EMERGENCY 4 LA MOD ACCIDENT FULL

The utilities conduct pre outage risk assessments, based on a very detailed review of the outage schedule, to identify where combinations of outage work and out of service equipment would result in degraded conditions with respect to nuclear safety or regulatory compliance. Significant efforts are expended to manage the nuclear risk of an outage. This is done through the development of tools to assist in evaluating pending activities against requirements to detect undesired interactions. The Outage Risk moreВ В» Management Improvement Pilot Project seeks to improve the management of nuclear power plant outages. The LWRS Program serves to help the United States (U.S.) nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of these NPPs and the extension of their current operating licenses. The LWRS Program is performed in close collaboration with industry R&D programs that provide the technical foundations for licensing and managing the long term, safe, and economical operation of current nuclear power plants (NPPs). This research effort is a part of the Light Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by the Department of Energy.

EMERGENCY 4 LA MOD ACCIDENT FULL

However, the staff also recognized that for some issues it may not be practical to attempt to further reduce uncertainties, and some regulatory decisions or conclusions will have to be made with full awareness of existing uncertainties. In developing this plan, the staff recognized that the overall goal is to reduce the uncertainties in the source term sufficiently to enable the staff to make regulatory decisions on severe accident issues. The revised SARP addresses both the near-term research directed at providing a technical basis upon which decisions on important containment performance issues can be made moreВ В» and the long-term research needed to confirm and refine our understanding of severe accidents. This report describes the revised Severe Accident Research Program (SARP) and how the revisions are designed to provide confirmatory information and technical support to the NRC staff in implementing the staff's Integration Plan for Closure of Severe Accident Issues as described in SECY-88-147. Office of Nuclear Regulatory Research OSTI Identifier: 6807174 Report Number(s): NUREG-0900 ON: DE83901145 Resource Type: Technical Report Resource Relation: Other Information: Portions are illegible in microfiche products Country of Publication: United States Language: English Subject: 22 GENERAL STUDIES OF NUCLEAR REACTORS 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS 29 ENERGY PLANNING, POLICY AND ECONOMY BWR TYPE REACTORS REACTOR ACCIDENTS NUCLEAR POWER PLANTS PWR TYPE REACTORS RISK ASSESSMENT REACTOR SAFETY ACCIDENTS NUCLEAR FACILITIES POWER PLANTS REACTORS SAFETY THERMAL POWER PLANTS WATER COOLED REACTORS WATER MODERATED REACTORS 220900* - Nuclear Reactor Technology- Reactor Safety 210100 - Power Reactors, Nonbreeding, Light-Water Moderated, Boiling Water Cooled 210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled 290600 - Energy Planning & Policy- Nuclear = ,ДЇor the past 10 years, since the Three Mile Island accident, the NRC has sponsored an active research program on light-water-reactor severe accidents as part of a multi-faceted approach to reactor safety. В«В lessДЄuthors: Larkins, J T Cunningham, M A Publication Date: Research Org.: Nuclear Regulatory Commission, Washington, DC (USA). Most of this moreВ В» work will be concluded by early 1986. Confirmatory research will be carried out in phase II to provide additional assurance on the appropriateness of phase I decisions. Additionally at this time, all of the thirteen program elements in Chapter 5 will be reviewed and assessed in terms of how much additional work is necessary and where major impacts in probabilistic risk assessment might be achieved. There are thirteen program elements in the plan and the work is phased in two parts, with the first phase being completed in early 1984, at which time an assessment will be made whether or not any major changes will be recommended to the Commission for operating plants to handle severe accidents. The analysis to address these issues will be performed using improved probabilistic risk assessment methodology, as benchmarked to more exact data and analysis. SARP will develop generic bases to determine how safe the plants are and where and how their level of safety ought to be improved. The Severe Accident Research Plan (SARP) will provide technical information necessary to support regulatory decisions in the severe accident area for existing or planned nuclear power plants, and covers research for the time period of January 1982 through January 1986.

Emergency 4 la mod accident