Additional oversight by the Nuclear Regulatory Commission is expected now that Entergy, the owner of the Pilgrim Nuclear Power Plant, has submitted a Licensee Event Report – or L-E-R – for the unplanned shutdown of the plant that occurred on October 14, 2013. The forced outage was caused by the loss of off-site power to the plant.
The L-E-R describes what the company’s evaluation found, as well as corrective actions it has implemented to prevent a recurrence of the shutdown. These actions include revisions to procedures and controls to prevent the simultaneous loss of both major off-site power lines to the plant.
A spokesman for the NRC says Pilgrim’s Performance Indicator for Unplanned Shutdowns per 7,000 Hours is expected to change from “Green” to “White”.
According to the NRC, a “green” coding indicates performance within an expected performance level in which related objectives are met; “white” indicates that related objectives are still being met, with a minimal reduction in safety margin.
More serious color codes include “yellow” indicating that related objectives are being met but with a moderate reduction in safety margin; and “red” indicates a significant reduction in safety margin in the area measured by that performance indicator.