Sentences with phrase «leak rates»

Though focused on end uses of natural gas, the paper also shows how results are affected by highly uncertain leak rates from natural gas production and delivery.

I am surprised that a high leak rate such as this is not showing evidence on the ground.

With site - specific data, they found relatively low overall leak rates but were able to identify gas - operated valves as an important leakage point.

This all adds up to a high degree of variance in reported leak rates.

«You would not expect leak rates to be the same,» he said in an interview.

Don't just monitor the temperature gauge, check the coolant level when possible until you figure out the approximate leak rate.

Analysis of methane and ethane data from dozens of plume transects, collected during 13 research - aircraft flights between 7 November 2015 and 13 February 2016, shows atmospheric leak rates of up to 60 metric tons of methane and 4.5 metric tons of ethane per hour.

The methane leak rates found in Pennsylvania were similar to those found in the atmosphere near natural gas fields in Utah's Uintah Basin and Colorado's Denver - Julesberg Basin, showing that methane leaks are widespread in natural gas fields across the country, the study says.

The Nuclear Regulatory Commission granted Entergy, the owner / operator of the Indian Point nuclear power plant in Buchanan permission to extend the frequency of the containment integrated leak rate test from once every 10 years to once every 15 years on a permanent basis.

Let's assume a 3 percent leak rate during shale gas production.

From his ethane research and other international studies, he learned that there appears to be a much higher ethane source in the earth's Northern Hemisphere than in the Southern and a higher leak rate in the central United States than in more eastern oil and gas fields, and that some oil and gas fields in the central United States leak at much higher rates than others.

The state has lost another round in its legal fight against the Indian Point nuclear facility, with a federal regulator rejecting its effort to force the plant to undergo leak rate tests more often.

Using his measurements and those from land - based efforts, he and his coauthors suggest that atmospheric leak rates from the blowout were up to 66 tons of methane and 4.9 tons of ethane per hour at times.

Measuring leak rates, plume locations, and plume composition would also help officials assess public health risks, the effectiveness of leak control, and climate and air - quality impacts.

«There's quite a bit of uncertainty and disagreement about what the actual leak rate is,» said Tom Moore, Western Regional Air Partnership Air Quality Program Manager for the Western States Air Resources Council in Fort Collins, Colo. «That makes it difficult to understand how much any particular regulation would reduce methane leakage.»

To put that number in context, a recent peer - reviewed study found that methane leaks from Texas» Barnett Shale, a field that produces 7 percent of the nation's natural gas, had an average leak rate of 65 tons per hour.

For the pipeline distribution system, the agency calculates this loss based on leak rates calculated from a 1996 study, conducted in collaboration with the Gas Research Institute (now the Gas Technology Institute).

It is inherent that all cam phasers have a certain oil leak rate.

Between 2012 and 2013, ConocoPhillips» leak rate increased by 12 percent, according to ClimateWire's analysis.

Their report emphasizes the utility of rapid - response airborne chemical sampling in providing leak rate data, and it reveals how single vulnerabilities in the natural gas infrastructure can impact local and federal climate policies.

New research to re-examine distribution system leak rates has been funded by the Environmental Defense Fund as part of a larger project to quantify lost methane from the natural gas system.

Some scientists involved in this complex dispute still remain intrigued by the natural gas leak rates found in some U.S. oil and gas fields.

You lost the entire charge - probably 1500 to 3000 grams over the winter, so a mere 7g / year leak rate is two magnitudes more sensitive than you would need in theory.

But given a fine - ish - pitch sump bolt, and reasonable thread length, and nicely thick & sludgy oil so leak rate is low, you may well win.

The E.P.A. recently issued regulations limiting leak rates from such valves.

These high leak rates illustrate the urgent need to identify and mitigate these leaks as shale gas production continues to increase nationally (10).

[T] hese regional scale findings and a recent national study (23) indicate that overall sites leak rates can be higher than current inventory estimates.

As a result of their enhanced SF6 reduction strategic planning, ComEd has decreased its SF6 leak rate in each of the past ten years.

Not only does this system allow quick, easy and accurate data entry, it also enables the Environmental and Planning Departments to track leak rates, nameplate capacities, bottle inventories and usage, equipment trending, and any other variable it would need to make informed decisions.

A study this spring from the Department of Energy — even using leak rates we now know to be too conservative — found that shipping natural gas to China and burning it instead of coal would mean no improvement for the climate.

The drilling phase is transient, and even if there are high leak rates as the drill penetrates coal - bearing strata they are likely to persist for a matter of days, or at most until the well is cased, usually a couple of weeks.

These high - performance cam phasers have a much lower leak rate than stock, allowing better control of the phasers at higher engine speeds and loads.

A new study provides one of the first quantitative estimates of the methane leak rate from the blowout of a natural gas well in California in 2015, suggesting that emissions from this event temporarily doubled those from all other sources in the entire Los Angeles Basin, including landfills, dairies, and other leaks.

A 1 percent leak rate every 1,000 years would keep warming levels «manageable,» Shaffer said.

ALBANY — The state has lost another round in its legal fight against the Indian Point nuclear facility, with a federal regulator rejecting its effort to force the plant to undergo leak rate tests more often.

The agency estimates that methane emissions fell nearly 12.7 percent during the same time — an assessment based on expected leak rates, not actual measurements.

The actual leak rate is poorly known, but in any reasonable case U.S. shale gas production is a small, but not trivial, contributor to the global methane increase over the last several years.

The data presented by Miller et al. constrains the overall leak rate from the oil and gas supply chains — providing an independently derived aggregate estimate of fossil fuel sources of methane emissions.

Under the consent decree, Trader Joe's agreed over the next three years to reduce its leak rate to less than half the average in the grocery store sector, and to use non-ozone depleting refrigerants at all new and heavily remodeled stores.

The reported leak rate can be related to age, with the oldest pipelines having the higher leak rates.»

The State Department concludes: «a direct cause - and - effect relationship between operating temperature and leak rate is not conclusive.

The part is made from rigid plastic, it isn't too big, and the leak rate specification is comparable to other fuel system components.

Leakiness («leak rate») is defined as the amount of methane a company emits per unit of oil and gas it produces at all the oil and gas fields it operates in the United States.

However, the researcher was quick to caution that those concerned about leak rates from natural gas production should not try to use the numbers from the Uinta Basin, the Utah gas field where these measurements were taken, as representative of leak rates from all gas fields.

To determine total leaks, the agency multiplies the leak rate by the miles of pipe, subtracts any emissions reductions techniques reported by gas companies and comes up with a final emissions number.

«The whole objective of our work is to develop this database of direct emission and leak rates,» said Lamb.

«But our image analysis shows the leak rate must be greater, possibly by a factor of 10.»

«There's so much coalbed methane in the Four Corners area, it doesn't need to be that crazy of a leak rate to produce the emissions that we see.

A more recent study by NOAA in the Uinta Basin found a leak rate that varied between 8.4 and 15.9 percent.

NSAIDs were associated with a 24 percent increased risk for anastomotic leak after risk adjustment and this association was isolated to nonelective (urgent) colorectal surgery, where the leak rate was 12.3 percent in the NSAID group and 8.3 percent in the non-NSAID group.