The preliminary standard applies to the examination of meat and meat products. For sampling, reference is made to NVN 5641. The methods described are suitable for accident situations but can also be used for background monitoring. After the sample preparation described in this preliminary standard, the sample is suitable for various measurements, for example measurement of gamma radioactivity according to NVN 5623 or NVN 5629 or for measurement of specific radionuclides (for example according to NVN 5637). Note In the event of an accident, contamination of meat is mainly the result of food intake, but contaminated drinking water or inhalation can also be an important route. The main types of meat are beef, veal and pork. In meat, the levels of 134Cs and 137Cs are particularly important, while bone seekers such as 90Sr are only absorbed to a small extent in the meat. Furthermore, accumulation can occur in certain organs, for example 131l in the thyroid gland.
NVN 5642-1992 history
1992NVN 5642-1992 Radioactivity measurements. Sample preparation of meat and meat products