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Home My WebLink AboutThe Goderich Signal-Star, 1978-10-05, Page 36SAYE ON CORRUGATED FIBERGLASS PANEL 1 They're available in white, green and yellow. They're 26" wide and they come in 3 different lengths. They're perfect for shel- ter, shade and privacy. Not all colors are available at all branches. • 8 -ft Length NOW 10 -ft Length NOW 12 -ft Length NOW PAGE 14A—THE GODERICH SIGNAL -STAR. THURSDAY" OCTOBER5. 1978 BNPD unit near Enriching unit four at Bruce Heavy Water Plant B at the Bruce Nuclear P.ower Development (BNPD) is nearly completed and should begin to produce heavy water by mid-October according to BNPD spokesman Don White. Mr. White said a one and one half percent concentration of hydrogen sulphide has been introduced into the unit. Hydrogen sulphide is used in the heavy water production process. "Following this, a week long series of tests and checks will be made on the flanges, valves and seals of the unit, to ensure there are no leaks," Mr. White said. After the tests have been completed, Mr. White said the unit will be purged of all "that's in there" by venting the mixture up the fjare stack. "When this happens, there could be an odour that nearby residents will notice," Mr. White said. Hydrogen sulphide gas smells like rotten eggs. After the unit has been purged, Mr. White said its will be filled with 100 percent hydrogen. sulphide and the piping system will be put through a pre- conditioning process that, will last about three 'weeks. "So, by mid to late October, enriching unit four will be producing some heavy water," Mr. White said. KEY TO SYSTEM Heavy water is the key to Canada's nuclear power system. It is the medium. in which natural uranium atoms produce steam -raising heat to churn electric generators. This moderating fluid also 'serves as coolant, transferring heat from the nuclear reactor to the generator steam system. About 200 gallons is needed for every megawatt of generating capacity installed. You drink - the equivalent of a glass of heavy water in every 7,000 glassfuls of water you consume. What makes it different is that the hydrogen is heavier. Heavy Hydrogen (deuterium) makes heavy water, or deuterium oxide. This denser fluid slows down neutrons, those atomic core • fragments that trigger nuclear activity. Moderately slow moving neutrons split uranium atoms to ping off other neutrons. Heat is produced in the process. The heat makes steam to 'spin the turbine - generators •for elec- tricity. This Canadian nuclear power system,, using natural uranium (,yvithout enrichment), is one of two routes to electricity that were spun off from the wartime atomic bomb project. While Enrico Fermi at Chicago used graphite blocksto moderate neutrons in enriched nuclear fuel an, Anglo -French-Canadian team at Montreal' used heavy water with low grade uranium. The heavy water has proven about eight times more effective than graphite in moderating neutron activity. Canadians stayed with the natural uranium - deuterium oxide system. It. paid off when Candu reactors began producing power in the .,1970s at Ontario ' Hydro's Pickering station with 99 - percent reliability. The - heavy water is expensive to produce but there are commensurate fuel savings in not having to enrich the uranium. Heavy water is ex- pensive to - produce because the one in 7,000 molecules • do not part Turn to pr lge 15A • 11 *hint's are tough T a 1 1( We're vastly overstocked on a wide variety of items. They're TOP QUALITY pro- ducts - but we ordered too many of them, and they're jamming up our warehouses. So out they go. Right now you can pick up some wonderful bargains at Discount Dave's: doors and windows, and asphalt shingles; Acorn vanities and nylon flags. And much, much more! Not all the items on these two pages are necessarily available at all branches, but many of our branches have items on sale that aren't even advertised. So look for the UNADVERTISED ITEMS on sale. And hurry on over for the special bargains shown here. Prices are in effect while stocks last. Sale ends Saturday, October 14, 1978. While Stocks Last...SAVE 5300 A GALLON RAZ Redw Walnut or Cedar Stain Semi -transparent stain ideal for fences, outdoor furniture, patio decks and all in- terior wood finishing including fine fur- niture 95 Gallon OUR USUAL CASH & CARRY 9.95 • ZO% REDWOOD & CEAR- 125 Volt 1,000 Hour 'Alpha Brand by Philips 40 ... 60 AND 1.00 WATTS LIGHT BULBS LIMITED SUPPLY! . Some of our. Limited Su ,Branches have a Branches of Red/Black• and Grey/Black Shingles at While They Last SAVE NOW ON ACORN VANITIES AND MARBLE VANITY TOPS F'V A,.( v:9 5 Now's the time to buy! We're leaded with Redwood and Cedar, and we don't want them plugging up our yards during, the winter months a head, So buy now! Various Sizes and lengths are spread throughout our 16 branches. So hurry on,over while selections are at their peak. 41 We Are Clearing Oucidire t Ouo4 wiet tLe I0�is Stock" CA 4143 i4" !litS • Why Pay More Later in the Season? Special Savins Now on our Enitire Stock of Acorn Vanities The styling is "Madrid"; the colors are white and pecan - while stocks "' last. And remember: Acorn vanities are extremely well made. They're a handsome asset to any bathroom. FOR EXAMPLE: You can save 15.30 on our 24" Acorn vanity. Dur usual cash & carry price for this model is 76.49 but while stocks last, you pay only You save even more on the 30" model, a whop- ping 16.59! Our usual cash & carry price for this unit is 82.95 And Here's A. Wonderful Opportunity To Buy Quality For Less! Save 20% N 6I" 6636 TOPS & TAPS ARE EXTRA OFF OUR USUAL CASH & CARRY PRICES ON MARBLE TOPS These tops are made by Canadian Vanities. They're available in a wide variety of sizes, colors and patterns. So choose one this week at Discount Dave's; a distinctive design that will reflect your own per- sonal lifestyle. They're perfect for the Acorn vanities described above. •