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ASTM Selected Technical Papers
Power Plant Instrumentation for Measurement of High-Purity Water Quality
By
RW Lane
RW Lane
1
Illinois State Water Survey
,
Urbana, Ill. 61801
;
symposium chairman and editor
.
Search for other works by this author on:
G Otten
G Otten
2
Puricons, Inc.
,
Berwyn, Pa. 19312
;
symposium chairman and editor
.
Search for other works by this author on:
ISBN-10:
0-8031-0798-6
ISBN:
978-0-8031-0798-4
No. of Pages:
243
Publisher:
ASTM International
Publication date:
1981

The high level of sophistication required for the continuous monitoring of water quality in central stations follows from the need to produce ultrapure steam. Although there may not be agreement on the precise levels of contamination that are tolerable in steam, there is concensus that the levels are extremely low—so low, in fact, that it is questionable whether commercially available instrumentation has been adequate for the job.

During the past 5 years or so, the disastrous consequences of caustic and sodium chloride in steam have been emphasized over and over, yet many central stations do not take advantage of the instrumentation that is available for monitoring these contaminants.

Once the steam requirements are established, the specifications for boiler water and feedwater follow in order. This paper outlines several monitoring schemes for the complete utility plant cycle which employ the best monitoring equipment currently available and discusses some of the reasons that improved instrumentation is required.

The author points out that there are frequently alternative methods for detecting contamination in condensate and describes how the most sensitive monitoring device is selected in each case.

1.
Steam Purity—Stress Corrosion Cracking
,” General Electric Publication No. GEK-72281,
General Electric Co.
,
Schenectady, N.Y.
,
23
10
1979
.
2.
Jonas
,
O.
,
Combustion
, Vol.
50
,
12
1978
, pp. 11-27.
3.
McCord
,
T. G.
,
Bussert
,
B. W.
,
Curran
,
R. M.
, and
Gould
,
G. C.
,
Materials Performance
, Vol.
15
,
02
1976
, pp. 25-34.
4.
McClintock
,
F. A.
and
Argon
,
A. S.
,
Mechanical Behavior of Materials
,
Addison-Wesley
,
Reading, Mass.
,
1966
, pp. 605-607.
5.
Lindsay
,
W. T.
, “
Physical Chemistry of Impurities in Steam Turbines
,” Paper presented at
Steam Turbine-Generator Technology Symposium
,
Charlotte, N.C.
, 4–5 Oct. 1978.
6.
Bussert
,
B. W.
,
Curran
,
R. M.
, and
Gould
,
G. C.
, “
The Effect of Water Chemistry on the Reliability of Modern Large Steam Turbines
,” ASME Paper 78-JPGC-Pwr-9,
American Society of Mechanical Engineers
,
Dallas, Tex.
, 10–14 Sept., 1978.
7.
Provenzale
,
G. E.
and
Skok
,
M. W.
,
Combustion
, Vol.
46
,
07
1974
, pp. 30-36.
8.
Lawlor
,
M.
and
Clark
,
C.
, “
An Experimental Investigation of Some of the Factors which Influence the Accuracy of Steam Sampling
,” ASME Paper 61-WA-266, presented at
Winter Annual Meeting of the American Society of Mechanical Engineers
,
New York, N.Y.
,
1961
.
9.
Cobb
,
R. V.
and
Coulter
,
E. E.
, “
The Prevention of Errors in Steam Purity Measurement Caused by Deposition of Impurities in Sampling Lines
,”
A.S.T.M. Proceedings
, Vol.
61
,
1961
.
10.
Martynova
,
O. I.
,
High Temperature, High Pressure Electrochemistry in Aqueous Solutions (NACE)
,
National Association of Corrosion Engineers
,
Houston, Tex.
,
1976
, p. 131.
11.
Noll
,
D. E.
, “
Factors that Determine Treatment for High Pressure Boilers
,”
Proceedings
,
American Power Conference
, Vol.
26
,
1964
, pp. 753-761.
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