ML20239A254
| ML20239A254 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/14/1987 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| TAC-66313, NUDOCS 8709170217 | |
| Download: ML20239A254 (2) | |
Text
%-_
Duxn POWER GOMPANY P.O. DOX 33189 cMARLOTTE, N.C. 28242 HALH.TUGKEH rez.ern m e
('**)
September 14, 1987 l
U. S. Nuclear Regulatory Conmission Attention: Document Control Desk Washington, D. C. 20555
Subject:
Catawba Nuclear Station, Unit 2 Docket No. 50-414 Discretionary Enforcement Relief from Technical Specification 3.7.1.2
Dear Sir:
This letter constitutes written follow-up of a request for temporary waiver of Technical Specification requirements which was made (and subsequently granted) via telecons between Duke Power Company personnel and members of your staff on September 12, 1987. This temporary emergency relief from compliance with the i
Technical Specification Limiting Conditions for Operation (LCO) Action Statement was requested to avoid unnecessarily forcing Catawba Unit 2 to Mode 4 (HOT SHUTDOWN) since the LCO Action Statement would have expired at 2255 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.580275e-4 months <br /> on Stptember 12, 1987.
The proposed relief request was the result of the Auxiliary Feedwater System Turbine Driven Pump (CAPT) inoperability due to high temperature readings on the outboard bearing. The CAPT was declared inoperable at 2255 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.580275e-4 months <br /> on September 9, 1957 and Mode 3 (HOT STANDBY) was entered at 1315 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />5.003575e-4 months <br /> on September 12, 1987.
Cotitinued inoperability of the CAPT without Discretionary Enforcement would have required the unit to enter Mode 4 (HOT SHUTDOWN) by 2255 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.580275e-4 months <br /> on September 12, 1987.
Duke Power Company personnel replaced the outboard bearing and realigned the pump three times before receiving satisfactory results with regard to the bearing temperatures. The CAPT was declared operable at 0715 hours0.00828 days <br />0.199 hours <br />0.00118 weeks <br />2.720575e-4 months <br /> on September 14, 1987.
The function of the CA system is to provide feedwater to the S/G's in the event that the Condensate /Feedwater System is lost. This water ensures a decay heat removal path to cool the Reactor Coolant System until such time that the Residual Heat Removal System may be operated. The CA motor-driven pumps remained operable throughout this event.
sd Ol 8709170217 870914 ~
0 PDR ADOCK 05000414 7g P
PDR yo
.c U. S. Nuclear Regulatory Commission September 14, 1987 P. age Two This event posed no undue risk to the health and safety of the public. Also, one thermal cycle on the reactor was avoided. This has real benefits in terms of availability, component lifetime and safety.
Very truly yours, B ~T A l Hal B. Tucker RWO/119/sbn Attachment xc:
Dr. J. Nelson Grace, Regional Administration U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station l
l 1
l