Aspects and criteria for the removal from regulatory control of low-level solid waste and materials

Atomic Energy ◽  
1998 ◽  
Vol 84 (4) ◽  
pp. 273-277
Author(s):  
L. P. Sukhanov
Author(s):  
Lyubov Yankovs'ka ◽  
Svitlana Novyts'ka ◽  
Alina Tsidylo

The volume and structure of solid domestic waste in Ternopil region are analyzed. Our research in the Baikivtsi Utc proves that community residents dump less organic waste in containers (about 20%, which is twice less than in the regional center) because they can compost food waste using it as fertilizer for personal use plots (gardens). The volumes of organic waste fluctuate significantly throughout the year: the largest amount of them ends up in containers from May to September. The community residents throw out the least of organic waste in winter. One of the reasons is that there is a gradual replacement of last year's harvest with a new one. The habitants of the Baikivtsi Utc throw more paper away during the warmer months. The following types of paper prevail: offset - 33%, newsprint - 29%, coated - 4%, cardboard - 12%, designer - 5%, packaging - 16%, self-adhesive - 1%. In winter, most of the paper is burned to heat buildings. Among the scrap are mostly cans and metal lids (from bottles and cans). Ferrous metal almost never gets into containers due to the fact that it is profitable to sort it out and there are no problems to hand over scrap metal, since scrap collectors often come to the villages and offer quite decent price for it (therefore, there is no need to waste time transporting the metal). The plastic waste of the community includes plastic bottles from water, oil, household chemicals, canisters, plastic bags and ets. Among the various types of plastic: Polyethylene terephthalate or PET - 17%; high-density polyethylene (HDPE) - 29%; polyvinyl chloride or PVC - 4%; low density polyethylene (LDPE) - 34%; polypropylene, PP or PE - 8%; polystyrene, PS - 6% and other - 2%. The research showed that the following types of glass prevail in the structure of the cullet of the Baikivtsi community: window glass - 8%, technical glass - 3%, Plexiglas - 5%, triplex - 3%, glass from chemicals - 1%, ceramics - 10%, bottles - 70 % The survey showed that only 3% of the community's residents completely sort garbage, about 80% of them sort it partially, and almost 20% do not sort waste at all (and 12% of them plan to do it in the future). The reasons for the low level of waste sorting are not surprising, since, in addition to the low level of environmental awareness of the residents, there no proper conditions for sorting solid waste. The environmental advantages of sorting and recycling solid domestic waste were evaluated. In particular, the volumes of biogas that can be formed from the annual volumes of solid waste accumulation in the Baikivtsi united territorial community of Ternopil region, as well as the assessment of the environmental efficiency of recycling waste paper, plastic, glass were calculated. The cost of the Baikivtsi Utc solid waste as a secondary material resource will amount to UAH 2,051,943 per year, which can be a significant profit for the community. Key words: solid domestic waste, united territorial community, sorting, utilization, recycling ecological culture.


1978 ◽  
Vol 35 (6) ◽  
pp. 817-834
Author(s):  
Shinsuke Morisawa ◽  
Yoriteru Inoue ◽  
Yoshiki Wadachi ◽  
Kiyoshi Kato

Author(s):  
José L. Revilla

Abstract Decommissioning nuclear power plant causes an enormous amount of radioactive waste with very low level of contamination. A risk optimisation analysis would indicate that some of these residual materials need not to be handled, processed or disposed of with any reference to their radioactivity content, in order to allow more beneficial allocation for the limited social resources. This analysis could also be applied to the site liberation once a particular facility is decommissioned, remedial or restoration actions should be subjected to an optimisation process for selecting the best strategy of remedial measures. In order to make this release from regulatory control possible, it is necessary to establish conditions for the site or for these materials to be managed during their later reuse or final disposal. Authorisation for this release or clearance of control is a responsibility of the competent authority and, in the case of Spain, is carried out by the CSN (Spanish Nuclear Safety Council) on an “ad hoc” case by case analysis. Some personal considerations linked with the exemption policy and the application of radiological protection principles and criteria to the release authorisation of sites and solid materials generated within a regulated facility are presented in the paper. The main aim of this paper is to present the management options for very low level waste materials that are considered in the case of the Dismantling and Closure Plan authorisation granted for Vandellós 1 NPP decommissioning project. A framework consisting of three basic possibilities to apply clearance appears in the mentioned authorisation: • A first set of unconditional clearance levels N1 expressed in terms of gross activity concentration and surface contamination has been issued for unrestricted release of materials. Derived unconditional generic clearance levels, based on published international guidance, are also accepted. • Generic use of derived conditional clearance levels N2, based on “ad hoc” internationally published guidance, has been established for particular waste streams managed in well defined non regulated practices (metallic scrap recycling and concrete demolition debris). • The applicant may also propose candidate materials for other non-regulated route management practice, for which specific conditional clearance levels N3 can be issued by the Nuclear Safety Council. In all cases, control procedures have to be imposed to the licensee producing the residual materials that can be verified by the Safety Authority. They are based on the certification of the radionuclide content supported by quality controls and maintenance of records. There is not an official criterion, until now, for the remediation of land and liberation of the site, but probably the same radiological analysis will be used when evaluating the restoration plan application. A kind of “rubblization” is being considered by the licensee, using the above-mentioned third possibility for conditional clearance of the rubble produced in the dismantling of some particular buildings.


Author(s):  
Aiguo Shang ◽  
Jin Qin ◽  
Changjie Lu

This paper presents the design of the low-level solid waste encapsulation device for the 200L barrels. The device is used to compress and package the low-level contaminated waste such as cotton goods, rubber, plastic products, leather products and paper products.


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