I've noticed the NRC stopped up-dating their daily post. They actually had a post up showing the 01-01-2000 shutdowns on 01-02-2000 but removed them. What going on here.

http://www.nrc.gov/NRR/DAILY/der.htm

-- shockwave (vission441@aol.com), January 04, 2000

Answers

I picked this up off of todays STATUS report wich is current but the EVENT report has not been updated since yesterday so can't get the details.

---------------------------------------------------------------------- --------- 2 OCONEE 3 0 01/03/00 Hot Standby * 1 REACTOR TRIP ON 1/3/2000, SEE EVENT #36557 ---------------------------------------------------------------------- ----------

-- Charli (claypool@belatlantic.net), January 04, 2000.

I can help with this one. Go to the Index of Daily Reports and you'll get January's with last year's reports lower on the page.

http://www.nrc.gov/NRR/DAILY/drlist.htm

A quick summary of the Oconee report is that the plant was manually scrammed at 55% power. It's believed that the problem was a "Stator Water Cooling Temperature Control Valve (TCV) failed closed which caused the Stator water to bypass its coolers".

The January 3, 2000 Oconee report in full:

MANUAL TURBINE TRIP FROM 28% CAUSED AN AUTOMATIC REACTOR TRIP

Unit 3 was initially at 100% power level when a Stator Coolant Runback initiated due to High Stator Coolant Temperature. Turbine Runback to 0 MWe with Reactor power at approximately 28% power. The Turbine was manually tripped and the Reactor automatically tripped on Turbine to Reactor anticipatory Trip. All rods fully inserted into the core. A couple of Once Through Steam Generator Safety Relief Valves opened/closed. Main Feedwater Water remained inservice and steam is being dumped to the condenser to maintain a Tave no load condition. All Emergency Core Cooling systems, Diesel generator, and their Keowee system are fully operable if needed. | | | The licensee believes that the Stator Water Cooling Temperature Control Valve (TCV) failed closed which caused the Stator water to bypass its coolers. The licensee also stated that it took approximately 3 to 4 minutes to reduce reactor power from 100% to 28% at which point the Turbine was manually tripped. The operators believed they were below the Turbine trip/Reactor Trip setpoint when the Main Turbine was manually tripped. One of the three Turbine Trip/Reactor Trip setpoint bypasses was bypassed but the other two were right on their bypass setpoint when the Turbine was manually tripped. | | | | The NRC Resident Inspector was notified of this event by the licensee. | | *** UPDATE ON 01/03/00 AT 1640 HOURS FROM DUNTON TAKEN BY MACKINNON *** | | The licensee revised the above event report to state that the Turbine was manually tripped at 55% reactor power by orders of the SRO because of potential electrical damage to the generator. Therefore the licensee was expecting the reactor to automatically trip when the Turbine was manually tripped. R2DO (Chris Christensen) notified.

-- Bonnie Camp (bonniec@mail.odyssey.net), January 04, 2000.

This is the browser address for January 4, 1999:

http://www.nrc.gov/NRR/DAILY/000104dr.htm

It gives the events, nuke, event details and the plant operator. For each day you wish to check, simply substitute in the date. For instance, December 21, 1998 would be

http://www.nrc.gov/NRR/DAILY/991221dr.htm

-- Rick (rick@wmrs.edu), January 04, 2000.

correction: For each day you wish to check, simply substitute in the date. For instance, December 21, 1999 would be

http://www.nrc.gov/NRR/DAILY/991221dr.htm

-- Rick (rick@wmrs.edu), January 04, 2000.