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Abstract

The expected lifetime damage in the first wall of NET is about 30 dpa, in the case of AISI 316 L, one of the two candidate stainless steels. The corresponding helium formation has been calculated to be 360 to 390 ppm, i.e. the He/dpa ratio is about 13. In a MTR such as the HFR Petten this ratio, together with the right number of dpa, cannot be obtained without major drawbacks: - In the central position, where 30 dpa can be reached within four years, the accumulated helium amount is too small, and the ratio He/dpa is about 6 to 8 only. - In the peripheral positions with a He/dpa ratio of 15 to 20, the low dpa rate leads to an unacceptably long irradiation time of about 15 years for 30 dpa. - Neutron fluence tailoring, i.e. an initial irradiation in an outer position, followed by an irradiation in a central position, takes about 10 years to achieve 30 dpa with a ratio of 13 and is correspondingly expensive. SIENA is a newly developed irradiation device that combines the high dpa rate of a central position (6 to 7 dpa/yr) with the "right" He/dpa ratio of 13.

Additional information

Authors: RUSSO L, JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);SCHEURER H, JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);TSOTRIDIS G, JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);ZEISSER P, JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);MERELLE A, JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);TAS A JRC PETTEN ESTAB. (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS);NETHERLANDS ENERGY RESEARCH FOUNDATION, PETTEN (THE NETHERLANDS)
Bibliographic Reference: PLENARY MEETING OF THE EUROPEAN WORKING GROUP ON IRRADIATION TECHNOLOGY, KARLSRUHE (GERMANY), SEPT. 24-26, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32670 ORA
Availability: Can be ordered online
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