ML030800530

Aux Feed Flow Orifice P1 Application

ML030800530
Person / Time
Site:	Point Beach
Issue date:	11/10/2002
From:	- No Known Affiliation
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2003-0094
Download: ML030800530 (1)

Text

AUX FEED FLOW ORIFICE PI APPLICATION 1] The postulated failure involves flowing service water through the orifices.

2]Since the IT's do not check recirc flow using service water as the water source, the postulated failure would not be detected during normal in-service tests. Therefore per NEI 99-02 rev2 p 33 the time should be handled through the safety determination process and entered only in the comments field.

3] Time should be calculated as the time the trains were required from the time that the new orifices were installed to the time that the trains were declared returned to service following the procedure changes to cycle the pumps on and off.

4] The above methodology should be discussed with the resident. If the resident is in agreement there is no need to submit an FAQ. The resident may decide that an FAQ should be submitted anyway to verify proper application of the NEI guidance.

Fault Exposure Time Modification Pump Start time of Completion of

____ __ ______ __ __ __ _ PMT 99-029 *A P-38A 11/02/00 10:46 10:56 99-029 *B P-38B 11/1/00 14:06 15:06 99-029 *C 1P-29 10/14/02 4:04 *#:" .,n07 *>

99-029 *D 2P-29 5/12/02 'A02.50 AFW system called OOS: 10/29/02 10:27 Contingency actions in place: 10/29/02 13:0 Info given to PRA:

The Terry Turbine drive AFPs (1/2 P-29) are only used for testing. Their average out of service time is 6.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per quarter. A portion of this is for ESFAS and Logic testing. Data is not collected while the pump is on recirc, so this reduces the time again. This would bring us to approximately 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per quarter or the following estimates:

1P less than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> on 1RO-4003 recirculation orifice