- Author
-
Murphy, G. A.
|
Casada, M. L.
|
Johnson, M. P.
|
Muhleim, M. D.
|
Rooney, J. J.
- Title
- Survey and Evaluation of System Interaction Events and Sources. Appendices A and B. Volume 1. Technical Report.
- Coporate
- Nuclear Operation Analysis Center, Oak Ridge, TN
JBF Associates, Inc., Knoxville, TN
- Sponsor
- Nuclear Regulatory Commission, Washington, DC
- Report
-
NUREG/CR-3922; ORNL/NOAC-224 Vol.1.,
January 1985,
114 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
systems analysis
|
nuclear power plants
- Abstract
- This report describes the first phase of an NRC-sponsored project that identified and evaluated system interaction (SI) events that have occurred at commercial nuclear power plants in the United States. The project included: an assessment of nuclear power plant operating experience data sources; the development of search methods and event selection criteria for identifying SI events; review of possible SI events; and final evaluation and categorization of events. The report outlines each of these steps and presents the results of the project. The results include 235 events identified as adverse system interactions and 23 categories into which those vents were assigned. The categories represent groups of similar events and include areas such as: adverse interactions between normal or offsite power and emergency power systems; degradation of safety systems by vapor or gas intrusion; degradation of safety--related equipment by fire protection systems; and flooding of safety--relative equipment through plant drain systems. After evaluating each category (and the events contaired in them), the project made two major recommendations; the safety significance of each category with emphasis on the potential for continued problems in these areas should be examined; and current system interaction analyses methods should be studied to determine their effectiveness for identifying system interaction events. (Phase II of this project, "Evaluation of System Interaction Methods," will assess the effectiveness of current methods using the events identified in this report).