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KAPPA ANALYSIS WORLD PULPPAPER74 During the trial the break events on the No.1 linerboard machine were tracked 41 breaks were saved what is wrong if the measurement is offline for half an hour for preventive maintenance. We call them in advance to get permission to take it offline. Thats how critical it is jokes Williamson. HIGHER YIELD FEWER WEB BREAKS During the trial period the average Kappa number was raised about three points now it is run consistently at a target of 98. In all fairness this increase is not entirely due to the SPK measurement. The mill also invested in wood chipping operations to get more even chip size and more uniform cooking. Williamson has no problem crediting the SPK with one point Kappa increase. In fact he says they could not have made the full three point shift without it. He estimates that a one point increase means 300000 savings in wood costs and energy savings in the recovery operation since there is less black liquor in the loop with a lower liquor-to-wood charge. During the trial the break events on the No.1 linerboard machine were tracked. Forty-one breaks were saved according to an internal report that resulted in a payback of 8 to 16 months depending on the operating period chosen. No.1 machine was rebuilt with a new press section in 2015 and that in itself would be expected to improve productivity. It is therefore difficult to isolate the effects of the Kappa measurement. However considering how the operators rely on the measurement to avoid breaks Williamson has no problem extrapolating the initial trial results to today. Lee adds his thoughts on the benefits Fewer breaks mean more uptime and more total production. Increased reliability is a major focus going forward and the SPK goes a long way to reducing those breaks from a fibre furnish standpoint. The whole mill is sitting on the BTG measurement Williamson concludes. Figure 4. Kappa number variations were reduced during the trial period. Over six months to January 2016 the sigma values averaged 2.63 - more than 50 reduction from the trial start.