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IRIS: Proceeding Towards the Preliminary Design

[+] Author Affiliations
Mario D. Carelli

Westinghouse Electric Company, Pittsburgh, PA

K. Miller


C. Lombardi

Polytechnic of Milan, Milano, Italy

N. Todreas

Massachusetts Institute of Technology, Cambridge, MA

E. Greenspan

University of California at Berkeley, Berkeley, CA

H. Ninokata

TIT, Japan

F. Lopez

Bechtel, Ellicott City, MD

L. Cinotti

Ansaldo Nucleare, Italy

J. Collado

ENSA, Spain

F. Oriolo

Università di Pisa, Pisa, Italy

G. Alonso

ININ, Mexico

M. Moraes

NUCLEP, Brazil

R. Boroughs


A. Barroso

CNEN, Brazil

D. Ingersoll


N. Cavlina

FER, Croatia

Paper No. ICONE10-22497, pp. 883-888; 6 pages
  • 10th International Conference on Nuclear Engineering
  • 10th International Conference on Nuclear Engineering, Volume 2
  • Arlington, Virginia, USA, April 14–18, 2002
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-3596-0 | eISBN: 0-7918-3589-8
  • Copyright © 2002 by ASME


The IRIS (International Reactor Innovative and Secure) project has completed the conceptual design phase and is moving towards completion of the preliminary design, scheduled for the end of 2002. Several other papers presented in this conference provide details on major aspects of the IRIS design. The three most innovative features which uniquely characterize IRIS are, in descending order of impact: 1. Safety-by-design, which takes maximum advantage of the integral configuration to eliminate from consideration some accidents, greatly lessen the consequence of other accident scenarios and decrease their probability of occurring; 2. Optimized maintenance, where the interval between maintenance shutdowns is extended to 48 months; and 3. Long core life, of at least four years without shuffling or partial refueling. Regarding feature 1, design and analyses will be supplemented by an extensive testing campaign to verify and demonstrate the performance of the integral components, individually as well as interactive systems. Test planning is being initiated. Test results will be factored into PRA analyses under an overall risk informed regulation approach, which is planned to be used in the IRIS licensing. Pre-application activities with NRC are also scheduled to start in mid 2002. Regarding feature 2, effort is being focused on advanced online diagnostics for the integral components, first of all the steam generators, which are the most critical component; several techniques are being investigated. Finally, a four year long life core design is well underway and some of the IRIS team members are examining higher enrichment, eight to ten year life cores which could be considered for reloads.

Copyright © 2002 by ASME
Topics: Design



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