ML17346B241

Proposed Tech Specs Requiring 18-month Insp of Diesel Generator Be Performed During Next Unit 3 Refueling Outage

ML17346B241
Person / Time
Site:	Turkey Point
Issue date:	10/20/1986
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17346B240	List: ML17346B239 ML17346B241
References
TAC-66377, NUDOCS 8610240326
Download: ML17346B241 (9)

Text

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~All hilt: Appll I Al I I A 111 ~ I I the emergency power system.

~0h 'ective: To verify that the emergency power systen will respond pranptly and pr operly.

~g<< I ": lh stated:

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l. Diesel Generator Each diesel generator shall be delonstrated OPERABLE:

a.. On a staggered test basis (nonconcurrently) at the frequency specified by Table 4-8-1 by:

1. Verifying fuel level fn the day tank and fn the engine-mounted fuel tank.

2. Verifying fuel level fn the fuel storage tank.

3. Verf'fyfng that a fuel transfer pump can be started and transfers fuel frcm the Diesel Of 1 Storage Tank to the Day Tank.

4. Verifying that the diesel generator starts fran ambient conditions and accelerated to provide 60+1.2 Hz frequency and 4160+624 volts fn <15 secondse

5. Ver ifyfng that the generator fs synchronfzed, 1oaded to >2500 kw wfthfn 10 minutes and operates for >60 minutes-

6. Verifying that the diesel generator cooling system functfons within design limits duri ng the 1-hour full load test required by Specification 4'8.1.a.5.

b. At least once per 92 days by verffyfng that a sample of diesel fuel fran the fuel storage tank is within acceptable lfmfts when checks for viscosfty, water, and sediment.

Ce. During each Unit 3 refueling outage by:

I- Subjecting the diesel to an inspection fn co<unction wi th its manufacturer's recaanendatfons for this class of standby servi ceo

d. At least once per 18 months by:

l. Verffyfng the dfesel generator's capahfffty to:

I 4.8-1 Amendment Hos.

8610240326 861020 PDR ADaCK OSOOO2SO P PDR jj

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(a) Reject a load of 200 kw without exceeding 4160+624 volts and 60+1.2 Hz.

{b) Reject canplete load without exceeding 4160+624 volts, and wfthout exceeding overspeed limits.

2. Verifying that diesel generator trips which are operable during the test mode of dfesel operation are inoperable when the dfesel fs not in the test mode of operation.

3- Alternately initiating one of the followfng two df'esel startup tests:

(a) Simulate a safety injection signal, and allow the diesel generator to achieve nanfnal rated voltage and speed. Then simulate a loss of offsfte power, and allow the diesel generator to load and stabflfze-(b) Simulate a loss of offsfte power, and allow-:

the diesel generator to load and stabflfze. Then simulate a safety injection signal, and allow the diesel generator to sequence safety loads and stabilize.

4. Honftorfng the tests specified fn 4.8.1.c.4 to: l (a) Verify proper deenergizatfon and load shedding frcm the 4160 volt busses-(b) Verffy that the diesel generator starts from ambient conditions and accelerates to provfde 60+1.2 Hz frequency and 4160+624 volts fn <T5 seconds.

5. Verifying that the diesel generator operates for I at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> by performing the following tests:

(a) Load the diesel generator to >2750 kw during the ffrst 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> test.

(b) Load the diesel generator to >2500 kw during the last 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> test.

(c') Verify that voltage, frequency, and coolf ng ,

system functions are within design limits during the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> full-load test.

6. Demonstratfng the abflfty to sequentially:

4.8-2 Amendment Nos.

bafle 4th (a) Synchronfze the dfesel generator offsfte power the generator fs

. supplyfng emergency loads; (b) fransfer the energencj load to offsfte pomr; (c) isolate the dfesel generator; and (d) Return the diesel generator to standby status-7- Verffyfng that a to - conrected loads to each dfesel generator do not'exceed 2750 kv.

e At least once per 10 years, or after any modfffcatior.

that could affect dfese1 generator fndependence, start both diesel generators simultaneously at a tfmc Den both reactors are shutdo~~ and verffy that both dfesel generators prcvfde 60+ .2 H frequency and 4160+624 volts fn (15 seconh.

20 STATION ~Ecew

a. HIot call specific pavISes AQ 5e zaaiK and recorded daily. The pilot cel1 aha11 be rotated on a monthly basis.

Rechly each battery aMI be glen ca ey~ing charge and a c~~s specific P'~ y ~ mirage readings ~i b and recorded fo each cell. Qatar eba11 be added to restore normal 1ereL and coraf. mater uee shall be recorded. Caaplece vtana1 Sm-speccion of batteries shall be Me monthly

c. Quarterly decaQed +wM inspection shall be made of chargers.

d. hnnnally connections shall be chalet for tighrnesa and anti-coroaion coating shall be appfied to incerconnec~ona

e. Perform Load test annually.

SAFETY AND NO SIGNIFICANT HAZARDS CONSIDERATION EVALUATION Descri tion of Amendment Re vest:

Pa es 4.8-l throu h 4.8-3 The surveillance requirements contained in Technical Specification 4.8, Emergency Power Systems Periodic Tests, are designed to assure that the quality of the equipment and components is maintained, that the facility operation will be within the safety limits and that the limiting conditions for operation of the system will be met. The inspection and test frequencies specified are often enough to identify and correct any mechanical or electrical failure before it can result in a system failure.

Technical Specification 4.8.I.C. I requires that each diesel generator be subjected to an inspection in accordance with the manufacturers recommendations at least once each eighteen months. Technical specification 4.0.l states that interval may be adjusted plus or minus 25% to accornodate normal test schedules. This inspection was last completed on the "A" and "B" diesel generators on December 23, l 984 and January l3, l 985 respectively. This would require the next inspections to be performed no later than November I I, l986 and November 27, I 986.

Prior to the startup of Turkey Point Unit 4 from the last refueling outage, Region II requested that FPL defer performing the eighteen month inspections until the Unit 3 refueling outage, scheduled to begin March l987. The Region wants the inspections to be done with only one unit at power, although the current technical specifications would allow a diesel to be taken out of service for the inspection with both units at power.

The proposed change would defer the required inspections until the next Unit 3 refueling outage. Subsequent inspections would then be performed during each succeeding Unit 3 refueling outage.

The eighteen month preventive maintenance inspection performed in December l984 and January l986 indicated no excessive wear of engine internals (after approximately 550 hours0.00637 days <br />0.153 hours <br />9.093915e-4 weeks <br />2.09275e-4 months <br /> of operation on each diesel generator). Also a review of the "A" and 'B" diesel generator operating and maintenance history since that time has indicated no existence of problems. Because the diesel generators are operated infrequently for short periods of time, excessive w'ear of the engine internals which could affect operability would not be expected to occur.

Therefore deferral of the inspections on a one time basis, until the Unit 3 refueling outage, would be acceptable. Operability of the diesel generators would continue to be verified by performance of the other surveillance requirements which remain unchanged. In addition, discussions with the diesel generator engine manufacturer indicate that deferral of the required inspections until the next Unit 3 refueling outage would not adversely affect diesel generator engine operability.

TCG6/002/3

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Basis for No Si nificant Hazards Consideration Determination The commission has provided standards for determining whether a significant hazards consideration exists (IO CFR 50.92(c)). A proposed amendment to an operating license for the facility involves no significant hazards consideration if operation of the facility in accordance with the proposed amendment would not:

(I) involve a significant increase in the probability or consequences of an accident previously evaluated, or (2) create the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant reduction in a margin of safety.

Operation of Turkey Point Units 3 and 4 in accordance with the proposed amendments would not:

(I) & (2) Involve a significant increase in the probability or consequences of an accident previously evaluated, or create the possibility of a new or different kind of accident from any previously evaluated since this change does not involve a change in the operation or the physical design of the emergency power systems.

(3) Involve a significant reduction in a margin of safety Deferral of the inspection would not significantly increase the possibility of undetected degradation of the diesel generators, because the diesel generators are operated infrequently for short periods of time. The last inspection indicated no excessive wear of engine internals after approximately 550 hours0.00637 days <br />0.153 hours <br />9.093915e-4 weeks <br />2.09275e-4 months <br /> of operating time on each diesel generator. The limiting conditions for operation, and other surveillance requirements to verify operability are unchanged and remain in effect.

Based on the above discussion, operation of the facility in accordance with the proposed amendment would not involve a significant increase in the probability or consequences of an accident previously evaluated, or create the possibility of a new or different kind of accident from any accident previously evaluated, or involve a significant reduction in a margin of safety.

Therefore, operation of the facility in accordance with the proposed amendmant would pose no threat to the public health and safety, afnd would not involve a significant hazards consideration.

TCG6/002/4

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