ASME PTC 19.11:1997 pdf download

12-12-2022 comment

ASME PTC 19.11:1997 pdf download Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle
2.1 INTRODUCTION Sample point and analysis selection depend upon the purpose of testing. Each cycle component has a particular function. An agreement between the buyer and seller defines the specification.
The sam- pling and analysis are designed to determine that the component is functioning as specified and that it is functioning properly in operation. Proper func- tion is determined completely in a performance test by analyzing the sample to ascertain that all specifications are met. In operation the proper func- tion is assessed by less complete testing that concen- trates on the most important impurities and on the most likely fai lures.
This Section focuses on the selection of sample point locations and the analyses that are commonly conducted for those locations. Most of the sample points are concerned with water quality assurance and equipment performance evaluation. For these points, continuous analysis i s preferred. A few points are present largely to provide special data for analysis of problems. Grab samples will usually suffice at these points. Section 6 focuses on the analyses, their meaning, and the methods.
The following discussion reviews components of a thermal power cycle that can affect the chemistry of the water and steam. Figure 2.1 shows these components and sampling points schematically for a generalized fossil cycle. The steam cycle of nuclear power plants is similar to the fossil plants except that many nuclear plants do not have a deaerating feedwater heater and most nuclear plants have a moisture separator reheater that extracts moisture from the steam and superheats the vapor. Not all these components will necessarily be present in a particular application. Their presence in Fig. 2.1 does not imply that they are always needed.
Table 2.1 summarizes the sample points and the analyses. The text and Table 2.1 suggest more analyses than most plants would use. They should be used as a guide for consideration of analyses at each location. For proper testing, a sample must be provided at each cycle point for which there is a specification. Figures for other fossil cycles and for the BWR cycle can be found in Chapter 1 7 of the ASME Handbook on Water Technology for Thermal Power Systems (1 ).
Diagrams of PWR secondary cycles can be found in PWR Secondary Water Chemistry Guidelines – Revision 3 (2). Boiling water reactor systems are discussed, but the special problems associated with the radioactivity and gas concentrations in the water are not addressed here. In BWR systems, no pH control additives are present, therefore, specific conductivity is the only conductivity measurement used. Oxygen, chloride, and sulfate are the only other common analyses. When zinc i s added to the reactor to control radia- tion, a zinc analysis will be performed.
In systems with copper alloys in the condenser or feedwater heaters, the analysis of copper will commonly be appropriate. In all-ferrous systems, the analysis of copper will usually not be appropriate, but occasional analysis may be desired to be sure that no copper is entering the system from unsuspected sources.

                                           Related Information                                             Download
PS:Thank you for your support!
ASME B107.100:2002 pdf download ASME Standards

ASME B107.100:2002 pdf download

ASME B107.100:2002 pdf download WKENGHLD INCORPORATING ASME B107.6, ASME B107.9, ASME B107.39, and ASME B107.40 4.5 Proof Torque When tested as specified, wrenches shall withstand the proof torque specified in the applicable tables without failure or permanent...
Read More
ASME BPE:2002 pdf download ASME Standards

ASME BPE:2002 pdf download

ASME BPE:2002 pdf download BIOPROCESSING EOUIPMENT GR-1 INTRODUCTION This Standard provides the requirements applicableto the design of bioprocessing equipment inciudingaspects related to sterilily and cleanability,dimensionsand tolcranccs, surfacc finish, material joining, andscals. Thcsc apply to: (a) componcnts that...
Read More
ASME N509:2002 pdf download ASME Standards

ASME N509:2002 pdf download

ASME N509:2002 pdf download NUCLEAR POWER PLANT UNITS AID CDMPONENTS 1 SCOPE This Standard covers requirements for the designconstruction, and qualification and acceptance testingof the air-cleaning units and components which makeup Engineered Safety Feature (ESF) and other...
Read More

LEAVE A REPLY

Anonymous netizen Fill in information