Waterford Diesel Generators Are Junk

They are just not doing the proper proactive maintenance on this machines. Within hours, they had a generator protective trip and then during testing a damper failed on startup. It implies you could have both DGs fail in a bad accident.  

***But  the inverse, if EDG A is already running and loaded, then do they really need to worry about a EDG start?

But in the inverse,  usually one division is in maintenance test, and the other is protected, do not touch.

So with EDG A in test/ maint, there could have other systems / equip in maint / test and not ready for a safety function (SF).

Now with Div B protected, and now have an inop EDG B when it is protected and being counted on to perform its SF,  I think you may have a major gap in reliability and high likelihood of protected Div B ECCS failure.

Time for some deep probing questions that only a skilled experienced deep prober can perform.

***Sep 1 at 11:00 AM  

I am glad I have you to do the deep probing. 

Were you going to use a foot long ruler or yard stick?

This is a severe indicator of maintenance in the whole plant.

Power Reactor	Event Number: 51348
Facility: WATERFORD Region: 4 State: LA Unit: [3] [ ] [ ] RX Type: [3] CE NRC Notified By: MARIA ZAMBER HQ OPS Officer: JEFF HERRERA	Notification Date: 08/26/2015 Notification Time: 15:47 [ET] Event Date: 08/26/2015 Event Time: 07:40 [CDT] Last Update Date: 08/31/2015
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(v)(A) - POT UNABLE TO SAFE SD 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION	Person (Organization): VIVIAN CAMPBELL (R4DO)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
3	N	Y	100	Power Operation	100	Power Operation

Event Text

BOTH EMERGENCY DIESEL GENERATORS DECLARED INOPERABLE "This is a non-emergency notification from Waterford 3. On August 26, 2015, at 0111 CDT, Emergency Diesel Generator (EDG) 'A' was declared inoperable following a trip of EDG 'A' on Generator Differential. Technical Specification (TS) 3.8.1.1 actions b. and d. were entered. EDG 'A' was being routinely run in accordance with OP-903-115, 'Train A Integrated Emergency Diesel Generator/Engineering Safety Features Test', Section 7.4, '24 hr EDG A Run with Subsequent Diesel Start' to satisfy Technical Specification Surveillance Requirement 4.8.1.1.2 6. EDG 'B' was subsequently started per TS 3.8.1.1 action b. (1). At 0740 CDT, EDG 'B' was declared inoperable and TS 3.8.1.1 f. was entered due to the exhaust fan not starting when the diesel engine was started. "Troubleshooting determined that the EDG B exhaust fan did not start due to HVR-501B (EG B ROOM OUTSIDE AIR INTAKE DAMPER) not opening. Action was taken to isolate air and fail HVR-501B to its open safety position. At 1001 CDT, EDG 'B' was declared operable and TS 3.8.1.1.f. was exited following verification of proper operation of the EDG 'B' exhaust fan. "Waterford 3 is currently in TS 3.8.1.1 actions b. and d. Actions to verify a temporary EDG is available and restore EDG 'A' to operable status are in progress. "This event is reportable pursuant to 10 CFR 50.72(b)(3)(v) (A) and 10 CFR 50.72 (b)(3)(v) (D), 'event or condition that could have prevented fulfillment of a safety function of structures or systems that are needed to (A) shut down the reactor and maintain it in a safe shutdown condition' and (D) 'mitigate the consequences of an accident due to both emergency diesel generators being inoperable.'" "The NRC Resident Inspector has been notified." * * * UPDATE FROM SCOTT MEIKLEJOHN TO DONALD NORWOOD AT 1328 EDT ON 8/31/2015 * * * "The following is a correction to a non-emergency event notification from Waterford 3 originally made on 8/26/2015: "On August 26, 2015, at 0111 CDT, Emergency Diesel Generator (EDG) 'A' was declared inoperable following a trip of EDG 'A' on Generator Differential. Technical Specification (TS) 3.8.1.1 actions b and d were entered. EDG 'A' was being routinely run in accordance with OP-903-115, 'Train A Integrated Emergency Diesel Generator/Engineering Safety Features Test,' Section 7.4, '24 hr EDG A Run with Subsequent Diesel Start' to satisfy Technical Specification Surveillance Requirement 4.8.1.1.2(e)6. EDG 'B' was subsequently started per TS 3.8.1.1 action b.(1). At 0740 CDT, EDG 'B' was declared inoperable and TS 3.8.1.1 f was entered due to the room exhaust fan not starting when the diesel engine was started. "Troubleshooting determined that the EDG B room exhaust fan did not start due to HVR-501B (EDG B ROOM OUTSIDE AIR INTAKE DAMPER) not opening. Action was taken to isolate air and fail HVR-501B to its open safety position. At 1001 CDT, EDG 'B' was declared operable and TS 3.8.1.1.f was exited following verification of proper operation of the EDG 'B' room exhaust fan. "Waterford 3 is currently in TS 3.8.1.1 actions b and d. Actions to verify a temporary EDG is available and restore EDG 'A' to operable status are in progress. "This event is reportable pursuant to 10 CFR 50.72(b)(3)(v)(A) and 10 CFR 50.72(b)(3)(v)(D), Event or Condition that Could Have Prevented Fulfillment of a Safety Function of structures or systems that are needed to (A) shut down the reactor and maintain it in a safe shutdown condition and (D) mitigate the consequences of an accident due to both emergency diesel generators being inoperable. "The NRC Resident Inspector has been notified."