NRC Introduces USWC Performance Indicator as Part of Nuclear Reactor Oversight Process
July 16, 2007 // Published as a news service by IHS
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The Nuclear Regulatory Commission (NRC) updated its
reactor oversight process (ROP) by introducing the unplanned scrams with complications (USWC) performance indicator.
This indicator tracks events that can increase the risk associated with a reactor's unplanned manual or automatic shutdowns, which are called scrams.
It will monitor conditions that could complicate a plant's scram recovery, including:
- Maintaining control over conditions needed for a chain reaction.
- Providing electricity to emergency systems.
- Activating emergency sources of cooling water.
- Maintaining availability of normal cooling water sources.
- Using emergency operating procedures to address complicated scrams.
Triggering any one of the criteria during an unplanned scram counts as an event, and two or more events in a 12-month period will result in increased oversight, according to NRC.
For more information about the USWC indicator, go to http://www.nrc.gov/NRR/OVERSIGHT/ASSESS/unplanned-scrams-with-complications.html.
Source: Nuclear Regulatory Commission (NRC).
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