scholarly journals Comment issue N-Reactor startup physics test program test procedures -- approach to critical and minimum critical size

1963 ◽  
Author(s):  
J.W. Hagan
Keyword(s):  
Critical Size ◽  
Test Program ◽  
Test Procedures ◽  
Program Test

THE EVALUATION OF BEEF BULLS FROM AN ORGANIZED PROGENY TEST PROGRAM

1980 ◽  
Vol 60 (3) ◽  
pp. 621-626 ◽  
Author(s):  
L. R. SCHAEFFER ◽  
HOON SONG ◽  
J. W. WILTON
Keyword(s):  
Monitoring Program ◽  
Best Linear Unbiased Prediction ◽  
Progeny Test ◽  
Progeny Testing ◽  
Test Program ◽  
Linear Unbiased Prediction ◽  
Testing Program ◽  
Best Linear Unbiased ◽  
Computational Procedures ◽  
Program Test

Three methods of evaluating beef sires for weaning weight with data obtained from an organized young sire progeny testing program were compared. Information from Agriculture Canada’s National Beef Sire Monitoring Program was utilized along with computational procedures based on best linear unbiased prediction. The methods were applied to data from the Canadian Simmental Association as an illustration of the methods. A model which incorporates the proofs of the reference sires into the comparisons with test bulls was considered more appropriate than the other two models compared. The results also showed that even in an organized progeny test program, test bulls are not truly mated to cows of equal merit or across equal herd environments.

An Analytical and Experimental Evaluation of the Damping Capacity of Sandwich Beams With Viscoelastic Cores

1967 ◽  
Vol 89 (3) ◽  
pp. 438-443 ◽  
Author(s):  
I. W. Jones ◽  
V. L. Salerno ◽  
A. Savacchio
Keyword(s):  
Previous Investigation ◽  
Equations Of Motion ◽  
Free Vibrations ◽  
Vibration Damping ◽  
Damping Capacity ◽  
Sandwich Beams ◽  
Natural Boundary ◽  
Test Program ◽  
Test Procedures ◽  
Natural Boundary Conditions

A study is made of the free vibrations of sandwich beams with viscoelastic cores. The study, which is a generalization of a previous investigation by the authors [1] includes the equations of motion and natural boundary conditions, derivation of expressions for the modal distribution of damping based upon “small damping” assumptions, numerical examples, and a supporting test program. The generally high values calculated for beams of various materials indicate that this type of construction is efficient for vibration damping applications. It was found, however, that the calculated and test values were not in accord. This lack of agreement signifies the necessity for greater refinement in both analytical methods and test procedures.

A Coating Evaluation Testing Program★

CORROSION ◽  
1958 ◽  
Vol 14 (12) ◽  
pp. 18-24 ◽  
Author(s):  
E. R. ALLEN
Keyword(s):  
Field Performance ◽  
Service Performance ◽  
New Materials ◽  
Test Program ◽  
Test Procedures ◽  
Controlled System ◽  
Field Service ◽  
Laboratory Results ◽  
Laboratory Procedures ◽  
Selection Of

Abstract A program to test and evaluate external pipeline coatings is described. When this program was started ten years ago, many methods and procedures then in use did not give all of the information desired. Field burial tests are lengthly and because of the variable conditions which govern results can neither be controlled nor evaluated with any precision. Only laboratory type tests are suitable for a closely controlled system of coating evaluation. Laboratory results must be correlated with field service performance. This test program was in three phases: First, laboratory procedures and apparatus were developed. Second, commonly used coatings were tested ana laboratory results correlated with field performance data. Third, new materials were tested and their performance compared with coatings in common use. Laboratory and field test procedures and apparatus are described. A discussion on the application of test data to selection of pipeline coatings is included. 2.1.2

Fluid Pressure Drop Testing on Once-Through Boilers

1974 ◽  
Vol 96 (1) ◽  
pp. 56-58
Author(s):  
K. D. Brummel ◽  
A. S. Buchanan
Keyword(s):  
Pressure Drop ◽  
Fluid Pressure ◽  
Supercritical Pressure ◽  
Test Program ◽  
Test Procedures ◽  
Analysis Techniques ◽  
Waterwall Tube

Boiler pressure drop testing has become a useful tool in evaluating the internal waterwall tube deposition on two once-through supercritical pressure boilers. This paper presents the results of five years of testing and describes test procedures, instrumentation requirements, and analysis techniques. The result of this test program has been the minimizing of unit forced outages due to waterwall tube failures.

scholarly journals Effective Diaphragm Area Test Program for Air-Operated Valve Actuators

2014 ◽  
Author(s):  
Zachary Leutwyler ◽  
Lisa Thidavanh ◽  
Neal Estep
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Regulatory Commission ◽  
Test Program ◽  
Test Procedures ◽  
Regulatory Issue ◽  
Independent Test ◽  
Manufacturing Tolerances ◽  
Regulatory Commission ◽  
Different Sources

Kalsi Engineering, Inc. (KEI), initiated an independent test program that includes a number of actuator manufacturers, models, and sizes based on a survey of United States (U.S.) nuclear power plants. The test matrix includes evaluation of the effect of the key parameters on the effective diaphragm area (EDA) throughout the stroke. These parameters include stroke position, pressure, materials, measurement uncertainty, and manufacturing tolerances. Because of differences in the test data obtained by different sources for the same actuator type and size, systematic test procedures have been developed by KEI to address differences in the testing methods and test configurations, including testing of a balanced actuator (no spring in the actuator) vs. a spring-return actuator of the same diaphragm size. The effect of elevated temperature and aging may also be included later by testing a selected number of actuators based on industry input. The benefit of this program is to provide reliable data for air-operated valve (AOV) design-basis evaluations as required by U.S. Nuclear Regulatory Commission (NRC) Regulatory Issue Summary (RIS) 2000–03. This paper presents the results for the Masoneilan Model 38 Size 18 diaphragm actuator, which show that EDA is both position- and pressure-dependent. Paper published with permission.

Precision and bias in quantitative EDS: ASTM results

1992 ◽  
Vol 50 (2) ◽  
pp. 1654-1655
Author(s):  
John J. Friel
Keyword(s):  
Stainless Steel ◽  
Quantitative Analysis ◽  
Mechanical Alloy ◽  
Dead Time ◽  
Test Program ◽  
Round Robin Test ◽  
Wide Range ◽  
American Society ◽  
Takeoff Angle ◽  
Standardless Analysis

Committee E-04 on Metallography of the American Society for Testing and Materials (ASTM) conducted an interlaboratory round robin test program on quantitative energy dispersive spectroscopy (EDS). The test program was designed to produce data on which to base a precision and bias statement for quantitative analysis by EDS. Nine laboratories were sent specimens of two well characterized materials, a type 308 stainless steel, and a complex mechanical alloy from Inco Alloys International, Inconel® MA 6000. The stainless steel was chosen as an example of a straightforward analysis with no special problems. The mechanical alloy was selected because elements were present in a wide range of concentrations; K, L, and M lines were involved; and Ta was severely overlapped with W. The test aimed to establish limits of precision that could be routinely achieved by capable laboratories operating under real world conditions. The participants were first allowed to use their own best procedures, but later were instructed to repeat the analysis using specified conditions: 20 kV accelerating voltage, 200s live time, ∼25% dead time and ∼40° takeoff angle. They were also asked to run a standardless analysis.

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