ASTM B349-16(R2021) pdf free download

ASTM B349-16(R2021) pdf free download.Standard Specification for Zirconium Sponge and Other Forms of Virgin Metal for Nuclear Application
1. Scope
1.1 This specification covers one grade of virgin zirconium metal commonly designated as sponge because of its porous, sponge-like texture, but it may also take other forms such as chunklets, suitable for use in nuclear applications. 1.2 Unless a single unit is used, for example corrosion mass gain in mg/dm 2 , the values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. SI values cannot be mixed with inch-pound values. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Forms: 3.1.1 chunklets, n—zirconium metal produced from the reduction of the chloride, usually by sodium. 3.1.1.1 Discussion—In this process, the reduced metal is melted and dripped onto a rotating disk to form chunklets. 3.1.2 sponge, n—zirconium metal produced from the reduc- tion of the chloride, usually by magnesium. 3.1.2.1 Discussion—The process is one where the metal condenses to the solid state and does not melt. 3.2 Lot Definition—a lot shall consist of a single blend produced at one time.
4. Classification
4.1 Primary zirconium is furnished in one grade designated as Reactor Grade R60001, suitable for nuclear applications. The main characteristic of the reactor grade is its low neutron capture cross section as achieved by removal of hafnium. The manufacturer must use procedures to prevent contamination with other high cross-section materials.
8. Sampling
8.1 This sampling method detailed in this section shall be considered the industry standard, but alternate methods are acceptable when agreed to by the manufacturer and the purchaser. All sampling methods shall be such that the analysis is representative of the sponge blend. 8.2 A blend of sponge shall be sampled by running a full quantity through a proportioner or splitter to obtain a repre- sentative sample of at least 1 % of the blend weight. The samples for chemical analyses shall be made on a compacted briquette and an evaluation ingot. The method for splitting this sample and preparing an evaluation ingot and compacted briquette shall be agreed upon between the manufacturer and the purchaser. 8.2.1 The evaluation ingot shall be greater than 30 lb (14 kg). 8.2.2 The compacted briquette shall be at least 1 lb (0.5 kg). 8.3 When specified in the purchase order, a duplicate sample or portions of the briquette and evaluation ingot shall be supplied to the purchaser. 8.4 For metal forms other than sponge, such as chunklets, the sampling procedures shall be as agreed upon between purchaser and manufacturer.
9. Methods of Chemical Analysis
9.1 The preparation and analytical methods detailed in this section shall apply for the industry standard sampling methods detailed in Section 8. Alternate methods are acceptable when agreed to by the manufacturer and the purchaser. At a minimum, analytical samples must consist of a melted solid metal sample and an unmelted sponge sample. The solid sample shall be analyzed for all elements listed in Table 1 except for chlorine, magnesium or sodium which must be analyzed from the unmelted sponge sample. All preparation and analytical methods shall be such that the analysis is representative of the sponge blend. 9.2 Preparation ofSample: 9.2.1 Compact the sponge sample taken in accordance with Section 8 into a consumable electrode and melt to ingot form in an arc furnace of a type conventionally used for reactive metals. The ingot shall be prepared for analysis by either of the following two methods