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Significance and Use
When zirconium materials are used in nuclear applications, it is necessary that hafnium, a neutron absorber, be present only at very low concentrations.
This test method is useful in testing materials for compliance with the compositional requirements as given in Specifications B 349/B 349M, B 350/B 350M, B 351/B 351M, B 352/B 352M, B 353, B 493, B 494/B 494M, B 495, B 523/B 523M, B 550/B 550M, B 551/B 551M, B 653/B 653M, B 658/B 658M, B 752, and B 811.
1.1 This test method covers the determination of hafnium in zirconium and zirconium alloys in concentrations greater than 0.003 %.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B349/B349M Specification for Zirconium Sponge and Other Forms of Virgin Metal for Nuclear Application
B350/B350M Specification for Zirconium and Zirconium Alloy Ingots for Nuclear Application
B351/B351M Specification for Hot-Rolled and Cold-Finished Zirconium and Zirconium Alloy Bars, Rod, and Wire for Nuclear Application
B352/B352M Specification for Zirconium and Zirconium Alloy Sheet, Strip, and Plate for Nuclear Application
B353 Specification for Wrought Zirconium and Zirconium Alloy Seamless and Welded Tubes for Nuclear Service (Except Nuclear Fuel Cladding)
B493 Specification for Zirconium and Zirconium Alloy Forgings
B494/B494M Specification for Primary Zirconium
B495 Specification for Zirconium and Zirconium Alloy Ingots
B523/B523M Specification for Seamless and Welded Zirconium and Zirconium Alloy Tubes
B550/B550M Specification for Zirconium and Zirconium Alloy Bar and Wire
B551/B551M Specification for Zirconium and Zirconium Alloy Strip, Sheet, and Plate
B614 Practice for Descaling and Cleaning Zirconium and Zirconium Alloy Surfaces
B653/B653M Specification for Seamless and Welded Zirconium and Zirconium Alloy Welding Fittings
B658/B658M Specification for Seamless and Welded Zirconium and Zirconium Alloy Pipe
B752 Specification for Castings, Zirconium-Base, Corrosion Resistant, for General Application
B811 Specification for Wrought Zirconium Alloy Seamless Tubes for Nuclear Reactor Fuel Cladding
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E1097 Guide for Determination of Various Elements by Direct Current Plasma Atomic Emission Spectrometry
ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)
UNSPSC Code 12141751(Zirconium Zr); 41115403(Spectrometers)