Oak Ridge Today

Council to consider chlorine purchase Monday evening

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The Oak Ridge Outdoor Pool on Providence Road is pictured above. (Photo by City of Oak Ridge)

The Oak Ridge City Council will consider the purchase of up to about $60,000 worth of chlorine briquettes for the city’s outdoor pool on Providence Road this evening (Monday, July 12). Approval of the purchase would ensure that the large, unique pool can continue operating past mid-July, according to the city.

The purchase of the chlorine became controversial after Council member Rick Chinn, who is mayor pro tem (like a vice mayor), voted against the purchase of the briquettes last month. Chinn said he did not want to spend any more money on the pool. Residents and pool users responded with outrage, with hundreds of comments posted to social media. Some pledged to oppose Chinn’s re-election to Council next year.

Last month’s vote was for a sole-source purchase that hadn’t been released for a bid, possibly because the city’s supplier, Duffield Aquatics, had been identified as the sole provider in the region. The city uses Pulsar chlorinating briquettes supplied by Duffield Aquatics.

The sole-source purchase meant that last month’s vote required a unanimous vote. So, Chinn’s vote against the purchase meant it wasn’t approved.

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City has chlorine to continue operating pool, receives bid to buy more

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The Oak Ridge Outdoor Pool on Providence Road is pictured above. (Photo by City of Oak Ridge)

The City of Oak Ridge has enough chlorine to continue operating the outdoor pool until a new shipment arrives in mid-July, and the Oak Ridge City Council is expected to approve a single bid for chlorine briquettes during its July 12 meeting.

In June, City Council did not approve a sole-source contract to buy more chlorine briquettes after Oak Ridge City Council member Rick Chinn, who is mayor pro tem, objected to spending money on the pool. The sole-source contract required unanimous approval, so the one “no” vote meant the purchase was not approved.

Before the vote, Oak Ridge Recreation and Parks Director Jon Hetrick had told the seven-member Council that the city might have enough chlorine to last through the end of June and possibly into July. Running out of chemicals to treat the pool would result in having to shut it down, Hetrick said. However, in response to questions about a potential “break in service,” Hetrick said at that meeting that he didn’t have an accurate count of the amount of chlorine in stock at the pool.

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For members: Chinn opposes pool spending, affecting chlorine purchase

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The Oak Ridge Outdoor Pool on Providence Road is pictured above. (Photo by City of Oak Ridge)

Note: This story was updated at 8 p.m.

Oak Ridge Mayor Pro Tem Rick Chinn, who proposed closing the city’s outdoor pool two years ago, objected to spending any money on the pool on Monday. That meant the city could not, at least for now, buy more chlorine for the large, unique pool on Providence Road, near Oak Ridge High School.

‘Atomic switcheroo’ explains origins of thin-film solar cell mystery

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Current Maps

Cross-sectional electron beam-induced current maps show the difference in cadmium telluride solar cells before (pictured above) and after (below) cadmium chloride treatment. The increased brightness after treatment indicates higher current collection at the grain boundaries. (Submitted photo)

Treating cadmium-telluride (CdTe) solar cell materials with cadmium-chloride improves their efficiency, but researchers have not fully understood why. Now, an atomic-scale examination of the thin-film solar cells led by Oak Ridge National Laboratory has answered this decades-long debate about the materials’ photovoltaic efficiency increase after treatment.

A research team from ORNL, the University of Toledo, and the U.S. Department of Energy’s National Renewable Energy Laboratory used electron microscopy and computational simulations to explore the physical origins of the unexplained treatment process. The results are published in Physical Review Letters, or PRL.

Thin-film CdTe solar cells are considered a potential rival to silicon-based photovoltaic systems because of their theoretically low cost per power output and ease of fabrication. Their comparatively low historical efficiency in converting sunlight into energy, however, has limited the technology’s widespread use, especially for home systems. [Read more…]