Home>ASTM Standards>ASTM C757-16(R2021) pdf free download

ASTM C757-16(R2021) pdf free download

ASTM C757-16(R2021) pdf free download.Standard Specification for Nuclear-Grade Plutonium Dioxide Powder for Light Water Reactors
1. Scope
1.1 This specification covers nuclear grade PuO 2 powder. It applies to PuO 2 of various isotopic compositions as normally prepared by in-reactor neutron irradiation of natural or slightly enriched uranium or by in-reactor neutron irradiation of recycled plutonium mixed with uranium. 1.2 There is no discussion of or provision for preventing criticality incidents, nor are health and safety requirements, the avoidance of hazards, or shipping precautions and controls discussed. Observance of this specification does not relieve the user of the obligation to be aware of and conform to all applicable international, national, or federal, state, and local regulations pertaining to possessing, shipping, processing, or using source or special nuclear material. For examples in the U.S. Government, relevant documents are Code of Federal Regulations, Title 10 Nuclear Safety Guide, U.S. Atomic Energy Commission Report TID-7016 2 , and “Handbook of Nuclear Safety”, H. K. Clark, U.S. Atomic Energy Commis- sion Report, DP-532 2 . 1.3 The PuO 2 shall be produced by a qualified process and in accordance with a quality assurance program approved by the user. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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.
5. Chemical Composition
5.1 Plutonium Content—The minimum Pu content shall be 86.0 weight % including measurement uncertainties as sampled on the date of sampling. 5.2 Uranium Content—The uranium content of the PuO 2 shall be measured and reported on a Pu basis. 5.3 Americium Content—The americium (Am) content shall be measured and reported on a Pu basis. The maximum acceptable Am content shall be agreed upon between the buyer and seller. 5.4 The dates of analyses of U, Th and Am shall be recorded. 5.5 Impurity Content—The impurity content shall not ex- ceed the individual element limit specified in Table 1 on a Pu basis. Total non-volatile oxide impurity content excluding Am shall not exceed 6000 µg/g Pu. Some other elements such as those listed in Table 2 may also be ofconcern for the buyer and should be measured and reported if requested. If an element analysis is reported as “less than” a given concentration, this “less than” value shall be used in the determination of total impurities. Impurity elements measured and their associated limits may differ from what is listed in this specification as agreed upon between the buyer and seller. 5.6 Moisture Content—The moisture content shall be mea- sured and reported on a Pu basis. The maximum acceptable moisture content shall be agreed upon between the buyer and the seller. 5.7 Equivalent Boron Content—For thermal reactor use, the total equivalent boron content (EBC) shall not exceed 20.0 µg/g on a Pu basis. The method of performing the calculation shall be as indicated in Practice C1233. For fast reactor use, the above limitation on EBC does not apply. 5.8 Gamma Activity—The gamma activity (Bq/g Pu) of the gamma emitting fission products whose isotopes have half lives of 30 days or greater shall be measured. The gamma radiation from fission products shall be less than 10 5 MeV·Bq/g Pu. 5.8.1 The list of nuclides and mean energies per disintegra- tion found in Test Method C1295 are to be used in the calculations.

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