Radiation and Radon in Natural Stone – Setting the Record Straight


Hans-Dieter Hensel

讲稿摘要/Abstract of Speech:

      过去15年来,人们多次提起花岗岩的辐射和花岗岩厨房操作台的氡的排放问题--通常由通过信息误导来不断尝试诋毁天然石材的品质/优点的石英石台面和塑料生产企业提出。比如,2008年5月8日,德克萨斯州休斯顿的KHOU广播电台的11号频道发布了一段视频,其中对花岗岩中的辐射水平和含有天然花岗岩厨房操作台的房屋中的相关氡水平进行了单方面的说明。为了支持他们的叙述,他们聘请了一名来自赖斯大学(Rice University)的粒子物理学家,使用便携式Na(I)伽马射线光谱仪对一些厨房操作台进行了辐射分析。



The issue of radiation in granite and the emission of radon from the granite kitchen countertops has been raised a number of times over the last 15 years - usually prompted by the quartz surfaces and plastic industry who are continually attempting to undermine the qualities/virtues of natural stone by misinformation crusades.   For example, on May 8, 2008 radio station KHOU Channel 11 in Houston, Texas released a video that presented a one-sided account of radiation levels in granite and associated radon levels in homes that contain natural granite kitchentops.  To support their account they engaged a particle physicist from Rice University to undertake radiation analyses of a number of kitchentops using a portable Na(I) gamma-ray spectrometer.  

By publicly suggesting that kitchen countertops might be radioactive invariably elicits a degree of concern and panic among uninformed consumers.  Consumers have neither the means to determine the radiation levels in their homes nor any avenue by which they can extract such information from the fabricators or wholesalers of stone.

A significant amount of testing since then has demonstrated that the potential hazard of radiation and radon emitted from natural stone is negligible. In context, more radiation is emitted from other building products and much more radon is produced in the natural environment from surrounding rock, soil and groundwater than is generated by stone countertops.  We receive much more radiation during every flight or from a medical X-ray.