measurements. The system developed for the measurements uses computer techniques for the command and control of remote mechanical and electronic equipment, and for data acquisition and reduction. The system was designed, fabricated, and tested; procedures developed; and personnel trained in 4-1/2 months. The primary results are detailed topographic maps of the cavity. A variety of visual aids was developed to supplement the maps and aid in interpreting companion videotape surveys. The measurements reveal a cavity of 9.3 m/sup 3/, approximately 26% of the total core volume. The cavity occupies most of the full diameter of the core to an average depth of about 1.5 m and approaches 2 m in places.},
doi = {10.2172/6837047},
url = {https://www.osti.gov/biblio/6837047}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 1984},
month = {Tue May 01 00:00:00 EDT 1984}
}