Text

Proposed Tech Specs,Reflecting Staff Evaluation of Diesel Generators & Encompassing Reporting Requirements,Per Reg Guide 1.108
	ML20138D910
Person / Time
Site:	Summer
Issue date:	12/06/1985
From:	; SOUTH CAROLINA ELECTRIC & GAS CO.
To:	;
Shared Package
ML20138D886	List: ML20138D880; ML20138D910;
References
	RTR-REGGD-01.108, RTR-REGGD-1.108 NUDOCS 8512130323
	Download: ML20138D910 (10)
	v • d • e

3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES

- OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum,' the following A.C. electrical power sources shall be OPER ABLE : a. Two physically independent circuits between the offsite transmission network and the onsite Class IE distribution system, and

b. Two separate and independent Emergency Diesel Generators (EDG), each l with:

1. A separate day tank containing a minimum of 300 gallons of fuel, l and

2. A separate fuel storage system containing a minimum of 42,500 l gallons of fuel, and

3. A separate fuel trans fer pump.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

a. With one of fsite circuit of 3.8.1.1.a inoperable:

1. Demonstrate the OPERABILITY of the remaining of fsite A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and,

2. If either EDG has not been successfully tested within the past 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , demonstrate its OPERABILITY by performing Surveillance Requirement 4.8.1.1.2.a.3 separately for each such EDG within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months unless the diesel is already operating and,

3. Restore the offsite circuit to OPERABII status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b. With one EDG of 3.8.1.1.b inoperable:

1. Demonstrate the OPERABILITY of the A.C. of fsite sources by performing Surveillance Requirement 4.8.1.1.1.a within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf ter and,

2. Demonstrate the OPERABILITY of the remaining EDG by performing Surveillance Requirement 4.8.1.1.2.a.3 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and,

3. Verify that required systems, subsystems, trains, components and devices that depend on the remaining EDG as a source of emergency power are also OPERABLE and in MODE 1, 2, or 3, that the Turbine Driven Emergency Feed Pump is OPERABLE within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SUMMER - UNIT 1 3/4 8-1 8512130323 851206 PDR ADOCK 05000395 l

p PDR ,

ELECTRICAL POWER SYSTEMS

, ACTION: ( Con t inusd)

4. Rastore ths EDG to OPERABLE statue within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

c. With one offsite circuit and one EDG inoperable:

! 1. Demonstrate the OPERABILITY of the remaining offsite A.C. source by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereaf ter and,

2. Demonstrate the OPERABILITY of the remaining EDG by performing Surveillance Requirement 4.8.1.1.2.a.3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and,

3. Verify that required systems, subsystems, trains, components and devices that depend on the remaining EDG as a source of emergency power are also OPERABLE and in MODE 1, 2, or 3, that the Turbine Driven Emergency Feed Pump is OPERABLE within 2 h ou r s . If these conditions are not satisfied within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

4. Restore one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months and,

5. Restore the other A.C. power source (of fsite circuit or diesel generator) to OPERABLE status in accordance with the provisions of Section 3.8.1.1 Ac tion Statement a. or b., as appropriate, with the time requirement of that Action Statement based on the time of initial loss of the remaining inoperable A.C. power s ou r ce .

d. With two of the required offsite A.C. circuits inoperable:

1. Demonstrate the OPERABILITY of the two EDG's by sequentially performing Surveillance Requirement 4.8.1.1.2.a.3 on both within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , unless the EDG's are already operating and,

2. Restore one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 h ou r s .

3. Following restoration of one offsite source, follow Action Statement a. with the time requirement of that Action Statement based on the time of initial loss of the remaining inoperable offsite A.C. circuit.

e. With two of the above required EDG's inoperable:

1. Demonstrate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and,

2. Restore one of the inoperable EDG's to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 ho2rs.

3. Following restoration of one EDG, follow Action Statement b.

with the time requirement of that Action Statement based on the time of initial loss of the remaining inoperable diesel generator.

SUMMER - UNIT 1 3/4 8-2

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required physically independent circuits between the offsite transmission network and the onsite Class IE distribution system shall be:

a. Determined OPERAB12 at least once per 7 days by verifying correct breaker alignment and indication of power availability, and

b. Demonstrated OPERABLE at least once per refueling outage by manually transferring the onsite Class IE power supply from the normal circuit to the alternate circuit.

4.8.1.1.2 Each EDG shall be demonstrated OPERABLE:

a. In accordance with the frequency specified in Table 4.8-1 on a STAGCERED TEST BASIS by:

1. Verifying the fuel level in the day tank and fuel storage tank.

2. Verifying the fuel trans fer . pump can be started and trans fers i fuel from the storage system to the day tank.

3. Verifying the diesel generator can start

and accelerate to synchronous speed (504 rpm) with generator voltage and frequency at 7200 + 720 volts and 60 + 1.2 Hz. Subsequently verifying the generator is synchronized, gradually loaded

to an indicated 3900-4100 kW** and operates for at least 60 minutes.

b. At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to I hour by removing accumulated water from the day tank.

c. By obtaining a sample of fuel oil in accordance with ASTM-D270-1975 at least once per 92 days and prior to the addition of new fuel oil to the storage tanks and verifying that the sample neets the following minimum requirements and is tested within the specified time limtts:

l 1. As soon as the sample is taken (or prior to adding new fuel to l 1 the storage tank) verify in accordance with the tests specified in ASTM-D9 75-77 that the sample has:

a) A water and sediment content of less than or equal to 0.05 volume percent.

b) A kinematic viscosity @ 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes.

This test shall be conducted in accordance with the manufacturer's recommen- i

dations regarding engine prelube and warmup procedures, and as applicable i regarding loading recommendations.

- This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band shall not invalidate the test.

SUMMER - UNIT 1 3/4 8-3 4

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Cr.ntinurd) c) A specific gravity as specified by the manufacturer @ 60/60*F of greater than or equal to 0.83 but less than or equal to 0.89 or an API gravity @ 60*F of greater than or equal to 27 degrees but less than or equal to 39 degrees.

2. Within 1 week after obtaining the sample, verify an impurity level of less than 2 mg of insolubles per 100 ml when tested in accordance with ASTM-D2274-70.

3. Within 2 weeks of obtaining the sample, verify that the other properties specified in Table 1 of ASTM-D975-77 and Regulatory Guide 1.137 Position 2.a are met when tested in accordance with ASTM-D9 75-77.

d. At least once per 184 days by:

1. Starting and accelerating the EDG to synchronous speed (504 rpm) with generator voltage and frequency at 7200 + 720 volts and 60 +

1.2 Hz within 10 seconds after the start signal. The EDG shall -

be started for this test by using one of the following signals:

a) Simulated loss of offsite power by itself.

b) Simulated loss of offsite power in conjunction with an ESF actuation test signal.

c) An ESF actuation test signal by itself.

d) Simulated degraded of fsite power by itself.

e) Manual.

2. The generator shall be manually synchronized, loaded to an indicated 3900-4100** kW in less than or equal to 60 seconds, and operate for at least 60 minutes.

e. At least once per refueling outage by:

1. Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service.

2. Verifying that, on rejection of a load of greater than or equal to 729 kW the voltage and frequency are maintained at 7200+

720 volts and 60 + 1.2 Hz.

3. Verifying the generator capability to reject a load of 4250 kw without tripping. The generator voltage shall not exceed 7920 volts during and following the load rejection.

4. Simulating a loss of of fsite power by itself, and:

a) Verifying de-energization of the emergency busses and load shedding from the emergency busses.

- This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band shall not invalidate the test.

SUMMER - UNIT 1 3/4 8-4

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continusd) i b) Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected shut-down loads through the load sequencer and operate for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization of these loads, the

steady state voltage and frequency shall be maintained at 7200 1 720 volts and 60 1 1.2 Hz. l

5. Verifying that on an ESF actuation test signal, without loss of of fsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 7200 +

7200 volts and 60 + 1.2 Hz within 10 seconds af ter the auto-start '

signal; the steady state generator voltage and frequency shall be maintained within these limits during this test. After 5 minutes of standby operation verify that on a simulated loss of offsite power:

a) the loads are shed from the emergency busses, b) the diesel generator does not connect to the bus for at leas t 5 seconds, and c) that subsequent loading of the diesel generator is in accordance with design requirements.

6. Simulating a loss of offsite power in conjunction with an ESF actuation test signal, and

! a) Verifying de-energization of the emergency busses and load shedding from the emergency busses.

b) Verifying the EDG starts in the emergency mode, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencer and operates for greater than~ or equal to 5 minutes and maintains the steady state voltage and frequency at 7200 1 720 volts and 601 1.2 Hz.

c) Verifying that all EDG trips, except engine overspeed, generator differential and low lube oil pressure are automatically bypassed upon loss of voltage on the emergency bus and/or a safety injection actuation signal.

7. Verifying the EDG operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

a) During 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the EDG shall be loaded to an .

indicated target value of 4676 kW (between 4600-4 700 kW)**. t i

- This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band shall not invalidate the tes t.

SUMMER - UNIT 1 3/4 8-5

1 l

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) b) During the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the EDG shall be loaded to an indicated 3900-410 0 kW** .

c) During this test the steady state voltage and frequency shall be maintained at 7200 + 720 volts and 60 + 1.2 Hz.

d) Within 5 minutes after completing this 24-hour test, per form Surve illance Requiremen t 4.8.1.1.2.e.4.b.

8. Verifying that the auto-connected loads to each EDG do not exceed the 2000 hour0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months rating of 4548 kW.

9. Verifying the EDG's capability to:

a) Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simulated restora-tion of of fsite power, b) Transfer its loads to the offsite power source, and c) Be restored to its standby status.

10. Verifying that with the diesel generator operating in a test mode, overridconnected es the testtomode its bus,(a by 1) simulated safety returning the injection diesel signalto generator standby operation and (2) automatically energizes the energency loads with of fsite power.

11. Verifying that the fuel transfer pump transfers fuel from each fuel storage tank to the day tank of each diesel via the installed cross connection lines.

12. Verifying that the automatic load sequence timer is OPERABLE with the interval between each load block within + 10% of its design

~

in t e rva l .

13. Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a) Barring Device b) Remote-Local-Maintenance Switch

f. At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel generators simultaneously, during shutdown, and verifying that the diesel generators accelerate to at least 504 rpm in less than or equal to 10 seconds.

g. At least once per 10 years by:

l

- This band is meant as guidance to avoid routine overloading of the engine.

Loads in excess of this band shall not invalidate the test.

SUMMER - UNIT I 3/4 8-6

.- . = _ . _- - - -

ELECTRICAL POWER SYSTEMS i

SURVEILLANCE REQUIREMENTS (Continued)

1. Drsining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypochlorite solution or its equivalent, and

2. Performing a pressure test of those portions of the diesel fuel oil system designed to Section III subsection ND of the ASME Code at a test pressure equal to 110 percent of the system design i pressure.

4.8.1.2 Reports - All diesel generator failures, valid or invalid, shall be i i reported to the Commission via a 30-day Special Report. These reports shall include the information recommended in Regulatory Position C.3.b of Regulatory ;

Guide 1.108, Revision 1, August 1977.

1 i

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SUMMER - UNIT 1 3/4 8-7 4

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. _ . . _ . . . _ . . . . . . _ _ _ . - - ..~ . ... _ . . _ m m._ m..

l TABLE 4.8-1 4

DIESEL GENERATOR TEST SCHEDULE 1

Number of Failures

. Number of Failures in in Last 100 Valid Last 20 Valid Tests

Tests

Test Frequency i

! <1 <4 Once per 31 days

>2** >5, Once per 7 days i

Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108,

. but determined on a per diesel generator basis.

For the purposes of determining the required test frequency, the previous

. test . failure count may be reduced to zero if, in conjunction with the i manufacturer a complete diesel overhaul to like-new conditions is completed, '

t and if acceptable reliability has been demonstrated. The reliability

criterion shall be the successful completion of 14 consecutive tests in a

single ~ series. Ten of these tests shall be in accordance with Surveillance

! Requirement 4.8.1.1.2.a.3; four tests, in accordance with Surveillance l Requirement 4.8.1.1.2.d. If this criterion is not satisfied during the first j series of tests, any alternate criterion to be used to transvalue the failure c ount to zero requires NRC approval.

- The associated test frequency shall be maintained until seven consecutive f ailure free demands have been performed and the number of failures in the last 20 valid demands has been reduced to one.

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SUMMER - UNIT 1 3/4 8-7a 1

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ELECTRICAL PO*JR SYSTEMS

.A.C. SOURCES ,

SHUTDOWN i

1 LIMITING CONDITION FOR OPERATION i

," 3.8.1.2 As a minimum, the following A.C. electrical power sources shall be

, OPERABLE:

I

a. One cii-euit betwacn the offsite transmission network and the onsite Class IE distribution system, and

b. One diesel generator

with:' l

1. A day tank containing a' minimum volume of 300 gallons of fuel, 3

2. A fuel storage system containing a minimum volume of 30,000 gallons of fuel, and

3. A fuel trans fer pump.

APPLICABILITY: MODES 5 and 6.

ACTION: ,

s With less than,khe above minimum required A.C. electrical power sources OPERABLE, j immedlately suspend al1 operations involving CORE ALTSRATIONS,- positive l i

reactivit y changes, movement of irradiated fuel, or crane operation with loads i over the fuel storage pool. Ja addition, when in MODE 5 with the Reactor Coolant loop's not filled, or in MODE 6 with the water level less than 23 feet above the

~

reactor vessel flangs, immedictely initbte corrective action to restore the required sources to OP!RABLE statuii as soq>. as poss ible, t

SURVEILLANCE REQUIREMENTS j m 4.8.1.2 The above required A.C electrical power sources shall b't demonstrated 1 OPERABLE by the perforr ace or verification of each of the Surveillance

< Requirements of 4.8.13 and 4.8.1.1.2. l

ESF Load Sequencer ufay os 'equergized in Mode 5 and 6. l

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SUMMER - UNIT 1 3/4 8-8 Y -W g

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3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1, 3/4.8.2 AND 3/4.8.3 A.C. SOURCES, D.C. SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C and D.C. power sources and associated distribution systens during operation ensures that sufficient power will be available shutdowntoofsupply the safety)related the facility equipment and 2 the mitigation andrequired foraccident control of 1) the safe conditions within the facility. The minimum specified independent and redundant A.C. and D.C. power sources and distribution systens satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assuned loss of offsite power and single failure of the other onsite A.C. source. The A.C. and D.C. s ource allowable out-of-service times are based on Regulatory Guide 1.93,

" Availability of Electrical Power Sources," December 1974. When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems , subsystems , trains, components and devices, that depend on the remaining OPERABLE diesel generator as a source of emergency power, are also OPERABLE, and that the s team-driven auxiliary feedwater pump is OPERABLE. This requirement is intended to provide assurance that a loss of offsite power event will not result in a complete loss of safety function of critical systems during the period one of the diesel generators is inope r able .

The term verify as used in this context means to administratively check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons. It does not mean to perform the surveillance requirements needed to demonstrate the OPERABILITY of the component.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systens during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling conditica for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9,

" Selection of Diesel Generator Set Capacity for Standby Power Supplies", March 10,1971,1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systens at Nuclear Power Plants", Revision 1, August 1977, and 1.137, " Fuel-Oil Systems for Standby Diesel Generators", Revision 1, October 1979, as modified by the NRC's review and approval of South Carolina Electric &

Cas Company's June 10, 1985 and December 6,1985 amendment requests.

SUMMER - UNIT 1 B 3/4 8-1

ML20138D910

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