Maintenance philosophy

The field development plan s prime purpose is to serve as a conceptual project specification for subsurface and surface facilities, and the operational and maintenance philosophy required to support a proposal for the required investments. It should give management and shareholders confidence that all aspects of the project have been... 

It is worth noting that typically personnel and logistics represent 30% to 50% of operating costs while maintenance costs represent 20% to 40% of operating costs. These are particular areas in which cost control and reduction should be focused. This may mean reviewing the operations and maintenance philosophies discussed in Section 11.0, to check whether they are being applied, and whether they need to be updated. 

The American faciUties also differed fundamentally from the British faciUties in regard to maintenance philosophy. The American plants were designed to employ remote maintenance, ie, to remove and replace equipment using shielded cranes operating inside the shielded stmcture. The British developed a contact approach based on simplified designs for equipment downstream of the fission product removal step. The British approach has been used at all commercial faciUties. 

What is the maintenance philosophy of the system This dictates what sort of protection schemes and physical design would match the application. 

Location, quality of supply, as well as maintenance philosophy must be included in the design. 

Because portable computers often require a completely different maintenance philosophy, we ll discuss them in a separate section near the end of this chapter they are also discussed in Chapter 2, "PC Architecture."... 

The alternative to the direct-maintenance philosophy is the canyon using remotely removable equipment as used in the early U.S. plants at Hanford and SRP. This has proved successful but requires more space and is of a more complex design. 

The adoption of the direct-maintenance philosophy sets criteria for the design engineer that affect not only the plant design but that of the process as well. 

Planned maintenance or regular replacement of plant equipment to avoid failure by corrosion is an essential adjunct to design and constitutes the third phase of control. The factors contributing to a policy of planned maintenance philosophy are (i) predictable and reasonable rate of corrosion for material (ii) discounted cash flow advantage over life of plant in using a cheaper less-resistant material (iii) factors other than corrosion dictating regular maintenance (iv) no feasible alternative to corrodible material (v) installed spare preferred policy for reliability of plant. 

The novel features of the Hope plant are continuous dissolving relaxed, yet safe, criticality criteria sampling only for process control a realistic approach to waste storage and a new operating-maintenance philosophy. 

In the proposed design the processing plant is a concrete-lined pit which has a capacity of about 100,000 gallons. It is located outdoors and the top of the pit is formed of rolling concrete shielding blocks. The plant is operated dry but when maintenance is necessary the cells can be flooded with water. We have developed tools for the simple maintenance jobs which we know will be necessary and, in general, are very enthusiastic about the simplicity of design which is possible because of the maintenance philosophy. 

A maintenance philosophy is defined as the system of principles for the organization and execution of the maintenance (ISO/IEC 2002), and is a high-level description of the overall principles for the maintenance management (Nordgird et al. 2005). 

The principles stated above represent the essence of the companies maintenance philosophy. 

The maintenance philosophy gives the overall principles for how to maintain the system as a whole. To make the philosophy operational, the principles need to be applied to the specific parts or components constituting the system. 

Annual company analysis - evaluating the degree of implementation of maintenance philosophy, the effect of maintenance, etc. 

The distribution companies have so far not come far in analysing and reporting of maintenance achievements, but it is regarded as a crucial part of making the maintenance philosophy operational, and it elaborated more closely in the time to come. 

Greater reliance on leasing rather than ownership of aircraft. The OTA (1988) found that leasing affects maintenance philosophy, particularly near the end of the lease period. For example, leasing increases the reliance on periodic inspections...in lieu of permanent fixes (pg. 108), and is associated with reduced treatment of corrosion. 

As applicable, detailed SIL calculations are performed and this needs to be scrutinized and verified to ensure that the proposed design and associated testing and maintenance philosophy achieve the selected safety availability (SIL) targets. For these calculations equipment database shall be utilized and help from software may... 

Safety factors greatly depend on company culture, safety attitudes, and maintenance philosophy. There are huge numbers of equipment from several... 

The maintenance revolution at electric utilities. Douglas has described the changing maintenance philosophy at electric utilities. The maintenance revolution in electric utility operations has been driven by several factors. A brief summary of these follows ... 

Has a maintenance philosophy been established that defines the balance between inspection, preventive maintenance and repair ... 

The placement and design of the steam generators will be dictated to a major degree by the maintenance philosophy adopted. One general... 

Maintenance concept. Both dry and underwater removal methods have been investigated for the HRR however, both schemes present difficult design problems. Dry-maintenance philosophy, chosen on a somewhat arbitrary basis, has been followed in the layouts presented herein. 

A preliminary analysis of the two reactor concepts, single-fluid and two-fluid, resulted in the decision to use three external loops for the singlefluid and six for the two-fluid reactor. Por both these alternates the maintenance philosophy selected was that of removal and replacement by horizontal transfer of a complete primary loop upon failure of any major component in the loop [5]. Thus, for arrangement purposes, the primary loops assume the shape of a rail-mounted horizontal containment vessel, or capsule, sized to contain all loop components. The height of the capsules relati e to the leactor is dictated by an economic balance between height or elewition costs and pump net positive suction head. 

Reactor maintenance has a primary role in ensuring safe and reliable plant operation. To carry out this role, a strong maintenance philosophy and culture (a set of standards, values, and convictions) based on sound and respected principles should be developed at all nuclear facilities. 

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