Target levels

World reactor-related requirements are expected to increase from 57,182 t U in 1992 to about 75,673 t U by the year 2010. Some utiUties are expected to continue to meet their requirements by purchasing or drawing on excess inventory. Annual uranium production should remain below actual requirements until some target level of stocks is reached (27). 

An innovative companion technology to SVE is radio frequency heating of the soil (42,43). Heating the soil increases the volatilization of the containments which are removed by SVE. Antennae are installed near the center of the contaminated area the radio frequency energy appHed through the anteimae heat the soil to target levels of 100 to 150°C. 

In general, the following steps are used to ensure optimum regeneration and catalyst performance recovery alow temperature first pass to remove low boiling point hydrocarbons and other volatile matter, an initial combustion step to remove a portion of the sulfur and carbon, and a final combustion step to remove the remaining carbon to the target level. 

It is typical for industrial premises to have, in one space, zones with different target levels. The target levels may be determined for the whole area or locally. Often only a part of the space requires controlling of the indoor environment parameters. In addition to the main controlled zone, there may be one or more local controlled zones with target levels different from those in the main controlled zone. 

In general ventilation systems some indoor air parameters are controlled only partially. Target levels are usually lower than for air conditioning. 

In industrial premises the target levels of indoor air quality, as well as other targets (e.g. emissions), shall be specified zone by zone. 

Target Prediction of target levels for indoor and outdoor conditions Classifications... 

Define target levels for indoor (zones) and outdoor (exhaust) conditions. 

Specify design conditions in which the target levels are to be met. 

Define target levels for the ventilation system, such as reliability, energy consumption, investment, life cycle costs, etc. 

Select acceptable systems based on target levels. 

If some new agent is identified, the target level has to be defined for that agent too. 

If defined target levels cannot be reached, reconsider target levels. 

BC 5 Calculation of Total Building Loads — Target Level Assessment... 

If some source has governing role over total loads, reconsider the target level of that local zone in order to reduce loads. 

If target levels cannot be achieved with any system or it is not economically possible, check whether something can be done with loads. 

This task consists of defining target levels for indoor and outdoor conditions based on requirements for laws and regulations, human health, production processes and equipment, and type of premises and construction. Target levels should also be defined for the ventilation system. For the decision tree, see Fig. 3.6. 

Target levels are needed as a standard to which system solutions are compared. During comparison it may become evident that target levels cannot be achieved with any solution or that they lead to very expensive solutions. In such cases target levels have to be reconsidered (back coupling). 

Decide target levels based on musts and needs. 

Suggest and agree with customer on the outdoor conditions within which the target levels have to be met, e.g., absolute maximum temperature versus 95% temperature. 

Compare calculated conditions to the target levels of the zone. 

Reconsider the target levels of local zone to reduce emission of a single source. 

If the answer is no, reconsider the target levels of the main zone (general ventilation), if loads cannot be reduced. 

There are two different tasks in system selection acceptance of systems based on target levels, and comparison of acceptable systems in order to choose the most desirable one. 

Based on technical calculations the conditions achievable by different systems (ventilation, cleaning, etc.) are compared to target levels to identify acceptable systems. Dimensioning properties could be ... 

Compare conditions reached with different systems to target levels. 

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