ML20212J272

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Proposed Tech Specs,Modifying DG Fuel Oil Storage Requirements
ML20212J272
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 10/01/1999
From:
SOUTHERN NUCLEAR OPERATING CO.
To:
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ML20212J258 List:
References
NUDOCS 9910050092
Download: ML20212J272 (39)
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,- . o .-

I Enclosure 3 Edwin 1.11atch Nuclear Plant Request to Revise Technical Specifications to l Modify the Diesel Generator Fuel Oil Storage Requirements l Page Chance Instmetions i

Unit 1  !

bgs Instruction 3.8-8 Technical Specifications Replace 3.8-24 Technical Specifications Replace  ;

3.8-27 Technical Specifications Replace i B 3.8-23 Bases Replace B 3.8-49 Replace B 3.8-50 Replace B 3.8.-51 Replace B 3.8-52 Replace I B 3.8-53 Replace B 3.8-54 Replace Unit 2 bgg Instruction I l

3.8-8 Technical Specifications Replace 1 3.8-24 Technical Specifications Replace -

3.8-27 Technical Specifications Replace B ?.8-23 Bases Replace B 3.8-48 Replace B 3.8-49 Replace B 3.8.-50 Replace l B 3.8-51 Replace B 3.8-52 Replace l B 3.8-53 Replace 9910050092 991001 PDR ADOCK 05000321 p PDR IIL-5770 E3-1

_4 b AC Sources - Operating 3.8.1 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.1.2 ------------------NOTES--------------------

l (continued) 6. Starting transients above the upper j-voltage limit do not invalidate this test.

}

7. Momentary transients outside the load range do not invalidate this test.
8. This Survalliance shall be conducted on only one DG at a time.

Verify each DG: 31 days

a. Starts from standby conditions and l achieves steady state voltage a 3740 V '

and s 4243 V and frequency a '8.8 Hz l and s 61.2 Hz; and

{

b. Operates for a 60 minutes at a load a 1710 kW and s 2000 kW.

SR 3.8.1.3 - Verify each day tank contains a 500 gallons 31 days l of fuel oil.

I l

SR 3.8.1.4 Check for and remove accumulated water from 184 days i each day tank.

(continued) l HATCH UNIT 1 3.8-8 LDCR 99-61

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air 3.8.3 3.8 ELECTRICAL' POWER SYSTEMS 3.8.3 Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air LCO 3.8.3 The Unit I and swing diesel generators (DGs) stored diesel I fuel oil shall be within limits; (

m I The Unit 1 and swing DGs fuel oil transfer subsystem shall be OPERABLE; M

The lube oil and starting air subsystem shall be within limits.for each required diesel generator (DG).

APPLICABILITY: When associated DG is required to be OPERABLE.

ACTIONS

NOTE-------------------------------------

Separate Condition entry is allowed for each DG.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more required A.1 Restore fuel oil 30 days DGs with one fuel oil transfer pump to transfer pump OPERABLE status, inoperable.

B. One or more required B.1 Restore fuel oil 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> diesel fuel oil tanks level to within with fuel oil level limits. I

< 33,320 gallons and f

> 29,520 gallons. i (contint O HATCH UNIT 1 3.8-24 LDCR 99-61

Diesel fuel Oil and Tr:nsfer, Lube Oil, and Starting Air l 3.8.3 l l

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.3.1 Verify each Unit I and swing DG fuel oil 31 days storage tank contains 2 33,320 gallons of l fuel.

SR 3.8.3.2 Verify each required DG lube oil inventory 31 days is a 400 gallons.

SR 3.8.3.3 Verify fuel oil total particulate In accordance concentration of Unit 1 and swing DG stored with the Diesel fuel oil are tested in accordance with, and fuel Oil maintained within the limits of, the Diese! Testing Program fuel Oil Testing Program. ,

SR 3.8.3.4 Verify each required DG air start receiver 31 days pressure is 2 225 psig.

SR 3.8.3.5 Verify each Unit I and swing DG fuel oil 31 days.

transfer subsystem operates to automatically transfer fuel oil from the storage tank to the day tank.

SR 3.8.3.6 Check for and remove accumulated water from 184 days each Unit 1 and swing DG fuel oil storage tank. q l

SR 3.8.3.7 Verify each Unit 1 and swing DG fuel oil 18 months -

transfer subsystem operates to manually .

transfer fuel from the associated fuel oil j storage tank to the day tank of each required DG.

HATCH UNIT 1 3.8-27 LDCR 99-61

s =

i i

AC Sources - Operating )

B 3.8.1 l

. BASES SURVEILLANCE SR 3.8.1.2 (continued)

REQUIREMENTS Note 7 modifies this Surveillance by stating fhat momentary load transients because of changing bus loads do not invalidate this test.

Note 8 indicates that this Surveillance is required to be conducted on only one DG at a time in order to avoid common cause failures that might result from offsite circuit or grid perturbations.

The normal 31 day Frequency for SR 3.8.1.2 is consistent with Regulatory Guide 1.108 (Ref.10). This Frequency provides adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testirg.

SR 3.8.1.3 This volume is selected to ensure adequate fuel oil for a l minimum of I hour of DG operation at full load plus 10%.

The actual amount required to meet the SR (500 gallons) will provide approximately 1.85 hours9.837963e-4 days <br />0.0236 hours <br />1.405423e-4 weeks <br />3.23425e-5 months <br /> of DG operation at full load plus 10%. Additionally, the volume of fuel in the day tanks is used in the calculation of the 7-day continuous DG run time. (See B 3.8.3.)

The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are provided and operators would be aware of any large uses of fuel oil during this period.

SR 3.8.1.4 Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel oil day tanks once every 184 days eliminates the necessary environment for bacterial survival.

This is a means of controlling microbiological fouling. In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation. Water in the day tank may come from condensation, rain water, contaminated fuel oil, and breakdown of the fuel oil by bacteria. Checking for and removal of accumulated water minimizes fouling and (continued)

HATCH UNIT 1 B 3.8-23 LDCR 99-61

rv 1 Diesel fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 8 3.8 . ELECTRICAL POWER SYSTEMS B 3.8.3 . Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air BASES BACKGROUND- Each diesel generator (DG) is provided with a storage tank.

The 33,320 gallons required to be maintained in each of_ the l Unit I and swing DG's fuel oil tanks represent a total volume of oil, together with the volume of oil in the day tanks, sufficient to operate any two DGs at 3250 kW for a period of 7 days (Ref.1). In addition, it provides excess fuel to'also operate the other Unit's required DGs at a load sufficient to maintain power to the ccmponents, required to

-be OPERABLE by the Unit 1 Technical Specifications, for approximately 7 days. This onsite fuel oil capacity is sufficient to operate the DGs for longer than the time to replenish the onsite supply from outside sources.

Fuel oil is transferred from storage tank to day tank by either of two transfer pumps associated with each storage tank. Valving is also available so that fuel oil can be transferred between fuel oil storage tanks and the day tanks. Redundancy of pumps and piping precludes the failure of one pump, or the rupture of any pipe, valve, or tank to result in the-loss of more than one DG. All outside tanks, pumps, and piping are located underground.

For proper operation of the standby DGs, it is necessary to .

ensure the proper quality of the stored fuel oil. The fuel  !

o'.I property monitored is the total particulate concentration. Periodic testing of the stored fuel oil total particulate concentration is a method to monitor the potential degradation related to long term storage and the potential impact to fuel filter plugging as a result of high particulate levels.

The DG lubrication system is designed to provide sufficient lubrication to permit proper operation of its associated DG under all loading conditions. The system is required to circulate.the lube oil to the diesel engine working surfaces and to remove excess heat generated by friction during operation. The onsite storage in addition to the engine oil sump is sufficient to ensure 7 days' continuous operation.

This supply is sufficient ~to allow the operator to replenish lube oil from outside sources.

(continued)

HATCH UNIT 1 B 3.8-49 LDCR 99-61 l

4

Diesel fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES 1 BACKGROUND Each DG has an air start system with adequate capacity for (continued) five successive start attempts on the DG without recharging the air start receivers.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and l SAFETY ANALYSES transient analyses in FSAR, Chapters 5 and 6 (Ref. 2), and Chapter 14 (Ref 3), assume Engineered Safety Feature (ESF) systems are OPERABLE. The DGs are designed to provide sufficient capacity, capability, redundancy, and reliability to ensure the availability of necessary power to ESF systems so that fuel, Reactor Coolant System, and containment design limits are not exceeded. These limits are discussed in more detail in the Bases for Section 3.2, Power Distribution Limits; Section 3.5, Emergency Core Cooling System (ECCS) and Reactor Core Isolation Cooling (RCIC) System; and Section 3.6,' Containment Systems.

Since diesel fuel oil and transfer, lube oil, and starting air subsystem support the operation of the standby AC power sources, they satisfy Criterion 3 of the NRC Policy Statement (Ref. 4).

LCO Stored diesel fuel oil is required to have sufficient supply for 7 days of full load operation. Three fuel oil storage tanks (the Unit I and swing DGs), each 2: 33,320 gallons, and 3 day tanks, each with 500 gallons, will provide the necessary volume. Included in this requirement is the transfer capability automatically from the Unit I and swing DGs storage tanks to the associated day tank and manually from each Unit 1 and swing DG storage tank to the day tanks of each required DG. It is also required to meet specific standards for quality. Additionally, sufficient lube oil  ;

supply must be available to ensure the capability to operate >

at full load for 7 days. This requirement, in conjunction with an ability to obtain replacement supplies within 7 days, supports the availability of DGs required to shut down the reactor and to maintain it in a safe condition for an anticipated operational occurrence (A00) or a postulated {

DBA with loss of offsite power. DG day tank fuel oil requirements are addressed in LCO 3.8.1, "AC Sources-Operating," and LCO 3.8.2, "AC Sources-Shutdown."

(continued)

HATCH UNIT 1 B 3.8-50 LDCR 99-61

i

. +

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air '

B 3.8.3 BASES LCO The starting air system is required to have a minimum (continued) capacity for five successive DG start attempts without recharging the air start receivers. Only one air start i receiver per DG is required, since each air start receiver '

has the required capacity.

)

APPLICABILITY The AC sources (LC0 3.8.1 and LCO 3.8.2) are required to ensure the availability of the required power to shut down the reactor and maintain it in a safe shutdown condition after an A00 or a postulated DBA. Because stored diesel fuel oil and transfer, lube oil, and starting air subsystem support LCO 3.8.1 and LCO 3.8.2, stored diesel fuel oil and transfer, lube oil, and starting air are required to be within limits when the associated DG is required to be OPERABLE.

ACTIONS The ACTIONS Table is modified by a Note indicating that separate Condition entry is allowed for each DG. This is acceptable, since the Required Actions for each Condition provide appropriate compensatory actions for each inoperable DG subsystem. Complying with the Required Actions for one inoperable DG subsystem may allow for continued operation, and subsequent inoperable DG subsystem (s) are governed by separate Condition entry and application of associated Required Actions.

Ad With one or more required DGs with one fuel oil transfer pump inoperable, the inoperable pump must be restored to OPERABLE status within 30 days. With the unit in this condition, the remaining OPERABLE fuel transfer pump is adequate to perform the fuel transfer function. However, the overall reliability is reduced because a single failure in the OPERABLE pump could result in loss of the associated DG and loss of the fuel oil in the respective tank. The 30 day. Completion Time is based on the remaining fuel oil transfer capability, and the low probability of the need for the DG concurrent with a worst case single failure.

)

l (continued)

HA1CH UNIT 1 B 3.8-51 LDCR 99-61 I l

a

, o.

Diesel Fuel' Oil and Transfer,' Lube Oil, and Starting Air B 3.8.3

.. BASES

-ACTIONS .

L1

-(continued)-

In this condition, the 7 day fuel oil supply for a required DG is not available. .However, the Condition is restricted to fuel oil level reductions that maintain at 'least a 6 day supply. These circumstances may.be caused by events.such.

as:

a. Full load operation required for an. inadvertent start while at-minimum required level; or
b. Feed and bleed operations that may be necessitated by increasing particulate. levels or any number of other oil quality degradations.

This restriction allows sufficient time for obtaining the requisite'_ replacement volume and performing the analyses required prior to addition of the fuel oil to the tank. A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficient to complete restoration of the required level prior to declaring the DG inoperable. Tnis period is acceptable based on the remaining capacity (> 6 days), the fact that procedures will be initiated to obtain replenishment, and the low probability of an event during this brief period.

1

.C_d l

With a required DG lube oil inventory < 400 gal, cufficient  ;

lube oil to support 7 days of continuous DG operatior at i full load conditions may not be available. However, the Condition is restricted to lube oil volume reductions that maintain'at least a 6 day supply. This restriction allows sufficient time for obtaining the requisite replacement volume. A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficiont to complete restoration of the required volume prior to declaring the DG inoperable. This period is' acceptable based on the remaining capacity (> 6 days), the low rate of usage, the fact that procedures will be initiated to obtain replenishment, and the low probat,ility of an event during i this brief period.

I I

(continued)

HATCH UNIT 1 B 3.8-52 LDCR 99-61 I

a Diesel Fuel 011'and Tra'nsfer, Lube Oil, and Starting Air B 3.8.3 BASES ACTIONS . , . - QJ (continued)- .

This Condition is entered as a result of a failure to meet the acceptance criterion for particulates. Normally,.

trending of particulate levels allows sufficient time to correct high particulate levels prior to reaching the limit of acceptability. Poor sample procedures (bottom sampling),

contaminated sampling equipment,.and errors in laboratory analysis can produce failures that do not follow a trend.

Since the presence of particulates does not mean failure of the fuel. oil to burn properly in the diesel engine, since particulate concentration is unlikely to change significantly between Surveillance Frequency intervals, and since proper engine performance has been recently demonstrated (within 31 days), it is prudent to allow a brief period prior to declaring the associated DG inoperable. The '7 day. Completion Time allows for further evaluation, resampling, and re-analysis of the DG fuel oil.

L1 I With required starting air receiver pressure < 225 psig, sufficient capacity for five successive DG start attempts does not exist. However, as long as the receiver pressure is2: 170 psig, there is adequate capacity for at least one start attempt, and the DG can be considered OPERABLE while the air receiver pressure is restored to the required limit.

A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficient to complete restoration to the required pressure prior to declaring the DG inoperable. This period is acceptable based on the 1 remaining air start-capacity, the fact that most DG starts are accomplished on the first attempt, and the low probability of an event during this brief period. ]

i i

l (continued)

' HATCH UNIT.1 B 3.0-53 LDCR 99-61 l

Diesel Fuel Oil and Transfer, Lube Oil, cnd Starting Air B 3.8.3 BASES ACTIONS f_d (continued)

With a Required Action and associated Completion Time of Condition A, B, C, D, or E not met, one or more required DG fuel oil transfer subsystems inoperable for reasons other than Condition A, one or more required DG fuel oil storage tanks with fuel oil level not within limits for reasons other than Condition B, or the stored diesel lube oil or the required starting air subsystem not within limits for reasons other than addressed by Condition C or E, the associated DG may be incapable of performing its intended function and must be immediately declared inoperable.

SURVEILLANCE SR 3.8.3.1 REQUIREMENTS This SR provides verification that there is an adequate inventory of fuel oil in the Unit I and swing DG storage tanks to support the required DGs' operation for 7 days at the assumed load. (See B 3.8.3.) l The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are provided and unit operators would be aware of any large uses of fuel oil during this period.

SR 3.8.3.2 This Surveillance ensures that sufficient lubricating oil inventory (combined inventory in the DG lubricating oil sump and stored in the warehouse) is available to support at least 7 days of full load operation for each required DG.

The 400 gal requirement is based on the DG manufacturer's consumption values for the run time of the DG. Implicit in this SR is the requirement to verify the capability to transfer the lube oil from its storage location to the DG, since the DG lube oil sump does not hold adequate inventory for 7 days of full load operation without the level reaching the manufacturer's recommended minimum level.

A 31 day Frequency is adequate to ensure that a sufficient lube oil supply is onsite, since DG starts and run time are closely monitored by the plant staff.

(continued)

HATCH UNIT 1 8 3.8-54 LDCR 99-61

l .- .

AC Sources - Operating

3. s.1 SURVEILLANCE REQUIREMENTS (continued)-

SURVEILLANCE FREQUENCY SR 3.8.1.2 -------------------NOTES------------------

(continued) 6. Starting transients above the upper voltage limit do not invalidate this test.

'7. Momentary transients outside the load range do not invalidate this test.

8. This Surveillance shall be conducted on only one DG at a time.
Verify each DG
31 days
a. Starts from standby conditions and achieves steady state voltage a 3740 V and s 4243 V and frequency a 58.8 Hz and s 61.2 Hz; and
b. Operates for a 60 minutes at a load d 1710 kW and s 2000 kW.

SR 3.8.1.3 Verify each day tank contains 2 500 gallont 31 days l of fuel oil.

SR 3.8.1.4 Check for and remove accumulated water from 184 days each day tank.

(continued)

HATCH UNIT 2 3.8-8 LDCR 99-61 l

mv.. a Diesel Fuel 011;and Transfer, Lube Oil, and Starting Air 3.8.3

-3.8. ELECTRICAL POWER SYSTEMS 3.8.3 Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air LLCO 3.8.3 The Unit 2 and swing diesel generators (DGs) stored diesel fuel oil shall be within limits;-

gg The Unit 2 and. swing.DGs fuel oil transfer subsystem sh'all

-be OPERABLE; MQ-The-lube oil and starting air subsystem shall be within limits.for each' required diesel generator (DG).

APPLICABILITY: When associated DG is required to be OPERABLE.

ACTIONS-

NOTE-------------------------------------

Separate. Condition entry is allowed for each DG.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more required A.1 Restore fuel oil 30 days DGs with one fuel' oil transfer pump to transfer pump OPERABLE status, inoperable.

B. One or more required B.1 Restore fuel oil 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> diesel fuel oil tanks level to within with fuel oil level limits.

'< 33,320 gallons and

> 29,520 gallons.

(continued)  ;

HATCH UNIT 2 3.8-24 LDCR 99-61

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air 3.8.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.3.1 Verify each Unit 2 and swing DG fuel oil 31 days storage tank contains 2: 33,320 gallons of l fuel.

SR 3.8.3.2 Verify each required DG lube oil inventory 31 days is 2 400 gallons.

SR 3.8.3.3 Verify fuel oil total particulate in ar.cordance concentration of Unit 2 and swing DG stored with the Diesel fuel oil are tested in accordance with, and Fuel Oil maintained within the limits of, the Diesel Testing Program fuel Oil Testing Program.

SR 3.8.3.4 Verify each required DG air start receiver 31 days pressure is 2 225 psig.

SR 3.8.3.5 Verify each Uni', 2 and swing DG fuel oil 31 days transfer subsystem operates to automatically transfer fuel oil from the storage tank to the day tank.

SR 3.8.3.6 Check for and remove accumulated water from 184 days each Unit 2 and swing DG fuel oil storage tank.

SR 3.8.3.7 Verify each Unit 2 and swing DG fuel oil 18 months transfer subsystem operates to manually transfer fuel from the associated fuel oil storage tank to the day tank of each required DG.

HATCH UNIT 2 3.8-27 LDCR 99-61

FJ g a E AC Sources - Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.2 (continued)

REQUIREMENTS Note 7 modifies this Surveillance by stating that momentary load transients because of changing bus loads do not invalidate this test.

Note 8 indicates that this Surveillance is required to be conducted on only one DG at a time in order to avoid common cause failures that might result from offsite circuit or grid perturbations.

The normal 31 day Frequency for SR 3.8.1.2 is consistent with Regulatory Guide 1.108 (Ref. 9). This Frequency provides adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 3.8.1.3 This volume is selected to ensure adequate fuel oil for a l minimum of I hour of DG operation at full load plus 10%.

The actual amount required to meet the SR (500 gallons) will provide approximately 1.85 hours9.837963e-4 days <br />0.0236 hours <br />1.405423e-4 weeks <br />3.23425e-5 months <br /> of DG operation at full load plus 10%. Additirnally, the volume of fuel in the day tanks is used in the calculation of the 7-day continuous DG run time. (See B 3.8.3.) J l

The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are provided and operators would be aware of any large uses of fuel oil during this period.

SR 3.8.1.4 Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel. oil' day tanks once every 184 days eliminates the i necessary environment for bacterial survival. )

i This is a means of controlling microbiological fouling. In '

addition, it eliminates the potential for water entrainment  :

in the fuel oil during DG operation. Water in the day tank (continued)

HATCH UNIT 2 B 3.8-23 LDCR 99-61

0;

  • Diesel Fuel'011 and Transfer, Lube Oil, and Starting Air B 3.8.3 4 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.3 Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air BASES BACKGROUND Each diesel generator (DG) is provided with a storage tank.

The 33,320 gallons required to be maintained in each of the l Unit 2.and swing DG's fuel oil tanks represent a total volume of oil, together with the volume of oil in the day tanks, sufficient to operate any two DGs at 3250 kW for a period of 7 days (Ref.1). In addition, it provides excess fuel to also operate the other Unit's required DGs at a load sufficient to maintain power to the components, required to be OPERABLE-by the Unit 2 Technical Specifications, for approximately 7 days. This onsite fuel oil capacity is sufficient to operate the DGs for longer than the time to replenish the onsite supply from outside sources.

Fuel oil is transferred from storage tank to day tank by either of two transfer pumps associated with each storage tank. Valving is also available so that fuel oil can be transferred between fuel oil storage tanks and the day tanks. Redundancy of pumps and piping precludes the failure of one pump, or the rupture of any pipe, valve, or iank to result in the loss of more than one DG. All outside tanks, pumps, and piping are located underground.

For proper operation of the standby DGs, it is necessary to ensure the proper quality of the stored fuel oil. The fuel oil property monitored is the total particulate concentration. Periodic testing of the stored fuel oil total particulate concentration is a method to monitor the g potential degradatir,n related to long term storage and the potential impact to f uel filter plugging as a result of high particulate levels.

The DG lubrication system is designed to provide sufficient lubrication to permit proper operation of its associated DG under all loading conditions. The system is required to circulate the lube oil to the diesel engine working surfaces and to remove excess heat generated by friction during operation. The onsite storage in addition to the engine oil sump is sufficient to _ ensure 7 days' continuous operation.

.This supply is sufficient to allow the operator to replenish lube oil from outside sources.

(continued)

HATCH UNIT 2 B 3.8-48 LDCR 99-61

?.

Diesel Fuel Oil and . Transfer, Lube Oil, and Starting Air B 3.8.3 BASES BACKGROUND Each DG has an air start system with adequate capacity for (continued) five successive start attempts on the DG without recharging the air start receivers.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and SAFETY ANALYSES transient analyses in FSAR, Chapter 6 (Ref. 2), and Chapter 15 (Ref. 3), assume Engineered Safety Feature (ESF) systems are OPERABLE. The.DGs are designed to provide sufficient capacity, capability, redundancy, and reliability to ensure the availability of necessary power to ESF systems

~

so that fuel, Reactor Coolant System, and containment design limits are not exceeded. These limits are discussed in more detail in the Bases for Section 3.2, Power Distribution Limits; Section 3.5, Emergency Core Cooling System (ECCS) and Reactor Core Isolation Cooling (RCIC) System; and Section 3.6, Contain. ment Systems. j Since diesel fuel oil and transfer, lube oil, and starting air subsystem support the operation of the standby AC power i sources, they satisfy Criterion 3 of the NRC Policy l Statement (Ref. 4). 1 LC0 Stored diesel fuel oil is required to have sufficient supply for 7 days of full load operation. Three fuel oil storage tanks (the Unit 2 and swing DGs), each 2: 33,320 gallons, and 3 day tanks, each with 500 gallons, will provide the necessary volume. Included in this requirement is the transfer capability automatically from the Unit 2 and swing DGs storage tanks to tr.e associated day tank and manually from each Unit 2 and swing DG storage tank to the day tanks of each required DG. It is also required to meet specific standards for quality. Additionally, sufficient Tube oil supply must be available to ensure the capability to operate at full load for 7 days. This requirement, in conjunction  ;

with an ability to obtain replacement supplies within 7 days, supports the availability of DGs required to shut down the reactor and to maintain it in a safe condition for an anticipated operational occurrence (A00) or a postulated DBA with loss of offsite power. DG day tank fuel oil requirements are addressed in LC0 3.8.1, "AC Sources-Operating," and LC0 3.8.2, "AC Sources-Shutdown."

(continued)

HATCH UNIT 2 B 3.8-49 LDCR 99-61

Diesel fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES LCO The starting air system is required to have a minimum (continued) capacity for five successive DG start attempts without recharging the air start receivers. Only one air start receiver per DG is required, since each air start receiver has the required capacity.

APPLICABILITY The AC sources (LC0 3.8.1 and LC0 3.8.2) are required to ensure the availability of the required power to shut down the reactor and maintain it in a safe shutdown condition after an A00 or a postulated DBA, Because stored diesel fuel oil and transfer, lube oil, and starting air subsystem support LC0 3.8.1 and LC0 3.8.2, stored diesel fuel oil and transfer, lube oil, and starting air are required to be.

within limits when the associated DG is required to be OPERABLE.

ACTIONS The ACTIONS Table is modified by a Note indicating that separate Condition entry is allowed for each DG. This is acceptable, since the Required Actions for each Condition provide appropriate compensatory actions for each inoperable DG subsystem. Complying with the Required Actions for one inoperable DG subsystem may allow for continued operation, and subsequent inoperable DG subsystem (s) are governed by separate Condition entry and application of associated Required Actions.

L.1 With one or more required DGs with one fuel oil transfer pump inoperable, the inoperable pump must be restored to OPERABLE status within 30 days. With the unit in this condition, the remaining OPERABLE fuel transfer pump is adequate to perform the fuel transfer function. However, the overall reliability is reduced because a single failure in the OPERABLE pump could result in loss of the associated DG and loss of the fuel oil in the respective tank. The 30 day Completion Time is based on the remaining fuel oil transfer capability, and the low probability of the need for the DG concurrent with a worst case single failure.

(continued)

HATCH UNIT 2 B 3.8-50 LDCR 99-61 l

g Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES ACTIONS .

L1 (continued)

In this condition, the 7 day fuel oil supply for a required DG is' not available. However, the Condition is restricted to feel oil level reductions that maintain at least a 6 day supply. These circumstances may be caused by events such as:

a. Full. load operation required for an inadvertent start while at minimum required level; or b .- Feed and bleed operations that may be necessitated by increasing particulate levels or any number of other oil quality degradations.

This restriction' allows sufficient time for obtaining the requisite replacement volume and performing the analyses required prior to addition of the fuel oil to the tank. A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficient to complete restoration of the required level prior to declaring the DG inoperable. This period is acceptable based on the remaining capacity (> 6 days), the fact that procedures will be initiated to obtain replenishment, and the low probability of an event during this brief period.

.C.d With a required DG lube oil inventory < 400 gal, sufficient lube oil to support 7 days of continuous DG operation at full load conditions may not be available. However, the Condition is restricted to lube oil volume reductions that maintain at least a 6 day supply. This restriction allows

. sufficient time for obtaining the requisite replacement volume. A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficient to complete restoration of the required volume prior to declaring the DG inoperable. This period is acceptable based on the remaining capacity (> 6 days), the low rate of usage, the fact that procedures will be initiated to obtain replenishment, end the low probability of an event during this brief period.

i (continued)

' HATCH UNIT 2 B 3.8-51 LDCR 99-61 l a

(

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air o B'3.8.3 BASES ACTIONS IL1.

(continued)

This Condition is entered as a result of a failure to meet the acceptance criterton for particulates. Normally, trending of particulate levels allows sufficient time to -

correct high particulate levels prior to reaching the limit of acceptability. Poor sample procedures (bottom sampling),

contaminated sampling equipment, and errors in laboratory ',

analysis can produce failures that do not follow a trend. 7t)

Since the presence of particulates does not mean failure of ,

the fuel oil to burn properly in the diesel engine, since ~

particulate concentration 1:: unlikely to change significantly between Surveillance Frequency intervals, and N ca since proper engine performance has been recently demonstrated (within 31 days), it is prudent to allow a brief period prior to declaring the associated DG inoperable. The 7 day Completion Time allows for further evaluation, resampling, and re-analysis of the DG fuel oil.

L1 With required starting air receiver pressure < 225 psig, sufficient capacity for five successive DG start attempts does not exist. liowever, as long as the receiver pressure is 2 170 psig, there is adequate capacity for at least one start attempt, and the DG can be considered OPERABLE while the air receiver pressure is restored to the required limit.

A period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is considered sufficient to complete restoration to the required pressure prior to declaring the DG inoperable. This period is acceptable based on the  !

remaining air start capacity, the fact that most DG starts are accomplished on the first attempt, and the low probabill e of an event during this brief period.

I l

(continued) J l

-HATCH UNIT 2 B 3.8-52 LDCR 99-61 l 1

l

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES ACTIONS fil (continued)

With a Required Action and associated Completion Time of Condition A, B, C, D, or E not met, one or more required DG fuel oil transfer subsystems inoperable for reasons other than Condition A, one or more required DG fuel oil storage tanks with fuel oil level not within limits for reasons other than Condition B, or the stored diesel lube oil or the required starting air subsystem not within limits for reasons other than addressed by Condition C or E, the associated DG may be incapable of performing its intended function and must be immediately declared inoperable.

SURVEILLANCE SR 3.8.3.1 REQUIREMENTS This SR provides verification that there is an adequate inventory of fuel oil in the Unit 2 and swing DG storage tanks to support the required DGs' operation for 7 days at the assumed load. (See B 3.8.3.) l The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are provided and unit operators would be aware of any large uses of fuel oil during this period.

SR 3.8.3.2 This Surveillance ensures that sufficient lubricating oil inventory (combined inventory in the DG lubricating oil sump and stored in the warehouse) is available to support at least 7 days of full load operation for each required DG.

The 400 gal requirement is based on the DG manufacturer's consumption values for the run time of the DG. Implicit in this SR is the requirement to verify the capability to transfer the lube oil from its storage location to the DG since the DG lube oil sump does not hold adequate inventory for 7 days of full load cperation without the level reaching the manufacturer's recommended minimum level.

A 31 day frequency is adequate to ensure that a sufficient lube oil supply is onsite, since DG starts and run time are closely monitored by the plant staff.

(continued)

HATCH UNIT 2 8 3.8-53 LDCR 99-61 l

e L. O l

Enclosure 4

. Edwin I. Hatch Nuclear Plant Request to Revise Technical Specifications to Modify the Diesel Generator Fuel Oil Storage Requirements Hand-Marked Panes 4

l

.HL-5770 E4-1 j

AC Sources - Operating 3.8.1 SURVEILLANCE-REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.1.2 ------------------NOTES--------------------

(continued) 6. Starting transients above-the upper voltage limit do not invalidate this test.

7. Momentary transients outside the load range do not invalidate this test.
8. This Surveillance shall be conducted on only one DG at a time.

Verify each DG:

31 days

a. Starts from standby conditions and achieves steady state voltage a 3740 V and s 4243 V and frequency a 58.8 Hz and s 61.2 Hz; and
b. Operates for 2 60 minutes at a load a 1710 kW and s 2000 kW.

SR 3.8.1.3 Verify each day tank contains m S90 gallons of fuel oil, 31 days y

SR 3.8.1.4 Check for and remove accumulated water from 184 days each day tank.

(continued)

HATCH UNIT 1 3.8-8 Amendment No. 195

. . . . ~ ' '

LL .- ,

Diesel l Fuel Oil- and Transfer, Lube Oil, and Starting Air 3.8.3 1 3.8 -ELECTRICAL POWER SYSTEMS ,

3.8.3 Diesel. Fuel Oil and Transfer, Lube Oil, and Starting Air LCOL3.8.3. The Unit l' and swing diesel generators (DGs) stored diesel fuel oil shall be within limits; 1 M

The Unit l' and swing DGs fuel oil transfer subsystem shall be OPERABLE; M;

. The ' lube oil and starting air subsystem shall be within limits for each required diesel generator (DG).

APPLICABILITY: When associated DG is required to be OPERABLE. I ACTIONS l

NOTE-------------------------------------

Separate Condition entry is. allowed for each DG.

CONDITION REQUIRED ACTION COMPLETION. TIME A. One or more required A.1 Restore fuel oil 30 days DGs with one fuel oil transfer pump to transfer pump OPERABLE status, inoperable.

3to .!

.B. One or e required 8.1 ' Restore fuel oil 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> diesel' f el oil tanks level to within with - ft 1 oil.' level limits.

< 33,We gallons and ,

> 29,J80 gallons.  !

f

.I pto (continued)

HATCH UNIT l' 3.8-24 Amendment No. 195

o

. Diesel fuel Oil and Transfer, Lube Oil, and Starting Air 3.8.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR- 3.8.3.1 Verify each Unit I and swing DG fuel oil 31 days storage tank contains 2 33,D00' gallons of fuel. g SR 3.8.3.2 Verify each required DG lube oil inventory 31 days is e 400 gallons.

SR 3.8.3.3 Verify fuel oil total particulate In accordance concentration of Unit-1 and swing DG stored with the Diesel fuel oil are tested in accordance with, and Fuel Oil maintained within the limits of, the Diesel Testing Program ,

Fuel Oil Testing Program.

SR 3.8.3.4 Verify each required DG' air start receiver 31 days pressure is 2 225 psig.

SR .3.8.3.5 Verify each Unit I and swing DG fuel oil 31 days transfer subsystem operates to automatically transfer fuel oil from the storage tank to the day tank.

SR 3.8.3.6 Check for and remove' accumulated water from 184 days each Unit 1 and swing DG fuel oil storage tank. I SR 3.8.3.7 Verify each Unit I and swing DG fuel oil- 18 months transfer subsystem operates to manually transfer fuel from the associated fuel oil storage tank to the day tank of each required DG.

HATCH UNIT 1 3.8-27 Amendment No. 195 I

AC Sources - Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.2 REQUIREMENTS (continued) Note 7 modifies this Surveillance by stating that momentary load transients because of changing bus loads do not i invalidate this test.

Note 8 indicates that this Surveillance is required to be '

conducted on only one DG at a time in order to avoid common cause failures that might result from offsite circuit or grid perturbations.

The normal 31 day Frequency for SR 3.8.1.2 is consistent with Regulatory Guide 1.108 (Ref.10). This Frequency provides adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 3.8.1.3 This SR prevides ;;rific: tion th:t the level of fuel cil in the d:y t:nk i: :ter bov: the level et which fuel oil ie

- -etitee: tic:lly :dded. Th: level is expressed :: :n 7~41. s /s m ' equivelent vel;;;; in g:11:n:, :nd is selected to ensure adequate fuel oil for a minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of DG operation at full load plus 10%. The actual amount required to meet the foo 'sR'(400 gallons) will provide approximately &Whours of DG operation at full load. (5 u. 6 3.3.3.) f , y s-Co w. ict The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are

/dJ hr i provided and operators would be aware of any large uses of fuel oil during this period.

SR 3.8.1.4 Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in -

fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel oil day tanks once every 184 days eliminates the necessary environment for bacterial survival.

This is a means of controlling microbiological fouling. In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation. Water in the day tank may come from condensation, rain water, contaminated fuel oil, and breakdown of the fuel oil by bacteria. Checking for and removal of accumulated water minimizes fouling and (continued)

HATCH UNIT 1 B 3.8-23 REVISION 16 l

i Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 l'

B.3.8 ELECTRICAL POWER SYSTEMS B 3.8.3 Diesel Fuel Oil an'd Transfer, Lube Oil, and Starting Air BASES go e

BACKGROUND. Each die 1 generator (DG) is provided with a storage tank.

The 33, gallons required to be maintained in each of the

. Unit I and swing DG's fuel oil tanks represent a total I voln= ofvoil sufficient to operate any two DGs at 3250 kW l NW 2-

-Tiir~a period of 7 days (Reference 1). In addition, it provides excess fuel to also operate the other Unit's required DGs at a. load sufficient to maintain power to the components, required to be OPERABLE by the Unit 1 Technical Specifications, for approximately 7 days. This onsite fuel l oil capacity is sufficient to operate the DGs for longer than the time to replenish the onsite supply from outside sources.

I Fuel bil is transferred from storage tank to day tank by either of two transfer pumps associated with each storage tank. Valving is also available so that fuel oil can be transferred between fuel oil storage tanks and the day {

tanks. Redundancy of pumps and piping precludes'the failure of one pump, or the rupture of any pipe, valve, or tank to result in the loss of more than one DG. All outside tanks, pumps, and piping are located underground. {

I For proper operation of the standby DGs, it is necessary to ensure the proper quality of the stored fuel oil. The fuel oil property monitored is the total particulate concentration. Periodic testing of the stored fuel oil total particulate concentration is a method to monitor the potential degradation related to long term storage and the potential impact to fuel filter plugging as a result of high particulate levels. 4 1

The DG lubrication system is designed to provide sufficient lubrication to permit proper operation of its associated DG ,

under all loading conditions. The system is required to I circulate the lube oil to the diesel engine working surfaces l and to remove excess heat generated by friction during operation. The onsite storage in addition to the engine oil sump is sufficient to ensure 7 days' continuous operation.

This supply is sufficient to allow the operator to replenish lube oil from outside sources.

l (continued)

HATCH UNIT 1 B 3.8-49 REVISION 16 I J

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES BACKGROUND Each DG has an air start system with adequate capacity for >

(continued) five successive start attempts on the DG without recharging

.the air start receivers.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and SAFETY ANALYSES transient analyses in FSAR, Chapters 5 and 6 (Ref. 2), and Chapter 14 (Ref. 3), ast,ume Engineered Safety Feature (ESF) systems are OPERABLE. The DGs are designed to provide sufficient capacity, capability, redundancy, and reliability to ensure the availability of necessary power to ESF systems so that fuel, Reactor Coolant System, and containment design limits are not exceeded. These limits are discussed in more detail in the Bases for Section 3.2, Power Distribution Limits; Section 3.5, Emergency Core Cooling System (ECCS) and Reactor Core Isolation Cooling (RCIC) System; and Section 3.6, Containment Systems. l Since diesel fuel oil and transfer, lube oil, and starting air subsystem support the operation of the standby AC power sources, they satisfy Criterion 3 of the NRC Policy Statement (Ref. 4).

l l.O LCO Stored diesel fuel oil is required to have suffdient supply for 7 days of full load operation. Three fuel / oil storage tanks (the Unit 1 and swing DGs), each 2: 33,000 gallons,

-9will provide the necessary volume. Included in this t w .s M 3 requirement is the transfer capability automatically from the Unit 1 and swing DGs storage tanks to the associated day tank and manually from each Unit I and swing DG storage tank to the day tanks of each required DG. It is also required to meet specific standards for quality. Additionally, sufficient lube oil supply must be available to ensure the capability to operate at full load for 7 days. This requirement, in conjunction with an ability to obtain replacenent supplies within 7 days, supports the availability of DGs required to shut down the reactor and to maintain it in a safe condition for an anticipated operational occurrence (A00) or a postulated DBA with loss of offsite power. DG day tank fuel oil requirements are (continued)

HATCH UNIT 1 B 3.8-50 REVISION 16 l

?

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3  :

BASES l ACTIONS L1 (continued)

With a Required Action and associated Completion Time of Condition A, B, C, D, or F not met, one or more required DG fuel oil transfer subsystems inoperable for reasons other i

than Condition A, one or more required DG fuel oil storage  !

tanks with fuel oil level not within limits for reasons k' other than Condition B, or the stored diesel lube oil or the required starting air subsystem not within limits for reasons other than addressed by Condition C or E, the associated DG may be incapable of performing its intended function and must be immediately declared inoperable.

SURVEILLANCE SR 3.8.3.1 REQUIREMENTS This SR provides verification that there is an adequate inventory of fuel oil in the Unit I and swing DG storage tanks to support the required DGs' operation for 7 days at the assumed load. (m 5 3.2.O The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are provided and unit operators would be aware of any large uses of fuel oil during this period.

SR 3.8.3.2 This Surveillance ensures that sufficient lubricating oil inventory (combined inventor and stored in the warehouse)y is in the DG lubricating available to support oil at sump least 7 days of full load operation for each required DG.

The 400 gal requirement is based on the DG manufacturer's consumption values for the run time of the DG. Implicit in -

this SR is the requirement to verify the capability to '

transfer the lube oil from its storage location to the OG, since the DG lube oil sump does not hold adequate inventory for 7 days of full load operation without the level reaching the manufacturer's recommended minimum level.

A 31 day Frequency is adequate to ensure that a sufficient lube oil supply is onsite, since DG starts and run time are closely monitored by the plant staff.

{

(continued)

HATCH UNIT 1 B 3.8-54 REVISION 16 I i

)

i AC Sources - Operating !

3.8.1 i i

, l SVRVEILLANCE REQUIREMENTS (continued) ,

SURVEILLANCE FREQUENCY l

l SR 3.8.1.2 -------------------NOTES------------------

(continued) 6. Starting transients above the upper voltage limit do not invalidate this test.

7. Momentary transients outside the load range do not invalidate this test.
8. This Surveillance shall be conducted on only one DG at a time.

Verify each DG: 31 days

.a. Starts from standby conditions and achieves steady state voltage a 3740 V  !

and s 4243 V and frequency a 58.8 Hz and s 61.2 Hz; and

b. Operates for 2 60 minutes at a load 2 1710 kW and s 2000 kW.

]

1 SR 3.8.1.3 Verifyeachdaytankcontains2pt0 gallons 31 days of fue? oil. g i

I SR 3.8.1.4 Check for and remove accumulated water from 184 days l

each day tank.-

(continued) i l

1 HATCH UNIT 2 3.8-8 Amendment No. 135 I

o Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air 3.8.3 3.8 ELECTRICAL POWER SYSTEMS 3.8.3 Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air LC0 '3.8.3 The Unit 2 and swing diesel generators (DGs) stored diesel fuel oil shall be within limits; AND The Unit 2 and swing DGs fuel oil transfer subsystem shall be OPERABLE, AND i

The lube oil and starting air subsystem shall be within limits for each required diesel generator (DG).

APPLICABILITY: When associated DG is required to be OPERABLE. I ACTIONS l

NOTE-------------------------------------

Separate. Condition entry is allowed for each DG.  !

, i CONDITION REQUIRED ACTION COMPLETION TIME A. One or more required A.1 Restore fuel oil 30 days DGs with one fuel oil transfer pump to transfer pump OPERABLE status, inoperable.

B. One or more required G.1 Restore fuel oil 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> diesel fuel oil tanks level to within 3# Ath< 3%400 fuel oil level gallons and limits.

> 29,40rgallons.

f

(

(continued)

[LQ HATCH UNIT 2 3.8-24 Amendment No. 135

q Diesel Fuel Oil and Trensfer, Lube Oil, and Starting Air 3.8.3 l

SURVEILLANCE REQUIREMENTS SURVEILLANCE- FREQUENCY SR. 3.8.3.1 Verify each Unit 2 and swing DG fuel oil 31 days storage ~ tank'contains =2 Sht00 gallons of fuel. 3,g 3 t.

SR' 3.8.3.2 Verify each required .DG lube oil inventory 31' days is a 400 gallons.

SR 3.8.3.3 . Verify fuel oil total particulate In accordance concentration of Unit 2 and swing DG stored with the Diesel fuel oil are tested in accordance with, and Fuel Oil maintained within the limits of, the Diesel Testing Program

, Fuel Oil Testing Program.

SR.' 3.8.3.4- Verify each required DG air start receiver 31 days pressure is 2 225 psig.

SR 3.8.3.5 Verify each Unit 2 and swing DG fuel oil 31 days transfer subsystem operates to automatically transfer fuel oil from the storage tank to the day tank, i

~

SR _3.8.3.6 Check for and remove accumulated water from 184 days each Unit 2 and swing DG fuel oil storage tank.

SR 3.8.3.7 Verify each Unit 2 and swing DG fuel oil _18 months transfer subsystem operates to manually transfer fuel from the associated fuel oil storage tank to the day tank of each required DG.

i

' HATCH UNIT 2 3.8-27 Amendment No. 135 ,

AC Sources - Gicating

? 1.8.1 BASES l I

l SURVEILLANCE SR 3.8.1.2 (continued)

REQUIREMENTS I

Note 7 modifies this Surveillance by stating that momentary load transients because of changing bus loads do not invalidate this test.

Note 8 indicates that this Surveillance is required to be conducted on only one DG at a time in order to avoid common cause failures thd aght result from offsite circuit or grid perturbations.

The normal 31 day Frequency for SR 3.8.1.2 is consistent with Regulatory Guide 1.108 (Ref. 9). This Frequency provides adequate assurance of DG OPERABILITY, while minimizing degradation resulting from testing.

SR 3.8.1.3

-Thi; Z pr;vid;; v;rific;ti;n that the level of fuel cil in I$Ibb5N.52$/ .bbi lN*Dbh[II

' p "j"' M-equiNiN57;55 ~'

. ;1hn3[$ [is51Ected tolnsure adequate fuel oil for a minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of DG operation at full load plus 10%. The actual amount required to meet the -

po 400 gallons) operation at fuil will 10a provide j, hap}p,roximately L A E $ J ,. y g M hours of DG he 31 day Frequency is adequate to ensure that a sufficient {

M# O supply of fuel oil is available, since low level alarms are provided and operators would be aware of any large uses of fuel oil during this period.

i SR 3.8.1.4 Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel oil day tanks once every 184 days eliminates the necessary environment for bacterial survival.

This is a means of controlling microbiological fouling. In addition, it eliminates the potential 'for water entrainment in the fuel oil during DG operation. Water in the day tank (continued)

HATCH UNIT 2 B 3.8-23 REVISION 22 l 1

r a : j Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air )

B 3.8.3 l

B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.3 Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air BASES sw BACKGROUND Each d sel generator (DG) is provided with a storage tank.

The 33 gallons required to be maintained in each of the Unit 2 and swing DG's fuel oil tanks represent a total volume of oik sufficient to operate any two DGs at 3250 kW Mor a perToTof 7 days (Reference 1). In addition, it

/ provides excess fuel to also operate the other Unit's N6"y L required DGs at a load sufficient to maintain power to the components, required to be OPERABLE by the Unit 2 Technical Specifications, for approximately 7 days. This onsite fuel oil capacity is sufficient to operate the DGs for longer than the time to replenish the onsite supply from oui. side sources.

Fuel oil is transferred from storage tank to day tank by either of two transfer pumps associated with each storage tank. Valving is also available so that fuel oil can be transferred between fuel oil storage tanks and the day tanks. Redundancy of pumps and piping precludes the failure of one pump, or, the rupture of any pipe, valve, or tank to result in the loss of more than one DG. All outside tanks, pumps, and piping are located underground.

For proper operation of the standby DGs, it is necessary to ensure the proper quality of the stored fuel oil. The fuel oil property monitored is the total particulate concentration. Periodic testing of the stored fuel oil total particulate concentration is a method to monitor the q potential degradation related to long term storage and the 4 potential impact to fuel filter plugging as a result of high I particulate levels, j l

The DG lubrication system is designed to provide sufficient I lubrication to permit proper operation of its associated DG under all loading conditions. The system is required to circulate the lube oil to the diesel engine working surfaces and to remove excess heat generated by friction during operation. The onsite storage in addition to the engine oil sump is sufficient to ensure 7 days' continuous operation.

This supply is sufficient to allow the operator to replenish lube oil from outside sources.

(continued)

HATCH UNIT 2 B 3.8-48 REVISION 20 l l

Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air  ;

B 3.8.3 l BASES BACKGROUND Each DG has an air start. system with adequate capacity for (continued) five successive start attempts on the DG without recharging the air start receivers.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and SAFETY ANALYSES transient analyses in FSAR, Chapter 6 (Ref. 2), and Chapter 15 (Ref. 3), assume Engineered Safety Feature (ESF) systems are OPERABLE. The DGs are designed to provide sufficient capacity, capability, redundancy, and reliability to ensure the availability of necessary power to ESF systems so that fuel, Reactor Coolant System, and containment design limits are not exceeded. These limits are discussed in more detail in the Bases for Section 3.2, Power Distrdbution Limits; Section 3.5, Emergency Core Cooling System (ECCS)

-and Reactor Core Isolation Cooling (RCIC) System; and Section 3.6, Containment Systems.

j Since diesel fuel oil and transfer, lube oil, and starting air subsystem support the operation of the standby AC power {

sources, they satisfy Criterion 3 of the NRC Policy t

Statement (Ref. 4).

LCO

.31.0

. Stored diesel fuel oil is required to have suf cient supply for 7 days of full load operation. Three fue oil storage tanks (the Unit 2 and swing DGs), each a: 33, gallons, will provide the necessary volume. Included in this requirement is the transfer capability automatically from the Unit 2 and swing DGs storage tanks-to the associated day trak and manually from each Unit 2 and swing DG storage tank to the day tanks of each required DG. It is also required

/45 y f- ,.3 to meet specific standards for quality. Additionally, sufficient lube oil supply must be available to ensure the capability to operate at full load for 7 days. This requirement, in conjunction with an ability to obtain replacement supplies within 7 days, supports the availability of DGs required to shut down the reactor and to maintain it in a safe condition for an anticipated operational occurrence (A00) or a postulated DBA with loss of offsite power. DG day tank fuel oil requirements are (continued) l HATCH UNIT 2 B 3.8-49 REVISION 20 1

I Diesel Fuel Oil and Transfer, Lube Oil, and Starting Air B 3.8.3 BASES ACTIONS L1 (continued)

With a Required Action and associated completion Time of  !

Condition A, B, C, D, or E not met, one or more required DG {

fuel oil transfer subsystems inoperable for reasons other i than Condition A, one or more required DG fuel oil storage j tanks with fuel oil level not within limits for reasons t other than Condition B, or the stored diesel lube oil or the required starting air subsystem not within limits for reasons other than addressed by Condition C or E, the associated DG may be incapable of performing its intended function and must be immediately declared inoperable. {

l l

SURVEILLANCE SR 3.8.3.1 {

1 REQUIREMENTS This SR provides verification that there is an adequate inventory of fuel oil in the Unit 2 and swing DG storage tanks to support the required DGs' operation for 7 days at ,

the assumed load. (.J c. c 0 .3 . 2 , 3)

The 31 day Frequency is adequate to ensure that a sufficient supply of fuel oil is available, since low level alarms are {

j provided and unit operators would be aware of any large uses of fuel oil during this period.

SR 3.8.3.2 i j

This Surveillance ensures that sufficient lubricating oil inventory (combined inventory in the DG lubricating oil sump and stored in the warehouse) is available to support at j least 7 days of full load operation for each required DG. j The 400 gal requirement is based on the DG manufacturer's  ;

consumption values for the run time of the DG, Implicit in '

this SR is the requirement to verify the capability to transfer the lube oil from its storage location to the DG, i since the DG lube oil sump does not hold adequate inventory I for 7 days of full load operation without the level reaching the manufacturer's recommended minimum level.

A 31 day Frequency is adequate to ensure that a sufficient lube oil supply is onsite, since DG starts and run time are closely monitored by the plant staff.

(continued)

HATCH UNIT 2 B 3.8-53 REVISION 20 l l

p- .

n . ,i o INSERT I Additionally, the volume of fuel in the day tanks is used in the calculation of the seven day continuous diesel generator run time.

)

l 1

i 1

r 4< ,. a INSERT 2

,together with the volume of oil in the day tanks, l

1 l

c u_c ,

c .. o . ,

INSERT 3

. and three day tanks each with 500 gallons, I

s..s

,

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