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The Gamma Radiation Emitted by a PWR Core Under Severe Accident Conditions

[+] Author Affiliations
Carsten Brachem, Uwe Hampel

Technische Universität Dresden, Dresden, Germany

Jörg Konheiser

Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

Paper No. ICONE22-30843, pp. V003T06A036; 8 pages
doi:10.1115/ICONE22-30843
From:
  • 2014 22nd International Conference on Nuclear Engineering
  • Volume 3: Next Generation Reactors and Advanced Reactors; Nuclear Safety and Security
  • Prague, Czech Republic, July 7–11, 2014
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-4593-6
  • Copyright © 2014 by ASME

abstract

The gamma radiation emitted by a nuclear reactor core might contain information about the reactor state. This information may be used in a monitoring system for severe accidents. The Technische Universität Dresden and the Zittau/Görlitz University of Applied Sciences are currently carrying out feasibility studies for the development of such a system in a collaborative effort. As one part of such feasibility studies we performed Monte Carlo simulations on a simplified model of a generic pressurized water reactor. For a set of states which represent scenarios of a coolant level decrease and core melt, the gamma radiation distribution outside the reactor pressure vessel has been computed. The results are presented in this paper.

They indicate that different coolant levels yield different gamma radiation distributions, and that an accumulation of corium inside the lower head is detectable from the outside.

Copyright © 2014 by ASME

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