Storage pools

Natural gas production and transmission systems are complemented by underground storage systems. These systems provide the capabdity to respond to short-term gas demands which exceed the immediate production levels or transmission capabdities. They also provide an opportunity to sustain some production by refilling the storage areas when seasonal temperature variations lead to periods of reduced gas demand. In the United States in 1990, there were 397 storage pools having a combined capacity of 2.2 x 10 (1). 

Answer Review the plant s design to determine how radioactive water could get from the plant to the river. Some ways are i) through the heat exchanger and through the condenser, ii) from the closed circuit water into the service water, iii) from the spent fuel storage pool, and iv) from the sump. Prepare fault trees or adapt existing fault trees to determine the probability of each of these release paths. Obtain reliability data for the components that are involved and evaluate the fault trees to determine the probability of each type of failure. For those pathways with a probabilit >7/y,... 

There is evidence for immunosuppressive effects of PAHs in rodents (Davila et al. 1997). For example, strong immunosuppressive effects were reported in mice that had been dosed with benzo[fl]pyrene and 3-methyl cholanthrene, effects that persisted for up to 18 months (Environmental Health Criteria 202). Multiple immu-notoxic effects have been reported in rodents, and there is evidence that these result from disturbance of calcium homeostasis (Davila et al. 1997). PAHs can activate protein tyrosine kinases in T cells that initiate the activation of a form of phospholipase C. Consequently, release of inositol triphosphate—a molecule that immobilizes Ca + from storage pools in the endoplasmic reticulum—is enhanced. 

When animals are fed experimental diets lacking copper or zinc, their copper or zinc status rapidly declines, suggesting that there is not a storage pool of these metals. Thus, while the small, cysteine-rich protein metallothionein (see below) can avidly bind zinc and copper, this may reflect its role in detoxification rather than as a specific storage form. This is reflected by the fact that metallothionein genes are typically expressed at a basal level, but their transcription is strongly induced by heavy metal load. 

Additional folate may be stored as the highly reduced JV -methyl-THF. This form is referred to as the storage pool as there is only one known enzyme that uses it, and in turn moves it back into the active pool. This enzyme is N-methyl THF-homocysteine methyltransferase, discussed above, which also requires vitamin and is involved in regenerating SAM as a methyl donor for reactions. 

Cobalamin deficiency can create a secondary deficiency of active THF by preventing its release from the storage pool through the AT-methyl THF-homocysteine methyltransferase reaction, and thus also result in megaloblastic anemia. Progressive peripheral neuropathy also results from cobalamin deficiency. TTeating a cobalamin deficiency with folate corrects the megaloblastic anemia but does not halt the neuropathy. 

Dense granule storage pool deficiency Deficiency of dense granules in megakaryocytes and platelets... 

Lages, B., Sussman, I. I., Levine, P. S., et al., Platelet alpha granule deficiency associated with decreased P-Selectin and selective impairment of thrombin-induced activation in a new patient with gray platelet syndrome (alpha-storage pool deficiency). J. Lab. Clin. Med. 129, 364-375 (1997). 

I When Insulin levels decreese, glucose transporters move from cell membrane to intracellular storage pool, where they can be recycled. 

The largest additional supply of natural gas for peak demands comes from underground storage reservoirs located, for example, close to the northern cities, as compared with the producing wells which may be located in the southwestern area of the country. Some of the storage pools are operated by pipeline companies, but most of the gas in underground storage is owned hy the local gas companies that serve metropolitan areas. 

Four states—Michigan, Pennsylvania, Illinois, and Ohio—have half of the total underground gas storage pools in the United States, with a total... 

The cobalt source is raised into the irradiation cell from the bottom of its storage pool for irradiation by the source elevator. The drive for the elevator is located in the modulator room. The motor for lifting the source is mounted on the main drive shaft by a torque-sensitive drive mechanism. This mechanism provides a safety feature by which, if the source jams, the elevator motor will hit limit switches and stop. 

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