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Proposed Tech Specs Re Limiting Conditions for Operation & Surveillance Requirements for Electrical Power Sys Ac Sources
	ML20245A303
Person / Time
Site:	Davis Besse
Issue date:	06/12/1989
From:	; TOLEDO EDISON CO.
To:	;
Shared Package
ML20245A299	List: ML20245A297; ML20245A300; ML20245A303;
References
	NUDOCS 8906210197
	Download: ML20245A303 (9)
	v • d • e

Docket' Number 50-346 License Number NPF-3 2="r "

Page 6 3/4.8 ELECTRICAL POWER SYSTEMS -

THIS PAGE PROMDED,.

i 3/4.8.1 A.C. SOURCES l@U l hh N,,n l , .-'lUlkshab{iN l

OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

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

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1. One OPERABLE 345 KV transmission line,

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

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 l 3. A separate fuel transfer pump.

l 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 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and by performing Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . Restore at least two offsite circuits and two diesel generators to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least 110T STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SIIUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

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 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . Restore at least 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 IIOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD l SIIUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore at least two 8906210197 890612 PDR ADOCK 05000346 P PDC l ll DAVIS-BESSE, UNIE 1 3/4 8-1 Amendment No. 6,97

Docket h mber 50-346 License' Number NPF-3

)d}bj3 d.i Serial, Number 1670 -

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'Attachhent 1-Pitge 7 ELECTRICAL POWER SYSTEMS 5 j

ACTION (Continued) offsite circuits and two diesel generators to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from the time of initial loss 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 .

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c. With two of the above required offsite A.C. circuits inoperable, demonstrate the OPERABILITY of two diesel generators by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, unless the diesel generators I are already operating; restore at least 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 vithin the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . With only one offsite source restored, restore at least two offsite circuits ] i to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or l 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 . I

d. With two of the above recuired diesel generators inoperable, !

demonstrate the OPERABILITY of two offsite A.C. circuits by J performing Surveillance Requirement 4.8.1.1.1.a within cne hour 1 and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore at least one of the inoperable diesel generators 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 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . Restore at least two diesel generators to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months 1 from time of initial loss or be in at least HOT STANDBY vithin '

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 l hours.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Class IE 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- I

' down by transferring (manually and automatically) unit power !

supply to each of the 345 KV transmission lines. ** l 4.8.1.1.2 Each diesel generator shall be demonstrated OPERABLE:

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

, The 18 month surveillance which is due on March 1, 1988 may be delayed until April 1, 1988 DAVIS-BESSE, UNIT 1 3/4 8-2 Amendment No. 97,107

Docket Number 50-346 Licen,se Number NPF-3 Setial,N'ueber 1670 '7' p }g g$ Uh

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G.J g QQ){ (0 ff ELECTRICAL POWER SYSTEMS fUgl[h}P t!YidB tU2tl UhaM 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 ransfer 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 generator is synchronized, loaded to 1 1000 kw, and operates for 1 60 minutes. l

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 E 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 storage 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 5 10 seconds.

i 5. Verifying the generator is synchronized, loaded to 3 1000 l kw, and operates for 1 60 minutes. l

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.

DAVIS-EESSE, UNIT 1 3/4 8-3 Amendment No. 15, 77, 105

Docket Number 50-346 L$ cense Number NPF-3 Serial Number.1670

' Attachment 1 Page 9 ELECTRICAL POWER SYSTEMS 1

SURVEILLANCE REQUIREMENTS (Continued) l 1

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

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1[. Verifying the generator capability to reject a load equal j l s to the largest single emergency load supplied'by the generator without tripping.

jI R Simulating a loss of offsite power in conjunction with a l-h- safety features actuation system (SFAS) test signal, and- i 1

(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- i and operates for > 5 minutes while its generator is l

loaded with the essential loads. :

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(c) Verifying that all diesel generator trips, except j engine overspeed and generator differential, are ;

automatically bypassed upon loss of voltage on the !

essential bus and/. e an SFAS test signal.* i Verifying the diesel generator operates for > 60 minutes ,

2 "3" /.t while loaded to > 2000 kw. -

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

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s Docket Number 50-346 License Number NPF-3 a 15 ) t' >

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{$!AhO. .i dthy(l$d,h m L ELECTRICAL POWER SYSTEMS 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 1E 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 l- s

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.

. SURVEILLANCE REQUIREMENTS , 4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the perfomance of each of the Surveillance Requirements of 4.8.1.1.1 and 4.8.1.1.2 except for requirement

4. 8.1.1. 2. a . 5 and 4.8.1.1.2.a.7.

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

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Docket Number 50-346 License Number NPF-3 , , , , , , _ _ , , , . .

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Page 11 p

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,hJ O C 9 0 M UMin %ikaa v!W 3/4.8 ELECTRICAL POWER SYSTEMS BASES The OPERABILITY of the A.C. and D.C. power sources and associated distribu-tion systems during operation ensures that sufficient power will be 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

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redundant A.C. and D.C. power sources and distribution systems satisfy the {

requirements of General Design Criterion 17 of Appendix "A" to 10 Ci1 50. j The ACTION requirements specified for the levels of degradation of the l 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 of each of the onsite A.C. and 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. l 1 The Surveillance Requirements for demonstrating the OPERABILITY of the station batteries are based on the recommendations of Regulstory Guide 1.129, " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants", February 1978, and IEEE Std. 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations".

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connec-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 ccanected 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

Docket-Number 50-346 l License Number NPF-3 w %

Serihl Num'ber 1670 AttacInneht 1 fO L hp Oh IIRCU li fi b -

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3/4.8 ELECTRICAL POWER SYSTEMS BASES Operation with a battery cell's parameter outside the normal limit but I within the allowable value specified in Table 4.8-1 is permitted for up I to seven days. During this seven-day period: (1) the allowable value l 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 i manufacturer's recommended full charge specific gravity, ensures that the l decrease in rating will be less than the safety margin provided in ;

sizing; (3) the allowable value for an individual cell's specific j gravity, ensures that an individual cell's specific gravity will not be 1 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.

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

Docket Number 50-346

- License Number NPF-3 Serial Number 1670 Attachment 2 Page 1 SIGNIFICANT fiAZARDS CONSIDERATION Description of Proposed Technical Specification Change The purpose of this significant hazards consideration is to review proposed 1 changes to the Davis-Besse Nuclear Power Station Technical Specification (TS) 3/4.8.1.1 (A. C. Sources - Operating), Surveillance Requirement 4.8.1.1.2 and 3/4.8.1.2 (Electrical Power Systems - Shutdown), Surveillance Requirement 4.8.1.2. This surveillance requires that at least once per 18 months that the emergency diesel generators be inspected by procedures prepared in conjunction l vith its manufacturer's recommendations. This request proposes to extend the l

surveillance period from 18 months to 30 months. The extension provisions of I Specification 4.0.2 vill no longer be applicable to this surveillance. The Technical Description (Attachment 1) discusses these changes.

Significant Hazards Consideration The Nuclear Regulatory Commission has provided standards in 10CFR50.92(c) for determining whether a significant hazard exists. A proposed amendment to an Operating License for a facility involves no significant hazards if operation of the facility in accordance with the proposed changes would not: 1) Involve a significant increase in the probability or consequences of an accident previously evaluated; 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.

l l The proposed changes do not involve a significant hazards consideration because the operation of the Davis-Besse Nuclear Power Station, Unit No. 1, in 4 l

accordance with these changes vould:

l 1. Not involve a significant increase in the probability or consequences of l an accident previously evaluated because the diesel generators are standby equipment which do not contribute to the occurrence of a USAR accident. i Extension of the surveillance frequency does not change the diesel generator function or operation. Increased performance trending of selected parameters will be performed to identify adverse operating 1 trends. The ability of the diesel generators to respond and operate as !

required vill not be degraded as concurred with by the manufacturer.

[10CFR50.92(c)(1)] l

2. Not create the possibility of a new or different kind of accident from any accident previously evaluated because the diesel generators ce.nnot initiate an accident and no hardware changes are being made. On matters related to nuclear safety, all accidents are bounded by previous analysi:

and no new malfunctions are involved. [10CFR50.92(c)(2)]

3. Not involve a significant reduction in a margin of safety because the assumptions in the USAR remain unchanged and the diesel generators vill continue to perform their function. Past experience with this class of equipment, demonstrated reliability of the diesel generators at Davis-Besse, and increased trending to identify adverse operating trends support the extension of the inspection interval. [10CFR50.92(c)(3)]

. ' bocket Number 50-346

' License Number NPF-3 Serial Number 1670 Attachment 2 Page 2 Conclusion Based on the discussion above, it is concluded that the proposed change does not involve a significant hazards consideration.

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ML20245A303

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