Practical examples of SAMG
A number of plants have developed their own SAMG, but many have used a generic product and adapted it to their specific plant.
Major generic SAMG are:
1. Pressurised Water Reactors Owners Group
(PWROG) SAMG. This is a merger of the WOG and CEOG SAMG. New consolidated PWROG SAMG have been developed for use by all US Westinghouse, CE and B&W plants. More information is provided in
  • Insights from Development of the Combined PWR SAMG, N. Reed LaBarge, Robert J. Lutz and Kevin M. Honath, Westinghouse Electric Company; J. Brad Chamberlain, Ted Book, Areva; Steven Pierson, Exelon Nuclear;
ANS PSA 2013 - International Topical Meeting on Probabilistic Safety Assessment and Analysis Columbia, SC, USA, September 22 - 26, 2013.
  • Enhancements to PWR SAMG since Fukushima, R. Prior, Journal of Energy. VOL 65-2, 2016, pp. 3-11.
  • Informing Severe Accident Management Guidance and Actions for Nuclear Power Plants through Analytical Simulation, July 2018, Section 4.3.
NEA/CSNI/R(2017)16.
Some plants are using previously developed generic SAMG packages under the individual owners groups before the merger:
2. Westinghouse Owners Group (WOG) SAMG, applied at many NPPs throughout the world, both Westinghouse and other (e.g. VVER, CANDU)
designs. More information is provided in DESSARS, N., The WOG SAMG approach and its plant-specific adaptation”, Westinghouse Electric Europe, Workshop on Severe Accidents Related Issues, Prague, Czech Republic, June 17-18, 2003.
3. Combustion Engineering Owners Group (CEOG) SAMG, further developed by Areva Germany for Areva NPPs in Germany and Switzerland. See SRS 32, Appendix VII Read more → and document: 'Severe accident management concept for LWRS', Plank, H.; Mandl, R.; Harald, R.-S.; Weber, K. (Framatome ANP GmbH (Germany)); Kluegel, J.-U. (NPP Goesgen (Switzerland)) 13. International Conference on Nuclear Engineering; Beijing (China); 16-20 May 2005.
4. Electricite de France (EdF)
SAMG, mostly called by their French acronym: GIAG (focuses on containment leak tightness and protection against overpressure). See Progress in the implementation of Severe Accident Measures on the Operated French PWR, Some IRSN Views and Activities, E. Raimond, G. Cenerino, N. Rahni, M. Dubreuil, F. Pichereau, Reactor Safety Division . See also: IRSN website
5. Boiling Water Reactor Owners Group.
BWROG SAMG
is used worldwide on General Electric Hitachi BWRs and is an integrated set of EOPs and SAMG. It has gone through various stages and now is in its Revision 4, which contains a number of experiences from the Fukushima-Daiichi accident. More information can be found in BWROG – Emergency Procedures and Severe Accident Guidelines (EPG/SAG) Revision 4 Highlights, B. Williamson et al. (USA), Topical Issues in Nuclear Installation Safety. Proceedings of an International Conference, 6–9 June 2017, Vienna, Austria, Vol. 2, pp. 229-235.
6. Areva SAMG, designed for the EPR but also applicable for PWR: OSSA (Operational Support for Severe Accidents).
More information provided in: OSSA - An Optimized Approach to Severe Accident Management, E.C. Sauvage, R. Prior, Areva, Paris, France, Proceedings of ICAPP 2006, presented by Sandra Sloan, Reno, NV, USA, June 2006.
7. Accident Management Manuals, developed for Swedish reactors, including Finnish BWRs. See
document: A Survey on Implementation of Severe Accident Management in Sweden, Veine Gustavsson, SwedPower, Sweden, OECD Workshop on the Implementation of Severe Accident Management Measures PSI, Villigen PSI, Switzerland, 10 -13.9.2001. See also document: Implementation of Severe Accident Management Strategy at the Loviisa NPP, Petra Lundstrom, lli Kymalainen and Harri Tuomisto, Fortum Nuclear Services Ltd, Finland, OECD Workshop on the Implementation of Severe Accident Management Measures PSI, Villigen-PSI, Switzerland,
10-13.9.2001.
8. CANDU SAMG. Canadian CANDU plants‘ operators have implemented adequate procedures, i.e. emergency operating procedures (EOPs), emergency mitigating equipment guidelines (EMEGs) and severe accident management guidelines (SAMGs) to cope with accidents including the design extension conditions Ref .: N. Mesmous, “Addressing Severe Accidents Through Design Extension Conditions and Severe Accident Management“; ISAMC-2018; Ottawa, October 15-18, 2018. The scope of SAMG was expanded to include accidents triggered by multi-unit events (for the multi-units stations) and irradiated fuel bay events, and to integrate emergency mitigating equipment (EME) into overall SAM (e.g. EMEG/SAMG), and also to establish the link between the accident management and the emergency response.
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