Fluence surveillance by scraping samples from the inner surface of the thermal shield in the nuclear power plant Obrigheim in Germany (KWO)

Book · Sat Dec 31 00:00:00 EST 1994

OSTI ID:55583

Polke, E ^[1]

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1. Siemens AG Power Generation Group, Erlangen (Germany)

To reduce the end of life fluence of the KWO rpv, the core loading was modified in different steps. The influence of different core loading strategies on the neutron flux distribution at the inner rpv surface was determined by neutron transport calculations with the code DOT in (R-{Theta})-geometry and by analysis of samples scraped from the inner surface of the thermal shield. Samples were taken during the 7th, 9th, 11th, 18th, and 22nd refueling outages. Up to 38 samples from different azimuthal and axial positions were collected during each sampling campaign. The fluences determined by the Mn54 and Nb93m activities were in good agreement with the corresponding theoretically calculated fluences.

• OSTI ID: 55583
• Report Number(s): CONF-930809-; ISBN 0-8031-1899-6; TRN: 95:012828
• Resource Relation: Conference: 8. ASTM-EURATOM symposium on reactor dosimetry, Vail, CO (United States), 29 Aug - 3 Sep 1993; Other Information: PBD: 1994; Related Information: Is Part Of Reactor dosimetry. ASTM STP 1228; Farrar, H. IV; Lippincott, E.P.; Williams, J.G.; Vehar, D.W. [eds.]; PB: 871 p.
• Country of Publication: United States
• Language: English

Related Subjects

21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS
OBRIGHEIM REACTOR
PRESSURE VESSELS
REACTOR FUELING
NEUTRON FLUENCE
SERVICE LIFE
D CODES
MANGANESE 54
NIOBIUM 93
NUCLEAR POWER PLANTS
EXPERIMENTAL DATA
THEORETICAL DATA
PHYSICAL RADIATION EFFECTS