By W. P. Worden (auth.), Marilyn M. Osterhout (eds.)
This quantity comprises the invited and contributed papers pre sented on the American Nuclear Society (ANS) assembly on Decontamina tion and Decommissioning (D & D) of Nuclear amenities, held Septem ber 16-20, 1979, in solar Valley, Idaho. This was once the 1st U. S. assembly of the ANS which addressed either one of those very important and comparable matters. The assembly was once attended by way of greater than four hundred engineers, scientists, laymen, and representatives of federal, kingdom, and native governments, together with members from 11 overseas nations. The technical periods incorporated a number of classes focusing on ongoing D & D courses within the U. S. and overseas. additionally, "new floor" was once damaged in such components as decommissioning expenditures and value restoration, complex courses on reactor coolant filtration, and different components of continuous and extending value to the nuclear and to shoppers. the twin sponsorship of the assembly (The ANS Reactor Operations department and the japanese Idaho component of the ANS) helped spur a top quality software, a delightful place, and a excessive measure of suc cess in technical interchange among the attendees. As visitor speaker, we have been venerated to have Mr. Vince Boyer of Philadelphia electrical corporation. Mr. Boyer is either a prior chairman of the ANS Reactor Operations department and a earlier president of the yankee Nuclear Society. His perspectives at the nuclear and of its present prestige have been informative and interesting.
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Some site procedures require handwiping of all equipment to be cleaned by ultrasonics to reduce the concentration of particulates in the solvent. The cleanup filter should be shielded to provide radiation exposure control to the operator. Recirculation should be less than 2% of the REVIEW OF PLANT DECONTAMINATION METHODS 37 tank volume per minute. Higher flow rates may introduce solution turbulence which can interfere with the ultrasonic waves and reduce the decontamination effectiveness. The arrangement of components in the ultrasonic bath as well as the number should be carefully monitored during each cleaning.
If the materials of construction exhibit unsatisfactory corrosion behavior, either different chemicals or a different decontamination technique should be chosen or a corrosion inhibitor added to the decontamination reagent. DECONTAMINATION OF MISCELLANEOUS TOOLS AND EQUIPMENT Survey participants identified six decontamination techniques for use on miscellaneous tools and equipment. The two techniques mentioned most often were hand scrubbing and ultrasonics. Hand Scrubbing Almost every plant surveyed stated that hand scrubbing has a role in their decontamination program.
Those who now enjoy the benefits of this technology can do no less than to assure that it will not impose an unreasonable financial burden on future ratepayers. "Although the total amount determined to be needed may not be accurate, the rejection of the claim would ignore the vital issues of health and safety which are reasonably foreseeable. " It was the overriding health and safety issues attached to decommissioning which the Commission used to distinguish it from the Penn-Sheraton case findings.
Decontamination and Decommissioning of Nuclear Facilities by W. P. Worden (auth.), Marilyn M. Osterhout (eds.)