Decommissioning Concept

Under the decommissioning concept, the plant is to be decommissioned completely to green field conditions in ten steps, i.e. under the corresponding ten decommissioning permits. To this day, nine decommissioning permits have been issued, the first one in 1993 and the most recent one, number nine, in 2001. 

Decommissioning concept for the high temperature reactor THTR-300 Kerntechnik 56(1991), Page 362-366, No. 6... 

This section of the SAR should briefly discuss the proposed decommissioning concept, with the following aspects taken into account ... 

Another essential difference Is including the NPP life extension direction into the general decommissioning Concept. But being the subject of another IAEA programme this direction will not be considered here. 

Process life cycle All phases of a process from its conception through chemical and process research and development (R D). engineering design, construction, commissioning, commercial operation, major modification, and decommissioning. 

IMPLEMENTATION OE THE CONCEPT AND THE PROGRAM OF COMPLEX DECOMMISSIONING OF NUCLEAR SUBMARINES, NUCLEAR-POWERED SURFACE SHIPS AND MAINTENANCE VESSELS AND REHABILITATION OF RADIATION-HAZARDOUS FACILITIES MAIN RESULTS AND UNRESOLVED PROBLEMS... 

Concept of Complex Decommissioning of Nuclear Submarines approved by Minister of RF Minatom and prescribed as the guide to action by RF Government Order IK-P7-02738 of 17.02.2001 ... 

CONCEPT OF COMPLEX DECOMMISSIONING OF CIVIL NUCLEAR POWERED SURFACE SHIPS AND MAINTENANCE VESSELS... 

Main factors influencing the choice of the concept of complex decommissioning of nuclear-powered surface ships (NPSS)... 

The stages that a physical process or a management system goes through as it proceeds from birth to death. These stages include conception, design, deployment, acquisition, operation, maintenance, decommissioning, and disposal. 

A concept of an evolutionary reactor is pursued with the joint French / German European Pressurized Water Reactor , EPR, a 1525 MW(e) plant with evolutionary steam generating system and innovative double-walled containment [20]. A three years basic design phase as a prerequisite for the beginning of the licensing procedure was finished in 1997. The characteristic feature is a core catcher to restrict a possible core melt to the power plant itself. The joint effort by Germany ind France, however, finds in both countries a situation where no further base load is required. The EPR, confirmed as a future standard in France, is projected to substitute decommissioned nuclear plants. 

The Validation Plan is the overall controlling validation document for the OCS and will be the first document created as part of the validation life cycle (Figure 6.4). The overall purpose of the Validation Plan is to define the approach that is to be taken to validate the system and to establish controls to ensure that satisfactory validation of the system is achieved. The Validation Plan is a live document for the full life cycle of the system (i.e., from concept to decommissioning). 

We recognize that one of the major challenges will be to accomplish these goals with an economically viable system. Today s economic approach to nuclear power is throu economies of scale. Our concept approaches the economic issue from a different perspective we rely on the economics of mass production, coupled with cost savings achieved from dramatically reduced onsite installation, operation and decommissioning costs, reduced site infiastructure requirements, and simplified type licensing to overcome the loss of economies of scale. 

The third element of a safety case is the ESA. The ESA requires the identification and evaluation of hazards over the life of the project from the initial feasibility study through the concept design stage, to construction and commissioning, then to operation, decommissioning, and abandonment of the facility. The FSA is a demonstration that, so far as is reasonably practicable, the risks to personnel have been minimized. It should ... 

Hazard identification and evaluation procedures should be applied to all relevant stages from project conception through to decommissioning, including ... 

The lEC 61508 is a generic standard for elec-trical/electronic/programmable electronic (E/E/PE) safety-related systems. It should be applied from the concept rmtil the disposal or decommissioning of the product if a possible failure of a system can lead to hazards for humans and/or the environment. During this product life cycle the application of the lEC 61508 is ordered using an overall safety lifecycle. The standard is a generic standard and thus is used to derive domain specific standards as described in section 1. 

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