Two items from today’s Nuclear Regulatory Commission’s Event Notification Report page:
1. Friday evening, personnel at Louisiana’s River Bend nuclear power plant were conducting a test of the High Pressure Core Spray (HPCS) when a leak was discovered in a valve between the HPCS and the Condensate Storage Tank. In the Event of a Loss of Coolant Accident (LOCA,) the HPCS would be aligned to the suppression pool. According to the Event Reports:
…engineering personnel noted that the observed leakage past the two MOVs (motor operated valves) might be sufficient to deplete suppression pool inventory such that it would not be capable of performing its specified function for the duration of the 30 day mission time. The issue of concern is that once HPCS is aligned to the suppression pool post-LOCA, pool inventory would be lost to the CST through the leaking test return valves.
As a result, the HPCS was declared inoperable.
2. And the Cooper nuclear power plant in Nebraska posted this today:
At 1549 CDT, August 3, 2014, the National Weather Service inadvertently issued a Civil Emergency Message over their pager notification system during preparations for an upcoming [Cooper Nuclear Station] Emergency Drill. A follow up message was issued by the National Weather Service at 1601 CDT stating that the Civil Emergency Message was a test message and should be disregarded.
The Omaha World-Herald provided this additional detail this morning:
National Weather Service personnel Sunday were updating wording that is programmed into a computer system when the alert was mistakenly broadcast, NPPD said.