As-built conditions

It is important during any ground gas assessment to consider whetiier tire data is representative of as-built conditions. For example, is there a surface clay layer overlying a gas source that will be penetrated by stone columns or piles tiiat allow gas to migrate to surface This is common on sites with alluvium where a clay layer overlies peat deposits at depth. In this case any assessment needs to consider the gas regime in the deeper source and how gas will migrate up the stone columns. 

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An important but sometimes overlooked evaluation is a check of the as-built conditions of a building. Modifications made since the original construction may not... 

On completion of installation, all documentation associated with the installation, calibration, and testing of the field instrumentation, along with any associated computerized control system documentation, should be collated by the project manager/engineer ready for IQ. Most of this documentation will be in the pre- as-built condition at this stage of the project and will, therefore, contain site (red line) markups. 

Operational Condition as-built condition should be carried... 

Another important side benefit of the hazards analysis process is that it puts management s feet to the fire with respect to developing up-to-date technical and process information. In particular, it ensures that the time and effort is spent on making sure that the P IDs and other drawings do indeed reflect the as-built condition of the unit. 

Baseline waikdown inspections shall be performed to establish (on the basis of a representative sample of safety systems) that the as-built conditions-correspond to the safety analysis. Safety-significant discrepancies identified by the TBP shall be evaluated and resolved prior to resUrt by the Restart Issues Management Program (RIMP) Committee. 

In conclusion, a representative sample of safety systems was inspected to establish the as-built conditions in the reactor plant. This information was then used as an input during the SAR upgrade. Also, all safety-significant discrepancies identified by the TBP have been evaluated and resolved by the RIMP committee. 

Phase III Analysis -- URS/Blume developed a Phase HI model that incorporated the design changes and as-built conditions. The Phase III analysis satisfies all of the restart criteria. 

DB 6.1 - Baseline Walkdowns -- Establish on representative sample of key safety systems by Technical Baseline Program (TBP) walkdowns that the as-built conditions correspond to the safety analyses. This item has been completed. Refer to SER Section 5.3 for a detailed evaluation of this item. 

PV systems consist of arrays of cells that ate interconnected in panels or modules to increase total power output. Often the systems include sun-tracking equipment, as well as power-conditioning equipment to convert dc to ac. The systems can range in size from a simple one-panel, fixed-orientation unit to a vast field of modules that accurately track the movement of the sun. Electric utiUties in Europe, Japan, and the United States have hosted several experimental PV power plants. The largest to date was a 5.5-MW plant at Carrisa Plains, California, built by Siemens Solar Industries (formerly ARCO Solar). 

Built-up Edge. At relatively low speeds in metal-cutting operations, the tool tip does not get hot enough for crater wear to be significant. Under these conditions the metal may, however, become welded to the tool tip as built-up edge (Fig. 2c). 

The two openings visible in the ceiling of the room today measure approximately 60 cm x 60 cm (the eastern opening),54 and 40 cm x 40 cm (the western opening).55 Both led to a wooden shaft in which a small chimney made of planks had been built. This shaft was closed by means of a lid, also made of wood, on the roof of the hut. Measured from the ceiling of the room, the chimney is approximately 1.15 m in height. Its present condition (except with regards to the size and selection of raw materials), corresponds to the draft of the cost estimate dated November 18, 1942 so that the actual structure, as built, was modified later. This is shown by the fact that, inside the room, the... 

Facility sampling should be carried out under both as-built and at-rest conditions during initial installation qualification (IQ) and operational qualification (OQ) of the facility, in order to baseline and bracket performance of the engineering controls, and to identify the normal background flora present in the... 

Data on the total electricity load were collected and compiled using the as-built drawings for lighting loads and the nameplate capacity of the motors for the major equipment and the air-conditioning loads. A spreadsheet was developed using the data mentioned earlier to conduct analysis of peak loads and energy loads under various scenarios. 

In classifying the environment, the manufacturer should state whether this is achieved under as-built (Fig. 2), at-resf (Fig. 3) or operational (Fig. 4) conditions. 

The information on material and material properties that should be obtained includes but is not limited to parts and materials susceptible to aging, the manufacturing process, as-built and afterservice condition, and heat treatment [13]. 

Review your existing equipment lists and mechanical plans. Compare the as-built drawings to the equipment installed. This helps to ensure that components are receiving regular attention. Also, equipment that has been installed in inaccessible locations is often overlooked during routine maintenance. By verifying the status of all equipment noted on the mechanical drawings, you are forced to confirm its presence and condition. 

All accident analyses are based on a valid data base such as geometrical data, material properties, physical and thermohydraulic data including boundary conditions of plant operational status. Every accident analysis needs a plant model which must be constructed on the basis of valid data. This data base is subject to quality assurance programme. It is essential that plant owners obtain reliable and verifiable data on the plant as-built and modified over the plant lifetime and validate them appropriately. 

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