Risks Encountered in Nuclear Decommissioning and Their Applicability to Nuclear Submarine Decommissioning

Author(s):  
Philip K. Jackson
Kerntechnik ◽  
2005 ◽  
Vol 70 (1-2) ◽  
pp. 9-13
Author(s):  
R. D. Wendling ◽  
M. Paul

2000 ◽  
Vol 14 (2) ◽  
pp. 211-233 ◽  
Author(s):  
James R. Boatsman ◽  
Inder K. Khurana ◽  
Martha L. Loudder

This paper analyzes the accounting effects of the proposed standard Accounting for Obligations Associated with the Retirement of Long-Lived Assets, and considers the economic effects of accounting data in electric utility rate-making. Specifically, we model the financial statement with respect to nuclear decommissioning costs and posit several likely scenarios for the economic implications for the affected firms, their electric consumers, and the rate regulators. The model reveals that the sign of the equity adjustment at adoption and the change in ongoing expense will depend on (1) the age of the plant, and (2) the ratio of the current cost estimate used to compute depreciation under the current practice and the estimated future decommissioning cost. When the model is applied to firms with nuclear plants, we find that the financial statement effects at adoption will be substantial for many firms, and that the ongoing effects of the standard will be to increase the reported expenses of decommissioning substantially. These findings are of interest for three reasons: first, contrary to our data, many of the firms analyzed have stated in their annual reports that the adoption effects of the proposed standard will be immaterial; second, the standard may have a deleterious effect on established regulatory rate-making relationships by changing the basis for consumer rates; and third, the analysis suggests that some firms will be faced with either requesting rate increases or jeopardizing their eligibility for special regulatory accounting treatment. Any of these outcomes create potentially severe problems in an industry on the brink of monumental economic and structural change, that is, the transition from a regulated monopoly to competition.


Author(s):  
Diletta Colette Invernizzi ◽  
Giorgio Locatelli ◽  
Naomi J. Brookes ◽  
Martin Grey

Project management literature has, until now, mainly focused on new build and only in the last decades the issues of decommissioning (mega) projects has arisen. To respond to this changing environment, project management will need to understand the challenges of decommissioning projects. Decommissioning projects within Oil & Gas, Chemical and Nuclear sectors are characterized by high costs, long schedules and uncertainty-based risks. The budget for Nuclear Decommissioning Projects and Programmes (NDPs) are subject to well publicized increases and, due to their relatively recent emergence, complexity and variety, key stakeholders lack a full understanding of the key factors influencing these increases. Benchmarking involves “comparing actual or planned practices [...] to identify best practices, generate ideas for improvement” [1] and offers significant potential to improve the performance of project selection, planning and delivery. However, even if benchmarking is the envisaged methodology to investigate the NDPs characteristics that impact on the NDPs performance, until now, it has only been partially used and there is a huge gap in the literature concerning benchmarking NDPs. This paper adapts a top-down benchmarking approach to highlight the NDPs characteristics that mostly impact on the NDPs performance. This is exemplified by a systematic quantitative and qualitative cross-comparison of two major “similar-but-different” NDPs: Rocky Flats (US) and Sellafield (UK). Main results concern the understanding of the alternatives of the owner and/or the contractors in relation to (1) the physical characteristics and the end state of the nuclear site, (2) the governance, funding & contracting schemes, and (3) the stakeholders’ engagement.


1974 ◽  
Vol 60 (3) ◽  
pp. 137-142
Author(s):  
P. H. Marsden ◽  
R. J. Fallon ◽  
R. T. Larsen

AbstractBacteriological surveys of the crews of both Royal Navy and United States nuclear submarine crews, who were engaged in extended patrols in an isolated environment, revealed an unexpectedly high level of nasopharyngeal meningococci when selective med’a was used and an, as yet, unexplained increase in the level of resistance of the organism to sulphadiazine during the period of patrol.Results from British and United States personnel showed very similar carrier rates, with the exceptions of ant’genic groups and sulphadiazine sensitivity.


Energy Policy ◽  
2019 ◽  
Vol 124 ◽  
pp. 226-261 ◽  
Author(s):  
Rebekka Volk ◽  
Felix Hübner ◽  
Tobias Hünlich ◽  
Frank Schultmann

Author(s):  
M D'Amico ◽  
O Dufaud ◽  
L Perrin ◽  
S Trélat ◽  
J Latché

Author(s):  
П.А. ФАЙМАН ◽  
М.В. БУДЯНСКИЙ ◽  
М.Ю. УЛЕЙСКИЙ ◽  
С.В. ПРАНЦ ◽  
В.Л. ВЫСОЦКИЙ ◽  
...  

Представлены результаты лагранжевого моделирования распространения радиоактивного загрязнения в Уссурийском заливе на различных горизонтах по глубине на основе численной региональной модели циркуляции ROMS с использованием эмпирических данных выпадения радиоактивных осадков из атмосферы на поверхность акватории в день аварии на атомной подводной лодке в бухте Чажма 10 августа 1985 г. Показано, что радиоактивное пятно могло оставаться в Уссурийском заливе в течение первых четырех суток после аварии. Установлено, что эволюция и деформация начального пятна загрязнения на разных горизонтах обусловлены влиянием вихрей разных полярностей и размеров (мезомасштабный циклон в центре залива, субмезомасштабный антициклон на севере и мезомасштабный антициклон на юге) и лагранжевых когерентных структур, связанных с гиперболическими точками в заливе. The results of Lagrangian modeling of the transport of radioactive pollution in the Ussuri Gulf at various depths based on a regional ROMS numerical model of circulation using the empirical data on the radioactive fallout from the atmosphere at the sea surface on the day of the accident at a nuclear submarine in the Chazhma Bay in August 10, 1985. It was shown that the radioactive particles remain in the Ussuri Gulf for the first 4 days after the accident. It has been shown that the evolution and deformation of the initial pollution patch on various horizons was influenced by vortices of different polarity and size in the Ussuri Gulf (a mesoscale cyclone in the center of the Gulf, a sub-mesoscale anticyclone in the north and a mesoscale anticyclone in the south) and by Lagrangian coherent structures connected with hyperbolic points in the Gulf.


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