ML20235W129

Proposed Tech Specs,Allowing one-time Extension of 18 Month Emergency Diesel Generator Surveillance Interval

ML20235W129
Person / Time
Site:	Davis Besse
Issue date:	10/09/1987
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20235W116	List: ML20235W112 ML20235W127 ML20235W129
References
TAC-66377, NUDOCS 8710160013
Download: ML20235W129 (8)

Text

- _ __ ____ ________ _. __

l l

3]4.8 ELECTRICAL POWER SYST) -

l l

3/4.8.1 A.C. SOURCES l 1

OPERATING LIMITING CONDITION FOR OPERATION 1

3.8.1.1 As a minimum, the following A.C. electrical power sources shall l be OPERABLE-I

a. Two independent circuits between the offsite transmission network j and the onsite Class 1E distribution system, each consisting of: {

I

1. One OPERABLE 345 KV transmission line,

]

)

2. One OPERABLE 345-13.8 KV startup transformer, and l

3. One OPERABLE 13.8 KV bus, and

b. Two separate and independent diesel generators each with:

1 A separate day fuel tank containing a minimum volume of 4000 gallons of fuel,

2. A separate fuel storage system containing a minimum volume of 32,000 gallons of fuel, and

3. A separate fuel transfer pump. 1 APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

a. With either an offsite circuit or diesel generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter and by performing Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore at least two

-offsite circuits and two diesel generators to OPERABLE status ,

within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 '

hours and in COLD Slf0TDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

b. With one offsite circuit and one diesel generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter and by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD

.SifUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Restore at least two DAVIS-BESSE, UNIT 1 3/4 8-1 Amendment No. 5, 97 B710160013 ADOCK h hPDR 46

- - _ _ 3?R

4 ELECTRICAL POWER SYSTE ACTION (Continued) offsite circuits and two diesel generators to OPEFABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from the time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within l the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

l

c. .With two of the above required offsite A.C. circuits inoperable, [

demonstrate the OPERABILITY of two diesel generators by perforring '

Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and at l least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, unless the diesel generators

.are already operating; restore at least one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. With only one offsite source restored, restore at least two offsite circuits ,

to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or j be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD l SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

d. With two of the above required diesel generators inoperable, l demonstrate the OPERABILITY of two offsite A.C. circuits by i performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter; restore at least one f'

of the inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Restore at -

least two diesel generators to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />  !

from time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Class 1E distribution system shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignments and indicated power availability, and i

b. Demonstrated OPERABLE at least once per 18 months during shut-down by transferring (manually and automatically) unit power )

supply to each of the 345 KV transmission lines.

4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE

L

a. At least once per 31 days on a STAGGERED TEST BASIS, if Surveil- j lance Requirement 4.8.1.1.2.c has not been performed within the l previous 31 days, by:

l  ;

1 DAVIS-BESSE, UNIT 1 3/4 8-2 Amendment No. 97

\ _. .__ _ - ___-_N

,E q i yMof,l' UMY.

ELECTRICAL POWER SYSTim L l Ii SURVEILLANCE REQUIREMENTS (Continued)

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

2. Verifying the fuel level in the fuel storage tank.

3. Verifying the fuel transfer pump can be started and trans-fers fuel from the storage system to the day tank.

4. Verifying the diesel starts and accelerates up to 900 rpm, preceded by an engine prelube and/or appropriate other warmup procedures.

5. Verifying the 8enerator is synchronized, loaded to 2 1000 kw, and operates for 1 60 minutes, and

6. Verifying the diesel generator is aligned to provide standby power to the associated essential busses.

7. Verifying that the automatic 1 cad sequence timer is OPERABLE with each load sequence time within i 10% of its required value.

b. At least once per 92 days by verifying that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM D975-68 when checked for viscosity, water and sediment.

c. At least once per 184 days on a STAGGERED TEST BASIS by:

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

2. Verifying the fuel level in the fuel storaga tank.

3. Verifying the fuel transfer pump can be started and transfers fuel from the storage system to the day tank.

4. Verifying the diesel starts from ambient condition and accelerates to at least 900 rpm in 510 seconds.

5. Verifying the generator is synchronized, loaded to 2 1000 kw, and operates for 1 60 minutes, and

6. Verifying the diesel generator is aligned to provide standby power to the associated essential busses.

7. Verifying that the automatic load sequence timer is OPERABLE with each load sequence time within i 10% of its required value. I DAVIS-BESSE, UNIT 1 3/4 8-3 Amendment No. 75, 97

d ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. At least once per 18 months during shutdown by:

1. Subjecting the diesel to an inspection in accordance with i procedures prepared in conjunction with its manufacturer's .

recommendations for this class of standby service,*

l

2. Verifying the generator capability to reject a load equal to the largest single emergency load supplied by the generator without tripping.

3. Simulating a loss of offsite power in conjunction with a safety injcetion- actuation4 test signal, and:

features system (SFAS)

(a) Verifying de-energization of the essential busses and load shedding from the essential busses, (b) Verifying the diesel starts from ambient condition on the auto-start signal, energizes the essential busses with permanently connected loads, energizes the auto-connected essential loads through the load sequencer and operates for 1 5 minutes while its generator is loaded with the essential loads.

(c) Verifying that all diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the essential bus and/or an SFAS test signal.* l

4. Verifying the diesel generator operates for > 60 minutes while loaded to 1 2000 kw.

5. Verifying that the auto-connected loads to each diesel generator do not exceed the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating of 2838 kw.

• The 18 month surveillance which is due on January 3, 1988 for EDG 1-1 and December 10, 1987 for EDG 1-2, may be delayed for EDG 1-1 until March 31, 1988 and EDG 1-2 until March 20, 1988.

DAVIS-BESSE, UNIT 1 3/4 8-4 Amendment No. 18(

. .. , , gr

~

ELECTRICAL POWER SYSTEM! I ' "I SHUTDOWN &-

LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a. One circuit between the offsite transmission network and the onsite Class IE distribution system consisting of;

1. One OPERABLE 345 KV transmission line,

2. One OPERABLE 345 KV - 13.8 KV startup transformer, and

3. One OPERABLE 13.8 KV bus, and

b. One diesel generator with:

1. Day fuel tank containing a minimum volume of 4000 gallons of fuel,

2. A fuel storage system containing a minimum volume of '

32,000 gallons of fuel, and

3. A fuel transfer pump.

APPLICABILITY: MODES 5 and 6.

ACTION:

With less than the above minimum required A.C. electrical power sources OPERABLE, suspend all operations involving CORE ALTERATIONS or positive reactivity changes until the minimum required A.C. electrical power sources are restored to OPERABLE status.

I SURVEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power sources shall be demon-strated OPERABLE by the performance of each of the Surveillance Require-

. ments of 4.8.1.1.1 and 4.8.1.1.2 except for requirement 4.8.1.1.2.a.5 and I

4.8.1.1.2.a.7. l l

DAVIS-BESSE, UNIT 1 3/4 8-5 Amendment No. 75

r----------~~- )

l  !

1

(

ELECTRICAL POWER SYSTE ,,

3/4.8.2 ONSITE POWER DISTRIBUTION SYSTEMS A.C. DISTRIBUTION - OPERATING i

LIMITING CONDITION FOR OPERATION i i

i 3.8.2.1 The following A.C. electrical busses shall be OPERABLE and energized with tie breakers open between redundant busses:

4160 volt Essential Bus #C1 4160 volt Essential Bus # D1  ;

480 volt Essential Bus # El <

480 volt Essential Bus # F1 120 volt A.C. Vital Bus # Y1 120 volt A.C. Vital Bus # Y2 120 volt A.C. Vital Bus # Y3 120 volt A.C. Vital Bus # Y4 1

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With less than the above complement of A.C. busces OPERABLE, restore the inoperable bus to OPERABLE status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REQUIREMENTS 4.8.2.1 The specified A.C. busses shall be determined OPERABLE with tie breakers open between redundant busses at least once per 7 days by verifying correct breaker alignment and indicated power availability.

DAVIS-BESSE, UNIT 1 3/4 8-6

y~ y

, 4 1 Qm, , .

k h M.,

gM<, '

'iI t 3/4.8 ELECTRICAL. POWER SYSTEMS

.' 'dASES l

( The OPERABILITY of the A.C. and D.C. power sources and associated distrib-l7, ution systems during operation ensures that sufficient power will be h '

available to supply the safety related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident

(: ,  ; conditions within the facility. The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems 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 Icast one of each of the onsite A.C. Land D.C.~ power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that

1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the facility status.

The Surveillance Requirements.for demonstrating the OPERABILITY of the station batteries are based on the recommendations of Regulatory Guide 1.129, " Maintenance Testing and Replacement of Large Lead Storage Batteries .

for Nuclear Power Plants", February 1978, and IEEE Std. 450-1980, "IEEE 1 Recommended Practice for Maintenance, Testing, and Replacement of Large I Lead Storage Batteries for Generating Stations and Substations".

Verifying average elect rolyte temperature' above the minimum for which the -l battery was sized, total battery terminal voltage on float charge, connec- l tion resistance values and the performance of battery service and discharge  !

tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.

Table 4.8-1 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity. The limits for the designated pilot cells float voltage and specific ' gravity, greater than 2.13 volts and .015 below the manufacturer's full charge specific gravity is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more than

.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than .010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

DAVIS-BESSE, UNIT 1 B 3/4 8-1 Amendment No. 100

'3/4.8 ELECTRICAL POWER SYST1. ,

BASES ..

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table _4.8-1 is permitted for up to seven days. During this seven-day period: (1) the allowable value for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not more than .020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity, ensures that an individual cell's specific gravity will not be more than .040 below the manufacturer's full charge specific gravity and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the battery's capability to perform its design function.

1 I '

I l

i DAVIS-BESSE, UNIT 1 B 3/4 8-2 Amendment No. 100 I