Investigations are performed, how much primary coolant gas is released when liner leaks occur. In simplified models for calculations a cleft between liner and concretewith an uniform width h in the (im-range is assumed. Leaking gas flows along the cleft and percolates into the concrete. The flow rates depend very strongly on h. In connection with a venting channel system lying nearby the liner it is demonstrated, that for clefts in the range 5 $mu$m gas percolates quickly into the concrete. For separations of 50 $mu$m a large expansion in the concrete-liner interface is to expect, supposed the concrete is not cracked. Experimental results are discussed. Simple estimations show that the gas flow rates of liner leaks suggest clefts between liner and concrete in the range 5 - 5 0 $mu$m.
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机译：进行调查，了解是否发生衬管泄漏时释放出多少主要冷却剂气体。在简化的计算模型中，衬砌和混凝土之间的裂缝具有均匀的h宽度（假定在im范围内。泄漏的气体沿着裂缝流动并渗入混凝土中。流速非常依赖于h。通道系统位于衬板附近，结果表明，对于裂缝范围为5美元/μm的气体，气体会迅速渗入混凝土中；对于50美元/μm的分离，可望在混凝土-衬砌界面处产生较大的膨胀，假设混凝土没有开裂，讨论了实验结果，简单估算表明衬砌泄漏的气体流速表明衬砌和混凝土之间的裂缝范围为5-5 0 $ mu $ m。
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