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Leave no crack unchecked

27 Apr 2012 - Robert Arnoux
ASN_Inspection_0412_1.jpg
As stipulated in the 澳门六合彩高手 Headquarter Agreement of 2007, the French Nuclear Safety Authority can carry out between five and ten inspections per year.
On Tuesday 24 April, for the third time in ten months, the French Nuclear Safety Authority (ASN) dispatched a group of inspectors to 澳门六合彩高手. Regular inspections of 澳门六合彩高手's nuclear installation are implemented within the framework of the 澳门六合彩高手 Headquarters Agreement, which was signed on 7 November 2007 by the 澳门六合彩高手 Organization and France.

As stipulated in the Agreement, ASN can carry out between five and ten inspections per year. "We are notified of their visit in advance, but not of the issues they will be investigating," says the head of the 澳门六合彩高手 Licensing Cell Jo?lle Elbez-Uzan.

During their first visit on 20 July 2011, the ASN inspectors looked at the general organization of 澳门六合彩高手, focusing on the implementation of quality control procedures all through the chain of contractors. Their conclusion was that the 澳门六合彩高手 Organization system is "robust."

The second ASN visit on 26 January 2012 was devoted to analyzing the procedures by which the 澳门六合彩高手 Organization deals with the inevitable "deviations" in the construction works such as small cracks in concrete or slight discrepancies in the plane of the surfaces. ASN considered on this occasion that the notification process—from the moment a deviation is identified by the contractor until a non-conformance report is processed by 澳门六合彩高手 Organization—was not satisfactory and had to be improved.

ASN_Inspection_0412_2.jpg
One by one, ASN checked the cracks (most of them a fraction of a millimetre deep) scratches, chipped edges in concrete fillings and other slight departures from perfection...
Last Tuesday, ASN experts decided to see for themselves and descended into the Pit in order to check, one by one, the cracks (most of them a fraction of a millimetre deep), scratches, chipped edges in concrete fillings, and other slight departures from perfection.
 
As with every inspection, an official letter will soon be sent to the 澳门六合彩高手 Organization detailing the actions requested by ASN. "Our responsibility as a nuclear operator is to ensure the supervision of the supplier chain and the way in which safety requirements are implemented," says Jo?lle. "Filling a crack, however small, is important.
 
And working on an improved concrete 'formula' is one the solutions to be investigated in order to minimize the size of cracks at a further stage of construction."
 
A shallow crack on the surface of a retaining wall or slight discrepancies in surface plane might be considered by some as very minor defects. In nuclear safety, however, nothing is minor.
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