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Four criteria are proposed for defining low activation materials (LAMs), based on limits for the short and long term radioactivity. The first criterion proposes a 50 mSu limit for the early dose at 1000 m produced by the accidental release of a LAM. The second is that in order to perform prolonged maintenance operations within the plasma chamber, the dose rating inside the chamber should be limited to 10,000 Gy/h. The third and fourth criteria suggest limits for the contact dose rating and the decay heat of a LAM after disposal into a deep geological repository or alternatively after hands-on recycling. The materials investigated were reference steels, reduced activation steels and low activation alloys.

Additional information

Authors: ROCCO P, JRC Ispra (IT);ZUCCHETTI M, Politecnico di Torino, Torino (IT)
Bibliographic Reference: Paper presented: IEA Workshop on Low Activation Materials, Culham (GB), April 8-12, 1991
Availability: Available from (1) as Paper EN 36062 ORA
Record Number: 199110857 / Last updated on: 1994-12-02
Original language: en
Available languages: en